Answer:
It is an essential vitamin for vertebrates, including humans. Vitamin A (retinol) and its metabolites serve as essential molecules in vision and influence gene expression in various types of cells, particularly epithelial cells.
Explanation:
Strep throat and bacterial pneumonia are examples of __________.
Answer:
Bacterial communicable diseases
Explanation:
Hope it's right
Answer:
communicable diseases
Explanation:
Help me please do this
Answer:
I believe the anwser is 75%
Explanation:
If both parents which i am assuming they are Bb we can do a punnet square.
B b
B BB Bb
b Bb bb
So 75% of the offspring would be Heterozygous Dominant while 25% of the offspring would be Recesive.
Hope this helps! (If i am incorrect please let me know)
How could you determine whether two groups of organisms that live in two different parts of the world were members of the same species, according to the biological species concept
Answer:
organisms belong to the same biological species if they can interbreed and produce viable fertile off springs
What are some of the implications of Directed Evolution?
Answer:
Adaptive laboratory evolution selects many genome-wide mutations that contribute to the fitness of actively growing cultures, whereas directed evolution typically targets a specific gene for mutagenesis and then screens the resulting variants for a phenotype of interest, often independent of fitness effects.
Explanation:
Answer:
Directed evolution is the laboratory process by which biological entities with desired traits are created through rounds of genetic diversification. It can also be created through library screening or selection and has become one of the most useful tools in basic biology. It's role includes improving the stabilities or biochemical functions of proteins by repeated rounds of mutation and selection.
More simply said, directed evolution is a mimic of the natural evolution cycle in a laboratory setting.
It has indirectly revealed that single amino acid mutations can enhance properties such as catalytic activity or stability and that adaptation can often occur through pathways consisting of beneficial mutations.
_______ flow inward to the central nervous system from sensors in the periphery, while _______ flow outward from the central nervous system to the periphery.
afferent signals flow inward to the central nervous system from sensors in the periphery, while efferent signals flow outward from the central nervous system to the periphery.
What is the reflex arc?The reflex arc refers to the sequence of events since the body receives external stimuli until it reacts to it.
In general terms,
1. a stimulus of varying nature reaches the body,
2. the peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-.
3. The CNS processes the information and sends another signal as a response to the stimulus.
This mechanism is known as the reflex arc, and it is composed of five elements,
- Receptors,
- Three types of neurons,
Afferent or sensorial neuronsInterneuronsEfferent or motor neurons- Effectors.
Due to technical problems, you will find the complete explanation about the reflex arc in the attached files.
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The only group of animals that begin their lives in the water breathing with gills and as adults can live on land breathing with lungs and go through metamorphosis is the ____? question 14 options: echinoderms mollusks amphibians reptiles
Answer:
C.
Explanation:
amphibians is the answer
The organelle responsible for
capturing light energy and
converting it to chemical energy
is called the ...
A. ribosome.
B. chloroplast.
C. mitochondria.
Answer:
B. chloroplast
Explanation:
Answer:
B. chloroplast
Explanation: Chloroplasts capture light energy from the sun to produce the free energy stored in ATP and NADPH through a process called photosynthesis.
HELP ME PLS ITS SUPER URGENT!!!
Answer:
C
Explanation:
Because it is formed in mud and things like that.
What poly-X genotype is likely to produce an individual that is tall, has various physical abnormalities, and is mentally impaired
The XXXX genotype is likely to produce an individual that is tall, has various physical abnormalities, and is mentally impaired.
What is a poly-X genotype?A poly-X genotype is a genotype where more than two X chromosomes are present in the cells of an individual.
A poly-X genotype is associated with an imbalance in gene dosage for the genes in the X chromosomes.
This imbalance leads to different health problems including phenotypic characteristics such as height.
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Explain why water is essential for the process of seed germination.
