Answer:
The correct answer will be- What is the effect of adding nutrients over community of plants in a particular ecosystem?
Explanation:
The scientific method is the sequential steps performed to answer the scientific questions based on the observations on the basis of experiments.
The scientific question is the question which has the real answers and can be verified and supported by the experiments and observations.
In the given question the person observed that the composition and structure of the habitat changed due to the addition of nutrients. So he framed a scientific question " What is the effect of adding nutrients over the community of plants in a particular ecosystem?
Answer:
The answer is 50%
Explanation:
The rest of the answers are unreasonable
Answer:
680
Explanation:
When the P680 special pair of photosystem II absorbs energy, it enters an excited (high-energy) state. Excited P680 is a good electron donor and can transfer its excited electron to the primary electron acceptor, pheophytin.
Most peripheral nerves are nerves outside the brain and the spinal cord, carrying both sensory and motor impulses. The peripheral nervous system is one of the two components of the nervous system, the other part is the central nervous system. Peripheral nerves are classified into motor, sensory and autonomic nerves.
Answer:
One could be in the cell. The cell respires, thus producing carbon dioxide in it. So the concentration builds up in the cell. Diffusion is the net movement of particles from a region of high concentration to a region of low concentration, and the carbon dioxide concentration outside the cell is less, therefore the carbon dioxide molecules moves outs of the cell.
Another scenario is when perfume is sprayed into the air. The perfume particles collides with the air particles (lower or no concentration of perfume). This process goes on and on. This is diffusion since the concentration perfume particles collides with the less concentrated particles of perfume.
