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Questions in biology

[Answered] Furthermore, ALL organic molecules on Earth can best be described by which of the following statements? A. Organic molecules are naturally produced on earth. B. Organic molecules on earth are all safe and necessary for life on earth. C. Not all organic molecules are natural and safe for life on earth.

[Answered] What causes the 'lub' sound in heart sounds? A) Atrial contraction B) Ventricular contraction C) Closing of the semilunar valves D) Closing of the AV valves

[Answered] What substance triggers the formation of fibrin from fibrinogen? A) Collagen B) Calcium ions C) Prothrombin D) Thrombin

[Answered] A national study of more than 3,000 Americans ages 25 through 72 (Brim, 1999) found that those in midlife (ages 40 to 60) were A. not more likely to experience a crisis than at other ages and less likely to be nervous than younger adults B. more likely to experience a crisis than at other ages C. more likely to experience a crisis than at younger ages D. less likely to experience a crisis than older adults and more likely to experience a crisis than younger adults

[Answered] Using the data from the chart like the one below from your lab handout, under which 2 colors of light did lettuce plants have the most amount of growth? Using the data from the chart like the one below from your lab handout, under which 2 colors of light did lettuce plants have the most amount of growth? Blue Green Violet Orange

[Answered] As a result of advances in biotechnology, __________ may become a thing of the past. A. joint replacements B. disease C. pollution D. hunger

[Answered] What is the weight and size of the Great Indian Bustard?

[Answered] Which of the following statements about brain development is TRUE? A. Once a child is born, the brain does NOT really change very much. B. The brain has a high level of plasticity during childhood. C. The networking of the brain is mostly complete at birth. D. All of these statements are true.

[Answered] Line graphs that indicate time along the x-axis can be used to predict what would happen to dependent variables in an experiment at a later point in time if: A. the existing line shows an upward trend. B. the existing line shows a downward trend. C. a new variable was introduced to the experiment. D. the experiment continued under the same conditions.

[Answered] What do you think genetic diversity means? How is it similar to or different from genetic variation?