Answer:
Water is an important external factor that triggers the process of germination. The seeds absorb the moisture and swells up. Then the hydrolytic enzymes become active which will break down the reserve food materials so as to make it available for the growth of embryo resulting in the germination.
Explanation:
water is essential for the process of seed germination because it helps by providing necessary hydration for the vital activities for protoplasm, provide dissolved oxygen for the growing embryo softens the coats and increase the seed permeability
photosynthesis takes place in the ____ and releases _____
1.chloroplast, oxygen
2.mitochondria, carbon dioxide
3. chloroplast, carbon dioxide
4. mitochondria, oxygen
chloroplast, oxygen
hope it helps...!!!
What is an adaptation
You have touched a hot stove. Your nervous system is sensing this heat. Which root of the spinal cord is receiving this information
Sensory neuron
Hope this helps :))
The sensory neuron is the root of the spinal cord is receiving this information.
When 'You have touched a hot stove. Your nervous system is sensing this heat' then a reflex action is occur.
What is reflex action?Reflex action is the actions which are carried out without conscious thought by the brain.The reflex action occur very quickly and automatically.In reflex action stimulus is carried by sensory neuron to the spinal cord.Example of reflex action is removal of hand when it touches any hot object.Therefore , the feeling of heat is carried out to the spinal cord by the sensory neuron.
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waves where the particels travel at right angles to the driction of the wave itself
Answer:
Transverse wave
Explanation:
A transverse wave is a wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels. Another example of a transverse wave is the wave that passes through a rope when you shake one end of the rope up and down, as seen in the figure below.
She always prepared food.(Yes/No question)
Answer:
YesShe always prepared food.
Secrete acute respiratory syndrome (SARS) is an illness caused by a coronavirus. Symptoms including a high fever, headaches, and body aches typically occur two to seven days after infection by the virus. SARS is more serious in elderly patients. This information suggests that the reproductive cycle of the SARS virus is –
a. Lysogenic, because the virus is a coronavirus
b. Lytic, because the virus causes respiratory illness
c. Lysogenic, because the virus primarily affects older people
d. Lytic, because of the quick onset of symptoms after infection
Answer: Lytic, because of the quick onset of symptoms after infection
Explanation: As seen in the question above, the SARS virus tends to develop symptoms very quickly when it is infecting a person. This speed in the development of symptoms is a characteristic of the lytic cycle, in relation to the reproductive cycle of viruses. This is because in the lytic cycle, a virus can infect many cells at once, which accelerates the development of the disease. This cycle allows the virus to use all of the cell's biological machinery to reproduce more copies of the virus. When these copies are ready, the virus causes the destruction of the host cell and the release of new viruses to other cells, where the whole process will be repeated. This is all done very quickly.
The lysogenic cycle does not cause the rapid infection of thousands of cells, since it is necessary that there is an adaptation between the DNA of the cell and the DNA of the virus. This slows down the infection process and, therefore, symptoms appear more slowly.
List three sources of methane that are amplified by human activities.
The largest origins of methane emissions from human activities are oil and gas systems, livestock enteric fermentation, and trashyard.
What are the human sources of methane?Methane is cast from a mixture of human-influenced and natural sources.
Human-based emission sources contain landfills, oil and natural gas systems, agarian activities, coal mining, stationary and mobile burst, wastewater cure, and specific industrial processes.
Thus, are oil and gas systems, livestock enteric fermentation, and trashyards.
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what is the term used to describe the accumulation of small changes in the gene pool of a species over time
Answer:
Microevolution
Explanation:
I just know
When using PCR to study DNA, the base pairs split and the DNA cleaves into single strands. What stage of the process does this MOST accurately describe?
A. annealing
B. denaturization
C. extension
D. hybridization
The stage of PCR being represented by the the splitting of base pairs and the cleaving of DNA into single strands is denaturation.
What is PCR?PCR means polymerase chain reaction. It is a biological technique in molecular biology for creating multiple copies of DNA from a sample.
