The process of transferring pollen grains from the anther to the stigma of another flower of a different plant of the same species is: MCQ with Answer and Explanation

The process of transferring pollen grains from the anther to the stigma of another flower of a different plant of the same species is:
A. Dispersal
B. Self-pollination
C. Cross-pollination
D. Fertilization
Answer: Option C
Solution (By JKSSB Mock Tests)
Cross-pollination (allogamy) involves transfer between genetically different plants of the same species, promoting genetic variation. Self-pollination occurs within the same flower or plant. Fertilization is gamete fusion, dispersal is seed/fruit spread. Agents of cross-pollination include wind, insects, water, birds.

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The phenomenon where a single gene mutation affects multiple traits is:
A. Epistasis
B. Codominance
C. Polygenic inheritance
D. Pleiotropy

Correct Answer: Option D


Explanation:
Pleiotropy is when one gene influences several distinct phenotypic characteristics. Example: sickle cell disease (mutant hemoglobin affects RBC shape, causing anemia, pain, organ damage). Polygenic traits involve many genes, codominance both alleles expressed, epistasis gene interaction.

This question belongs to: Science Biology
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The process by which a cell engulfs large particles such as bacteria is:
A. Osmosis
B. Exocytosis
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Correct Answer: Option C


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Phagocytosis is receptor-mediated or non-specific engulfment of large particles, forming a phagosome that fuses with lysosomes. Key in immune defense.

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Which hormone regulates water reabsorption in the kidney collecting ducts?
A. Aldosterone
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D. Parathyroid hormone

Correct Answer: Option B


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