Answer:
all above.
Explanation:
I had the same question for k12.
Cells arise only from previously___with cells passing copies of their____ on to their daughter cells.
A) Dead cells, divided cells
B) Alive cells, proteins
C) Existing cells, genetic material
D) Alive cells, dead cells
reductive evolution is the choose one: a. loss or mutation of dna encoding unselected traits. b. evolutionary decrease in body size of organisms over time. c. decrease in species number over time due to extinction. d. opposite of oxidative evolution.
Reductive evolution is the a. loss or mutation of DNA encoding unselected traits.
In the field of biology, reductive evolution can be described as an evolution in which microorganisms have the capability to delete certain genes from their genomes.
As a result of reductive evolution, the DNA becomes downsized as a part of DNA is lost.
Reductive evolution is a degenerative kind of evolution by which genes for unselected traits are removed.
In microorganisms, this process usually occurs when the microorganism is engulfed by a predator or when a microorganism is living in a restrictive state.
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ONLY AND ONLY SMART PEOPLE ANSWER THIS:)
At that time its sensible heat released over the time period it means that it releases heat from any degree Celsius up to zero degree Celsius.
It happens because heat is released from water to surrounding by the help freezer or refrigerator.
When latent heat is released than phase change will take place. It means that when water reaches at zero degree Celsius than latent heat will released than water become ice at zero degree Celsius.
The word associated with the phenomenon is phase change.
What is freezing process?Freezing has been the process in which the phase change or state change takes place and it means that a process in which a liquid change into solid.
Freezing process can be achieved by the extraction of heat i.e or removing latent heat, latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without change in temperature.
Therefore, At that time its sensible heat released over the time period it means that it releases heat from any degree Celsius up to zero degree Celsius.
It happens because heat is released from water to surrounding by the help freezer or refrigerator.
When latent heat is released than phase change will take place. It means that when water reaches at zero degree Celsius than latent heat will released than water become ice at zero degree Celsius.
The word associated with the phenomenon is phase change.
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jeff was in a fatal accident in which he died almost instantly due to a nervous system injury that interfered with essential life functions such as heartbeat and respiration. which part of jeff's nervous system is most like to have been injured?
The injury that caused Jeff's immediate death and interfered with essential life functions like heartbeat and respiration occurred in the brainstem.
The brainstem is a vital region of the central nervous system located at the base of the brain. It acts as a bridge between the brain and the spinal cord and is responsible for regulating several essential functions necessary for life, including:
Autonomic functions: The brainstem controls autonomic functions that are essential for survival, such as heartbeat (cardiac function) and respiration (breathing).
Cardiovascular control: The brainstem contains centers that regulate blood pressure, heart rate, and the constriction/dilation of blood vessels.
Respiratory control: The brainstem is involved in controlling the rate and depth of breathing.
Reticular activating system (RAS): The brainstem contains the reticular activating system, which plays a critical role in maintaining consciousness and alertness.
A severe injury to the brainstem can disrupt these vital functions, leading to immediate and fatal consequences, such as the inability to maintain heartbeat and respiration, resulting in rapid death.
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bioremediation uses microbes that choose one: a. can modify environmental toxins through normal metabolism. b. can reproduce rapidly and overcome other microbial species. c. are parts of the microbiome. d. can assimilate nitrogen into nitrate.
Bioremediation uses microbes that a. can modify environmental toxins through normal metabolism.
Bioremediation broadly refers to any process wherein an organic system, living or useless, is hired for casting off environmental pollution from the air, water, soil, flue gasses, industrial effluents, and many others., in natural or artificial settings.
Bioremediation technique is degrading, getting rid of, changing, immobilizing, or detoxifying numerous chemical compounds and physical pollutants from the environment via the interest of bacteria, fungi, algae, and plants.
Bioremediation allows for smoothing up water sources, creating more healthy soil, and improving air great around the globe. but not like excavation-based totally remediation techniques, which may be disruptive, bioremediation is less intrusive and might facilitate remediation of environmental impacts without adverse sensitive ecosystems.
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Which Cranial nerve arises directly off of brain and it’s branches pass through several openings on anterior and inferior skull to innervate facial area?
Answer: The facial nerve
Explanation: It arises from the brain stem and extends posteriorly to the abducens nerve and anteriorly to the vestibulocochlear nerve. I hope this is what you're looking for.
