Which of the following is NOT possible for
incomplete flowers?
a. self-pollination
b. attract pollinators
c. form seeds
d. form fruits
e. all of these are possible for incomplete
flowers
E
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How do modified and unmodified histone subunits become distributed among nucleosomes after replication?
A. The newly synthesized DNA strand contains unmodified histone subunits, while the old strand retains the modified histones. B. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A histones, followed by mixtures of H2B, H3, and, finally, H4. C. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A and H2B histones, followed by mixtures of H3 and finally mixtures of H4. D. Both strands of DNA retain H3-H4 modified pairs, and then are repopulated with unmodified H3-H4 pairs, followed by modified and unmodified H2A-H2B. E. Both strands of DNA retain H2A-H2B modified pairs, and are then repopulated with unmodified H2A-H2B pairs and then mixtures of modified and unmodified H3-H4 pairs.
The figure below shows three mouse populations and their associated changes in the frequency of B, the allele for dark fur. The recessive b allele codes for white fur. After 20 generations, in which population would you be most likely to encounter a white mouse?
A. N1
B. N2
C. N3
D. There is an equal probability of encountering a white mouse in all three populations.
E. There is an equal probability of encountering a white mouse in populations N1 and N3 and this is higher than in N2.
Slime molds are classified as Amoebozoa
Indicate whether the statement is true or false.
Which of the following creates the least amount of soil erosion?
A) deforestation B) poor landscaping practices that expose the land to excess wind C) overgrazing by livestock D) use of drip irrigation systems E) wetland destruction