Which molecule is used to fuel all energy dependent cellular processes?
a. ATP
b. Protein
c. Water
d. Cytoplasm
e. UV light
Answer: a. ATP
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Protobionts are thought to be the first nonliving structures that evolved into living cells. A critical characteristic of a protobiont that is found in both modern day prokaryotes and eukaryotes is
A. internal compartments that subdivide metabolic functions. B. a boundary membrane that separates external from internal environments. C. the ability to exclude all organic substances. D. the ability to fuse with any other protobiont for reproduction. E. the ability to recognize other protobionts for developmental purposes.
Two species of Gelsemium spp., a flowering vine plant, share the same habitat and have similar insect pollinators. However, pollination occurs for Gelsemium semperviren from mid-January to late March, and for Gelsemium rankinii from late March to mid-April. This represents
A. gametic isolation. B. a process analogous to behavioral isolation in animals. C. temporal isolation. D. ecological isolation. E. mechanical isolation.
A community
a. includes all populations of all species in a given area. b. features the living organisms interacting with the physical and chemical environment. c. is the sum of all places in Earth's atmosphere, crust, and waters where organisms live. d. includes members of only one species. e. is at a higher level of organization than an ecosystem.
Organisms that produce all of their offspring in a single event are
A. never successful. B. seasonally iteroparous. C. semelparous. D. always successful. E. continuously iteroparous.