All of the following are algae except:
A) desmids.
B) diatoms.
C) dinoflagellates.
D) sporozoa.
D) sporozoa.
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Suppose an antibody to bindin and sea urchin sperm were mixed together and the mixture was added to eggs. You predict that the antibody-treated sperm will _____
A) fertilize the eggs normally B) fertilize eggs from other species C) not bind to the egg membrane D) not be able to swim toward the egg
What does recent research suggest about the relationships between weight and health risks?
A) People of normal weights have the lowest health risks. B) People who are moderately obese have the highest health risks. C) People who are slightly overweight have the lowest health risks. D) People who are underweight have the highest health risks.
The __________ circuit carries blood from the heart to body tissues, and then returns it to the heart.
Fill in the blank(s) with the appropriate word(s).
According to the most widely accepted hypothesis, the origin of the nuclear genome involved:
A. an endosymbiotic relationship between an archaeon and a bacterium. B. a symbiotic relationship between an archaeon and a bacterium. C. an endosymbiotic relationship between two archaeons. D. an endosymbiotic relationship between two bacterium. E. a symbiotic relationship between two archaeons.