Evaluate why intrinsic rate of increase alone is not necessarily an indication of how quickly a population will grow over a given period of time compared to that of another population or species
What will be an ideal response?
There are several factors involved in how quickly a population will increase in size. Differences in generation time have a big impact on how quickly a population can grow. A lower death rate compared to birth rate would have no advantage in the short term when a bacterium can go through many thousands of generations in less time than it takes a mammal to go through one. How a species deals with carrying capacity is another factor. K-selected species may be more stable, while an r-selected species may crash after overpopulation reduces resources and actually reduces carrying capacity. Age structure of a population is another factor. Regardless of its current rate of growth, a population with lots of younger individuals who are or soon will be entering reproductive age will have a faster rate of growth in the near future. Finally, immigration can change expected outcomes of population growth based on the intrinsic rate of growth. Even a population expected to decline may increase if immigration offsets the deficit.
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Some algae utilize calcium carbonate to:
a. deter herbivores. b. aid in maintaining a proper pH balance. c. assist in photosynthesis. d. replace mucus. e. prevent from freezing.
In what way or ways does or do seedless
vascular plants differ from seed plants?
a. seedless vascular plants do not have a sporophyte stage; seed plants do b. the sporophyte of the seed plants gives rise to gametes; the sporophyte of seedless vascular plants gives rise to spores c. the gametophyte of the seedless vascular plants is free-living; the gametophyte of seed plants is not d. the sporophyte of seedless vascular plants is haploid; the sporophyte of the seed plants is diploid e. the gametophyte of the seed plants form spores; the gametophyte of the seedless vascular plants form gametes
Genetic diseases transmitted only by a mother to both sons and daughters result from ____________________ genes Fill in the blank(s) with the appropriate word(s)
A selecting agent
A. causes mutations. B. selects the conditions an organism lives under. C. lowers the percentage of unfavorable genes in a population. D. None of the answers is correct.