When the north end of earth’s axis is tilted toward the sun, north america will experience
a.
more indirect rays and shorter days.
b.
more indirect rays and longer days.
c.
more direct rays and shorter days.
d.
more direct rays and longer days.

Which best describes the structure of dna?

Which of the following would most likely be key to gathering evidence that the rna world hypothesis is valid? creation of suitable environments for long-term study of single-celled organisms simulation of early earth conditions and long-term study of the resulting molecules development of a system for studying the microsphere's ability to absorb additional molecules categorization of the different specific conditions that result in the development of microspheres

Plz ! ive been stuck on this forever