MCQ
Main excretory organs in a frog are
- ASkin
- BLungs
- ✓Kidneys
- DMalphighian tubules
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$(1)$ 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