Zebrafish (Daniorerio) are especially useful in the study of early development because their embryos ______________
(a) are exceptionally large.
(b) develop slowly.
(c) are transparent.
(d) are pigmented.
(c)
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A distinctive feature of eukaryotes is the organization of tightly packaged chromosomal DNA with proteins into a membrane-bound structure called a:
A. nucleolus. B. cell. C. nucleus. D. plasma membrane.
Four of the five answers listed below are found in a common energy-carrying molecule. Select the exception
a. phosphate b. adenine c. deoxyribose d. hydrogen e. ribose
What term describes a group of animals that is self-organized by rank?
a. selfish herd b. dominance hierarchy c. pack d. social group e. culture
Refer to Figure 15-1. The use of antibiotic medium at the end of this process:
a. selects against plasmids containing human DNA fragments.
b. selects for plasmids containing particular DNA fragments.
c. selects for bacteria containing plasmids.
d. selects for bacteria lacking plasmids.
e. prevents contamination of the medium