Which of the following changes would be likely to make terrestrial life on this planet impossible
Which of the following changes would be likely to make terrestrial life on this planet impossible
- A
A decrease in mean temperature by $10° C$
- B
Change in atmosphere permitting all the solar radiation reaching the upper atmosphere to penetrate to the surface of the earth
- C
Change in the orbit of the earth from an ellipse to a circle
- D
Disappearance of the moon
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- [AIPMT 2009]
Parasite lives on the other parasite called
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Ozone layer depletion or hole in ozone layer is being found in
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Match Column $I$ with Column $II$ and choose correct option
Column $I$
Column $II$
$a.$ Shallowest depth
$(i)$ Brown algae
$b.$ Intermediate depth
$(ii)$ Green algae
$c.$ Greatest depth
$(iii)$ Red algae
Match Column $I$ with Column $II$ and choose correct option
| Column $I$ | Column $II$ |
| $a.$ Shallowest depth | $(i)$ Brown algae |
| $b.$ Intermediate depth | $(ii)$ Green algae |
| $c.$ Greatest depth | $(iii)$ Red algae |