Answer:
Variations Within Ecosystems
Ecosystem diversity can be described as a term which is used o describe the changes within an ecosystem and the impact these changes have on the environment and humans.
Variations within an ecosystem can cause genetic drifts. Variations will cause those organisms to survive which are better adapted to survive to the changes which occur in an ecosystem. And the organisms which are not better suited become extinct over a period of time. Hence, this will lead to a wide rise in biodiversity.
Answer:
The correct answer is- iodine
Explanation:
Thyroid glands is an important endocrine gland of the body which release hormone called thyroid hormone in the blood. It plays an important role in metabolism, brain development, and function, muscle control, etc.
The active form of thyroxine is triiodothyronine and the formation of thyroid hormone requires the availability of iodine. Four iodine atoms are present in thyroxine and 3 is present in triiodothyronine. Without iodine, they can not be produced.
Therefore iodine is the essential element that is required for the manufacturing of thyroxine and triiodothyronine.
Answer:
A.occurs when part of a chromosome breaks off and is placed into the middle of another chromosome
Explanation:
Edge 2020
The respiratory membrane is made of two layer that comes from alveoli and the blood vessel. Oxygen and carbon dioxide will diffuse between the layer. The rate of diffusion can be influenced by the gradient of the gas concentration, the surface area of the reaction and the distance between the vessel and alveolus.
The thin membrane will reduce the distance of the diffusion, thus increasing the diffusion rate.
A thicker membrane will impede the speed of the diffusion, makes the respiratory organ function decline. This can be observed when the lung inflammed(by infection, cancer or other cause), makes the fluid from blood vessel enter the interstitial space.
Answer:
Answer is option A.
reservoir - penstock - turbine - generator - transformer - electrical lines
Explanation :
The most important parts of a hydroelectric power plant are the dam and the reservoir. The dam which is built on a large river, has a reservoir placed behind it to store water. The height of the water in the reservoir is directly proportional to the maximum possible potential energy from the water. The penstock is a long pipe or shaft which transfer the water from the reservoir to the power generation unit. Thus the water in the penstock has potential energy due to its height and kinetic energy due to its motion. The power generation unit contains turbines and generator. This water falls on the blades of the turbine which causes the blades to rotate. Thus the kinetic and potential energy of water is converted into the rotational motion of the turbine blades. The rotating blades causes the rotational motion of the turbine shaft, which is enclosed inside the generator where the electricity is produced. The rotational motion of the turbine shaft inside the generator generates magnetic field which is converted into alternating current by electromagnetic field induction. The transformer converts this electricity into a higher voltage which is then fed into power lines for distribution.
