If each tree contained fewer insects, the bird should spend more time feeding on a tree before searching for a new tree.
a. true
b. false
Answer: a. true
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What process is responsible for creating the material commonly known as wood?
a. apical dominance b. primary growth c. secondary growth d. transpiration
Gause's principle of competitive exclusion is based on the idea that ____
a. larger organisms exclude smaller ones through competition as in the case of large trees controlling underbrush b. competition for the same resources excludes species having different life styles. c. no two species can occupy the same niche indefinitely when resources are limited d. two species can coexist if their niches do not overlap e. species survival depends upon coevoloution
The inner mitochondrial membrane contains numerous inward folds called cristae, which greatly increase the surface area of this membrane. Because ATP is produced on the inner mitochondrial membrane, cristae enhance the ability of the mitochondria to generate ATP. What structure can be thought of as similar to these cristae?
A. Cartilage B. Bronchiole C. Finger-like projections of a human's small intestine D. Spiracle
In humans, when the eye focuses on a nearby object, the lens
A) becomes more rounded. B) gets less transparent. C) gets more transparent. D) does not change. E) flattens.