Answer:
Mechanical digestion is a purely physical process that does not change the chemical nature of the food. Instead, it makes the food smaller to increase both surface area and mobility. It includes mastication, or chewing, as well as tongue movements that help break food into smaller bits and mix food with saliva.Explanation:
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Which of these is not an example your body maintaining homeostasis?
A-When exercising, your body releases more energy to your muscles.
B-On a hot summer day, you produce sweat.
C-When you get a virus, your body systems react to fight it.
D-When you see a piece of cake, your mouth waters.
Answer:
D. When you see a piece of cake, your mouth waters.
How many seconds would it take DNA polymerase to replicate one set of human chromosomes (6,000,000,000 bytes long)
The typical human chromosome has about 150 million base pairs that the cell replicates at the rate of 50 pairs per second.
What is chromosome ?A chromosome is a thread-like structure present in the nucleus of cells such as plant, animal and human cells and it is made of a molecule of DNA (Deoxyribonucleic acid) and histone proteins.
It is composed of three components, DNA, proteins and RNA, amount of the DNA content ranges from 30 to 40 %, the amount of proteins from 50 to 65%, and small amount of RNA from 1 to 10%.
Two types of protein present in DNA such as histone and non-histones proteins, histone constitute large amount (90% of total protein), whereas non-histone is present in small amount (around 10% of total protein).
The histone protein is basic, whereas, the DNA is acidic, so it can be neutralized; DNA in chromosome is present in two forms such as Euchromatin and Heterochromatin.
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1
In (mutualism, parasitism,commensalism) both organisms benefit.
Answer:
Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.Do Grocery stores sell toothpaste cost?
Answer:
Yes they do sell toothpaste in grocery store because toothpaste is a essential thing we use in our daily life. The cost may vary from shop to shop. So we can not tell the cost of the toothpaste accurately.
Explanation:
Answer:
english please that made no sense but yes i do believe that stores sell toothpaste
Explanation:
Pathogens that do not usually cause disease unless the host's immune system is weakened or compromised in some way are known as _________ pathogens.
PLEASE HELP ME IM TIMED!
Answer:
Prokaryotic and anaerobic
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throughout the ___________, a healthy dietary pattern can help minimize diet-related chronic disease risk.
Answer:
pregancy
Explanation:
Throughout the life, a healthy dietary pattern can help minimize diet-related chronic disease risk.
What are chronic diseases?Chronic diseases are those who required long term treatments.
Examples are cancer, heart diseases, diabetes, or any disability.
These diseases need treatments in phases or sometimes the treatment is lifetime.
To avoid chronic diseases, we should follow a healthy lifestyle.
Thus, the fill in the blank is life.
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What is a muscle group that performs opposite functions called?
Answer:
b. Antagonistic muscles
Explanation: is correct
gene expression is determined by several factors, including
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Answer:
Chemicals in the body of a living organism is one of the many factors determined in gene expression.
Explanation:
The presence of drugs and/or chemicals in a living organism's environment, this can also influence gene expression in the organism.
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Expressivity can be impacted by a number of elements, such as genetic make-up, exposure to dangerous chemical substances, other environmental effects, and age.
What are the factors that affect gene expression?The level of transcription is where the majority of control over gene expression is exerted, and this is mostly due to the fact that proteins bind to certain locations on DNA.
It is possible for environmental elements such as nutrition, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens to have an effect on which of an animal's genes are expressed, which in turn has an effect on the animal's phenotype.
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(compound microscope)
1. Put a table lamp in front of the?
2. Put a low-power (, e.g., x5) ________into
the microscope.
3. Rotate a low-power (e.g., x4)
______________into position.
4. Look through the eyepiece. Adjust the __________________ until you see a bright circle of light.
5. Place a slide on the _________, and fix it with the __________. The ___________ on the slide should be right above the hole of the stage.
6. Look at the microscope from the side. Turn the ______
carefully to lower the objective until it is very close to the ________.
7. Look through the eyepiece. Turn the coarse
adjustment knob to raise the objective slowly until
you can see an __________ of the specimen.
7. Turn the ________ to get a sharper image. The image is now in focus.
Choices: microscope, eyepiece, objective, coarse adjustment knob, slide, specimen,
mirror, stage, clips, fine adjustment knob, image
In this exercise it is necessary to fill the gaps with the correct given word. So, the right order of words will be:
1. microscope
2. eyepiece
3. objective
4. mirror
5. stage
6. clips
7. specimen
8. coarse adjustment knob
9. slide
10. image
11. fine adjustment knob.
