By pumping water over their gills, fish and aquatic mollusks?

a. keep their gill membranes moist

b. maintain their body temperature

c. keep themselves moving through the water

d. promote diffusion of oxygen and carbon dioxide

Healthy body composition is best characterized by a. a high proportion of muscle, fat, and bone and a low proportion of water. b. high proportion of muscle, bone, and water and a low proportion of fat. c.

The Endangered Species Act was established in 1973. This significant environmental law provides all of the following except.

What is the energy brought by electron carrier to the mitochondria used for?

Why is photosynthesis important for plant cells

True or false: A number that describes how likely it is that an event will occur is the probability of the event.

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white

The green stem ant has three (autosome) chromosomes. During meiosis, chromosome 1 and 3 separate normally, but chromosome 2 homologs do not separate during meiosis I. Meiosis II happens normally. What will the resulting cells of meiosis look like?

A population is growing at a rate of 2,4,8, 16, 32. Which type of growth does this describe?

Which epithelial tissue type is most often found lining large ducts, such as those of the salivary glands or pancreas?

Evolution led to certain fishes, such as lung fishes to adapt to terrestrial mode of life. These fishes were the ancestors of modern amphibians. Which evolutionary mechanism is represented by this example?