In contrast to the cell cycle of adult somatic cells, the dividing cells of an early embryo lack which cell cycle stage(s)?
A. S
B. M
C. interphase
D. G1 and G2
Answer: D
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The principle of species individuality suggests that in response to climate change, species should migrate
A. as individual species. B. as individual ecosystems. C. through a process of primary succession. D. in response to a steady level of disturbance. E. None of these choices are correct.
________ is the second messenger associated with the regulation of blood pressure.
Fill in the blank(s) with the appropriate word(s).
Which of the following organisms belong to the supergroup Amoebozoa?
A. plasmodial and cellular slime molds B. plasmodial and water molds C. choanoflagellates and diplomonads D. amoeboids and euglenoids E. cellular slime molds and radiolarians
Prokaryotic cells are smaller than eukaryotic cells. What is a plausible explanation?
A. Prokaryotic cell walls limit their cell growth. B. Eukaryotes are immobile, allowing them to grow larger. C. Prokaryotes lack the genetic material needed for protein synthesis. D. Eukaryotes have compartmentalization, which allows for specialization. E. Prokaryotes have more diverse energy sources.