Identify and briefly explain two adaptations of diving marine mammals, such as seals and dolphins. What will be an ideal response?
Some adaptations of diving marine mammals are:1.
exhaling before diving (consequently they are less buoyant and less likely to exhibit
decompression sickness),
2. having a greater volume of blood and a higher concentration of myoglobin than non-diving
mammal (consequently they are able to store more O2 than terrestrial mammals),
3. having a large spleen which stores oxygen-rich RBCs,
4. reducing the expenditure of energy during diving by gliding, and
5. having a highly efficient diving reflex in which metabolism decreases, heart rate slows,,
and blood is redistributed preferentially to the heart and brain.
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Proteins in biological systems _____
A) store genetic information B) link with other proteins to form bilayers in cell membranes C) form high-energy intermediates such as ATP D) catalyze reactions
Which of the following is the molecular mechanism responsible for genomic imprinting?
a. methylation b. ligation c. mutation d. deletion
Based on von Frisch's work on honeybee communication, which type of information is communicated to other workers by a honeybee's "dance"?
A) the direction of the nectar source B) the distance of the nectar source from the nearest water C) the color of the flowers producing the nectar D) the quality of the nectar
Which researcher would be most accurately described as engaging in reproductive cloning?
A. Conseula's research is focused in generating new bone tissue from iPS cells. B. Peter is trying to clone particularly large bull. C. Roger works in a lab that is trying to induce the formation of pancreatic cells. D. Shelly wants to induce cells to form new neural tissue.