Geologic time scale related to the fossil record with the timing of the emergence and disappearance of widespread species from the being used to delineate the beginnings and endings of ages, epochs, periods, and other intervals.
Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
The geological time scale is based on the the geological rock record, which includes erosion, mountain building and other geological events. Sediment has to cover an organism's remains in order for the long fossilization process to begin. Most organisms decompose before this can happen.
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(30)Can an organism with a homozygous dominant genotype have an offspring with the recessive phenotype? Explain your answer
(in depth explanation pls ;-;)
No, an organism with a homozygous dominant genotype cannot have an offspring with the recessive phenotype because when crossed with hetero/ homozygous , the offspring will contain a dominant allele.
What is a genotype?An individual's genotype, often known as their genetic make-up, refers to the genes that are responsible for a set of characteristics or qualities that are manifested in that individual.
The phenotype is the outward manifestation of how a gene is expressed. The phenotype is the sum total of all the genes in an individual that are either expressed or can be observed in their physical form.
It is only possible for the phenotype associated with recessive alleles to be expressed in an organism if that organism possesses two copies of the recessive allele, making it homozygous for the recessive allele. This indicates that the genotype of an organism that possesses a dominant phenotype might either be homozygous for the dominant allele or heterozygous for the dominant allele.
Therefore, an organism with a homozygous dominant genotype cannot have an offspring with the recessive phenotype.
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In the gluteus maximus, each motor unit controls a _____________ amount of muscle fibers than a motor unit in the eye muscles.
In the gluteus maximus, each motor unit controls a greater amount of muscle fibers than a motor unit in the eye muscles.
The primary hip extensor muscle is the gluteus maximus. It is the largest of the three gluteal muscles which determines the shape of the hips. Eyes need to move with precision and with a high level of control, which is made possible by the fact that there are fewer muscle fibers connected to each neuron. This is the reason why motor unit in gluteus maximus controls a greater amount of muscle fibres than the eye.
Smaller, lower threshold motor neurons in the muscle's small motor units will be more excitable and will fire first to their skeletal muscle fibers, which also tend to be the smallest. This is how eyes work efficiently. On the other hand, limbs requires greater amount of movement and thus have a larger muscle.
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When an experiment is repeated and the new results are different from the original results, what could you assume to be true?
The original experiment may be inaccurate and further experimentation is needed.
The accuracy of measurements depends on the quality of the measuring equipment and the skill of the scientists involved. For the data to be considered reliable the variability of the values should be small. Repeated scientific research increases credibility. Results may change over the course of different studies or under different conditions.
It is therefore important that the experiment itself is reproducible. A reproducible experiment should but need not give the same results when performed by different people at different times and preferably under similar conditions. Repeating an experiment multiple times can help determine whether the data are random or normal. Avoid jumping to conclusions without sufficient evidence.
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interrupting the night with a flash of light can trigger flowering in a long-day plant. why doesn't introducing a short period of darkness during the day cause a short-day plant to flower?
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What is an advantage to the longer duration of cardiac action potential compared to the skeletal muscle action potential?.
Tetanic contraction is avoided by the longer duration of cardiac action potential, allowing the heart chambers to relax and fill with blood before the next contraction.
Compared to skeletal muscle, the refractory period of cardiac muscle is significantly longer. This avoids tetanus and guarantees that there is adequate time between each contraction for the heart chamber to fill with blood before the next one. Accordingly, cardiac muscle is benefitted with the longer duration of its action potential.
Similar to skeletal muscle, the influx of sodium ions results in an initial depolarization; however, the depolarization in cardiac muscle is sustained for a longer period of time thanks to the influx of calcium ions.
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If you pinch your nose while you are putting a piece of food into your mouth, what are you going to experience?.
If you pinch your nose while putting food in your mouth, you may experience lack of taste in the food.
It did appear that smell had an impact. However, the ability to taste was not completely impaired by nose plugs. Chewing certain foods allows aromas to reach the nose through the back of the mouth even when the nostrils are closed because the nose and throat share essentially the same airway.
Molecules from your food travel up your throat to the olfactory epithelium, where they activate odor receptors, when you eat.
