AP BIOLOGY

Previous
Next

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
“First form of life came into existence following one spark or on one particular spark day. The other version argues that life came into existence, or rather emerged, following prolonged sparking rather one specific spark. Electric emissions can generate amino acids andsugars from an atmosphere loaded with water, methane, ammonia and hydrogen". This statement belongs to:
A
Deep sea vents
B
Community clay
C
Chilly start
D
Electric spark
Explanation: 

Detailed explanation-1: -At the time it was widely agreed that stromatolites were the oldest known lifeforms on Earth which had left a record of its existence. Therefore, if life originated on Earth, this happened sometime between 4.4 billion years ago, when water vapor first liquefied, and 3.5 billion years ago.

Detailed explanation-2: -The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.

Detailed explanation-3: -Many scientists believe that RNA, or something similar to RNA, was the first molecule on Earth to self-replicate and begin the process of evolution that led to more advanced forms of life, including human beings.

Detailed explanation-4: -Some of the oldest evidence of life on Earth is 3.49-billion-year-old fossilised remains of microbial mat structures, which look like wrinkle marks in rocks, found in the Pilbara region of Western Australia. Also found in the Pilbara region are fossilised remains of stromatolites.

There is 1 question to complete.
Previous
Next