Which was first on the planet, prokaryotes or eukaryotes?
A. Eukaryotes
B. Prokaryotes
C. They both appear in the fossil record at about the same time.
D. Researchers do not know which group came first
Answer: B
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Cells of the outer surface of a sponge obtain nutrients
by a. absorbing food that diffuses from the central cavity. b. capturing food in their microvilli. c. absorbing food distributed by amoeboid cells. d. phagocytosing bacteria and other small food items. e. poisoning small fish that contact them
The most common defect in color vision, termed red-green color blindness, results from a faulty opsin gene.
Answer the following statement true (T) or false (F)
The fluid fraction of the blood is called the _______.
a) syrup b) nasum c) residual factor d) serum
Which of the following is not an autoimmune disease?
A. polio B. type I diabetes C. Graves' disease D. rheumatoid arthritis E. lupus