What type of bond is a peptide bond?

a. Covalent
b. Hydrogen
c. Van der waals
d. Ionic

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

The bacteria inside a tube worm would be analogous to what organism in the ocean ecosystem near the waters surface? a. photosynthetic algae b. shrimp c. clown fish d. parasitic lamprey

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?