The cell membrane is considered what?

semi-permeable.

porous.

all of the above

fully permeable.

Which type of fermentation is better for a biological system ethanol fermentation or lactic acid fermentation? Justify answer with facts

What shows the Correct order in which food moves During digestion

The signals for mucus release include a) parasympathetic innervation b) a variety of neuropeptides found in the enteric nervous system c) cytokines from immunocytes

Darwin came up with the theory of natural selection, and the idea of survival of the fittest. In order for natural selection to occur, many things must happen.

In DNA molecules nucleotides bond together according to the nitrogenous bases. Which of the following correctly describes how nitrogenous bases bond together? A). Purines bond to other purines B). Purines bond to pyrimidines 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.