Plants absorb water through tiny hairs that cover the surface of the roots. Water is absorbed by osmosis — the movement of water molecules through a semipermeable membrane from an area of high concentration to an area of low concentration. Transpiration, the release of water vapor through the leaves, is the main force that controls the movement of water through a plant. Transpiration is regulated by the stomata, tiny pores on the underside of leaves that open and close to release water vapor and exchange carbon dioxide and oxygen. When the plant’s water concentration is high, the stomata open to release excess water; when the water level drops, the stomata close to conserve moisture.
Answer:
The correct answer will be option-D.
Explanation:
Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.
Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.
This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.
Thus, option-D is the correct answer.
Nitrogen is a component of chlorophyll and therefore essential for photosynthesis
According to reasearch it isn't possible