Answer:
A.The weak force acts within protons and neutrons, and the electromagnetic force has an infinite range.
Explanation:
Weak force explanis the interaction among subatomic particles (e.g. protons and neutrons) and is directly involved in the radioactive decay of the atoms. This is the reason that it has been well studied to understand nuclear fission reactions. Its range is very limited and does not exceeds beyond subatomic particles.
On the other hand, electromagnetic force is a very strong force that holds atoms together. It has infinite range. Once can assume the strength of this force from the basic understanding that, within an atom, electrons and protons exist together despite of their opposite charges. Nevertheless, the integrity of atom is not disturbed.
Answer:
A) Leaf cell
Explanation:
Plant cells are surrounded by cell walls, made of cellulose
Energy available to krill is 1500 calories
<u>Explanation:</u>
Energy produced by phytoplankton = 15,000 calories
Energy available to krill = ?
Along the food chain, only 10% of energy is transferred to the organism of higher trophic level.
Thus,
energy available to krill = 
= 1500 calories
Energy available to small fish = 
= 150 calories
Energy available to medium fish = 
= 15 calories
Energy available to large fish = 
= 1.5 calories
Passive membrane processes are those that do not require energy and move substances down a concentration gradient; namely, these are diffusion, facilitated diffusion and osmosis.
Explanation:
imagine I teach my child at my home , it doesn't involve any commercial purpose . I don't need any money from my child , so that's free market economy.
