AP BIOLOGY

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution. Your textbook mentions how clay in Earth’s surface could have provided a place for chemical reactions to happen (making bonds to create something new). According to this theory, which of the following events would need to occur first for life to evolve?
A
Beginnings of photosynthesis
B
Beginnings of genetic material
C
Synthesis of organic molecules
D
Formation of the plasma membrane
Explanation: 

Detailed explanation-1: -One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution.

Detailed explanation-2: -Life is coeternal with matter and has no beginning; life arrived on Earth at the time of Earth’s origin or shortly thereafter. Life arose on the early Earth by a series of progressive chemical reactions. Such reactions may have been likely or may have required one or more highly improbable chemical events.

Detailed explanation-3: -The clay hypothesis suggests how biologically inert matter helped the evolution of early life forms: clay minerals form naturally from silicates in solution. Clay crystals, as other crystals, preserve their external formal arrangement as they grow, snap, and grow further.

Detailed explanation-4: -The modern theory of chemical evolution is based on the assumption that on a primitive earth a mixture of simple chemicals assembled into more complex molecular systems, from which, eventually came the first functioning cell(s).

There is 1 question to complete.