Embryonic stem cells give rise to all cell types in the developing embryo. Would you expect the interphase period of stem cells to be long or short?

What is required for a person to have sickle-cell disease? A. the person is homozygous and has malaria B. the person is heterozygous and has malaria C. the person is heterozygous for the trait D. the person is homozygous for the trait

Which way will the water molecules flow across the phospholipid membrane? A. high solute concentration to low solute concentration B. low solute concentration to high solute concentration C. equal movement between both sides

Which domain does an infectious bacterium belong to? a. Archaea b. Bacteria c. Eukarya

What are the two steps that ALL organisms need to satisfy in order for cells to have energy and which step so photosynthesis and cellular respiration fit into.

If the Moon has soil similar to Earth, then the Moon may have come from Earth. Which question best matches this hypothesis?

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.