The stages involved in the polymerase chain reaction are as follows:
Denaturation of the template into single strands Annealing of primers to each original strand for new strand synthesisExtension of the new DNA strands from the primersTherefore, stage of PCR being represented by the the splitting of base pairs and the cleaving of DNA into single strands is denaturation.
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Answer:
denaturization
Explanation:
Denaturation defines the unfolding or breaking up of a protein, modifying its standard three-dimensional structure. Proteins may be denatured by chemical action, heat or agitation causing a protein to unfold or its polypeptide chains to become disordered typically leaving the molecules non-functional.
why was the early 20th
century model of the atom
flawed
Which statement is true about a cell wall but not a cell membrane?
It forms the outer layer of a cell.
It gives an animal cell its shape.
It is selectively permeable.
It is made mostly of cellulose.
Answer:
It is made mostly of cellulose.
Explanation:
A developer wants to build a hotel along the Indian River Lagoon estuary in Florida. What impact
would this most likely have on the estuary?
1.) Decreased salinity of the estuary water
2.) Increased primary productivity in the estuary
3.) Loss of breeding and nursery grounds for marine species
4.) Loss of coral reefs and the species that live there
If this e-stuary is converted to a place used to build a hostel, there will be loss of breeding grounds for marine species.
What is an e-stuary?An es-tuary is a point where salt water and fresh water meet. The es-tuaries are characterized by changes in salt concentration.
Now, if this estuary is converted to a place used to build a hostel, there will be loss of breeding grounds for marine species.
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geologists describe the rock cycle as ' nature's recycling system' what does it mean? please help
Answer:
The Rock Cycle is Earth's great recycling process where igneous, metamorphic, and sedimentary rocks can all be derived from and form one another.Older rocks are destroyed by weathering processes and the remains are recycled into new rocks. This cycle from old rocks to new rocks is called the rock cycle. The interaction between the tectonic and the hydrologic systems causes constant recycling of the materials of the Earth's crust.
Activate cytotoxic T cells and other helper T cells as well as activate B cells
(1 Point)
Helper T Cells
Interferons
Suppressor T Cells
Cytotoxic T Cells
Helper T-cells activate cytotoxic T cells and other helper T cells as well as activate B cells. Helper T cells are the most important cells in adaptive immunity.
What do you mean by Cytotoxic T cells?Cytotoxic T cells may be defined as a type of immune cell that can destroy certain cells, including foreign cells, cancer cells, and cells contaminated with a virus.
Helper T cell not only activates the B cell but also helps in the activation of cytotoxic T cells to destroy infected target cells. Helper T cells also reform or differentiate themselves.
Therefore, Helper T-cells activate cytotoxic T cells and other helper T cells as well as activate B cells.
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What is the most common tree in the taiga?
Answer: Conifers. A variety of conifers thrive in the taiga where they easily shed snow while keeping their needles all winter. The small needles of the conifers, which include black spruce, white spruce, balsam fir and jack pine, feature a waxy coating that helps minimize the loss of moisture.
Explanation:
Which percentage of the solar energy that the earth absorbs does the it's surface
radiate?
2
15
50
75
Answer:
The correct answer is is 71 percent. Give me Brainiliest
In wild populations, individuals most often are found near available resources and show a _____ pattern of dispersion.
Clumped. Have a nice day!
Duriing exercise, what body condition is the body trying to keep in homeotasis?
Answer:
Because in our body constant supply of oxygen is support to the cells to works out muscles properly
Explanation:
Why is it important for an organism to have high fitness (the ability to survive and make a lot of offspring)?
Answer:
An organism with high fitness has adaptations that are well suited to their environment allowing them survive and reproduce. An organism with low fitness has characteristics that are not well suited to their environment meaning they almost certainly die without reproducing.
Explanation:
if you were asked to construct a power plant that uses only renewable energy sources, what type of energy would you use ? Explain.