Retronasal olfaction, as opposed to orthonasal olfaction, which occurs when you sniff through your nose, is prevented by pinching your nose. Retronasal olfaction is very important to your sense of flavor, which many other people mistake for "taste.", we can demonstrate this with jelly beans: you can still taste the sweetness of the jelly bean by pinching your nose, but you can't tell the difference between a strawberry and a grape. One of the most common complaints made by people who have lost their sense of smell is that food no longer "tastes" good because it lacks a lot of flavor.
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The purpose of the Calvin Cycle is to…
A. convert sugar into cocoa puffs cereal that Mrs. Wade loves to eat
B. convert carbon dioxide in the atmosphere into carbohydrates or sugars
C. convert carbon dioxide in the atmosphere into pizza that Ms. Vetter likes to eat.
D. convert carbon dioxide into oxygen using water
Answer: B.
Explanation:
Answer: B, the purpose of Calvin Cycle is to produce three carbon sugars.
Explanation:
A nutrition facts label lists total fat as 10 grams and saturated fat as 4 grams. How many calories does fat provide?.
90 calories is the amount of calories does the fat consisting of total fat as 10 grams and saturated fat as 4 grams.
One of the six nutrients your body requires to be healthy is fat. Calories are produced by proteins, lipids, and carbohydrates. Protein and carbohydrates both contain 4 calories per gram. There are 9 calories in 1 gram of fat.
Similar to a teaspoon or an inch, a calorie is a unit of measurement. Calories are the units of energy used by your body during food digestion and absorption. A meal might provide your body extra energy if it has more calories. Knowing that there are 9 calorie per 1 gram of fat:
Total calories = 10 grams of fat x (9 calories/1 gram of fat)
Total calories = 90 calories
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a population of mockingbirds has an annual per capita birth rate of 0.08 and an annual per capita death rate of 0.03. calculate an estimate of the population change for a population of 2,000 birds in one year. give your answer to the nearest whole number.
The population change for a population of 2000 birds in one year is positive and The number of individuals added is 100
Births, deaths, and migration are the primary drivers of population change. The difference between live births and deaths is what is meant by "natural increase. "The difference between the number of people moving into a region and the number of people moving out is called "net migration."
As the annual per capita birth rate is 0.08 and the annual per capita death rate is 0.03, the final number of live individuals per capita will be
0.08-0.03 = 0.05
The total population is 2000, and the number of individuals added will be
0.05*2000= 100
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Labeling the human Skeleton system and labeling nervous system
Completed! Finnnnnnnnn
A student is performing a chemical analysis of xylem sap. This student should not expect to find much _____.
A student is performing a chemical analysis of xylem sap. This student should not expect to find much sugar.
The plants contain two vascular bundles which are referred to as the phloem vascular bundle and the xylem vascular bundle. The xylem and the phloem flow across a plant.
The phloem is the vascular bundle that is responsible for the transportation of food from the leaves to all other parts of the plant.
The xylem is the vascular bundle that is responsible for the transportation of water from the roots to all the parts of the plant.
Hence, the food 'sugar' will not be found in the xylem sap as it will contain water. Sugar will be found in the phloem.
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susan is a consultant for a grocery store chain that wants to open several new stores in the st. louis area. she has selected several sites for the company to consider based in part on projected population growth near those sites. what isolating mechanism does this best illustrate?
The isolating mechanism which best illustrates Susan's consultancy is better expectations of future resource value.
Susan is making an investment in future value thus, the company can gain a competitive advantage by having better expectations of a resource's future value. A company can gain a long-term competitive advantage by consistently setting higher expectations over time.
Isolating mechanism: A steady stream of economic profits and the persistence of intra-industry firm differences over time are both explained by isolating mechanisms, which are also referred to as barriers to imitation (Mahoney and Pandian, 1992). Similar to entry barriers and mobility barriers, isolating mechanisms operate on different levels.
