Author Question: What is the chicken-and-egg type problem we face when trying to decide which came firstproteins or ... (Read 31 times)

Pea0909berry · **on:** Jul 27, 2018

What is the chicken-and-egg type problem we face when trying to decide which came firstproteins or nucleic acids?

A) proteins and nucleic acids probably looked very different before the origin of life
B) nucleic acids cannot replicate without proteins, and proteins cannot be made without nucleic acids
C) early proteins and nucleic acids were very similar to each other
D) proteins and nucleic acids are always present together at the same time

Question 2

Life in the subsurface ocean of Europa will most likely consist of

A) creatures similar to seals and penguins which enter the ocean through holes in the icy crust
B) plants on the ocean floor
C) simple single-celled organisms
D) fish and other complex aquatic organisms