What is the twisted ladder shape of the DNA called? 3-D model
nucleotides
double helix
single strand

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas