Relative dating uses _________ to estimate how old a fossil is.
A. radioactive isotopes
B. a molecular clock
C. structural features
D. depth within rock layers
E. embryonic structures
Answer: D. depth within rock layers
You might also like to view...
Which structure present in the moss life cycle is diploid?
A. Archegonia B. Spore C. Gametophyte D. Protonema E. Zygote
A nutrient medium that has all of its chemical components identified and their precise concentrations known and reproducible would be termed
A. enriched. B. synthetic. C. reducing. D. enumeration. E. complex.
The grouping or classification of species is termed
A. kingdom. B. taxonomy. C. genus.
Most mycoses are difficult to treat because
A) many fungi have developed resistance antifungal agents. B) fungicides are rapidly metabolized by the liver. C) fungal cells provide few targets for selective toxicity. D) treatment causes major disruption of the microbiota. E) fungicides are extremely expensive.