Answer:
Explanation:
The organic matter present in the soil helps in improving the structure and stability of the soil. This affects in increase in pore size and also increases the volume of the soil.
The effect of organic matter on the following parameters is as follows:
1) Water holding capacity: The increase in pores in the soil will enhance the water holding capacity of the soil. The number of micropores and macropores will increase and this will lead to aggregation of the soil particles and will help in creating the favorable living environment for the soil microbes.
2) Nutrient holding capacity: The capacity of the soil to hold the nutrients that come from fertilizer or from natural sources is the nutrient holding capacity of the soil and it is against the leaching of the minerals from the soil. If the organic content of the soil increases it will readily absorb the nutrients obtain from natural source or from fertilizers. It will allow the nutrient exchange between plants and soil.
Option B, small angle, is the right answer.
The polar areas are also known as the freezing zones are the areas of Earth, are the regions of the planet that encompass its terrestrial poles (the South and North Poles), extending in the polar rings. The term solar radiation is referred to as the electromagnetic radiation released by the sun. In the Polar Zone, the radiations from the Sun hit the surface at a small angle. As a result of this, the distribution of light increases in the atmosphere of the earth.
Answer:b. Facilitated transport
Explanation:in the usual activities of the cell,it's cell membrane is responsible for the movement of substance in and out of the cell.
Such substances include nutrients,water, oxygen etc.
The plasma membrane select the substances that it allows into the cell thus it is said to be selectively permeable.
The plasma membrane of the cell has a phospholipid bilayer made up of cholesterol, proteins and glycoproteins.
The proteins on the membrane are useful for facilitated diffusion.
In this diffusion process,the proteins helps to carry large molecules across the cell membrane.such molecules includes glucose,amino acids etc.
In the process energy is not expended so it is a type of passive transport.
