Which tool did maurice watkins use when studyng DNA

Explain the meaning of evolution

Two students were testing the amount of fertilizer that would best promote the growth of tomato plants in a garden. Which of the following could be an unavoidable source of experimental error?

What are the names of four polysaccharides and what is required for their formation?

After the DNA is copied (DNA replication), two sister chromatids are held together by a a centromere b a chromosome c a centrosome d a centriole

Specialized receptor cells in the sense organs detect stimuli from the environment. this is called

Suppose a large number of dead fish are found floating in a lake. how would you determine whether they died from cultural eutrophication or from exposure to toxic chemicals?

Which best explains how gravity contributes to the formation of layers in protoplanets? Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials.

1. As an object moves towards another object the sound waves bunch up. True Or False 2. As an object moves toward another object the sound waves have lower frequency. True or False. 3.

Do we classify viruses as living

What caused the evolution of antibiotic-resistant bacteria?