Which of the following changes takes place during the third trimester of a woman's pregnancy?
A. The fetus develops toenails, lips, and eyelashes.
B. The fetus's hands and feet appear.
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C. The baby usually moves into a head-down position.
D. The fetus begins to form teeth.
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Select all that apply genes are specific nucleotide sequences occur in numbers that are the same as the number of chromosomes are located in a specific place on a chromosome determine the traits of an organism are units of rna

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

The structure that houses the cells genetic information.