The cell is the smallest basic unit of matter.
6. a - transgenic organism is one whose genetic material has been altered by genetic engineering (i.e. man!)
9. a - biomedical research
10. b
13. b
16. d
18. b
<span>Vaccines help develop immunity by imitating an infection. but it does cause the immune system to produce T-lymphocytes and antibodies. Sometimes, after getting a vaccine, the imitation infection can cause minor symptoms, such as fever.</span>
Answer:
True
Explanation:
Ice pellets are rain drops that have frozen <em><u>before</u></em> they hit the ground.
(They freeze while they're still in the air)