Q.
The diagrams show vertical sections of kidneys of coypu, brown rat and kangaroo rat, showing the relative size of cortex and medulla. Coypu are found in freshwater and are never short of water to drink. Brown rats are
able to go some days without drinking. Kangaroo rats are able to live in deserts without drinking at all. Which kidney belongs to which animal?

$A$
$B$
$C$
(a)
Brown rat $\,$
Coypu $\,$
Kangaroo rat $\,$
(b)
Brown rat $\,$
Kangaroo rat $\,$
Coypu $\,$
(c)
Kangaroo rat $\,$
Brown rat $\,$
Coypu $\,$
(d)
Kangaroo rat $\,$
Coypu $\,$
Brown rat $\,$
$A$ | $B$ | $C$ | |
---|---|---|---|
(a) | Brown rat $\,$ | Coypu $\,$ | Kangaroo rat $\,$ |
(b) | Brown rat $\,$ | Kangaroo rat $\,$ | Coypu $\,$ |
(c) | Kangaroo rat $\,$ | Brown rat $\,$ | Coypu $\,$ |
(d) | Kangaroo rat $\,$ | Coypu $\,$ | Brown rat $\,$ |
Excretory Products and their Elimination
Solution: