A biome can be broken into increasingly complex components.
population community
What is the most specific grouping in a
biome?
ecosystem
biome
Species
Ecosystem

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Each hereditary trait corresponds to

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?