Vaccines introduce small amounts of dead viruses or harmful cells into the body in order to teach the body how to effectively fight said virus/cell
It is based on shared characteristics
Biological realm..............
The answer u r looking for is- D, Nuclear Envelope. Hope I’ve helped ;)
Answer:
1,000 kcal
Explanation:
As a general rule, every trophic level only gains 10% of the energy from the trophic level.
So, the grass has 100,000 kcal of energy. Assuming the bird eats grass, it only gets 10,000 kcal of energy. Assuming the fox eats the bird, it only gains 1,000 kcal of energy.
