Which statement below is false? The weakness of hydrogen bonds between the bases of DNA allows base pairs to separate during both DNA
replication and protein synthesis.
Today, scientists use 2-D, 3-D, and virtual models to represent the structure of DNA.
Nucleotides are connected by covalently bonded sugar and phosphate molecules.
O Studies of the amounts of each DNA base in different organisms led to the concept of complementary base-
paring
Experiments conducted were able to demonstrate that'RNA was the genetic material that passed on
information to the next generation.
O Modern advances have added to our understanding of the structure of DNA and its function.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.