Which of the following female organisms contain two different sex chromosomes?
a. humans
b. fruit flies
c. cows
d. butterflies
e. cats
ANSWER: d
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What term describes the unwinding and changes in the shape of a protein?
a. Denature b. Metabolism c. Condensation d. Hydrolysis e. Breakdown
In amphibians, the gray crescent appears
a. after the egg matures. b. after fertilization. c. during blastula formation. d. following gastrulation. e. as a result of tissue specialization
Which of the characteristic(s) apply to the supergroup Archaeplastida?
A. They include land plants and the green algae, Chlorophyta. B. They contain plastids that originated from endosymbiotic cyanobacteria. C. They include only multicellular organisms that contain plastids. D. They include multicellular and unicellular organisms. E. All of these apply.
What is the earliest fossil hominin?
A. Sahelanthropus tchadensis B. Ardipithecus kadabba C. Australopithecus robustus D. Australopithecus africanus E. Ardipithecus ramidus