Which plant hormone is responsible for apical dominance?
A) auxin
B) ethylene
C) cytokinin
D) gibberellin
A
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Charlie, an Angus bull, is heterozygous (Bb) for coat color, where B = black and b = brown. Charlie therefore has a black coat. Black is Charlie's
A) genotype. B) heterozygous state. C) gene conversion. D) phenotype. E) homozygous state.
Type I survivorship curves
a. are characteristics of humans and elephants. b. typify a population in which all ages have an equal chance of survival. c. indicate a high mortality rate in the very young. d. show that very few young are produced, that each is given parental support, and that most individuals live a relatively long life and die of old age. e. are typical of annual plants
Because enzymes affect the speed of chemical reactions without being consumed, they are referred toas:a
hydrogen acceptors. b. activation energy. c. catalysts. d. cytochromes. e. transformation proteins.
Which of the following produces antibiotics?
a) B-cells b) Orthomxyovirus c) Plasma cells d) Pseudomonas aeruginosa