STD 11 - 4. Animal kingdom — BIOLOGY STD 11 Science — Question

$A$. Presence of a mid-dorsal, solid and double nerve cord.

$B$. Presence of closed circulatory system.

$C$. Presence of paired pharyngeal gill slits.

$D$. Presence of dorsal heart

$E$. Triploblastic pseudocoelomate animals.

Choose the correct answer from the options given below:

$(1)$ $C_4$ plants do not tolerate higher temperature.

$(2)$ $C_4$ plants show a response to high light intensities

$(3)$ $C_4$ plants lack a process called photorepiration.

$(4)$ Productivity of $C_4$ plants is less than $C_3$ plants.

$(5)$ $C_4$ acid $OAA$ is formed in the mesophyll in cells.