Explanation:
A wheelchair ramp is an inclined plane installed in addition to or instead of stairs. Ramps permit wheelchair users, as well as people pushing strollers, carts, or other wheeled objects, to more easily access a building, or navigate between areas of different height.
Answer and Explanation:
1. passive natural immunity
2. decrease
3. passive artificial immunity
4. His body contains antibodies from his previous exposure, and his body was able to quickly fight off the infection
5. active natural immunity
6. B cells
7. Neutrophils
D. a zygote forms when a sperm fertilizes an egg cell
Answer:
A gene pool consists of all genes, including all the different alleles that are present in a population.
Explanation:
The diaphragm is the most important muscle when controlling breathing.
The diaphragm contracts when you inhale to increase the space into which your lungs expand.