After pollination and fertilization following changes occur in a flower: The petals, stamens, style and stigma of the flower fall off. Sepals dry up and hold the ovary. The ovules confined in the ovary develop into seed
I thinks its cell division
The statement is - True.
The production of the nuclear energy by the nuclear reactors requires lot of water. The water's role is to constantly keep cool the reactors because if they overheat there can be a disaster of big proportions.
Because of the heating up of the water the water changes its properties slightly. Those changes have big environmental impact, easily seen in the local flora and fauna in close proximity to the nuclear reactors. There is way to big of a percentage of bad mutations among the flora and fauna where the water is released from the nuclear reactors, where very often there's animals with either more or less extremities, two heads, weird growth and shape of the plants etc.
The correct answer is option (d) They allow the exchange of gases between cells in the leaf and the external environment.
Stomata are the tiny openings present in the epidermis (outer layer of cells) of the leaf. They have a pore which is guarded by the guard cells which controls the opening and closing of the stomata. Air enters and exits through the stomata.
The main funtion of stomata is to facilitate the gaseous exchange. The gas exchange that occurs when the stomata are open helps in the process of photosynthesis. During photosynthesis, carbon dioxide is taken in from the atmosphere and oxygen is released as a by-product of photosynthesis. The glucose produced is converted into the starch and stored in the leaves.
Also, water vapour diffuses through the stomata into the atmosphere by a process called the transpiration.
Thus, stomata are the structures that are mainly involved in the gaseous exchange between the cells of the leaf and the atmosphere.
