If an index fossil whose absolute age is used as a reference for other fossils, it was determined only by radioactive dating or another absolute method.
Answer:
b
Explanation:
carbon, hydrogen and oxygen
<span>The limiting factor that keeps the birds from arriving too early in the taiga is the climate surrounding including the temperature and also the precipitation. The following limiting factors are natural occurrences and may have an effect or impact on their own health and lifestyle.</span>
The land is believed to be inhabited by the algae on the first. The earliest land plants were the ones which did not have deep roots. They were the non-vascular plants and included mosses, hornworts, and liverworts. i.e., the bryophytes. They reproduced through spores.
Asking a question is the first part of the scientific process (followed by research, hypothesis, experiment, data/analysis and conclusion). A question that can be answered using the scientific process must have some answers, must be able to be tested or tried through an experiment and must lead to a supposition or proposed explanation that is verified.
