DNA is shaped like a twisted ladder. What do we call this shape/structure? pick the the correct answer. 1.Single Strand,
2. Double Strand,
3.Double Helix,
4. Chromosome,​

How can you approximate the number of calories required to keep you in energy balance?

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent