Answer:
Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen.
Explanation:
Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen. By respiration, O2 is removed from the atmosphere and replaced with CO2. However, these processes are not balanced. Some organic matter is not oxidized. (I'm very sorry if I'm wrong but I believe it's that)
Answer:
Cell membrane as a semi permeable membrane.
Explanation
A semi permeable membrane is the one that would only allow water,ions and certain molecules to pass through it by diffusion while restricting other large molecules from passing through.
Details in the attachment.
Answer: The predator is an organism that lives by feeding on other organisms, while prey is usually the organism that is hunted or killed for food.
A common theme in biology is that energy flows through biological systems while matter IS RECYCLED. Energy and matter are not destroyed in the ecosystem. The energy is transformed and the matter is recycled. In a food web, the food is transferred from one organism to another in different forms. this shows that the same molecules and atoms are recycled as the same molecule is used by one organism and then transferred to the second organism.
I believe it's the mitochondrion.