Answer:
Vaccines have been around since 1796 preventing people from diseases and decreasing death rates. I believe due to the modern vaccines and medicine people have been living longer than life expectancies in the 1700's and 1800’s, which was between 30 and 40 years. Vaccines train the human body to recognize viruses or bacteria and the antigens (molecule capable of inducing an immune response) will start attacking the virus or bacteria before it tries to spread and cause sickness once it is has recognized it. However, vaccines are not always 100% safe because they can come with side effects. For example, the Hepatitis B vaccine had a severe allergic reaction, called anaphylaxis which caused difficulty breathing, dizziness, and skin rashes for a few people.
Answer:
no but there is an app to scan receipts
Explanation:
its called fetch rewards and you can get free gift cards from you guessed it scanning receipts and earning points from the receipts
Answer:
D.) Oxygen-poor
Explanation:
The pulmonary veins are the vessels that carry the oxygen-rich blood to the left atrium
Here are some reason to prepare yourself for an SAT. Firstly, start early. We know that ideally you’ll like all the time in the world to prepare for a test. Secondly, set a goal. Have everything planned out so your organized. Thirdly, get a good night sleep. Getting the right amount of sleep will help you think and keep you energized for when you need to take the test. Some other reasons that involve this question are shoring up your weaknesses. If you already have strengths such as the written portion then it might make sense to to put your energy into a weakness. Eat well and prioritize. Therefore, being prepared for a test like this in advance will help you in many ways.
Answer: Shivering helps raise body temperature.
Explanation: Shivering - nerve impulses are sent by the hypothalamus to the skeletal muscles to bring about rapid contractions that generate heat. Shivering therefore helps raise the body temperature. Increase in metabolic rate - the liver produces extra heat in order to raise the temperature of the body
