Which is a benefit of living in a group?
a. Cooperative response to an attack
b. Ability to mount a more formidable defense.
c. More eyes to watch for predators.
d. All of these choices.
e. More individuals who can help counterattack a rival group.
d
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You have discovered a new coccoid-shaped microorganism with no nucleus, a rigid cell wall, and a diameter of 2 µm. Chemical tests reveal that its cell wall does NOT contain peptidoglycan. The new microorganism is
A) most likely a bacterium. B) most likely a eukaryote. C) most likely an archaeon. D) either a bacterium or an archaeon.
The first bacterium that was clearly identified as the cause of an infectious disease was:a
Legionella pneumophila, which causes Legionnaires' disease. b. Chlamydia sp., which causes pelvic inflammatory disease in women. c. Clostridium botulinum, which causes botulism. d. Vibrio cholerae, which causes cholera. e. Bacillus anthracis, which causes anthrax.
A solid waste (garbage) transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?
a. smooth ER b. rough ER c. lysosome d. nucleus
Approximately what percentage of the human genome consists of noncoding DNA?
A) 98% B) 87% C) 77% D) 67%