A source from which organisms generally take elements is called a/an

A. biotic community.

B. exchange pool.

C. reservoir.

D. food web.

Name the two terms that are both used to describe the deliberate state policy of mass killing directed at some identifiable group of people.

Swine are vulnerable to infection by bird flu virus and human flu virus, which can both be present in an individual pig at the same time.

Matthew takes two 50-milligram iron tablets each day. How many grams of iron does he take daily?

Why a cell cannot just keep growing

A dog breeder decides that he wants to make his chihuahuas smaller. He calls another breeder and borrows their smallest female chihuahua to breed with his smallest male chihuahua. This is an example of A. natural selection. B. selective breeding. C.

Why was nucleic acid disregarded for so long as the molecule responsible for the transmission of hereditary information?

Sally's estimated energy requirement, based upon her age, height, and weight, is approximately 2000 kcalories per day. What is the maximum number of kcalories per day that she can consume to lose 3 pounds per month. Assume 1 month is 30 days. a.

Which hormone causes the regrowth of the endometrial lining of the uterus? testosterone estrogen GnRH progesterone

78.44 meters to centimeters

Which of these is an example of an endoparasitic relationship? O A. A tapeworm living in an animal's intestine O B. A rabbit eating lettuce in a farmer's garden O C. A tick living in an animal's fur coat O D. A snake eating a mouse in a cornfield