In which of the following cellular organelles
does photosynthesis take place?
a. rough endoplasmic reticula
b. Golgi bodies
c. mitochondria
d. chloroplasts
e. more than one of these organelles is
responsible for photosynthesis
D
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Which statements about the Lake Victoria cichlid fishes are true? Check all that apply.
__X__ The adaptive radiation of the estimated 300 species of cichlid fish was very rapid and took place during the last 200,000 years. _____ The adaptive radiation of the Lake Victoria cichlids may have resulted from a key evolutionary innovation. _____ Speciation of the Lake Victoria cichlids was mainly sympatric. _____ The diversity of the Lake Victoria cichlids continues today because the lake is devoid of predators. _____ Many of the Lake Victoria cichlids have very specialized adaptations that allow them to occupy diverse habitats within the lake.
A way of making multiple copies of a segment of DNA from a single template is known as ________.
Fill in the blank(s) with the appropriate word(s).
The adaptive immune response differs from the innate response in that
A. B and T lymphocytes can each target multiple proteins, whereas the innate response targets only a single type of antigen. B. the adaptive immune response involves physical barriers and nonspecific processes, whereas the innate immune response relies on the actions of B and T lymphocytes. C. the adaptive immune response targets specific immunogens and remembers them, mounting an even stronger response on subsequent encounters, whereas the innate response is nonspecific and has no memory. D. the innate immune response targets a specific immunogen and remembers it to mount an even stronger response on subsequent encounters with that immunogen, whereas the adaptive response is nonspecific and has no memory.
You have identified a new single-celled organism in the laboratory and have observed that new daughter cells remain attached to the parent and then break away. What type of reproduction do you hypothesize that this organism uses?
A) budding B) binary fission C) copulation D) external fertilization