Answer: E. reforestation
Explanation:
Reforestation is a process of planting trees in an area so as to conserve the land as future forest. According to the given situation, reforestation is the practice which can be used by the biologists to grow nitrogen fixing plants in an area so as to increase the nutrient concentration of the soil which have been depleted.
He finished his extensive experiments with pea plants before and concluded his 5-part- hypothesis.
Answer:
Receiving the same amount of light intensity and water. Being grown in the same type of soil ensures that the above listed constant variable is maintained to ensure that any changes to rate of plant growth is solely due to changes in pH level.
Explanation:
The variable that u are testing Is change in pH level. Hence, to ensure results are reliable, u need to hold the other variables constant.
Answer:
Explanation:
The scientist, J. J Thomson interpreted the deflection of the rays by electrically charged plates and magnets as evidence of “bodies much smaller than atoms” (electrons) that he calculated as having a very large value for the charge-to-mass ratio. That is, The masses of their bodies (electrons) was much smaller than the atoms but they had a very large charge to mass ratio.
He then proposed the plum pudding model of the atom in 1904 before the discovery of the atomic nucleus in order to include the electron in the atomic model.
The answer is D) the organ system.