Acid rain damages the protective waxy coating of leaves and allows acids to diffuse into them, which interrupts the evaporation of water and gas exchange so that the plant can no longer breathe
Answer: C,A,B,D
Explanation:
The solar system consists of the sun, the planets and other bodies orbiting it. The formation of the solar system occured in the following order:
C. Hydrogen and helium formed atoms.
A. Earth was bombarded by new materials after formation.
B. Earth separated into layers based on the weight of materials.
D. Outgassing of volcanoes produced a primitive ocean
Therefore, the correct option is C, A, B, D.
Answer:
That depends on the basic principles of the sun rising every day and generating some degree of heat. When the sun sets, that heat source disappears. That concept is easy to understand because you can see the process.
Explanation:
Answer:
Planting agriculture is a trading farm where cash crops are specifically cultivated for sale on a large scale.
Explanation:
- This has led to infrastructure development, e.g. roads, schools, urban hospitals.
- Many workers are employed which leads to better living standards.
- They increase the government's tax base and thereby increase the income for road development.
- Plant farms offer a market for the products of the out-grower and thus guarantee a constant flow of revenue.
- Plantation farms encourage research that leads to better and better crops.
The correct answer is - carving terraced farmlands.
The Incas revolutionized the agriculture in South America by starting to use the carved terraces for production. With this technique, the Incas managed to maximize the arable land area, and to perform farming on places where naturally will be impossible. This method is widely used nowadays, and since the amount of arable land is reducing in the lowlands, it is of great benefit for food production in places that are not suitable for building.
