Hydrophilic means that it likes water so it will easily break down in water
hydrophobic will do the opposite and repel water
the point at which warm air begin to raise before colliding with cold air is 3
The greenhouse effect is Earth's greenhouse gasses trapping the sun's heat. <em>It helps keep the temperature in the atmosphere stable for life. </em>
Arthropods were the first animals to successfully invade land from the sea
Because an antibody is "made" relative to the antigen, but kept at low levels when you are exposed the first time ("primary immune response"). The second time you're exposed to the same antigen, memory cells recognize it and the body produces a high level of antibodies, and the level of antibodies usually remains higher for a longer time ("secondary immune response"). This is your basic immune response (primary and secondary).
This explains exactly why vaccines are effective to extremely effective.
