For number one: the old and new medicine aways included some type of plant and sometimes they both didn’t work. For number two: the new medicine includes the actual virus in it for example the flu shot has a little bit of the flu in it and back in the old days they didn’t do that. I only know number one and two so sorry but hope this helps and this wasn’t from google
Answer: a) Basophils
Explanation:
MHC Receptors are the Major Histocompatibility Complex (MHC) are a set of proteins that are essential for the recognition of what molecules belong to the organism, and which ones are foreign. There are 3 classes of MHC receptors. It is an essential component of the acquired immune system.
Answer:
B. a diary entry from someone who quit smoking.
Explanation:
a primary source is a direct source from someone who experienced it. The other three options are secondary sources.
Answer:
There is many safety issues when outdoors and learning, there are cars, high winds (sometimes), distractions, holes in the ground, and power lines.
Explanation:
