A researcher is studying reproduction in Taraxacum officinale, the dandelion. She decides to measure only soil temperature. You think her study is poorly-designed. Why?

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.