So, after filling all the gaps, the text and, consequently, the final answer will be:
1. Put a table lamp in front of the microscope.
2. Put a low-power (, e.g., x5) eyepiece into the microscope.
3. Rotate a low-power (e.g., x4) objective into position.
4. Look through the eyepiece. Adjust the mirror until you see a bright circle of light.
5. Place a slide on the stage, and fix it with the clips. The specimen on the slide should be right above the hole of the stage.
6. Look at the microscope from the side. Turn the coarse adjustment knob
carefully to lower the objective until it is very close to the slide.
7. Look through the eyepiece. Turn the coarse adjustment knob to raise the objective slowly until you can see an image of the specimen.
8. Turn the fine adjustment knob to get a sharper image. The image is now in focus.
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What type or piece of material culture do you think gives the most information about your society? Why?
Match the vocabulary word with the proper definition.
Definitions
_____ 1. organism that has cells containing a nucleus and other organelles
_____ 2. an organelle inside eukaryotic cells where the DNA is located
_____ 3. cell without a nucleus
_____ 4. a structure within the cytoplasm of a cell that is enclosed within a membrane and performs a specific job
_____ 5. phospholipid bilayer that surrounds and encloses a cell
_____ 6. first person to use the word “cell”
_____ 7. tiny, non-living particles that may cause disease
_____ 8. the material inside the plasma membrane of a cell
_____ 9. cell that contains a nucleus and other organelles
_____ 10. organelle where proteins are made
_____ 11. discovered human blood cells
_____ 12. a single-celled organism that lacks a nucleus
Terms
a. Anton van Leeuwenhoek
b. cytoplasm
c. eukaryote
d. eukaryotic cell
e. nucleus
f. organelle
g. plasma membrane
h. prokaryote
i. prokaryotic cell
j. ribosome
k. Robert Hooke
l. virus
Answer:
1) Eukaryotic Cell
2)Nucleus
3)Prokaryotic cell
4)organelle
5)Plasma membrane
6)Robert Hooke
7)Virus
8)cytoplasm
9)Eukaryote
10)Ribosom
11)Anton van Leewenhoek
12)Prokaryote
Define negative feedback in biology
Answer:
A negative feedback loop occurs in biology when the product of a reaction leads to a decrease in that reaction. In this way, a negative feedback loop brings a system closer to a target of stability or homeostasis
Explanation:
Negative feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances
A student is conducting an experiment with biochemical reactions and notices that at high temperatures, the reaction rate decreases significantly.
Which statement best explains the decrease in reaction rate?
The bonds of the substrate were breaking.
The enzyme bonded with the substrate.
The enzyme denatured and changed shape.
The activation energy was increasing.
Answer:
The enzyme denatured and changed shape
Explanation:
Enzymes are proteins, which can only function properly within a certain range of temperatures- when things get too hot, proteins undergo a structural change and are considered to be 'denatured'. This means that enzymes will not be able to function properly under those high temperatures, because the substrate bonding site would no longer be the right shape for said substrate.
The statement best explains the decrease in reaction rate is the enzyme denatured and changed shape. Thus option 3 is correct.
What are enzymes?Enzymes are defined as a material that functions as a catalyst in living things, controlling the pace at which chemical processes take place without changing the substance itself.
There are six types of enzymes.
HydrolysesOxidoreductaseLyasesTransferaseLigasesIsomeraseThe functions of enzymes are:
In human bodies, enzymes facilitate metabolic reactions. From breathing to digestion, they support.Health issues might result from having a too amount or too little of a certain enzyme. To help their bodies function as they should, certain persons with chronic diseases may need to take enzyme supplements.Thus, the statement best explains the decrease in reaction rate is the enzyme denatured and changed shape. Thus option 3 is correct.
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Along one side of a DNA molecule, the nucleotides are connected to each other by ________ bounds between _______
Answer:
Nucleotides are joined together by covalent bonds between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar in the next nucleotide.
Explanation:
Along one side of a DNA molecule, the nucleotides are connected to each other by covalent bonds between the phosphate group pf one nucleotide and the third carbon atom of the pentose sugar (deoxyribose sugar) in the next nucleotide.
How nucleotides are arranged in DNA?Two nucleotides are attached via a phosphodiester bond to form dinucleotide. Another nucleotides are added in same manner to form polynucleotide chain.
In this polynucleotide chain, the nucleotides are connected to each other by covalent bonds between phosphate group of one nucleotide and third carbon atom of deoxyribose sugar and forms a phosphate backbone of DNA.
