Which type of plant hormone generally acts as a growth inhibitor?
A) auxins
B) gibberellins
C) cytokinins
D) abscisic acid (ABA)
Answer: D
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A yogurt, which had "contains live cultures" on its label, was transferred onto an acidic carbohydrate-containing medium for selective enrichment. Eventually, isolates of the ________ genus were obtained
A) Lactobacillus B) Leuconostoc C) Peptococcus D) Streptococcus
When the human genome was sequenced, we learned that there are fewer than expected protein coding genes
(approximately 20,000). Yet, the total number of proteins produced in humans approaches 100,000. What accounts for this discrepancy in numbers?
a. We have not yet identified all of the open reading frames in the human genome. b. We have not yet fully sequenced the human genome. c. mRNA processing mechanisms allowmultiple proteins to be produced from a single DNA sequence. d. Some noncoding DNA sequences encode proteins. e. There has been a gross over-estimation of the number of proteins produced in humans.
A blood vessel is indicated by the letter ____
a. A b. B c. C d. D e. E
A tall plant is crossed with a short plant, and the progeny are all intermediate in size between the two parental plantsIf the intermediate F1 progeny were allowed to self-pollinate, and the F2 progeny were also intermediate in size, but following a normal distribution, this would suggest
A) incomplete dominance. B) polygenic inheritance. C) complete dominance. D) a strong environmental influence. E) codominance..