Two chromosomes that each have genes for the same characters are . A cell with one copy of each chromosome is . A cell with paired chromosomes is . Alternative versions of a gene that produce distinguishable phenotypes are

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation. c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation. d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation

Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis?