The pigment that gives carrots their orange color and is a precursor of vitamin A is:
A. Xanthophyll
B. Chlorophyll
C. Lycopene
D. Beta-carotene
Answer: Option D
Solution (By JKSSB Mock Tests)
Beta-carotene is a provitamin A carotenoid, giving orange color; the body can convert it to retinol. Lycopene is red (tomato), xanthophyll yellow, chlorophyll green. Carotenoids are accessory pigments in photosynthesis.
Explanation:
The left ventricle has the thickest and most muscular wall of all the heart chambers. This is because it must pump oxygenated blood with high pressure through the aorta to supply the entire systemic circulation of the body. The right ventricle only pumps blood to the lungs, which requires much less pressure.
Explanation:
Gregor Mendel conducted his classic hybridization experiments on garden pea (Pisum sativum) between 1856 and 1863, establishing the fundamental laws of inheritance. He selected seven contrasting characters.
Explanation:
Fucoxanthin is a carotenoid that masks the green chlorophyll in brown algae (Phaeophyceae). Phycoerythrin is red, phycocyanin blue, chlorophyll b green.
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