MCQ
Which excretory organ is used by humming bird?
- AProtonephridia.
- BNephridia.
- CMalpighian tubules.
- ✓Kidneys.
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$(1)$ $C_4$ 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.