Which of these is true of the sabin but not the salk polio vaccine?
requires four injections
currently administered in the united states
mimics the normal route of infection
is an inactivated vaccine

Which of the following is an example of competition that could be found in a forest? question 14 options: deer eat berries and their droppings seed new areas creating more berry bushes two fox populations utilize the same rabbit population as their main food source two hawk populations utilize the same scorpion population as their main food source lack of sunlight due to changes in the seasons restricts the growth of certain plants

Ascientific idea becomes valid when it is what?

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?