In liverworts, what is the gemma cup?
a. fat-knoblike structure that attaches the sporophyte to the gametophyte
b. small, broken piece of leaf fragments by which liverworts asexually reproduce
c. fibrous, anchoring hair on the underside of the thallus
d. the liverwort female gametophyte
b. small, broken piece of leaf fragments by which liverworts asexually reproduce
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A thin filament of muscle is composed primarily of the protein
A. hemoglobin. B. myosin. C. myoglobin. D. actin. E. pectin.
Which of the following represents a blind study?
A) The test group knows whether they are receiving a placebo or the actual treatment, and so do the researchers. B) The test group does not know whether they are receiving a placebo or the actual treatment, but the researchers do. C) The test group knows whether they are receiving a placebo or the actual treatment, but the researchers do not know until all the data are collected. D) Neither the test group nor the researchers know whether the test group is receiving a placebo or the actual treatment until all the data are collected.
ATP is an energy carrier. Where is the energy actually located?
A) Between the sugar and the phosphate B) Attached to the nucleotide C) In the bonds between phosphate groups D) Attached to the phosphate group E) Inside the phosphate
In which situation would you expect the interacting parties not to cooperate?
A. Individuals are unlikely to encounter each other again in the future. B. An individual that provides assistance in the present will in turn be assisted in the future. C. The individuals have a history of repeated social interactions. D. The individuals are closely related. E. Individuals are part of a social group in which noncooperating individuals are punished.