1. what makes up sides of the ladder of a DNA molecule?

2. how is a RNA different from a DNA?

3. what role does RNA play in cell life

4. what are the three kinds of RNA and what does each do?

5. what can cause mutation?

A testable explanation that's supported or refuted is called a/an. A. variability ... B. hypothesis ... C. reaction ... D. experiment.

Mitosis results in genetically identical cells. Meiosis results in sex cells.

If a Killer whale is feeding at the fifth trophic level, how much phytoplankton mass is required to add each gram of new mass to the whale? Assume that 10% of the energy at one trophic level is transferred to the next level.

Scientist discovers a relatively small object in an orbital path around the sun, what is the object

Specialized cells protect the human body from disease-causing microbes by

Which processes are caused by convection currents in the mantle? Check all that apply. 1. earthquakes 2. ridge push 3. tsunamis 4. slab pull 5. volcanic eruptions 6. subduction

Imagine that you are studying the food preferences of a lizard species across its range. you have hypothesized that because these populations are fairly separate from one another, the lizards have evolved different food preferences.

An animal cell (left) and a plant cell (right) are shown. Which organelle labeled x in the diagram is found in both plant and animal cells

Where is the name of the process by which coal is taken from earth after the layer of ground on top of it is removed? A) Underground mining B) Coal rig mining C) Strip mining D) Water-blast mining

Depth perception is an important adaptation found often in: a) prey organisms. b) parasites. c) herbivores. d) predators.