Choose correct pair :
$(1)$ Salt concentration in inland water - $30-35\%$
$(2)$ Salt concentration in the sea - $5\%$
$(3)$ Salt concentration in hypersalinelagoon - $>100\%$
$1$ and $2$
Only $2$
Only $1$
Only $3$
If there was no $CO_2$ in the earth’s atmosphere, the temperature of earth’s surface would be
Define stenohaline species.
Define phenotypic adaptation. Give one example.
Match Column $I$ with Column $II$ and choose correct option
Column-$I$ | Column-$II$ |
$a.$ Aestivation | $(i)$ Over wintering |
$b$. Hibernation | $(ii)$ Over summer |
$c.$ Diapause | $(iii)$ Suspended development in zooplanktons |
Biological concept of species is mainly based on