Answer:
I think it's the facial area
when you have a severe fever, what grave consequence may occur if the fever is not controlled?when you have a severe fever, what grave consequence may occur if the fever is not controlled?change in the tertiary structure of your enzymesbinding of your enzymes to inappropriate substratesdestruction of your enzymes' primary structureremoval of amine groups from your proteinsremoval of the amino acids in the active sites of your enzymes
"Change in the folding of enzymes" is the grave consequence that may occur if the fever is not controlled.
When someone gets a fever, their body temperature is high. Infections typically cause it. If a fever is not treated, a change in the way your enzymes fold may have serious consequences. Hydrogen bonds and other weak intermolecular interactions hold enzymes in place while they are folding.
The high temperatures brought on by a fever can disrupt these relationships. Enzymes that are not folded can harm a cell because they cannot fulfill their necessary activities when they are unfolded. This is because their three-dimensional form determines how they work. Because heat accomplishes those things to proteins, the other options are not fatal outcomes of a fever.
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Why is there a need to produce okazaki fragments on the lagging strand, but not on the leading strand of dna?.
There is a need to produce Okazaki fragments on the lagging stand, but not the leading strand of the DNA because the two parental strands of DNA are antiparallel and DNA polymerase makes DNA in the 5' to 3' direction only.
The leading strand of the DNA can be described as a strand that is in the 5' to 3' direction. As the DNA polymerase that is required for replication works in this direction hence there is no need of Okazaki fragments to be formed for the leading strand.
The lagging strand, on the other hand, is in the 3' to 5' direction which is the opposite of the working of DNA polymerase. Hence, for the lagging strand, Okazaki fragments are formed which are then joined by the DNA ligase to make the new strand from the lagging strand.
Although a part of your question is missing, you might be referring to this question:
Why is there a need to produce Okazaki fragments on the lagging strand, but not on the leading strand of DNA?
-The leading strand opens first, and so Okazaki fragments are not needed. The lagging strand unwinds second resulting in the need to produce Okazaki fragments.
-The two parental strands of DNA are antiparallel and DNA polymerase makes DNA in the 5′ to 3′ direction only.
-It is substantially more efficient to make several shorter strands rather than one longer strand of DNA.
-By having one leading strand and one lagging strand the cell can limit the amount of DNA polymerase used for chromosomal replication.
-There is not enough cellular DNA ligase for bonding Okazaki fragments together if they were produced from both parental strands.
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describe a situation in which migration and natural selection could work in opposition to each other. think about how the net change in allele frequencies is zero
Divergent natural selection's effects on populations typically are countered by migration. It has been shown that the balance between migration and selection limits genetic divergence within populations.
How does allele frequency fluctuate as a result of natural selection?Allele frequency is also impacted by natural selection. The prevalence of an allele will rise if it confers a phenotype that makes a person more likely to live or produce more children.
High rates of gene flow can lessen the genetic divergence between the two groups, increasing homogeneity. Migrants alter the distribution of genetic diversity among populations.
When disrupting variables are absent, gene frequencies tend to stay steady from generation to generation. Mutation, among other things, can alter the natural equilibrium of gene frequencies.
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Water snakes in Lake Erie are an example of how migration and natural selection can work against each other.
What is migration and selection?The movement of genes from one location or population to another is referred to as migration. Migrational selection occurs when certain genotypes migrate more than others. The evidence for migrational selection is examined. Migration can reduce fitness by constraining local adaptation, resulting in a "migration load," which causes persistent natural selection. The movement of populations, groups, or individuals is referred to as migration. Migration allows for gene flow, or the movement of genes from one population to another.Migration causes gene transfer from one population to the next. Migration is also known as gene flow because it involves the transfer of genetic material.To learn more about migration and selection, refer to:
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suppose a young boy is always tired and fatigued, suffering from a metabolic disease. which of the following organelles is most likely involved in this disease? mitochondria golgi apparatus ribosomes lysosomes
Option (A), the mitochondria, is the organelle that is most likely involved in this condition.
What are Mitochondria?Most eukaryotic species contain an organelle called a mitochondrion, which has two membranes.
The primary method through which mitochondria manufacture adenosine triphosphate, a chemical energy source for cells, is through aerobic respiration.
The mitochondria, which are membrane-secure cell organelles (mitochondrion, singular), create the most chemical energy to power the cellular metabolic reactions.
The mitochondria in cells are the mechanisms responsible for converting dietary energy into a form the cell can use.
Each cell contains countless hundreds of thousands of mitochondria.
The mitochondria, which are membrane-bound cell organelles, generate the majority of the chemical energy needed to power a cell's metabolic processes (mitochondrion, singular).
The small molecule adenosine triphosphate serves as a reservoir for the chemical energy produced by the mitochondria (ATP).
