Arctic terns nest in the Tundra in shallow scraped out depressions on the open ground. The depressions are lined with a small amount of dead plant matter such as grass. What is described?

habitat

competition

niche

grazing

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

How is the motion of the particles of water at 80 ⁰c different from the motion of the particles of water when it is 30 ⁰c?

Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.