BIOLOGY COLLEGE

Which of the following types of cells can directly kill cells and secretes a chemical known as perforin which accomplishes the killing by producing pore-like openings in the membranes of cells?a. Cytotoxic T cells
b. Helper T cells
c. Antibodies
d. Natural killer cells

Answers

Answer 1
Answer:

Answer:

Cytotoxic T cells

Explanation:

Perforin is the cytosolic protein and upon degranulation forms pores in the target cell. Perforin protein helps in the transport of water and ions.

Perforin is present in the granules of cytotoxic T cells. These cells have the ability to kill virus infected cells and cancer cells. Cytotoxic T cells bind with the class 1 MHC molecules. These cells are also known as CD8+ T cells.

Thus, the correct answer is option (A).

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What are some of the functions of vascular tissue in seedless plants? (Choose all that apply)provides structural support that allows some lycophytes to grow taller
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Answers

Vascular tissues can provide support to the plants and also help in the transport of water, mineral and food. So, the correct options are A, B and C.

What is vascular tissue?

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Therefore, the correct options are A, B and C.

Read more about vascular tissues, herebrainly.com/question/1162129

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Answer:

Explanation:

Xylem transports and stores water and water-soluble nutrients in vascular plants.

Phloem is responsible for transporting sugars, proteins, and other organic molecules in plants.

Vascular plants are able to grow higher than other plants due to the rigidity of xylem cells, which support the plant.

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Answers

Answer:

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