Therefore, option (A), the mitochondria, is the organelle that is most likely involved in this condition.
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g which statements describe characteristics of stomata in plants? are cell structures that carry out photosynthesis in plants permit carbon dioxide (co2) to enter and oxygen (o2) to escape from a plant transport sugars produced in the leaves to other parts of the plant are pores enclosed by guard cells that are located on plant surfaces are tubes composed of cells that extend from plant roots to the leaves
The statements that describe the characteristics of stomata in plants are: permit carbon dioxide (co2) to enter and oxygen (o2) to escape from a plant, are pores enclosed by guard cells that are located on plant surfaces.
In the field of science, stomata can be described as structures present inside the leaf surfaces that allow the exchange of water and gases between a plant and the environment. The stomata can also be found in the stems of a plant.
The opening and closing of the stomata occur through the guard cells. When oxygen or water is to be removed from the cell, the guard cells are opened. When oxygen or water is not to be removed, the guard cells remain closed.
Stomata also allow the taking in of carbon dioxide by the leaves that is required for photosynthesis.
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Make a claim- Does meiosis increase or decrease genetic variations?
Answer:
it increases
Explanation:
Phospholipids are found in a limited number of foods. They consists of a glycerol backbone with two fatty acids and a compound that contains phosphate. Why are they important in food and in the body?.
Lipids serve three primary biological functions in the body: they serve as structural components of cell membranes, they store energy, and they serve as important signaling molecules. Triacylglycerols (also known as triglycerides), phospholipids, and sterols are the three main types of lipids.
What is a phospholipid made of?A phospholipid molecule has two hydrophobic fatty acid tails and one hydrophilic phosphate moiety joined together by an alcohol or glycerol molecule . phospholipid form lipid bilayers as a result of this structural arrangement and are an essential component of all cell membranes.Phospholipids are amphiphilic molecules with a glycerol backbone and two hydrophobic fatty acyl tails.Lipids serve three primary biological functions in the body: they serve as structural components of cell membranes, they store energy, and they serve as important signaling molecules. Triacylglycerols (also known as triglycerides), phospholipids, and sterols are the three main types of lipids.To learn more about : phospholipid
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learning is a result of changes in the strengths of synapses. which of the following is an example of something that would increase the strength of a synapse? group of answer choices increase in blood flow increase in the size of the action potentials increase in myelination increase in the number of receptors on the postsynaptic side of the synapse
One example of something that can increase the strength of a synapse is an increase in the number of receptors on the postsynaptic side of the synapse.
Explanation:
A synapse is a meeting point between the axon terminal of one neuron and another. Synapses are formed by swollen axon terminals. Inside the synaptic cytoplasm, there are synaptic vesicles. When the impulse reaches the end of the neuron, the vesicles move, then fuse with the pre-synaptic membrane and release acetylcholine. Acetylcholine diffuses through the synaptic cleft and attaches to receptors on the postsynaptic membrane. The attachment of acetylcholine to the receptor triggers an impulse in the next nerve cell. The enzyme acetylcholinesterase breaks down acetylcholine whose job is done.
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Zara is using a microscope to look at some animal cells on a slide. She knows that there are animals cells on the slide but when she looks through the microscope, she cannot see any cells. List reasons
Answer:
1. The specimen perhaps hasn't been stained so no structures can be seen.
2. If a light microscope, perhaps the light isn't turned on.
3. The specimen may not bein focus
4. Microscope not turned on
5. Not smeared enough to see the specimen
6. Specimen is too thick - diffraction barrier of light microscopes in which light can't focus the specimen - Low resolving power of light microscope.
are examples of naturally occurring biological hazards. a. ddt and dde b. viruses and salmonella c. crude oil seeps and radon gas d. carbon dioxide and nitrogen gas
(b) Viruses and Salmonella are examples of naturally occurring biological hazards.
Biological hazards refer to the environmental threats which are posed by biological agents such as disease or infection causing micro-organisms called pathogens e.g. Viruses and Salmonella are classified as naturally occurring biological hazards.
Viruses are infectious particles. The genetic material of viruses is enclosed within a protein coat i.e. capsid. Salmonella is a rod-shaped bacteria responsible for causing an infection known as salmonellosis in humans.
DDT and DDE, crude oil seeps and Radon gas as well as Carbon dioxide and Nitrogen gas are all examples of chemical hazards that adversely affect human health.
