Which term describes a living organism's position in the flow of energy through an ecosystem?

A. trophic level

B. food web

C. biotic factor

D. energy pyramid

What is the name for the trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock?

Which activity distinguishes the larva stage from the pupa stage of an insect? A. making its own food B. reproducing C. feeding D. location shelter

A deep sleep in which the individual cannot be aroused and does not respond to external stimuli is known as a.

Prove using a punnett square that two blue eyed people can not have a brown eyed child

In this lab, the three flocks of birds changed in numbers between generation 1 and generation 3. Why? Check all reasons. The amount of food available increased and decreased.

Which plant division has seeds with a 3n endosperm due to double fertilization?

What is a difference between systemic and pulmonary circulation? A. Systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. B.

Name the cells that are produced by the testes and ovaries

What description best explains why viruses can become more pathogenic to hosts that were not affected by the virus before?

The chief force pushing water and solutes out of the blood across the filtration membrane is A) the ionic electrochemical gradient B) protein-regulated diffusion C) glomerular hydrostatic pressure D) the size of the pores in the basement membrane of