Why do living thing need energy.

How much air is in the atmosphere

Facts about environmental change

Prairie dogs are burrowing rodents that live in grasslands. What makes the prairie dog a keystone species in the ecosystem? A) Prairie dogs are the main source of food for wolves and coyotes in the grassland.

Assuming that the genes are on separate chromosomes, an organism with the genotype AaBb will make gametes in the following proportions: 1/4 AB, 1/4 Ab, 1/4 aB, and 1/4 ab. What process produces such results?

How is a scientific law different from a scientific theory? A. A theory becomes a law after a long period of time has passed. B. A theory cannot be disproved but a law can be disproved. 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.