Answer:
Autorophs are living organisms that make their food through photosynthesis while heterotrophs are living organisms that can not make their own food, so they must eat it.
Explanation:
Hope it helps!
Answer:
D. Useless
Explanation:
According to Dictionary.com, “in vain” is defined as “without real significance, value, or importance; baseless or worthless.”
A chemical change has occurred because the wood has turned into a substance that can't be changed back to it's original form. The wood has turned to ash, chemical changes are non reversible.
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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).
