Paired lungs are characteristic of
a. some fishes.
b. all amphibians.
c. all birds.
d. all mammals.
e. all of these
E
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Why can't a female lizard have both high fecundity and high survival?
A) In only rare cases, lizards have both high fecundity and high survival. B) Female lizards are able to produce only one set of offspring. C) Competition for resources prevents this. D) The more energy the female devotes to offspring, the less that can be devoted to her survival. E) The female is already maximizing the number of eggs she lays, and if she attempts to nest later in the season, there will not be enough food for her young.
If blue light is the component of the visible spectrum that can penetrate to the greatest depth in water, then what should be expected of photosynthetic protists that survive at great depths?
A) They should absorb blue light preferentially. B) They should absorb red light preferentially. C) They should reflect green light preferentially. D) They should absorb white light preferentially. E) They should absorb green light preferentially.
Which of the following contribute to the surface area available for water absorption from the soil by a plant root system?
I) root hairs II) endodermis III) mycorrhizae IV) fibrous arrangement of the roots A) II and III B) I, III, and IV C) I, II, and IV D) I, II, III, and IV
What type of organism has the ability to produce organic compounds from inorganic substances?
A) Consumer B) Fungus C) Heterotroph D) Autotroph