All of these are necessary
B. The tick is a vector. Vectors are like vehicles that carry genetic material. The tick is carrying the genetic material of lyme disease to the animal.
Answer:
In the element (<u>n Na20)</u> the <em>2 </em>means that there are 2 oxygen atoms in the Sodium Oxide.
B <span>What is the effect of crop selection for pest resistance on the distribution of leaf size in a population of plants?
</span>
Answer:
water would not form hydrogen bonds between H20 molecules
