Which of the following is an example of a genetically modified crop?
A. Brassica napus
B. Sugarcane
C. Triticale
D. Bt cotton
Answer: Option D
Solution (By JKSSB Mock Tests)
Bt cotton is genetically modified by inserting the cry gene from Bacillus thuringiensis, which produces an insecticidal protein toxic to bollworms. Triticale is a hybrid of wheat and rye (not GM per se), Brassica napus is rapeseed (canola) which may have GM varieties, but Bt cotton is a classic example. GM crops include Bt brinjal, herbicide-tolerant soybeans.
Explanation:
The colon (large intestine) primarily absorbs water, sodium, and some vitamins (produced by gut flora) from the indigestible food residue, converting it into semisolid feces. It does not secrete digestive enzymes; that is the small intestine's role. Protein digestion and amino acid absorption occur in the small intestine.
Explanation:
The radicle is the embryonic root, and it is the first structure to emerge from the seed coat during germination, growing downward to anchor the plant and absorb water. The plumule becomes the shoot, hypocotyl connects radicle to cotyledons, cotyledons are seed leaves.
Explanation:
Magnesium is the central atom in the porphyrin ring of chlorophyll, essential for light absorption in photosynthesis. Iron is in heme, calcium structural, cobalt in vitamin B₁₂.
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