The most abundant cytoskeletal elements are ____
a. intermediate filaments
b. flagella
c. microtubules
d. microfilaments
e. centrioles
ANSWER: c
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How is the adaptation of investing more energy in producing large offspring beneficial in the Atlantic mollies?
A. Larger-sized offspring can avoid predation by other species. B. Larger-sized offspring have increased swimming ability for accessing food in toxic or dark conditions. C. Larger-sized offspring mature to reproductive age at a faster rate. D. Larger-sized offspring can migrate easier among the stressful and nonstressful environments. E. All of the answer choices are correct.
The sense of hearing in both invertebrates and
vertebrates is dependent on a. fluid displacement. b. hair bending. c. echolocation. d. vibration of a membrane. e. all of these.
Since adult mouse models of Huntington disease (HD) contain a mutant HD allele, they show symptoms of cell death
in the ____________________ system. Fill in the blank(s) with the appropriate word(s).
Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and buoyancy of water provides physical support. What part did plants evolve to absorb water and minerals on dry land?
A. stomata B. pollen C. vascular tissues D. cuticle E. lignin