Answer:
geocentric model
Explanation:
Answer:
Cenozoic era
Explanation:
The geological time scale consists of three eons: Archaean, Proterozoic and Phanerozoic. The Phanerozoic eon is divided into three era which are namely: Paleozoic, Mesozoic and Cenozoic era. Cenozoic era extends from “end-Cretaceous extinction” to the present day. It is dominated by mammals and is also called as the “age of mammals”.
One that has low porosity
One that has high permeability
One that has high porosity
One that has high porosity. Soils with high porosity have more pore spaces that can hold and retain water.
Option D is correct
The type of soil that can retain the greatest amount of water is one that has high porosity. Porosity refers to the amount of empty space or pores within the soil. Soils with high porosity have more pore spaces, which can hold and retain water. This is because the water can fill the pores and is not easily drained or lost.
For example, sandy soils have high porosity as they have larger particles and more space between them. This allows water to infiltrate and be held within the soil. On the other hand, soils with low porosity, such as clay, have fewer pores and tend to retain less water.
In contrast, permeability refers to the ability of water to flow through soil. While high permeability can allow water to quickly pass through the soil, it does not necessarily mean the soil can retain a greater amount of water.
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Answer:
In an aquatic ecosystem, the plants are present both on the subsurface and bottom bed rock of the aquatic body. These are the producers of the ecosystem because they provide food to the living organism in the lake. In day plants growing on the surface of the water takes up carbon dioxide from the atmosphere which is being absorbed in the water, to conduct the process of photosynthesis. These plants release oxygen, which supports the life of aquatic animals. In this way plants limit the abundance of carbon dioxide in water. But in night plants undergo a process of respiration, which releases carbon dioxide. The abundance of carbon dioxide increases in night along with the carbon dioxide being absorbed from the atmosphere. Therefore, concentration of carbon dioxide increases considerably in night as compared to day.