Which combination of organisms could be expected to survive in isolation from other forms of life available?
a. producers and decomposers
b. producers and carnivores
c. carnivores and decomposers
d. herbivores, carnivores, and decomposers
e. omnivores and decomposers
ANSWER: a
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Which phenotypes are parental?
In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:
A) wild-type and orange
B) brown and bright-red
C) wild-type and brown
D) bright-red and orange
E) There is no way to determine this.
Which of the following is capable of resetting the thermostat of the body to cause a fever?
A) complement B) pyrogen C) antigen D) perforin
The embryo is located inside the cotyledon.
Answer the following statement true (T) or false (F)
Which of the following is TRUE of chemokines?
A) They ensure production of enough leukocytes. B) They are involved in B lymphocyte activation and differentiation. C) They are chemotactic factors for leukocytes. D) They cause basophils and eosinophils to degranulate. E) They are substances used to signal between leukocytes.