The movement of pollen grains from anther to stigma of the same flower is called:
A. Self-pollination
B. Cross-pollination
C. Anemophily
D. Hydrophily
Answer: Option A
Solution (By JKSSB Mock Tests)
Self-pollination (autogamy) occurs within the same flower or between flowers of the same plant. Cross-pollination (allogamy) involves different plants. Hydrophily is pollination by water, anemophily by wind. Self-pollination ensures genetic uniformity, while cross-pollination promotes variation. Cleistogamous flowers (e.g., groundnut) are obligate self-pollinators.
Explanation:
The pleura consists of visceral pleura (adhering to lungs) and parietal pleura (lining chest wall), with pleural fluid between them reducing friction during breathing. Pericardium surrounds the heart, peritoneum lines the abdominal cavity, meninges cover the brain and spinal cord.
Explanation:
Chlorophyll a is the primary photosynthetic pigment, essential for converting light energy into chemical energy. It directly participates in the light reactions. Chlorophyll b, carotenes, and xanthophylls are accessory pigments that capture additional wavelengths and transfer energy to chlorophyll a. These accessory pigments also protect chlorophyll from photo-oxidation.
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