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olga nikolaevna [1]
3 years ago
14

What is the name of the cell that activates CD4 and CD8 cells?

Biology
1 answer:
julsineya [31]3 years ago
5 0

Hey there! Let's solve the problem:

CD4 T cells activate CD8 T cells through an underhanded cycle including an antigen presenting cell (APC), customarily a standard dendritic cell (DC). An APC presents a peptide to a true CD4 T cell through a Class II MHC molecule.

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Give an example of four different types of algae and give two uses we use them for
Zanzabum

Answer:

microalgae (cyanobacteria are also part of this family). Due to their fast growth rates, high oil content and less complex structure, they are the preferred source for biofuels. These algae can be either sourced from nature or grown in labs (in large reactors) and then chemically converted to biofuels.

Explanation:

i can only think of one so i hope this helps a bit

7 0
2 years ago
Compare the hibiscus and spider lily pollen grain structure​
gregori [183]

Explanation:

Pollen grains are the male gametes in plants. It is present on the anthers. Pollen grains finds its way to the ovule by the process of pollination. The structure of pollen grains vary from one species of flower to another. The hibiscus and spider lily both have circular pollen grain.

However, the atomic structure of pollen grain of hibiscus represents the Buckminster fullerene but is not shown in spider lily. The pollen grains of hibiscus have spikes on its surface.

8 0
3 years ago
Most streams result from _____. <br> a. altitude <br> b. melted snow <br> c. oceans <br> d. rivers
tatiyna

Answer:

....b........ melted snow

4 0
2 years ago
Read 2 more answers
Punnet square worksheet!<br><br> help please.
NemiM [27]

Answer:

long are W which means that they are stronger than the w trait of short.  

1)the big word means that it will have two W traits, (or W,W), and heterozygous will mean that the seal will have one W and one w, (or W, w).  

your Punnett Square will look like this W     W  which means that 100% of  

these       W W W  W W  

seals        w  W w  W w  

will have long.  

2)Heterozygous and a short will look like this  

           w  W w  w w  

           w   w w  w w  

which means that only 25% will have long and 75% will have short, this is due to how W traits will almost always beat recessive traits.  

3)Now one is, (H) and two is, (h). Two Hybrid means that they are Heterozygous. This will make your Punnett Square look like this                              

       H    h  

 H  H H  H h  

 h   H h  h h  

the possible Genotypes willbe H H, H h, h h.  

Phenotypes, looktraits willbe One,and Two.  

5 0
3 years ago
Read 2 more answers
Is the following an example of a. Negative feedback loop b. Positive feedback loop Hydrochloric acid and pepsin are enzymes secr
Finger [1]

Answer:  This is a positive feedback loop.

Explanation:

The protein digestion in the body is an example of the positive feedback. The gastric secretions is stimulated chiefly by the action of three chemicals.

These chemicals are acetylcholine, histamin and gastrin. These chemicals stimulate the parietal cells to secrete HCL and intrinsic factors.

The chief cells secrete pepsinogen in response to the gastrin and ACh. As the dietary proteins are digested, it breaks down the amino acids and peptides.

This stimulates the G cells of the stomach to secrete more gastrin. This is how the positive feedback loop for the protein digestion works.

5 0
3 years ago
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