Light enters the eye's interior through the __________, an adjustable opening in the center of the
muscular, doughnut-shaped iris. Fill in the blank(s) with the appropriate word(s).
pupil
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The illustration shows a cell in __________ of mitosis
a. anaphase b. metaphase c. interphase d. prophase e. telophase
Which of the following cell types are specifically responsible for the B cell response?
A) T cells
B) B cells
C) phagocytic cells
D) natural killer cells
In humans, clear gender differentiation occurs, not at fertilization, but after the second month of gestation. What is the first event of this differentiation?
A) formation of testosterone in male embryos B) formation of estrogens in female embryos C) activation of SRY in male embryos and masculinization of the gonads D) activation of SRY in females and feminization of the gonads
Identify the following reaction: H2O + CO2 H2CO3
a. Dehydration synthesis reaction b. Hydrolysis reaction c. Exchange reaction d. Reversible reaction e. Covalent reaction