Speculate on the possibility of life on other planets. Use representatives of the hyperthermophilic Archaea and hydrogen chemolithotrophs as a guide to this discussion
What will be an ideal response?
Answer: Answers will vary, but the environment described should match the temperature tolerances of the Archaea thriving in the location. Energetic strategies mentioned should also correspond with compounds present in the environment. For example, hyperthermophilic, chemolithoautotrophic, hydrogen-oxidizing Archaea could potentially thrive on a planet containing H2 in its 120 °C atmosphere.
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In some fungi, such as the bread mold Neurospora crassa, the arrangement of spores in the ascus directly reflects the order in which they were produced during meiosis. What is the collection of spores produced by meiosis in Neurospora crassa called?
A) unordered tetrad B) unordered octad C) ordered tetrad or ordered octad D) ordered pentad
The feature that most clearly separates eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells.
a. ribosomes b. oxidative phosphorylation c. DNA molecules d. a nucleus
Which of the following microorganisms associated with food poisoning thrives in cold storage?
A) Salmonella spp. B) Shigella spp. C) Clostridium botulinum D) Escherichia coli E) Listeria monocytogenes
Based on the fossil record, which of these groups appeared first?
a. chimpanzees b. humans c. new world monkeys d. gorillas e. old world monkeys