Answer:
I think the answer for your question is the letter c
External respiration (correct answer) involves the exchange of oxygen and carbon dioxide within the environment.
The exchange of wastes through the skin is just called excretion by sweating.
There is no exchange of nutrients that occur in the lungs but rather absorption of nutrients is the function of the gastrointestinal tract.
The exchange of oxygen and carbon dioxide within the cell is called cellular respiration and involves carrying oxygen from the blood to the cell then the cell uses it as the final electron acceptor in the electron transport chain. The metabolic wastes of the cell, primarily carbon dioxide, goes now to the bloodstream to be exchanged for oxygen in the lungs.
It's c because Atoms contain three sub-atomic particles called protons, neutrons and electrons. The protons and neutrons are found in the nucleus at the centre of the atom.
Answer:
D fleas affect all animals
Explanation:
Unclear question. However, I inferred you are referring to this clear rendering of the question:
Determine the degree of pollution with household waste in your neighborhood or your locality:
1. List the human and administrative (social) causes that led to such a situation.
2. What actions must be taken to solve the given problem?
3. What should be your contribution in solving the problem of environmental pollution?
4. Write an essay on the topic: "My community - the beneficial space for work."
