4. What type of bond holds the two strands of DNA together?
A. Tonic
B. Covalent
C. Hydrogen

covalent bond holds the two strands

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;