*Question*
Q: What is the term for individuals of a species that live in a particular habitat? Choices: - family - ecosystem - biosphere - population A:
**Answer**
population

*Question*
Q: The adrenal cortex directly influences the function of what organs through the production of the hormone aldosterone to stimulate sodium reabsorption? Choices: - lungs - heart - tumors - kidneys A:
**Answer**
kidneys

*Question*
Q: Mesophyll consists mainly of parenchyma cells specialized for what? Choices: - circulation - respiration - digestion - photosynthesis A:
**Answer**
photosynthesis

*Question*
Q: Endotherms are warmed mostly by heat generated by what? Choices: - movement - electricity - the sun - metabolism A:
**Answer**
metabolism