Natural lakes are formed by erosion. ALL BUT one of these is a type of erosion that forms lakes.

A) glaciers.

B) gravity.

C) rivers.

D) wind.

Respiratory structures of land animals can include which of the following: A. Lungs B. Skin C. Gills D. Both A and B

Where are the kidneys and liver situated in the body?

Which statement best describes the law of conservation of energy? O A. The total energy in an open system can only increase. B. Energy cannot be created or destroyed. C. Energy cannot change forms. O O D.

A scientist used a radioactive isotope of nitrogen to label the nitrogenous bases of the DNA in bacterial cells. The labeled cells were then allowed to grow and divide for one generation in a medium of non-radioactive nitrogen.

The fact that individuals who possess favorable traits are more likely to survive and reproduce than those who possess less favorable traits is the basis for which theory? a. the fixity of species b. the inheritance of acquired characteristics c.

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.