This year will have a February 29th if, and only if, this is a leap year. Which word phrase in the statement makes this a biconditional?

When an organism reproduces asexually it usually has what?

What is the purpose of water in an ecosystem?

How do amounts of green pigment, chlorophyll, different from summer to fall

Which of the following conditions makes fossils formation more likely? A) buried slowly B) attacked by scavengers C) made of hard parts D) composed of soft parts

In the spinal cord, the small gaps in the myelin sheath between adjacent glial cells are called

What list correctly shows carbohydrates in size from smallest to largest?

How do biotic factors affect the environment?

The part of the brain where planning, language and advanced thought occur is:the hippocampus. the amygdala. the cortex. the hypothalamus.

Which best explains the difference between a ball-and-stick model of a chemical compound and a space-filling model? Ball-and-stick models can show compounds in three dimensions, but space-filling models cannot.

Which of the following are not allowed on public land?