Which statements correctly compare alleles and genes? a. alleles are alternative forms of instructions. genes carry instructions to create proteins. b. alleles carry dna instructions. genes decode dna instruction to make proteins. c. alleles are found on chromosomes. genes are found in ribosomes. d. alleles contain sections of dna code. genes contain a single strand of dna.

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.