Answer the following statements true (T) or false (F)
1. You would expect to find more mitochondria in glycolytic muscle fibers than in oxidative muscle fibers.
2. When a person "works out" with weights, their muscles typically grow. This growth is due to increases in the number of myofibrils within their muscle fibers.
3. When Ron Evans generated transgenic mice in which the gene PPAR-delta was constituitively active (i.e., always expressed), he found that these mice showed a shift from fast glycolytic fibers to slow oxidative fibers. Based on this, you would also predict faster sprint speeds in the transgenic mice.
4. Muscles that extend a limb at a joint are termed "extensors."
1. FALSE
2. TRUE
3. FALSE
4. TRUE
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In a food chain consisting of four trophic levels, if the energy present in the top level is 48 kcal/m2/yr, how much energy do you expect in herbivores? (Use an energy transfer rate of 10%.)
A. 4.8 kcal/m2/yr B. 48 kcal/m2/yr C. 480 kcal/m2/yr D. 4,800 kcal/m2/yr E. 48,000 kcal/m2/yr 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 energy flow? 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 allele responsible for the Siamese coat-color pattern produces an unstable tyrosinase enzyme. This type of gene product is an example of what type of allele?
What will be an ideal response?
Antibodies are most similar in structure to
A) T-cell receptors. B) bacteria. C) viruses. D) B-cell receptors. E) macrophages.
A seed has three parts: an embryo, a source of food for the developing embryo called ________, and a protective cover.
A. antheridium B. ovule C. rhizoid D. endosperm E. cone