Barriers to imitation that prevent a company from competing are:
1. Better expectations of the value of future resources—investment in future value
2. Path dependence—the options faced are limited by past decisions;
3. Causal ambiguity—the cause and effect of a phenomenon are not readily apparent
4. Social complexity—the interaction of various social and business systems and
5. Intellectual property (IP) protection—a critical intangible resource that can serve as a powerful isolating mechanism. The main types are Trade secrets, designs, patents, copyrights, and trademarks.
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the vo2max provides a quantitative measure of a person's capacity for . . . group of answer choices anaerobic glycolysis aerobic atp resynthesis maximum lactate production none of the above
The correct answer is Aerobic ATP resynthesis.
What is vo2max ?
vo2max is the measurement of maximum amount of oxygen our body uses during exercises. Here, v represents volume, o2 is oxygen and max represents maximum.
What is Aerobic ATP resynythesis ?
It is the process of converting energy into Adenosine Triphosphate(ATP) by using oxygen present in blood. It occurs in mitochondria.
Therefore, vo2max provides a quantitative measure of a person's capacity for Aerobic ATP resynythesis.
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One of the difficulties of Earth science is that
Answer: A
Explanation:
after electrophoresis dna fragments through an agarose gel, you examine the dna band that is closest to the positive electrode. how does this dna fragment compare to the others on the gel?
This DNA fragment is smaller as compared to others.
In the field of science, gel electrophoresis can be described as a technique by which DNA fragments are separated based on their charge-to-mass ratio.
Those DNA fragments that are smaller will move faster as compared to the larger ones. This is because the charge on each DNA fragment will be the same but the smaller DNA fragments will be able to move faster.
Hence, the DNA band that is closest to the positive electrode will be able to travel faster as compared to others.
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which of the following does not occur due to the effects of aging on the joints? select one: a. decreased range of motion b. decreased flexibility and elasticity c. increased production of synovial fluid d. weakening of muscles e. decreased tissue repair
Increased production of synovial fluid does not occur due to the effects of aging on the joints
Bones do not directly touch one another in a joint. They are padded by articular cartilage, which lines your joints, synovial membranes around the joint, and lubricating fluid inside your joints (synovial fluid). The amount of lubricating fluid inside your joints diminishes as you aging, and the cartilage gets thinner, making joint movement stiffer and less flexible. Joint stiffness is also often caused by the tendency of ligaments to shorten and lose some flexibility.
Lack of exercise is a major contributor to many of these joint changes that come with ageing. The fluid is kept moving by joint movement and the corresponding "stress" that comes with it. The cartilage contracts and stiffens with inactivity, decreasing joint mobility.
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Biologists conclude that sardine fish form tight clusters
called "bait balls, such as the one shown in the image,
because this behavior protects them from predators.
8
Answer:
that's cool
never knew
Anyways thanks
The statement; "Biologists conclude that sardine fish form tight clusters called "bait balls, such as the one shown in the image, because this behavior protects them from predators." is true
What are the predators?Bait ball behavior is not limited to sardines; other small schooling fish, such as herring, anchovies, and mackerel, also exhibit similar clustering behaviors for similar protective reasons. The formation of bait balls is a remarkable example of collective behavior in the animal kingdom and serves as a vital survival strategy for these small fish species.
Biologists have observed that sardine fish (and other small schooling fish) form tight clusters known as "bait balls" as a defense mechanism against predators.
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Missing parts;
Biologists conclude that sardine fish form tight clusters
called "bait balls, such as the one shown in the image,
because this behavior protects them from predators.
T/F
Describe how molecules enter and leave a cell WITHOUT the use of energy.
Answer: In simple diffusion, small noncharged molecules or lipid soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of high concentration to areas of low concentration (they move down their concentration gradient).
Explanation:
Answer this question and ill mark
Answer: D. Data demonstrating a relationship between the amount of sun exposure and incidences of skin cancer.
Explanation:
Going through the other answers,
A doesn't seem logical as it only shows the location of DNA in a cell, which has nothing to do with inferencing the sun.
B also doesn't make sense since corelation[tex]\neq[/tex]causation. Just because someone had sunburns as a child doesn't mean they'll develop skin cancer.
C is also not the answer because many companies advocate that their products protect skin against UV rays, however Ultra-Violet radiation from the sun is hard to defend against.
