What is an adaptation?
A. A mutation that makes an organism unable to reproduce
B. Something an organism is taught by its parent’s
C. Something that helps an organism survive and reproduce
D. A way for an ecosystem to recover after a disturbance

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Nh3 +02-no + h20 is unbalanced what is the balanced equation

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer