Biology, 03.12.2019 13:31 loredobrooke9929
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. t cells
c. antibodies
d. natural killer cells
Answers: 1
Biology, 21.06.2019 12:30
How do ecosystem respond to nature disasters such as fires and floods
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Biology, 22.06.2019 02:00
The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except
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Biology, 22.06.2019 02:00
Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z
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Biology, 22.06.2019 02:00
The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that
Answers: 1
Which of the following types of cells can directly kill cells and secretes a chemical known as perfo...
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