The fusion of the cytoplasms of two genetically different cells is known as ____
a. osmosis
b. karyogamy
c. cytoplasmic streaming
d. plasmogamy
e. mutual symbiosis
ANSWER: d
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Sponges have a bone-like support system of spicules that are made up of which of the following materials?
a. calcium and hydrogen b. cellulose and silica c. calcium carbonate or silica d. chitin or calcium carbonate
Crosses between a yellow rat and a yellow rat always produce yellow. Crosses between a white rat and
a white rat always produce white. The alleles affect the same aspect of coat color. The crosses of a white rat and a yellow rat produce cream. What happens if you cross two cream rats? What will be an ideal response?
The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by the _____
A) transportation of membrane lipids among the membranes of the endomembrane system by small membrane vesicles B) function of the Golgi apparatus in sorting and directing membrane components C) modification of the membrane components once they reach their final destination D) synthesis of different lipids and proteins in each of the organelles of the endomembrane system
You are employed by the Natural History Museum of Chicago as a wildlife biologist. You recently completed an expedition to Indonesia where you discovered a new and very colorful species of beetle. Based on observations, you hypothesize that sexual selection may be playing a role in the evolution of this species. Which of the following observations would support your hypothesis?
A. Males defend territories. B. Female preference for larger, brighter males. C. Male beetles are bigger and more brightly colored than females. D. All of the above observations would support your hypothesis.