MCQ
Which one of the following is a micronutrient for plants?
- ACalcium.
- BMagnesium.
- ✓Manganese.
- DNitrogen.
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$(A)$ $(B)$
$X$ in the given statement refers to
$(1)$ Urine is hypertonic is distal convoluted tubule
$(2)$ When the urine passes into collecting tubule, it becomes hypotonic
$(3)$ Urine is isotonic in proximal convoluted tubule
$(4)$ Urine becomes more and more hypotonic as it passes through Henle’s loop
$R$ : Bats and whales show echolocation and four chambered heart.