How were experiments done by Griffith similar to those done by Avery, MacLeod, and McCarty?
A. Both used enzymes that destroyed DNA
B. Both used pneumococcal bacteria
C. Both used purified DNA
D. Both were done in the 1940s
E. Both used a mouse host
Answer: B
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Icefish have which type of circulatory system?
A. closed with a two-chambered heart B. opened without a heart C. closed with a single-chambered heart D. closed with a three-chambered heart E. closed with a four-chambered heart
Bees are currently suffering from disease, and population numbers are decreasing. What is a likely consequence for flowers if this continues?
1.There would be no need for stamens for pollination, so flowers would evolve with just carpels.
2.Other insects would take over the role of pollination for the plant.
3.Plants could go extinct if there isn’t any pollination by other organisms.
4.The plant would be forced to rely on wind for pollination.
A gene can be silenced by the addition of what
to a nucleotide? a. -CH3 b. -COOH c. -OH d. -NH2 e. -PO4 -3
T or F: medial and lateral are the same as left and right
What will be an ideal response?