The main structural component of a plant cell wall is
A) extracellular matrix
B) cellulose
C) cytoskeleton
D) middle lamella
E) plasmodesmata
Answer: B) cellulose
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In areas where fires are often suppressed, what can be said of the seeds that do not germinate
for many years until stimulated by fire?
a. The seeds remain dormant. b. The seeds hibernate. c. The seeds are disturbed. d. The seeds are opportunistic.
The alteration of the DNA sequence of gene will most often result in which of the following?
a normal protein b. a less functional or non-functional protein c. normal lipids d. less functional or non-functional lipids
Which of these traits are explained by convergent evolution?
A) sickle-cell anemia in areas where malaria is common B) light skin color in many northern populations C) short stature in natives from the island of Puka Puka D) red hair among people of Irish descent
During cellular respiration:
A) both glucose and oxygen get reduced. B) glucose is oxidized and oxygen is reduced. C) oxygen oxidizes glucose directly. D) glucose is reduced and oxygen is oxidized.