The earliest cells were prokaryotes (heterotrophs taking in organic molecules from their environment), and eukaryotes eventually formed from these cells. From there, jellyfish, algae, and other marine invertebrates were formed, and from then on other animals and plants evolved to the species we have now by the processes of Natural Selection (traits that are favorable to the environment that an organism is in are passed on to the offspring), and speciation (the process of forming species). ... Only if all the parts of a cell were created at the same time would it function properly. ...

• Word Count: 862
• Approx Pages: 3
• Grade Level: High School

The aerobic prokaryote was enclosed by the bacterium's cell surface membrane in the process of endocytosis, which is made easy by the absence of a cell wall in the bacterium. The aerobic prokaryote wasn't digested but continued to function inside the other cell. The host cell received energy that the aerobic prokaryote released. ... Darwin observed that wild animals and plants showed variations just as domesticated animals and plants did. ... Plant stems grow tall in search of sunlight, plant roots grow deep into the soil in search of water and nutrients. ...

• Word Count: 2685
• Approx Pages: 11
• Grade Level: High School

I)Darwin's Dilemma A)Darwin set sail on December 27, 1831 for a cruise around the world 1)He was well educated and had a strong interest in natural history 2)He also had keen powers of observation and an analytical mind 3)Each place he went he collected animal and plant specimens to his collection (a)He examined his specimens and filled notebooks with his observations B)Throughout the voyage he witnessed countless wonders of nature 1)He demanded explanations for these wonders II)The Diversity of Life A)When Darwin visited tropical South America he saw countless species 1)In one ...

• Word Count: 1698
• Approx Pages: 7
• Grade Level: High School