In order for natural selection to occur which conditions are necessary?

A. No mutations

B. each organism born must survive

C. no variation

D. more born than can survive

Use the example of DDT to explain how a pesticide can bioamplify and damage entire ecosystems

What is the primary source of energy for most ecosystems

Although not designated as endocrine glands, several organs within the body secrete hormones as part of their normal function. which organ secretes hormones involved in increasing blood pressure and volume and maturation of red blood cells?

What is quantum mechanics

Which statement best explains how air pollution from fossil fuels affects a marine environment

Which would be a consequence of the removal of predators from a population such as the trinidadian guppy population?

Activation of the anterior cingulate cortex would be expected to

Particles in a warmer substance have a. average kinetic energy than particles in the substance when it is cooler

All bacteria are classified as A. Eukaryotes. B. Prokaryotes. C. Archaea. D. Protista.

All the systems of the body work together to keep the internal environment of the body constant within certain limits. this process is called a. homeopathy. b. homoeostasis. c. positive feedback. d. neuroglia.