Which statement is true about nitrate(NO3-)?
(a) Nitrate is exclusively accessible for plants by interacting with fungi
(b) Nitrate uptake in plants is an energy dependent process that is facilitated through a proton gradient
(c) Nitrate is first fixed by mycorrhiza before rhizobia make use of it inside the root of a legume
(d) Nitrate is a gaseous form of nitrogen, and cannot be used directly by a plant
Ans: (b) Nitrate uptake in plants is an energy dependent process that is facilitated through a proton gradient
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What would happen if the body did not produce insulin?
A. Cells of the body would neither take in glucose from the bloodstream nor release it into the blood stream. B. Cells of the body would keep on taking glucose from the bloodstream and storing it. C. Cells of the body would not release glucose into the blood stream when glucose levels were low in the blood stream. D. Cells of the body would not be able to take in glucose, even when glucose levels were high in the blood stream.
Run your experiment. Does the plateau region change if the time allowed for photosynthesis is increased?
a. Yes b. No
Respond to statements 90–94 with reference to the flower parts
listed below. a. megaspore b. microspore c. ovule d. ovary e. seed D 90. This structure gives rise to the female gametophyte. D 91. This structure is female and haploid. M 92. This gives rise to haploid pollen grains. D 93. The egg is ultimately derived from this structure. D 94. During early development, the plant embryo is most intimately associated with this structure.
Normally, complement proteins are active until the body is exposed to antigen. Indicate whether the statement is true or false