If ATP used by this plant is labeled with radioactive phosphorus, which molecule or molecules of the Calvin cycle will be radioactively labeled first?
A) B only
B) B and C only
C) B, C, and D only
D) B and E only
E) B, C, D, and E
Ans: D) B and E only
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Which type of modified stems are typical of plants that historically have needed to protect themselves from mammalian herbivores?
A) blades B) tubers C) stolons D) thorns E) rhizomes
Sexual reproduction involves ____
a. one diploid cell fertilizing a haploid cell b. the union of two somatic cells c. the union of male and female gametes d. a single mitotic division of the parent cell to produce a daughter cell e. the union of two gametes to produce a haploid zygote
Answer the following statements true (T) or false (F)
1.Freshwater fish lose water by osmosis. 2.Saltwater fish lose water by osmosis. 3.Countercurrent exchange is used for homeostasis both by some animals experiencing cold conditions and by kidneys in the nephron loop. 4.Dilation of blood vessels in extremities can help animals lose excess heat as part of thermoregulation. 5.One reason for homeostasis in body temperature is that excessively high temperature can lead to protein denaturation and loss of protein function.
The Gram staining procedure is best described as a(n) _______ staining technique.
A. acid fast or Ziehl-Neelson B. differential C. capsule D. Schaefer-Fulton E. simple