The changing appearance of the Moon during the lunar cycle is a result of changes in -the amount of light the Moon emits.
the shadows Earth casts on the Moon.
the amount of sunlight that hits the Moon’s surface.
relative positions of Earth, the Moon and the Sun.

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

Pixels are often referred to using dpi, or dots per inch. true\false

Exit what always affects measurement error in an experiment? a. investigator bias b. variability in nature c. instrument precision d. misreading the instrument