Which of the following is a characteristic of hormones?

a. Inactive bacteria

b. Act as messenger molecules

c. Act as buffers in the bloodstream

d. Coordinate visual response

What is the major environment factor limiting the number of autotrophs at great depths in the ocean?

What did Hutton contribute to the origins of evolutionary thought?

Which organ is involved in ingestion? mouth rectum villi liver

What is stream velocity? What type of particles will deposit first then last?

578+9 (78-56) : 2+89*7 + (24-5*2-14)

In humans, long eyelashes (L) are dominant to short eyelashes (l) and wet ear wax (W) is dominant to dry ear wax (w). Assume the genes for eyelash length and ear wax consistency are on different chromosomes and assort independently.

What characteristics distinguish prokaryotic and eukaryotic cells A. Eukaryotes have membrane-bound organelles; prokaryotes do not B. Eukaryotic chromosomes are linear; prokaryotic chromosomes are circular C.

Which of the following is a major difference between lactic acid in alcohol fermentation?

What happens when two organisms attempt to occupy the same niche?

How many variables are tested in any controlled experiment?