The process of removing the anthers from a bisexual flower to prevent self-pollination is called:
A. Emasculation
B. Tagging
C. Bagging
D. Hybridization
Answer: Option A
Solution (By JKSSB Mock Tests)
Emasculation is the removal of stamens (anthers) from a bisexual flower before anthesis to prevent self-fertilization in artificial hybridization experiments. Bagging covers the flower to prevent contamination, tagging labels the cross. Emasculation ensures that only desired pollen is used.
Explanation:
Gastrin is a hormone secreted by G cells in the stomach antrum, stimulating parietal cells to secrete HCl and promoting gastric motility. It is released in response to food in the stomach.
Explanation:
The genetic code is a sequence of nucleotide triplets in mRNA called codons. Each codon consists of three consecutive nitrogenous bases and specifies a particular amino acid or a stop signal during protein synthesis. For example, AUG is the start codon (methionine). Anticodons are the complementary triplets found on tRNA molecules.
Explanation:
Abscisic acid (ABA) is a stress hormone that induces stomatal closure by causing efflux of K⁺ ions from guard cells, leading to loss of turgor, thereby reducing water loss during drought. Auxin and cytokinin promote growth, gibberellin stimulates stem elongation and seed germination. ABA also promotes seed dormancy and leaf senescence.
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