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someone pls help me with this
Answer:
A
Explanation:
Answer:
(a) ATP , Carbon dioxide
which characteristics describe the genetic code of humans? select three options.can help in development of effective medicationscan only help understand human geneticscan help explain genetic diseasescomposed of about 19,000 genescomposed of 23 chromosomes
It can help in development of effective medications, can help explain genetic diseases and composed of about 19,000 genes.
The study of genes, genetic diversity, and inheritance in living things is the focus of the biological field of genetics. The study of genes is called genetics. From one generation to the next, our genes transmit information. The reason one child has blonde hair like their mother and their sibling has brown hair like their father, for instance, is genetic. When a mutation—a negative modification to a gene sometimes referred to as a pathogenic variant—affects your genes or when you have an insufficient amount of genetic material, genetic illnesses result. DNA, also known as deoxyribonucleic acid, makes up genes, which are responsible for your unique traits and the instructions for how cells should work. Genes contain the blueprints for life as we know it. Before you are even born, they have an impact on your growth and have an impact on everything from your personality to your appearance. Your ancestry and your risk for developing particular diseases are both determined by your genes.
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when experimenting with the growth of a plant, a scientist uses three of the same species of plant, two different fertilizers, equal light, and equal water. the scientist performs their experiment for a total of 3 weeks and measures the total height of each plant. in this experiment which would be considered the independent variable?
Plant growth is a dependent variable that is measured. Type of fertiliser is independent (variable).
Because they typically examine the impact of fertiliser, water, and sunlight, this scenario is under control. The latter two ideas offer an explanation for the second portion of the query.
2. It is not a direct thesis and cannot be regarded as a theory because it is frequently backed by hypotheses.
3. By looking at the graph and noting that it depicts the plant expanding, you can determine that the y-axis is measuring the plant's growth
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Answer:
Explanation:
A dependent variable that is measured is plant growth and the independent variable is the fertilizer type.
This situation is under control because they normally look at how fertilizer, water, and sunlight affect things.
The last two hypotheses provide a justification for the second part of the question.
Because it is frequently supported by hypotheses, it cannot be regarded as a theory and is not a straightforward statement.
You can see that the y-axis is monitoring the plant's growth by glancing at the graph and observing that it shows the plant growing.
What factors are present in an experiment on plant growth?
Examples include the amount of water each plant receives, the type of soil the plants are growing in, and the air temperature.
You couldn't be certain that the outcomes happened as a result of the amount of sunlight each plant received if any of these factors changed during the experiment.
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the free energy released by atp hydrolysis can be used to drive endergonic reactions, such as the conversion of glutamic acid to glutamine. as you saw in the video, the synthesis of glutamine from glutamic acid is a two-step process: atp phosphorylates glutamic acid. ammonia displaces the phosphate group, forming glutamine. how does the phosphorylation of glutamic acid (glu) provide energy for the rest of the reaction to occur?
When a phosphate is added to glutamate, a phosphorylated intermediate with higher free energy is created. Thus, the phosphate can be replaced by ammonia in an exergonic process.
What are exergonic reactions?A reaction is considered exergonic if free energy is released during the reaction (for example, during cellular respiration). The line depicts the reaction's progression. The process is slowed down by activation energy (1).
What kinds of reactions are exergonic examples?Exergonic reactions happen on their own (no outside energy is required to start them). Exothermic reactions, such as the combining of sodium and chlorine to create table salt, combustion, and chemiluminescence are examples of exergonic reactions (light is the energy that is released).
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which is structure is correctly paired with its ploidy level? group of answer choices megaspore: diploid microsporangium: haploid megasporocyte: diploid microspore: diploid
The ploidy level is correctly paired with
a. microsporangium: haploid
This is because the microsporangium as a spore is haploid cell but it is derived from a diploid cell.
Here megaspore should be haploid
Microspore: haploid
Megasporocyte: haploid
Hence the correct answer is a. Microsporangium: haploid.
What are the different ploidy levels of an ovule?
The nucellus, a collection of parenchymatous cells, makes up the ovule's body. comparable to megasporangium (2n). A diploid(2n) cell called a megaspore mother cell, also known as a megasporocyte, goes through meiosis to create a linear tetrad of four haploid megaspores (n). The only functional megaspore often found is the chalazal megaspore, with the other three degenerating.
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Which cells, prokaryotes, and eukaryotes, have a cell membrane, and which do not?
1. diamond is concerned about getting all the essential amino acids from her diet. of the 20 amino acids that are commonly found in living tissues, how many of them are considered essential and cannot be made by a healthy adult?
Of the 20 amino acids, the essential amino acids are 9 in number and they cannot be made by a healthy adult.
