Abiologist wants to demonstrate how atoms are combined in a dna molecule, a geologist wants to demonstrate how mountains are formed as a result of tectonic plate collisions, and a physicist wants to demonstrate wave motion.

what method would best allow these three different scientists to demonstrate their concepts?
a.
laboratory experiment
b.
collection of specimens
c.
observational field study
d.
model-building

The body is protected against harmful flu viruses by

At which location in earth’s interior does the top density continue to increase as thickness decreases?

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.