You are a landscape architect working on the grounds of a large estate. After you plant a dozen trees, the owner says, "There's been a mistake. The flowers on some of these willow trees look totally different! I specifically asked for Salix alba. You must have planted two different species." You refer to your tree guide, and read: "Salix alba - species of willow native to Europe and Asia, noted for the white undersides of leaves. Insect pollinated, dioecious. Grows 10-30m tall." How do you respond to the client?
A. "Don't worry, the trees with the smaller flowers just haven't undergone phase change yet."
B. "Don't worry, Salix alba is dioecious, meaning each tree has either male or female flowers. That is why they look different."
C. "Sorry about that sir, I will dig up the wrong trees right away."
D. "Don't worry, when the shorter trees reach full size, they will grow the other kind of flower."
Answer: B
You might also like to view...
A flower with petals, sepals, and one carpel but no stamens is
a. perfect and incomplete. b. imperfect and complete. c. imperfect and incomplete. d. perfect and complete. e. sterile
Which of the following causes of behavior is classified as an ultimate cause?
a. genetic b. cellular c. physiological d. anatomical e. adaptive
In which phase of mitosis do chromosomes
arrive at opposite sides of the cell?
a. anaphase b. prophase c. metaphase d. telophase e. interphase
One characteristic that makes Caenorhabditis elegans attractive for developmental studies is:
a. its small, transparent body. b. the extensive number of genes shared with humans. c. the developmental defects that occur in this organism. d. the close evolutionary relationship between this mammal and humans. e. the presence of zygotic segmentation genes, similar to those found in humans.