Which one of the following nucleotides could base pair with a pyrimidine?
A. uracil
B. cytosine
C. adenine
D. thymine
E. uracil, cytosine, adenine and thymine
Answer: C
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A. vascular cambium. B. cork cambium. C. intercalary meristems. D. ground meristem. E. primary meristem.
A near-uniform population distribution is the result of ____
a. social interaction b. competition for resources c. chemical avoidance d. contact inhibition e. planning
Concentric rings found in the cross section of the wood of trees are known as:
a. summer rings. b. spring rings. c. annual rings.
d. dendrochrons. e. pith rings
Indicate whether the response is due to parasympathetic or sympathetic action.
A. decreases heart rate B. decreases adrenal gland secretions C. slows digestion D. inhibits urination