Therefore, the answer is D since the amount of Sun exposure is usually a direct cause of skin cancer.
genetic information of plants, animals, bacteria and many viruses is stored in deoxyribonucleic acid polymers (dna). the backbone of the polymer is a made up of the phosphorylated carbohydrate ribose with one less oh group on it. based on what you know about amino acid properties and the charge of phosphates at physiological ph what amino acids would be best at binding dna? group of answer choices positively charged ones like k and r negatively charged ones like d and e uncharged polar ones like t and c nonpolar ones like a and g
Amino acids best at binding DNA are positively charged ones like k and r as DNA is negatively charged which will bind more effectively with positively charged amino acids.
Amino acids are natural compounds that contain both amino and carboxylic corrosive useful bunches.
Even though hundreds of amino acids exist in nature, by distance, the foremost critical are the alpha-amino acids, which include proteins. As it were 22 alpha amino acids show up within the hereditary code.
Lysine and arginine are essential amino acids since their side chain bunch contains a full positive charge at the physiological ph. Histidine is additionally considered essential, but it can have a positive or an impartial charge on its side chain gathered at the physiological ph.
Among the 20 common amino acids, five have a side chain that can be charged. At pH=7, two are negatively charged: aspartic corrosive (Asp, D) and glutamic corrosive, and three are positively charged: lysine, arginine, and histidine (His, H) (fundamental side chains).
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the value of psi in root tissue of a plant has been found to be 4.6 bars. if you place this root tissue in a 0.2m sucrose solution at 20 c in an open beaker. what is the psi of the solution? which direction will the net flow of water be?
Water potential is calculated using the formula = S + P. The relationship between osmotic potential and solute concentration is direct. The likelihood that water in a solution may undergo osmosis reduces as a solution's solute concentration rises.
What is the potential of water?Water potential is higher in pure water. Purified water's water potential has traditionally been set at zero. This implies that any solution's water potential will always be negative.
The value of base water potential begins to decline at a temperature increase of 5 to 20 °C, whereas base water potential begins to grow at a temperature increase of 20 to 40 °C.
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. what is the stage of cell division in a diploid organism if you see seven chromosomes, each consisting of a pair of sister chromatids? mitosis prophase mitosis anaphase meiosis i anaphase meiosis ii prophase
The stage of cell division in a diploid organism if you see seven chromosomes, each consisting of a pair of sister chromatids meiosis II prophase. Option D.
Diploid cells have two complete sets of chromosomes. Most human cells are diploid and composed of 23 pairs of chromosomes for a total of 46 chromosomes. These are 22 pairs of autosomes and 1 pair of sex chromosomes. During telophase, sister chromatids become daughter chromosomes. Mitosis has five main stages prophase metaphase anaphase telophase, and cytokinesis.
Meiosis is the process by which diploid cells become haploid cells. The difference between haploid and diploid cells is that haploid cells contain one complete set of chromosomes, while diploid cells contain two complete sets of chromosomes. Meiosis involves the division of the diploid parent cell. When mitosis is complete, cells have two sets of 46 chromosomes, each surrounded by its own nuclear membrane.
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pls help once i finish this i can sleep!!!!
Identify the brain stem in the diagram below.
C
A
D
B
The answer is A.
I wish you a restful sleep.
A chemical that is toxic to snakes is accidentally released into this ecosystem.
The snakes are poisoned, sharply (dramatically) decreasing the number of snakes.
1. What will happen to the population of insects (bugs)?
2. What will happen to the population of grass ?
3. What will happen to the population of Cougars?
If snakes number will decrease then population of insects will increase. Grass population will decrease. The population of Cougars remains the same.
What is ecosystem?
An ecosystem is a place where plants, animals, and other organisms interact with the environment, weather, and other variables to form a bubble of life. In ecosystems, biotic and abiotic factors—or nonliving components—coexist.
Biotic factors include plants, animals, and other species. Abiotic factors include rocks, temperature, and humidity. Each element of an ecosystem depends on every other element, either directly or indirectly.
