Which of the following is an example of a clone on the organism level?
A. identical twins
B. fraternal twins
C. two plants of the same species
D. offspring with characteristics of both parents
E. chicks hatched from the same mother
A. identical twins
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Gravitropism is a result of:
A. seed orientation at time of germination. B. auxin concentration. C. abscisic acid concentration. D. decreased availability of light as you go deeper into the soil. E. the movement of starch-filled organelles called statoliths. F. auxin concentration and the movement of starch-filled organelles called statoliths.
"Acidic" is an appropriate description for four of the following. Which one is the exception?
a. excess hydrogen ions b. the contents of the stomach c. magnesium hydroxide d. HCl e. a pH less than 7
What kind of bond is formed between the 5? phosphate group of one nucleotide and the 3? hydroxyl (OH) group of the adjacent nucleotide?
A) ionic bond B) phosphodiester bond C) hydrogen bond D) disulfide bond E) hydroxyl bond
Bacteria cannot be classified using the biological definition of a species for which reason?
A. The DNA sequences of all bacteria are more than 97% identical. B. Bacteria cannot reproduce. C. Bacteria are present everywhere and cannot be reproductively isolated from other bacteria. D. Bacteria are asexual. E. Bacteria do not evolve.