Why is the sporophyte generation better adapted to land than the gametophyte generation?
What will be an ideal response?
The best responses should include that the sporophyte generation contains vascular tissue and the gametophyte generation does not. Also the sporophyte generation is diploid and the gametophyte is haploid. Two sets of chromosomes in the sporophyte may offer "protection" from mutations. In other words mutations may not be expressed as often in diploid individuals. On land, organisms are probably exposed to more mutagenic agents (i.e., ultraviolet radiation). A student may also mention that the sporophyte generation produces flowers and cones in seed-bearing plants.
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An experiment was done to determine the decimal reduction time of a specific population of organisms at 80oC. The data is indicated by an arrow on the graph. Which labeled line represents the likely results if the experiment was repeated using a lower temperature?
A. Line C B. Line A C. Line B D. Line D
The many pairs of cranial nerves are numbered as follows:
a. 1 through 10 b. 1 through 12 c. I throught XII d. I through X
Do all animal samples have similar profiles?
a. Yes b. No
Organismal genetics observes the heredity of the whole organism.
a. true b. false