How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?
A. Membranes are used by cells to catalyze reactions.
B. Membranes are used by cells to store genetic information.
C. Membranes protect a cell from high temperatures and pressures in the environment.
D. Membranes are used by cells to isolate their contents from the environment.
E. Membranes protect a cell from gases in the atmosphere
Answer: D. Membranes are used by cells to isolate their contents from the environment.
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An important message from the work of Thomas Malthus that influenced Charles Darwin was
A. animals tended toward "human perfection." B. only a fraction of any population will survive and reproduce. C. population size of humans can only increase linearly. D. inheritance of acquired characteristics. E. none of these. Charles Darwin was influenced by John Ray not Thomas Malthus.
Which embryonic tissue is INCORRECTLY
associated with its derivative?
a. skin from mesoderm b. nervous system from ectoderm c. liver from endoderm d. circulatory system from mesoderm e. muscles from mesoderm
Wastes would accumulate and most nutrients would stop cycling if which organism(s) within an ecosystem died?
a. protozoans and protistans b. bacteria and fungi c. flatworms, roundworms, and earthworms d. insects e. top carnivores
Which was common to experiments done by Avery and colleagues as well as Hershey and Chase?
A. Bacterial cells B. Escherichia coli C. Virulent bacteriophage D. Radioactive DNA E. Radioactive protein