How is most of the oxygen on Earth produced?

A. By plankton and aquifers

B. By rocks and humans

C. By plants and plankton

D. By plants and humans

Cells cannot survive without the support of other cells indicate whether this statement is ture or false

What causes a branch in a cladogram? A) a derived trait B) an offspring C) an ancestral trait D) an outgroup

Each nephron has a slightly coiled tube that has a blank membrane?

Anything within an environment that causes a response in an organism A.) long-day plants B.) short-day plants c.) tropism D.) stimulus

To be considered a successful adaptation must make the organism more likely to

Why does the United States experience winter during the months of November through early March

Simulations are useful for understanding how natural processes work but are not always representative of the real world. How does this simulation differ from what might happen in a true ecosystem?

Metamorphic rock with A handed appearance due to the alignment of minerals are

What results when the combined effect of two different drugs taken together exceeds the sum of the individual drugs administered alone?

Animal lays eggs with a tough leathery watertight shell