How did primitive heterotrophs produce energy

In some third world countries "cyanide fishing" for aquarium trade is allowed. Cyanide fishing uses the cyanide to "stun" fish and make them easy to catch.

A simple marine food chain is depicted below. Given what you have learned about the biomagnification of some pollutants (e. g., cadmium), in what organism would you expect to find the greatest concentration of cadmium? A. Killer Whale B.

Atoms a. are extremely large. b. can be broken down. c. are extremely small.

Explain three ways in which water is important to organisms

Which hormone is the primary determinant of whether a baby will develop male or female external genitalia?

Identify what structures in a skeletal muscle will shorten in length during contraction of the muscle. choose all that apply. (0.5 pts)

What mechanisms are in place to prevent the continuous stimulation of a muscle fiber after the neurotransmitter is released from the presynaptic membrane?

According to the Hardy-Weinberg principle, genetic equilibrium would be more likely in a population of mice if :

True or false particles such as sand move in flowing water by

A minimum of how many minutes is need to achieve the benefits of Cardiovascular activity