What holds the two strands of the DNA double helix together? A. Weak hydrogen bonds
B. Strong hydrogen bonds
C. Weak covalent bonds
D. Strong covalent bond

When creating a graph, the goes on the x axis and the goes on the y axis. a. dependent variable, independent variable b. experimental group, control group c. independent variable, dependent variable d. control group, experimental group

Which experiment would most likely contain experimental bias

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation