Answer:
B
Explanation:
The allelic combination of the organism is known as its genotype. The genotype is responsible for determining the traits (phenotype) of the organism. However, these traits are not solely determined by the genotype but rather the interaction between the genotype and the environment in which the organism exists.
The answer is C. nitrogen.
Plants are main producers in ecosystems so, primary productivity of ecosystems depends on them. Carbon is necessary for plants, but it is widely present in plants. On the other hand, calcium and sodium are not as essential. However, nitrogen is important for plants because it is necessary to make proteins. Proteins take part in many different processes such as photosynthesis (this is actually primary productivity). But, nitrogen is not available to plants, they cannot absorb it simply from the air but rely on some symbiotic bacteria which are able to.
The 3rd Law because the action of the climber pulling on a rope causes a reaction that makes their body go up/lift up.:)
Answer:
A. By burning coal in a boiler to produce steam. The steam produced, under pressure, flows in a turbine, which spins a generator to create electricity
B. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity
