Multiple Choice
The endosymbiotic theory explains the origins of which of the following cellular structures?
25
views
5. Cell Components
Endosymbiotic Theory
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
The evolution of eukaryotic cells most likely involved which of the following processes?
A
The direct mutation of prokaryotic DNA to form complex organelles
B
The engulfment of prokaryotic cells by an ancestral host cell, leading to organelles such as mitochondria and chloroplasts
C
The fusion of multiple eukaryotic cells to form a single, larger cell
D
The spontaneous generation of organelles from inorganic molecules
Verified step by step guidance1
Understand the context of the question: The evolution of eukaryotic cells is a key topic in biology, and it is closely tied to the endosymbiotic theory, which explains the origin of organelles like mitochondria and chloroplasts.
Recall the endosymbiotic theory: This theory suggests that eukaryotic cells evolved when ancestral prokaryotic cells were engulfed by a host cell. These engulfed cells eventually became organelles, such as mitochondria and chloroplasts, through a symbiotic relationship.
Eliminate incorrect options: The direct mutation of prokaryotic DNA to form complex organelles is not supported by evidence. Similarly, the fusion of multiple eukaryotic cells or the spontaneous generation of organelles from inorganic molecules are not scientifically valid explanations.
Focus on the correct process: The engulfment of prokaryotic cells by an ancestral host cell is supported by evidence such as the double membranes of mitochondria and chloroplasts, their own circular DNA, and their ability to replicate independently within eukaryotic cells.
Conclude with the correct answer: Based on the evidence and the endosymbiotic theory, the most likely process involved in the evolution of eukaryotic cells is the engulfment of prokaryotic cells by an ancestral host cell, leading to the formation of organelles like mitochondria and chloroplasts.
Related Videos
Related Practice
Endosymbiotic Theory practice set
Problem sets built by lead tutorsExpert video explanations