In a field experiment, autotrophs are provided a 14C-labelled carbon compound for photosynthesis. Radioactivity (14C) levels were then monitored at regular intervals in all the trophic levels. In which ecosystem is the radioactivity likely to be detected in longer time at the higher trophic level?

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#Question id: 20102

#XL - P Chemistry

The enthalpy change for a given reaction at 298 K is – x J mol^–1 (x being positive). If the reaction occurs spontaneously at 298 K, the entropy change at that temperature

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#Question id: 11585

#XL - T Zoology

Osteoporosis is a condition in which the density of bones is decreased so much that the individual is at a higher risk of fractures. The more calcium in the bones, the better the bone density. Which of the following would produce the greatest increase in bone calcium levels?

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#Question id: 11638

#XL - S Microbiology

Which group includes members that are important primary producers in ocean food webs, causes red tides that kill many fish, and may even be carnivorous?

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#Question id: 3457

#XL - T Zoology

The idea that monogamy is enforced on females by males who guard them against mating with other males known as

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#Question id: 16490

#XL - T Zoology

Significance of producing transgenic plants are aimed at producing