Which of these characteristics is not found in both land plants and green algae?
1.cellulose in their cell walls
2.produce spores in sporangia
3.store energy captured during photosynthesis as starch
4.light-absorbing pigments include both chlorophyll a and chlorophyll b
2
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Following treatment with restriction enzymes, what procedure would be used to isolate DNA fragments of different lengths?
A. transformation B. transfection C. gel electrophoresis D. colony hybridization E. Western blotting
A cigarette smoker with lung cancer will not pass any smoking-induced lung cancer mutations to his children because the smoking-induced mutations
A. are in somatic cells. B. are in gametes. C. do not affect the phenotype of the lung cells. D. are in germ cells. E. are not in DNA.
Answer the following statements true (T) or false (F)
1.The cohesion-tension theory explains how water moves within a plant. 2.Mycorrhizal fungi decrease the ability of a plant's roots to absorb water. 3.Water is pulled from a plant's roots to its leaves by transpiration. 4.The part of the roots that forces water to enter cells and move into the xylem is the Casparian strip. 5.Most plants prevent nighttime transpiration by keeping their stomata closed. Cacti open their stomata at night; therefore, transpiration can occur at that time
The science of comparative genomics to study human gene function is possible because much of the human genome is
conserved among other closely related species. Indicate whether the statement is true or false.