In which time frames can short-term environmental changes occur? Check all that apply.
in days
in minutes
over hundreds of years
over thousands of years
over billions of years

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.

What is a general feature of a species that varies from one individual to the next (skin tone,eye color or hair color)? a.organism b.trait c.character