When a female mammal's ova are ready to be fertilized, we say she is in estrus or "in heat."

true
false

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false