To analyze:
Why the development of the membrane system was an important phase in the origin of life.
Introduction:
The membrane system refers to the membrane bound organelles seen in all eukaryotic cells.
Answer to Problem 1SA
Correct answer:
Option (a): amino acids.
Explanation of Solution
The formation of the first membrane around chemical components lead to the formation of the first cells. This started life on earth. When membrane systems developed around cells, it allowed more complexity to come into life processes.
The different chemical components within cells began to be enclosed within lipid membranes. This created specialized structures called organelles.
The development of the cell membrane allowed the cell to regulate the molecules that could interact with the cell components, allowing access to required chemicals, while inhibiting others that were injurious to the cell and its components.
Specialized functions evolved in the cells, and the cells in turn grew specialized for various functions. This may have been what led to the evolution of multicellular organisms. This development is considered an important phase in the origin of life.
The separation of different chemical components within a cell by membranes lead to the evolution of organelles. This is an important phase in evolution because it led to the increase in complexity of life processes.
Want to see more full solutions like this?
Chapter 12 Solutions
WHAT IS LIFE? LAUNCHPAD 12 MO. SUB.
- Why is RNA likely to have been pivotal in life’s beginnings?arrow_forwardWhich of the following would have been found in an early prokaryotic cell? a membrane-bound organelles b nucleus c chloroplasts d DNAarrow_forwardWhat are the eons in which the following events occur? Origin of Earth. Oxygen appeared in the atmosphere Prokaryotic cells Single cell eukaryotes Multicellular eukaryotes Animals Plantsarrow_forward
- The simple animals such as planaria can be cut into number of pieces and each piece grows into a complex organism. What is this process known as?arrow_forwardWhich molecule is believed to have preceded the other two during the evolution of life? RNA Proteins DNAarrow_forwardWhat types of similarities in cell structure and function tell biologists about the common origin of organisms? Explainarrow_forward
- Why protiens are called the shapers of life?arrow_forwardDo plants and animals have a common multicellular ancestor?arrow_forward1.) Which of the following is not part of the early cell theory? A)All organisms are multicellular. B)All organisms are made of one or more cells. C)The cell is the fundamental unit of life. D)All cells come from preexisting cells. 2) Which of the following features is not common to all cells? A)cell wall B)ribosomes C)RNA and DNA D)cytoplasm 3) Which of the following does not describe an organism in the domain bacteria? A)Has a typical cell size of 10-100 micrometers. B)Is considered a prokaryote. C)Can use a flagella to swim in fluids. D)Contains a nucleod region.arrow_forward
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College