The formation of intense tornadoes requires the most powerful of all thunderstorms, called that you can see here. these thunderstorms, which account for less than 10% of all thunderstorms, usually form in the united states during the spring, between the rocky and appalachian mountains. a) a vortex b) cyclones c) supercells d) wall clouds

According to the cladogram, which organisms have roundworms as a common ancestor?

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen