Why is pollen considered an important adaptation to land?
What will be an ideal response?
Both ferns and bryophytes need water for sperm transport. Pollen carries sperm from a male part of a gymnosperm/angiosperm to the female part. Therefore, no water is needed. Pollen allows sperm transport without water.
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You extract DNA from an E. coli cell and observe it is hemi-methylated. Which strand of DNA is older?
A. The methylated strand B. The strand that is not methylated C. Neither—they are the same "age."
The interaction between different species is
a. mutualism. b. parasitism. c. commensalism. d. competition. e. predation.
A thermal inversion refers to
a. a layer of cool air trapped underneath a warm-air layer. b. the temperature of the atmosphere above land as opposed to the temperature of the atmosphere above bodies of water. c. a temperature-induced change in weather patterns. d. the cooling of the atmosphere at night. e. abnormal temperature changes in a season.
In a population of purebred cats, over 75% of the alleles present can be dated back to just 16 individuals belonging to a cat breeder from the late eighteenth century. Based on this, what statement(s) about the cat population are accurate?
A. Mutations rates will be higher in the purebred cat population than in most domestic cat populations. B. Rapid evolutionary change will be seen in the purebred cats over time. C. Further evolutionary change in the purebred cats is unlikely. D. Very little genetic variation exists in the purebred cats. E. Inbreeding has led to high levels of genetic variation in the purebred cats.