How does human evolution or natural selection relate to the susceptibility of disease?

Aphids are tiny insects that feed on plants. ladybugs are to plants because they eat aphids. which type of organism are aphids in this scenario? co decomposers predators prey producers

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

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?