The main purpose of this passage is to--
open-shut case
by rene ebersole
explain the necessary steps in conducting biological
research.
introduce a pioneer in the field of neuroscience
research
encourage continued support for environmental
research.
d
illustrate the importance of investigative research.
soares, a graduate student studying biology at the university of maryland, had
wondered about the strange nodules found on the jaws of alligators. she decided to
attigators after a close encounter with one in a louisiana marsh.
daphine soares had originally set out to discem the difference between the way birds,
has bam owls, and alligators perceive sound. but she couldn't but indulge herself
the mystery of the bumps on an alligator's jaw. soares never imagined that before she
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What’s the difference between extract and abstract as nouns and verbs?

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

“heartwork each day is born with a sunrise and ends in a sunset, the same way we open our eyes to see the light, and close them to hear the dark. you have no control over how your story begins or ends. but by now, you should know that all things have an ending. every spark returns to darkness. every sound returns to silence. and every flower returns to sleep with the earth. the journey of the sun and moon is predictable. but yours, is your ultimate art.” ― suzy kassem what does this quote mean to you? and why? i'm not looking for anything in particular, i just wanted to know. : )