Which of the following is functional for protection against the environmental abiotic factor of temperature or for thermoregulation of the living body during winter or summer?

Which two of the following changes $(i-iv)$ usually tend to occur in plain dwellers when they move to high altitudes ($3,500 \ m$ or more)?
$(i)$ Increase in red blood cell size
$(ii)$ Increase in red blood cell production
$(iii)$ Increased breathing rate
$(iv)$ Increase in thrombocyte count
Changes occurring are

Body compensates for low oxygen availability at high altitudes by:
$I.$ Increasing $RBC$ production
$II.$ Decreasing the binding affinity of haemoglobin
$III.$ Increasing the binding affinity of haemoglobin
$IV.$ Increasing the breathing rate
$V.$ Decreasing the breathing rate
Choose the correct option for the given statement.

Which of the following plants is able to show rolling of leaf during the middle of the day?

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.

In humans, respiration occurs in the following steps. Arrange these steps in the correct order.
$A$. Diffusion of $O_2$ and $CO_2$ between blood and tissues
$B$. Diffusion of $O_2$ and $CO_2$ across alveolar membrane
$C$. Pulmonary ventilation by which atmospheric air is drawn in and $CO_2$ rich alveolar air is released out
$D$. Cellular respiration
$E$. Transport of gases by the blood