Which of the following features likely accounts for the difference between plant and animal cell cytokinesis?
A) Animal cells lack the microfilaments required for forming a cleavage furrow.
B) Animal cells lack chloroplasts.
C) Plant cells have cell walls.
D) Plant cells have two sets of chromosomes; animal cells have one set of chromosomes.
Answer: C
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The nervous system is capable of modifying its structure and function in a process known as:
a. hard-wiring. b. neural plasticity. c. reflex action. d. tolerance. e. ganglia.
One problem with eradicating invasive species is that sometimes the disturbed area is unable to be colonized by native species
For example, in forests where the invasive plant garlic mustard has been removed, native plants and animals do not recolonize because they are extinct in that patch of forest. How should restoration ecologists increase species diversity and recover ecosystem function? A) Introduce tertiary consumers. B) Develop movement corridors for primary producers. C) Develop movement corridors for species with similar niches. D) Eliminate keystone species.
Which one of the following options applies to chytrids?
A. form basidia during sexual reproduction B. are the source of penicillin C. form symbiotic relationships with algae D. have flagellated gametes
Answer the following questions true (T) or false (F)
1. All other levels of protein structure are dictated by the primary structure. 2. A nucleotide is a polymer of nucleic acids. 3. Every form of life is either a single cell or is composed of cells.