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Anastasy [175]
2 years ago
5

3. Are vaccines available to prevent HIV and cancers? (3)

Biology
1 answer:
katrin [286]2 years ago
3 0
Es | HIV.gov
There is currently no vaccine available that will prevent HIV infection or treat those who have it. However, scientists are working to develop one.
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Appraise the importance of the role plants play in the water cycle
seraphim [82]

Answer:

The correct answer is - holds water in their body plays a role as evapotranspiration.

Explanation:

Plants play important role in a hydrologic cycle or water cycle as they absorb water from the ground. They utilize this water for their cellular function and the rest of the water is released into the atmosphere.

The process is known as transpiration or in the hydrologic cycle evapotranspiration as water exits the plant body in the form of vapor or droplets. This helps the plant to cool its body and also helps to available for the atmosphere again in pure form. It

6 0
2 years ago
A neuron can receive thousands of EPSPs from different neurons, and responds by triggering or not triggering an action potential
Korvikt [17]

Answer:

The addition and response to the net effect of postsynaptic potentials is called Spatial summation

Explanation:

Signal summation occurs when impulses received by a neuron are eummed together to reach the excitation threshold to fire a neuron. It occurs at the axon hillock of a neuron. Signal summation occurs since each neuron is connected to many other neurons, often receiving multiple impulses from them, both excitatory and inhibitory.

Signal summation can either be temporal or spatial.

Temporal summation, occurs when impulses received at the same place on the neuron in close temporal succession add up to initiate an action potential in the neuron.

Spatial summation occurs when impulses received simultaneously at different places on the neuron add up to initiate an action potential in the neuron.

8 0
2 years ago
If you develop a particular flower which cannot be reproduced from seeds, it could be preserved by grafting.
RideAnS [48]
True is the correct answer to your answer.
5 0
3 years ago
Pistol shrimps amd gobies depend on each other for their shelter and protection and they have a beneficial relationship with eac
Scrat [10]

The symbiosis between a Pistol shrimps and gobies is called Mutual symbiosis. <u>In this process both animals benefit. </u>The shrimp creates and maintains a burrow for both the animals to live in, where as the fish offers protection from predators. When outside of their burrow the fish keeps a keen eye to spot any predator around and sends a warning to the goby through flicking of its tail in cases of a predator approaching.

4 0
3 years ago
Read 2 more answers
Within a given species, which two types of cells have the equivalent amounts of dna?
kiruha [24]
The original question has a set of choices. This is within the context of cell division. The choices are:

A. A cell in G1 of interphase and a cell in G2 of interphase
B. A cell in G1 of interphase and a cell immediately after the completion of meiosis II
C. A cell in G1 of interphase and a cell in metaphase II of meiosis
D. A cell in G2 of interphase and a cell in metaphase II of meiosis
<span>E. None of the above.
</span>
The correct answer is C. A cell in G1 is diploid and the cell in meiosis II is haploid but the amount of DNA still equivalent as each chromosome in the haploid cell consists of two chromatids. G2 cells already had been through the S phase therefore the genetic material is already doubled. A cell immediately after meiosis II has half the genetic material.
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3 years ago
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