Evolution _____________. (Mark true (t) or false (f) for each statement.)
____ is a change in allele or genotype frequency over time
____ always results in a visible change in the physical characteristics of an organism
____ is a process that takes many, many generations
____ is only seen in unicellular organisms
____ is a natural phenomenon that is outside the influence of humans
____ can only occur in the natural environment
____ is not seen in domesticated animals
____ always results in an increase in an organism's fitness
____ is inherently random in nature
____ acts on animals but not plants
What will be an ideal response?
t is a change in allele or genotype frequency over time
f always results in a visible change in the physical characteristics of an organism
t is a process that takes many, many generations
f is only seen in unicellular organisms
f is a natural phenomenon that is outside the influence of humans
f can only occur in the natural environment
f is not seen in domesticated animals
f always results in an increase in an organism's fitness
t is inherently random in nature
f acts on animals but not plants
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Some cyanobacteria form ________, which are comprised of chains of bacterial cells that are in close contact with one another over a large area.
A. mycelia B. trichromes C. cell mats D. hypha
A prokaryotic cell
A. has a cell wall made of chitin. B. is at least 10 micrometers in diameter. C. does not have a nucleus. D. has membrane-bounded organelles. E. has a nucleus.
A protective layer made of rigid or elastic protein strips surrounding the cell membrane of euglenoids is a
A. flagellum. B. pseudopodium. C. pellicle. D. gullet. E. cell wall.
What are the possible phenotypes of the children if the mother has Type A blood and the father has
type AB blood? (Use the Punnett square to verify your answer.) a. all AB b. A, B c. A, AB d. A, B, AB e. A, B, O