What are memory cells?

Which statements explain the cold temperatures in the Northern Hemisphere during the winter? Choose the two correct answers. A. The Northern Hemisphere is farther from the sun during the winter. B.

Which organelles are found in prokaryotic cells, as well as eukaryotic cells? A. cytoskeleton B. mitochondria C. cell membrane D. vacuole

Based on the theory of evolution, in which rock layer would we find the least biodiversity?.

Name three mechanisms that can increase cardiac output. Explain the effect on blood flow of mitral valve incompetence. Explain the importance/function for each of the following: a. High elastic fiber content in the aorta b.

Where do most of the world's coal mines come from?

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.