Scientists are creating vaccinations that prevent people from getting bird flu. If the virus mutates, a new vaccine needs to be made. The vaccine needs to be tested, which can be dangerous. It also takes a long time for scientists to know whether the vaccine works.
Answer: Choice C
Explanation: The maximum weight you can lift in a single rep. The most weight you can lift.
Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. The pulmonary vein empties oxygen-rich blood, from the lungs into the left atrium.
Explanation:
hope this helps...
and if u didn't get it its veins...
What? message me the full question lol
Answer:
pertaining to or characteristic of a man or men: masculine attire. having qualities traditionally ascribed to men, as strength and boldness.
Explanation:
