Describe two main sources of genetic variation.

Why is evolution considered the unifying concept in biology? a. it explains similarities and differences in life b. it explains how life originated. c. it explains why dna has only four bases. d. it explains why life exists. e.

What are the differences between Parasympathetic nervous system and sympathetic nervous system

How many atp are generated in the electron transport chain? how many atp are generated in the electron transport chain?

What is it like in Earth's inner and outer cores? Describe the temperature, pressure, and composition.

How many chromosomes do humans cells contain

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.