Answer:
Option-D
Explanation:
A plant leaf is a photosynthetic organ of the plant which contains the chlorophyll pigment. The plants have the ability to form new leaves or young leaves when the older leaves shed away.
The younger and older plant leaves can be distinguished on the basis of their color.
The younger leaves as they grow to appear darker due to the presence of higher number of chlorophyll pigments which imparts green color. But as the leaves got older, the color of the leaves changes to yellow as they necrosis leads to the death of the leaves and the anthocyanin pigment imparts yellow color.
Thus, Option-D is the correct answer.
Genetic is a unit of heredity
Answer: Ozone Layer Protection . Ozone layer (stratospheric ozone) is a high concentration of ozone molecules about 30 to 50 km altitude. The main function of the ozone layer is to absorb the Sun’s ultraviolet radiation
Valance electrones are located in the very last shell of the perticular atom. And hence, the shell is known as valance shell of the atom.
Answer:
Average speed is distance divided by time. Velocity is speed in a given direction. Acceleration is change in velocity divided by time.
Explanation: