What is the structure of a DNA molecule called?

double helix

double stranded

double braid

How does the arctic tundra follow the law of conservation of mass and the law of conservation of energy

Which subatomic particle contains the energy stored in chemical bonds? proton isotope neutron electron

Explain how human activities can cause an imbalance in biogeochemical cycling and lead

Which of the following describes the role that enzymes play in the process of metabolism? A: Enzymes carry the genetic instructions required for a cell to initiate metabolism.

Which of the following do a frog, worm, and pine tree have in common? A. They are all eukaryotic organisms that have nuclei in their cells. B They are all prokaryotic organisms that have free DNA in their cells.

Name the three energy roles that organisms fill in an ecosystem.

Adrenergic postganglionic neurons release the hormones norepinephrine and epinephrine. Adrenergic postganglionic neurons release the hormones norepinephrine and epinephrine. True False

Which of the following are examples of the first specialized tissues?

Which structure of the trachea prevents it from collapsing inward and obstructing the air passageway?

What is a Divergent boundary and where is located?