Air circulates in Earth's atmosphere. What is the fundamental cause of air circulation in

Earth's atmosphere?

a. ocean currents

b. energy from the sun

d. earth’s magnetic field

i have to have where i found the answer on, so if you have the hmh sixth grade book it will help.

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

Describe five factors that influence the value of fuel