SRY is best described as _____

A) a gene present on the X chromosome that triggers female development
B) an autosomal gene that is required for the expression of genes on the Y chromosome
C) a gene region present on the Y chromosome that triggers male development
D) an autosomal gene that is required for the expression of genes on the X chromosome


C

Biology & Microbiology

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What is the function of an amacrine cell?

a. transmit information from photoreceptors directly to the brain b. modulate the activity of other photoreceptors c. transmit information from bipolar cells to the ganglion cells d. modulate lateral inhibition e. transmit information from photoreceptors to bipolar cells

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Which immune cells can kill cancerous cells that lack MHC markers?

a. effector B cells b. cytotoxic T cells c. natural killer cells d. both cytotoxic T cells and natural killer cells e. all of these

Biology & Microbiology

It has been difficult to generate drugs to treat AIDS for which reason?

HIV does not cause AIDS. HIV does not use any enzymes that can be targeted by drugs. HIV mutates rapidly. The only way to kill a virus is with a vaccine, not with drugs. People with HIV infections die rapidly, before the drugs have a chance to cure them.

Biology & Microbiology

The oxygen that arose in early Earth's atmosphere was likely produced by organisms that were very similar to modern

A) plants. B) algae. C) fungi. D) cyanobacteria. E) protists.

Biology & Microbiology