Answer the following statements true (T) or false (F)
1. In aquatic ecosystems, zooplankton are consumed by phytoplankton.
2. Zooplankton are heterotrophs.
3. Biomass is always highest at the lowest trophic level of a food web.
4. Most of the Earth's phosphorus is trapped in sedimentary rocks.
5. Assimilation is the process by which inorganic substances are incorporated into organic molecules.
1. FALSE
2. TRUE
3. FALSE
4. TRUE
5. TRUE
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A new organism was identified that contained arsenic in place of phosphate in its DNA double helix structure. Based upon this information alone, it can be determined that this change will greatly alter the information encoded by this genetic material.
Answer the following statement true (T) or false (F)
Chemolithotrophs generally derive ________ ATP from oxidation of inorganic substrates because the reduction potentials of those substrates are much more ________ than the reduction potential of organic substrates.
A. less; negative B. more; negative C. less; positive D. more; positive
Which of the following statements about communication in the White-Crowned Sparrow is not correct?
A. The White-Crowned Sparrow's song is an advertisement display behavior. B. The White-Crowned Sparrow's song is learned by imprinting, a sensitive period that takes place about 10–50 days after hatching. C. During the learning phase, the White- Crowned Sparrow's subsong is a sequence of unstructured twittering. D. If a tape of another species song, for example the Swamp Sparrow, is played during the sensitive period, the White- Crowned male will learn that song. E. If deprived of hearing the adult male's song during the early sensitive period, the bird will continue to sing an unstructured twittering throughout its life.
The enzyme that directly converts NADP+ to NADPH is
A. ferredoxin. B. NADP reductase. C. plastocyanin. D. RUBISCO. E. cytochrome complex.