Heat energy of plants is measured in

Given below are two statements.
Statement-$I$: Conversion of pyruvic acid to acetaldehyde in prokaryotes occurs in cytoplasm.
Statement-$II$: Conversion of pyruvic acid to acetyl CoA in eukaryotes occurs in mitochondria.
In the light of above statements,choose the correct answer from the options given below.

Which of the following statements regarding hydathodes is correct?

In the sieve elements,which one of the following is the most likely function of $P-$ proteins?

Given below are some reactions and the enzymes involved. Identify the $CORRECT$ pairs.

Column $I$	Column $II$
$a.$ Fructose $1,6$-diphosphate $\rightarrow$ $3$-$PGAL$ + $DHAP$	$i.$ Enolase
$b.$ Citrate $\rightarrow$ $CIS$-aconitate	$ii.$ Thiokinase
$c.$ Succinyl $CoA$ $\rightarrow$ Succinate	$iii.$ Aconitase
$d.$ $2$-$PGA$ $\rightarrow$ $PEP$	$iv.$ Aldolase

If oxygen content is reduced to $1\%$,the rate of respiration becomes