Question

question 25 2 pts the molecular clock is based on the assumption that living organisms have equal amounts of carbon and carbon - 14 in their tissues. genetic mutations accumulate at a constant rate. the products of uranium decay tend to solidify, separate out of water, and mix with salts that collect on the bottom of a lake or sea. heating an irradiated substance releases trapped electrons together with a quantity of light directly in proportion to their number.

Explanation:

The molecular clock concept in evolutionary biology assumes that genetic mutations accumulate at a relatively constant rate over time. This allows scientists to estimate the time of divergence between species by comparing genetic sequences.

• The first option about carbon and carbon - 14 is related to carbon - dating, not the molecular clock.
• The third option is about uranium decay products which is a geological dating method (not related to molecular clock).
• The fourth option is about a property of irradiated substances (thermoluminescence dating concept, not molecular clock).

Answer:

genetic mutations accumulate at a constant rate.