Examine Figure 48.5 in your text. According to this figure, mean temperature changes from 1940–1980 and 1999–2008 have been greatest:
A. in Australia.
B. in southern Africa.
C. near the equator.
D. in South America.
E. in the northern hemisphere.
E
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Clonal selection produces plasma cells that _________.
A) can differentiate into memory cells B) can live for years C) are different from one another and produce different antibody molecules D) are identical to one another and produce identical antibody molecules
The innervation ratio of motor units is not standard and depends on the demands of the muscle. Which of the following muscles would have the lowest innervation ratio? How would this affect its function?
a. Soleus: coarse movement b. Orbicularis oculi: fine movement c. Gluteus maximus: fine movement d. Vastus lateralis: coarse movement
Complementation experiments are used to determine if two observed mutations that are associated with the same trait are actually in the same gene
Indicate whether the statement is true or false
Which type of homology does this typify?
When humans are developing, in utero, they have characteristics that are not found in the fully developed infant. Gill slits are one example of these characteristics. A. Developmental. B. Structural. C. Vestigal. D. Molecular. E. Both developmental and vestigal.