What is the function of the generative cell in conifers?
A. Maturation of the female cone
B. Production of the archegonium
C. Growth of the megaspore
D. Formation of the sperm
E. Dispersal of the pollen
Answer: D
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What is the relationship between operators, transcription units, and operons?
a. Operators are comprised of transcription units and operons. b. Operons are comprised of transcription units and operators. c. Operators are comprised of multiple transcription units associated with a single operon. d. Operons are comprised of multiple operators associated with a single transcription unit. e. Operons are comprised of multiple transcription units associated with a single operator.
If you forgot to heat fix a smear before doing a Gram stain, which of the following might occur?
A. Gram-positive and Gram-negative bacteria would both stain purple. B. The stains would not adhere to the bacteria. C. The decolorization step of the Gram stain would not work properly. D. The smear may not adhere to the slide.
Dissolved phosphorus in aquatic ecosystems may return to the land via:a
erosion. b. phosphate mining. c. birds eating fish and mollusks. d. zooplankton. e. decomposition
Female peafowl (peahens) prefer to breed with males (peacocks) that have the longest tails. However, the longer the peacock's tail, the less well he can fly and the more likely he is to be eaten by predators
Which of the following statements is TRUE? A) Both sexual selection and natural selection favor shorter tails in peacocks. B) Sexual selection favors longer tails, but natural selection favors shorter tails. C) Sexual selection favors shorter tails, but natural selection favors longer tails. D) Both sexual selection and natural selection favor longer tails in peacocks.