Amino acids are the structural components that act as monomers for the synthesis of proteins. The common structure present in all the amino acids is composed of an amino group, a carboxylic group, a hydrogen atom and a variable R group, all attached to the common α-carbon.
Essential amino acids are those that cannot be made by the human body itself and are therefore required by an outside source. This source majorly is diet. The names of all the essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
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For which type of lesion would a bandage be most important in order to keep bacteria and other pathogens from entering the body?.
the functional classification of joints is based on the type and degree of movement that they allow. what are the 3 types of joints in the functional classification?
The 3 types of joints in the functional classification are immobile joint, moveable joints and freely moveable joints.
In the field of science, synarthroses can be described as joints that are immovable.
On the other hand, those joints can move slightly and represent slight movement are called amphiarthroses.
Diarthroses can be described as joints that can move freely and completely.
Hence, based on degrees, synarthroses have no movement, amphiarthroses have little whereas Diarthroses have free movement.
Examples of synarthroses are sutures. Example of a diarthrosis is synovial joint and example of amphiarthroses are symphyses.
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small, nonpolar, hydrophobic molecules such as fatty acids easily pass through a membrane's lipid bilayer. very slowly diffuse through a membrane's lipid bilayer. require transport proteins to pass through a membrane's lipid bilayer. are actively transported across cell membranes.
Small, nonpolar, hydrophobic molecules such as fatty acids pass readily through a membrane's lipid bilayer.
The cell membrane, which is selectively permeable and controls the passage of molecules into and out of the cell, facilitates the movement of substances or molecules throughout the cell.
A thin polar membrane composed of two layers of lipid molecules is the lipid bilayer. These membranes are flat sheets that surround all cells and act as a continuous barrier.
A lipid-rich cell membrane will not repel small, nonpolar hydrophobic molecules like fatty acids, so they enter the cell through simple diffusion. This indicates that they easily and without assistance penetrate the lipid bilayer of a membrane. Because they are a class of lipids and soluble in the lipid layer of the cell membrane, fatty acids are able to pass through the lipid-bilayered membranes easily.
Small, nonpolar hydrophobic molecules such as fatty acids
a. pass readily through a
membrane's lipid bilayer
b. diffuse very slowly through the lipid bilayer
c requires special channels to enter a cell
d. are actively transported across cell membranes
c. must enter the cell via endocytosis
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What makes plants wilt?
A. A lack of motility that would usually come from the nucleus
B. A lack of stablity that would usually come from the ribosomes
C. A lack of turgor pressure that would usually come from water stored in the central vacuole
*Brainliest* Plsss the correct answer :) TY
Answer:
I think the answer is C
Explanation:
Sorry if I'm wrong.
Answer: B
Explanation: Dehydration
sean is performing barbell squats with the intent of building up his quadriceps muscles. to make the quadriceps perform more work and increase the efficiency of the exercise, he should:
To make the quadriceps perform more work and increase the efficiency of the exercise, Sean should minimize the amount of trunk flexion at the start of the concentric phase.
We can describe trunk flexion as forward pelvic tilt and flexion of the spine. This activity causes more pressure on the muscles of your quadriceps and hence helps in building them.
The quadriceps can be described as the muscles that are present in the front region of the thigh. These area has more muscle mass as compared to other areas of your brain and hence need to be worked on so that the muscle mass here can be reduced.
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The tendency to respond to a conditioned stimulus that is similar, but not identical, to the original conditioned stimulus is called _____.
The tendency to respond to a conditioned stimulus that is similar, but not identical, to the original conditioned stimulus is called Stimulus generalization.
Stimulus generalization is the capacity to react in a new situation using a strategy learned in previous, comparable situations. The difficulty lies in determining which aspects of the learning circumstances ought to be applied to all circumstances.
The phenomenon is known as stimulus generalization when an organism's response that was conditioned by one stimulus can be elicited by another stimulus with the same properties. A stimulus that has the potential to elicit a conditioned response is known as a conditioned stimulus. In the experiment that has been described, the ringing of the bell served as both the conditioned stimulus and the conditioned response. It is essential to comprehend the transformation of the neutral stimulus into the conditioned stimulus.
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How would a forensic scientist MOST accurately describe the chemical properties of a cup of gasoline?
OA. It is liquid and weighs two pounds.
OB.
It catches fires when lit with a match.
OC. It is slightly brownish in color.
OD. It is not very dense.
Answer: A. It is liquid and weighs two pounds.
Explanation:
A provides the most details and includes a quantitative measurement however an actual cup of gasoline does not weigh 2 pounds.