Which structure is not concerned with breathing in a frog?

Rate of breathing in a newborn is about . . . . . . times per minute.

Match Column-$I$ and Column-$II$ with respect to processes involved in respiration with their explanation:

Column-$I$	Column-$II$
$i$. Cellular respiration	$a$. Exchange of gases $O_2$ and $CO_2$ between blood and tissue cells.
$ii$. Breathing	$b$. Physical process of gaseous exchange between atmospheric air and lungs.
$iii$. Internal respiration	$c$. Gaseous exchange between alveolar air and blood capillaries.
$iv$. External respiration	$d$. Food is oxidized and $ATP$ is generated.

Read the steps of respiration and arrange them in the correct sequence.
$I$ - Transport of gases by blood.
$II$ - Utilization of $O_2$ by cells for catabolic reactions and release of $CO_2$.
$III$ - Diffusion of gases across the alveolar membrane.
$IV$ - Diffusion of $O_2$ and $CO_2$ between blood and tissues.

The scientist who proposed that the production of glycolic acid in guard cells is an important factor in stomatal opening is:

Whales are air-breathers but can live underwater for a long time because they possess: