What would be the effect on phloem transport of a mutation in the sucrose transport protein that caused ATP to not bind efficiently?
A. There would be no effect.
B. Water diffusion into the phloem would
increase.
C. Turgor pressure would be reduced.
D. The direction of the flow of sap would be
reversed.
C
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Which one of the following statements best describes the chromosomes in the cells at the end of meiosis I?
A) DNA replication in the S phase has led to a doubling in chromosome number. B) The cells contain the haploid number of chromosomes. C) Chromosome number and structure are identical to the beginning of the S phase. D) The cells contain the diploid number of chromosomes. E) The chromosome number is the same as that before meiosis began, but the DNA content is half the original cell.
Identify three reproductive isolating mechanisms and briefly outline how each may contribute to the formation of new
species. What will be an ideal response?
GM foods are controversial for many reasons. Which of the following does not represent a controversy between advocates and critics of GM foods?
A) GM foods cause disease in consumers. B) GM foods have an unknown impact on consumers. C) GM foods have an unknown impact on the environment. D) GM foods increase yields on farm land.
What is the shell actually made up of?
What will be an ideal response?