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Give an example in which you control temperature to influence a chemical change.
Answer:
100* farenhights
Explanation:
Someone who needs to import wildlife species for scientific research would need to consult the _____ to determine the regulations on moving that species across international borders.
The individual should approach the U.S. Fish and Wildlife Service’s International Affairs Program, in other to determine the regulations on moving that species internationally.
This program through coordinated efforts; protect, restore, and enhance the world’s diverse wildlife resources both domestically and internationally but with a greater focus on international species.
There are different categories of wildlife species based on their abundance and distribution. Some are regarded as foreign endangered and threatened species. And the need to protect these species is priceless.
That's why the import/export of these scarce species is regulated and restricted by laws and legislation.
For whatsoever reason, the U.S. Fish and Wildlife Service’s International Affairs Program should be consulted to determine the movement of these species.
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once the food is swallowed, it passes throught the what
Answer:
esophagus
Explanation:
Once food is swallowed, it passes through the esophagus into the stomach
look at the picture below. what word describes what is happening to the nutrients and water in the biome?
Given what we know about the water cycle we can confirm that the process that happening in the biome is the process of condensation
Although the water cycle can be divided and subdivided into various processes, we can simplify it into four simple steps:
EvaporationCondensationPrecipitation CollectionThe one saw in the biome and one of the most essential parts of the cycle is condensation. It is the collection of water molecules into a single group that, when dense enough, fall back onto the earth as rainfall. In nature these take the form of clouds, meanwhile, in the biome, they appear as water on the sides of the container.
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Answer:
recyled
Explanation:
Which molecule binds NMDA receptors and prevents the flow of ions at resting and hyperpolarized membrane potentials
Answer:
it is in the cell
Explanation:
Which of the following is true of gravity?
1 it is a pulling force
2 it holds objects in orbit
3 it is a bending of space
4 it can alter the path of light
5 all of the above
Answer:
5. All of the above
Explanation:
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PLEASE HELP ME IM TIMED!
Answer:
Its Only, Oxygen, Nitrogen, and ammonia.
Explanation:
Hope that helped.
Which of the following statements is TRUE?
If you have minor symptoms of PID, you do not need to be treated.
PID always causes severe pain.
*PID can result in having problems getting pregnant later in life.
PID occurs in males.
Answer:
c. PID can result in having problems getting pregnant later in life.
Explanation: is correct. post protected
(ii) Two grey mice, when mated, produced a total of 8 white, 9 black and 17 grey offspring. Student A suggested that grey coat colour was dominant in the mice. Student B strongly disagreed Which student is right? Explain your answer using appropriate symbols (4 marks)
what is true of a fossil that is classified as a transitional form?
Given our understanding of the situation, we can confirm that a fossil classified as a transitional form, will show characteristics both of its ancestors and of the descendants that derived from it.
Transitional fossils are just that, fossilized remains of a transitional phase of evolution. What this means is that as species evolve, there will always be a point in time where a species is at a halfway point in between the species from which it comes, and the species that it will become.
These fossils, due to being a halfway point, will have characteristics that belong to their ancestors, but also characteristics that belong to their descendants, which is only logical considering that evolution is a process that spans many generations, not something instant.
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___________1. Variety of species and abundance of species
___________2. Refers to the heterogeneity present in the world or a habitat,
ranging from macromolecules within the cells to biomes
___________3. Plant or animal that exist in small numbers
___________4. It is the loss of species
___________5. Species in danger of extinction
___________6. Number of different species present in an ecosystem
___________7. Relative abundance of individuals of each of those species
___________8. Refers to the role of that a species play in its ecosystem
___________9. They serve as biological smoke alarms
__________10. The world’s largest coral reef
__________11. Also known as the four major causes of loss of diversity
__________12. The process during which a large expanse of habitat is
transformed into a number of smaller patches of smaller
total area
__________13. Species that are introduced accidentally or intentionally
__________14. Also called overharvesting
__________15. They have broad niches
when do alleles for two different genes—located in two different chromosomes—segregate?
Aupporting cells of the nervous system are collectively called:
Supporting cells of the nervous system are collectively called neuroglia.
Answer:
They are called neuroglia or glial cells.
What is the term describing the process that occurs when a species evolves into a new species without a physical barrier separating populations?
Answer:
Sympatric speciation should be correct.
Explanation:
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what is the electron transport chain
Answer:
The electron transport chain is a cluster of proteins that transfer electrons through a membrane within mitochondria to form a gradient of protons that drives the creation of adenosine triphosphate (ATP).
Explanation:
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