In a controlled experiment,

A. a control group is compared with one or more experimental groups.

B. there are at least two variables.

C. all factors should be different.

D. a variable is not needed.

Whay are fosil important to evolution

Complex organisms develop specialized tissues as a direct result of which of the following processes A) cellular respiration B) cellular differentiation C) cellular growth D) cellular division

The growth of plants in some Arctic lakes has increased significantly in the past 150 years. Scientists attribute this increase in plant growth to the increase in surface air temperatures on Earth, also known as global warming.

Caleb has an opaque, reflective mineral. It has a blank luster.

A white mouse is crossed with a black mouse. all the offspring were gray. the genes for fur color in mice show?

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.