Based on the endosymbiosis theory that highlights where chloroplasts come from, how would you expect chloroplasts to divide when a plant cell divides?
A) Via mitosis
B) Via meiosis
C) Via binary fission
D) Via endosymbiosis
C
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Each species in a community has its own __________, or way of living. Fill in the blank(s) with the appropriate word(s)
Why is ocean acidification problematic for some marine life?
A. It decreases the stratification of water temperatures, so that marine organisms have smaller ranges in which to survive. B. It decreases the availability of oxygen in the water for the respiration needs of aquatic organisms. C. The acidification causes metals to precipitate out of the water and deposit on the backs of aquatic organisms. D. It decreases the amount of carbonate in the oceans, making the creation of shells and other hard structures difficult for marine life.
In order for familial retinoblastoma to appear in the phenotype
A. one new mutation must occur in a normal tumor suppressor gene B. two new mutations must occur in a pair of normal tumor suppressor genes C. one new mutation must occur in a proto-oncogene D. an oncogene must mutate to a tumor suppressor gene
How is methylation of DNA maintained following DNA replication?
What will be an ideal response?