Answer:
People can be immunised against a pathogen through vaccination. Different vaccines are needed for different pathogens. For example, the MMR vaccine is used to protect children against measles, mumps and rubella (German measles).
Answer:
A) Reaction X used a catalyst
Explanation:
Reaction X has a lower activation energy and the most likely cause of this would be a catalyst.
The part of the human ear that conducts air between the middle ear and the back of the throat to equalize pressure on either side of the eardrum is called the eustachian tube.
Eustachian tube connects the middle ear with the nasal cavity. It allows pressure release of the middle ear, preventing trauma that caused by high pressure differences called barotrauma. Eustachian tube is normally closed to prevent bacteria inside nasal cavity enter the ear. It only opened in a certain condition like swallowing.
I think the answer is comparing DNA.
<span>Phase of a writing strategy which involves deciding on the topic and the purpose of the essay is A. prewriting. During prewriting, which is similar to brainstorming, you just want to decide what you want to write about. Here, you may write as many ideas as you can, take some notes, and later on choose which ones you will incorporate in your text, and which ones you will discard. </span>
