Which of the following organelles oxidizes toxic substances such as alcohol, and breaks down other potentially harmful by-products of metabolism?
a) lysosomes b) peroxisomes c) mitochondria d) proteasomes e) ribosomes
b) peroxisomes
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If you wished to design an antimicrobial agent that prevented the formation of the 70S initiation complex in bacterial translation, which molecule should be specifically be targeted?
A. Peptidyl transferase B. IF-3 C. EF-1 D. mRNA
Male hummingbirds flash a patch of iridescent feathers on their neck called the gorget. This behavior makes them very visible. Why advertise their presence to a predator?
A. Hummingbirds are so fast that predation is not a large factor for them. B. Predators cannot see colors so are not alerted. C. The benefits of defending a territory exceed the costs of predation. D. This is an example of a maladaptive behavior that decreases overall fitness. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about the tradeoff of being visible to potential mates and predators? What other information is related to the question? Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In the vicinity of the equator, air warmed by solar radiation rises
Indicate whether the statement is true or false
The anterior pituitary gland receives hormone messages from the hypothalamus via ________.
a. a capillary network b. neurons that extend from the hypothalamus to the pituitary c. Schwann cells d. both a & b