Flatworms are most closely related to the ________
A) cnidarians
B) annelids
C) echinoderms
D) arthropods
B
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All ecosystems need energy. What is the originating source for most of the energy that powers ecosystems on this planet?
A. Potential energy B. Geothermal energy C. Solar energy D. Wind energy
How are parasitoids different from typical brood parasites?
a. they are usually not insects b. they affect only plants c. they lay eggs inside a host, which is eventually killed d. they fool another species into caring for their young e. they usually only affect the eggs of birds
What would be an expected feature of a plasma membrane that had no integral membrane proteins?
A. the membrane would have no fluidity B. the membrane would not associate with peripheral membrane proteins C. the membrane would have no cholesterol D. the membrane would be unable to transport sodium ions E. the membrane would collapse
Which of the following is the correct order for the four main stages of mitosis?
A. prophase, anaphase, metaphase, telophase B. metaphase, telophase, prophase, anaphase C. prophase, metaphase, anaphase, telophase D. anaphase, prophase, metaphase, telophase