30 points why do tornadoes happen more frequently in the summer? they require warm air. they form over large, warm bodies of water. they require dry air. they require dust which is present in the summer.

What is the mrna strand that would be copied from this dna strand

1. the is the thinnest part of the earth. 2. the is the thickest part of the earth. 3. what metals are mentioned in the text?

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?