Assertion (A): Pea plants were chosen by Mendel for his experiments. Reason (R): Pea plants have many contrasting characters and are self-pollinating. MCQ with Answer and Explanation
Assertion (A): Pea plants were chosen by Mendel for his experiments.
Reason (R): Pea plants have many contrasting characters and are self-pollinating.
A. Both A and R are true, and R is the correct explanation.
B. A false, R true.
C. A true, R false.
D. Both A and R are true, but R is not the correct explanation.
Answer: Option A
Solution (By JKSSB Mock Tests)
Mendel selected Pisum sativum because it had distinct contrasting traits, was easy to cultivate, and was naturally self-pollinating, allowing controlled crosses. R explains A correctly.
Explanation:
The loop of Henle creates a countercurrent multiplier system in the medulla, establishing an osmotic gradient that allows the collecting duct to reabsorb water and produce concentrated urine. The other parts handle filtration, reabsorption, and secretion.
Explanation:
Fucoxanthin is a carotenoid pigment found in brown algae (Phaeophyceae) that gives them their characteristic brown or olive-green color, masking the green chlorophyll. Phycoerythrin is red (red algae), phycocyanin blue (cyanobacteria, some red algae). Brown algae include kelps and Fucus.
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