How many different proteins does the ribosome consist of?

	Column $I$		Column $II$
$A$	$\text{UV}$	$i$	Biomagnificatron
$B$	Biodegradable Organic matter	$ii$	Eutrophication
$C$	$\text{DDT}$	$iii$	Snow blindness
$D$	Phosphates	$iv$	$\text{BOD}$

The correct match is:

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In flowering plants meiosis occurs at the time of

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The idea of use and disuse of organs was given by

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A transcription unit in $DNA$ is defined primarily by the three regions in $DNA$ and these are with respect to upstream and down stream end;

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Synergids are

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The terms homothallic and monoecious are used to denote.

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Consider the following statements $(A - D)$ each with one or two blanks.

$(A)$ Some snails go into _____$(i)$_____ to avoid ____$(ii)$_____ related problems.
$(B)$ Since small animals have a ____$(iii)$___ surface area relative to their volume, they tend to lose body heat
_____$(iv)$______ when it is cold outside.
$(C)$ Next to temperature, _____$(v)$____ is the most ecologically important environmental factor.
$(D)$ Every ____$(vi)$____ the famous Keolado National Park in Rajasthan host thousands of migrating birds.
Which one of the following option gives the correct fill ups for the respective blank numbers from $(i)$ to $(vi)$ in
the statements?

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STD 12 - 5. molecular basis of inheritance — Biology STD 12 Science — Question

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