The use of coal and other fuels is the most prominent means by which humans add carbon dioxide to the atmosphere.

a. True

b. False

Nonhuman primates avoid close inbreeding by

One species of fish feeds in the muddy bottom of a lake. a second species eats insects that land on the water surface. this is an example of

Relate the four chemicals on the rungs of a dna ladder to the letters of our alphabet. describe the code these "letters" can form. what does the code do?

DDT was banned from use as a pesticide in the us because

How was HMS Beagle's voyage significant to science? It allowed Darwin to practice artificial selection. It allowed Darwin to study characteristics of similar species. It allowed Darwin to understand how genes mutate.

1. As an object moves towards another object the sound waves bunch up. True Or False 2. As an object moves toward another object the sound waves have lower frequency. True or False. 3.

Do we classify viruses as living

What caused the evolution of antibiotic-resistant bacteria?

In the metabolism of amino acids for energy, what is the fate of the amino group? a. excreted as urea b. burned for energy c. stored in the liver d. converted to glucose

Which function of the nephron includes the movement of fluid from the blood into bowman's capsule?