Which event is the most direct (or first) result of natural selection on a population?
A) New alleles are created when confronted with a new environment.
B) Proteins lose some functions.
C) The frequency of some alleles changes in the population.
D) Members of the population start reproducing more rapidly.
C
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Which of the following is not true of nucleic acid and protein structure?
A. Nucleotides are connected through phosphodiester bonds. B. Both proteins and nucleic acids are unbranched polymers. C. When several nucleic acids are joined together, a polypeptide is formed. D. The chemical composition of a nucleic acid helps determine its structure. E. The chemical composition of a protein helps determine its structure.
Reptiles are very efficient in conserving water during excretion
Indicate whether the statement is true or false
Which term refers to the non-living gel-like matrix between the epidermis and gastrodermis of cnidarians?
a. mesoglea b. mesohyl c. medusa d. monoecious
The age structure diagram for countries with a
2.1 total fertility rate is indicated by a. A. b. B. c. C. d. D. e. none of these.