The ________ is a flagellated cell that sweeps water through a sponge's body
A) choanocyte
B) amoebocyte
C) spicule
D) spongin
Answer: A
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The ____ acquired plastids through primary endosymbiosis
a. stramenopiles b. red algae c. dinoflagellates d. ciliates e. euglenoids
In DNA and RNA, the polymers are polynucleotides and the monomers are _____________.
Fill in the blank(s) with the appropriate word(s).
When a patch of land is cleared in a tropical rainforest, the vegetation is often burned to enrich the soil with nutrients from the burned plant material. What description applies to this situation?
A) This works well because so many nutrients are trapped in tropical plants. B) This works for a few years, but the soil is soon depleted of nutrients. C) This isn't necessary because tropical soils are filled with nutrients. D) This helps to promote long-term sustainable agriculture.
A friend declares that chromosomes are held at the metaphase plate by microtubules that push on each chromosome from opposite sides
Which of the following observations does not support your belief that the microtubules are pulling on the chromosomes? (a) the jiggling movement of chromosomes at the metaphase plate (b) the way in which chromosomes behave when the attachment between sister chromatids is severed (c) the way in which chromosomes behave when the attachment to one kinetochore is severed (d) the shape of chromosomes as they move toward the spindle poles at anaphase