Using the accompanying illustration and the assumption that half of a plant's sperm and eggs are p and half are P, one
can predict that the chance of sperm p meeting egg P at fertilization is ____.
a. 50%
b. 75%
c. 25%
d. ½ X ¼
e. 100-%
ANSWER: c
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Mercury can serve as a transcriptional activator in the regulation of certain genes
Indicate whether the statement is true or false.
Four of the five chemicals listed below are
related to the light-independent reactions. Select the EXCEPTION.
a. oxygen b. carbon dioxide c. RuBP d. rubisco e. glucose
The following is a description of which type of algae? They spin as they are propelled forward. They possess two flagella, each of which rests within a groove encircling the organism. When moving, the longitudinal flagellum extends behind the cell propelling it forward, while the transverse flagellum beats within its groove and spins the cell.
A) Rhodophyceae B) Alveolata (Dinoflagellates) C) Synurales D) Xanthophyceae (Yellow-Green Algae) E) Chrysophyceae: The Golden-Brown Algae
Cell movement involves the coordination of many events in the cell. Which of the following phenomena is not required for cell motility?
(a) Myosin-mediated contraction at the rear of the moving cell. (b) Integrin association with the extracellular environment. (c) Nucleation of new actin filaments. (d) Release of Ca2+ from the sarcoplasmic reticulum.