Which of the following is true regarding the concept of biomagnification?
a. Toxic materials that biomagnify are lost just as energy is lost from a natural system.
b. Toxic materials that biomagnify often accumulate in fat tissues of animals.
c. Toxic materials that biomagnify become more concentrated as they move up a food chain.
d. b and c
e. a and b
D; Toxic materials that biomagnify both accumulate in fat tissue and magnify as they move up a food chain. They are not lost to the system as energy is lost. Instead they accumulate.
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The rickettsias are divided into groups based loosely on
A) the types of clinical disease they produce. B) their insect vectors. C) taxonomy. D) their biochemical requirements.
In the graph below, how can the change in infant mortality be explained as birth weight increases from 2 to 7 pounds?
A. A larger baby will have more developed organs and thus have greater fitness.
B. A baby closer to 7 pounds will have more developed organs and thus have lower mortality.
C. A baby closer to 2 pounds will not be able to be delivered safely and thus have lower mortality.
D. A baby closer to 7 pounds will have more developed organs and thus have higher motality.
E. A baby closer to 7 pounds will not be able to be delivered safely and thus have higher mortality.
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about fitness? How does it relate to the question?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· 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?
The sperm head encloses a compact nucleus and is capped by a vesicle called what?
A. Sertoli cell B. flagellum C. acrosome D. vas deferens E. epididymis
How many ATP molecules (total) are produced
per molecule of glucose degraded during glycolysis? a. 1 b. 2 c. 4 d. 36 e. 38