What is the purpose of a punnett square?
a.) predicting the outcome of a coin toss
b.) finding how many genes a person has
c.) predicting the outcome of a genetic cross
d.) finding the number of offspring people can have

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Several billion years ago which gas was the least prevailant in the atmosphere

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.