Take a close look at the chromosomes in division 1, when homologous chromosomes come together and form tetrads. the arms of the non-sister chromatids have wound around each other and exchanged segments of chromosomes. this is called and contributes to genetic variation. a) segregation b) crossing over c) nondisjunction d) allelic mixing

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.

Which is a function of vascular tissue? a. to perform photosynthesis b. to transport water and nutrients c. to absorb minerals and sugar d. to interact with soil fungi

What nerve is affected in bell palsy