Microfilaments are made of ________
A) actin
B) tubulin
C) intermediate proteins
D) phospholipids
A
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The first known fossils of living cells were preserved in rocks that are 3.5 billion years old, but scientists postulated that the first cells arose many millions of years prior to this time. These first cells were most likely ...
A. aerobic, photosynthetic, eukaryotic. B. aerobic, photosynthetic, prokaryotic. C. anaerobic, heterotrophic, prokaryotic. D. anaerobic, heterotrophic, eukaryotic. E. anaerobic, chemotrophic, eukaryotic.
In every physical or chemical change, energy cannot be created nor destroyed. This is the ________ law of thermodynamics.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements regarding Campylobacter jejuni is incorrect?
A. It produces an enterotoxin that stimulates diarrhea. B. It infects the stomach. C. It is transmitted through ingestion of contaminated chicken, meat, milk, or water. D. It causes fever and a watery to bloody diarrhea. E. The cells are gram-negative, curved rods with darting motility.
You've finished your homework, so you settle into your favorite chair to play your video games. "Going into your Skinner box?" your roommate jokes. What does a video game have in common with the traditional Skinner box? (Check all that apply)
A. rat subjects B. involves voluntary behavior by the subject C. involves involuntary behavior by the subject D. conditioned stimulus is associated with a reward E. rapid feedback F. food pellets are dispensed G. repeated series of actions and rewards