The heart is an example of which level of organization within an organism?

cell

organ

tissue

organ system

The (blank) carry the carbon dioxide and other waste

Which of the following is not found in the cytoplasm of bacterial cells? a. nuclei b. endospores c. ribosomes d. porins

What might happen if the gametes of a species had the same number of chromosomes as the species' body cells?

A researcher may decide that a taxon is actually polyphyletic if

What conclusion can be drawn from the rat outbreak hypothesis for Easter Island? A. The introduction of nonnative species has environmental consequences. B. Climate changes have environmental consequences for all inhabitants of an environment. C.

Select the one true statement. Vacuoles store nutrients, water, and waste in animal cells. Plant cells can have chloroplasts but do not have a cell wall.

Using water more effectively A. Protects the environment B. Causes the loss of natural pollution filters C. Increases with contamination D. All of the above

2. The name given to energy stored in food is A. glycolysis. B. a matrix. C. a calorie. D. fermentation.

How are capillaries involved in gas exchange

The specific receptors responsible for rotation found in the semicircular canals is called a. Ampulla b. Vestibule c. Auricle d. Saccule e. Crista