The kinds of plants that may thrive there, for instance, are influenced by the regular temperature variations that occur in an ecosystem.
Therefore, If snakes number will decrease then population of insects will increase. Grass population will decrease. The population of Cougars remains the same.
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Which organism from the video is the least useful for relative dating?
answer: scallop
this is possibly because scallops are still common vs. any other option that was prehistoric [ferns, trilobite, dino, sycamore leaf]
The organism that is least useful for the process of relative dating: scallop.
Relative dating is a technique or method in Geology that is deployed in order to ascertain the relative sequence of events that have occurred in the pasts. Relative dating is helpful as it can tell about the relative order of past events without the estimation of their absolute age. Relative dating techniques help in determining the relative age of a particular item of interest in comparison to other objects found at a particular site.
The question is incomplete. The complete question is:-
Which organism from the video is the least useful for relative dating?
Hints:-
sycamore leaf
scallop
dinosaur
fern
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what medical technology have some chinese chosen to pursue in order to increase the possibility of multiple children in a single pregnancy
The use of fertility drugs is the technology used by some Chinese that can increase the possibility of multiple children in a single pregnancy.
Fertility drugs are the medications that serve various functions like production of eggs or sperms, or their quality. Some drugs can speed up the growth and maturity of egg cells, resulting in the release of more than one egg cell at the same time. This is how multiple children are born from a single pregnancy.
Pregnancy is the stage when the fusion of the male and female gamete happens and the fetus develops inside the body of the mother. For humans, this time period is of 9 months.
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explain how the fluidity of the plasma membrane is maintained by the presence of unsaturated fatty acids and cholesterol. describe an adaptation used by organisms in cold environments to maintain a fluid membrane.
Unsaturated fatty acids increase the fluidity of membrane and cholesterol brings stability to the cell membrane.
What is plasma membrane and how is it maintained by the presence of unsaturated fatty acids?Plasma membrane is the membrane outlines the cell separating the interior of the cell from the outside environment.Unsaturated fatty acids increases the fluidity of the plasma membrane and helps to maintain the fluidity for long.Likewise cholesterol have a great significance in the fluidity of the membrane too, as it brings stability.Plasma membrane is same as cell membrane , as it outlines the cell and is selective permeable.Cholesterol stabilizes the plasma membrane helps to maintain the fluidity.To know more about plasma membrane visit:
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Define and give an example of : a. Genotype: b. Homozygous c. Heterozygous d. Phenotype
a) Genotype: The genetic composition of an organism is its genotype. The alleles or variations that an individual carries in a specific gene or genetic region are also referred to as the genotype.
Eg: RR,Rr,rr can be the genotype of the color of a flower.
b) Homozygous: It is a gene region where there are two identical alleles present. Two alleles with the same variation or two alleles that are normal can both be present in a homozygous genotype
Eg: BB is the homozygous gene for a dominant character like brown eyes in humans.
c) Heterozygous: It is a gene region where there are two distinct alleles present. One normal allele and one mutated allele, or two distinct mutated alleles, can make up a heterozygous genotype.
Eg: Bb is the heterozygous gene for brown eyes in humans.
d) Phenotype: It describes a person's observable characteristics. Both a person's genomic makeup (genotype) and environmental circumstances affect their phenotype.
Example: Color of human eyes like brown, blue, black
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most aec consoles permit activation of a. all three cells simultaneously. b. all three cells in any combination. c. the outer cells when the center cell is inactivated. d. the center cell and either outer cell.
Most AEC (Automatic Exposure Control) consoles permit activation of (b) all three cells in any combination.
An Automatic Exposure Control (AEC) console is a tool that is found on most of the advanced radiographic units. It helps the radiographer in ascertaining the radiation exposure (in terms of quantity) in order to create a quality image.
An AEC console is deployed to regulate invariably the quantity of radiation approaching the image receptors by terminating the length of exposure. Automatic Exposure Control (AEC) consoles are also known as automatic exposure devices. These consoles are exceptionally good at producing persistent levels of exposure if utilized accordingly.
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Animals aresingle or multicellular?
Answer:
Animals are multicellular