Which of the following is an example of imprinting?
A. Thumb-sucking in humans
B. Salmon always returning to the stream in which they were raised
C. Ducks learning to quack
D. Defending a territory
B. Salmon always returning to the stream in which they were raised
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Answer the following statements true (T) or false (F)
1.The brain determines loudness of a sound by the number of neurons that are firing and the rate at which they fire. 2.All animal eyes have a macula. 3.The T1R genes for umami and sweet are intact in dogs and cows and nonfunctional in Toothed and Baleen whales. 4.Someone suffering from seasonal affective disorder could have an abnormal functioning adrenal gland. 5.Some neurotransmitters can have hormonal activity.
Which of the following cells would most likely hav the greatest concentration of densely packed rough endoplasmic reticulum?
A. An amoeba engulfing small ciliates B. A bioluminescent bacterial cell C. A pancreatic cell engaged in the production of digestive enzymes D. A functional phloem cell at maturity E. An epithelial cell whose DNA is replicating before mitosis
The contribution of B-cells is mainly in
A. inflammation. B. complement activity. C. humoral immunity. D. phagocytosis. E. cell-mediated immunity.
Imagine that you have been transported light years away to another planet with water-filled oceans. This distant planet has a barometric pressure of 1,000 mmHg at sea level and air that contains 15 percent O2. Would you take in much more oxygen, much less oxygen, or about the same amount of oxygen per breath on this planet as you would on Earth?
A. About the same amount of oxygen as on Earth B. Much more oxygen on the distant planet C. Much less oxygen on the distant planet