As you travel from the surface of the earth up through the atmosphere into outer space, the gases become. a) more dense. b) less dense. c)higher in temperature. d)consistently lower in temperature.

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..

Nucleic acids offer variability because they contain alternate forms of genes called .

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine