Multiple Choice
Which of the following best describes the scientific explanation for the origin of life on Earth, as opposed to traditional creation stories that describe Earth emerging from a vast expanse of water?
15
views
21. Evolution
Introduction to Evolution and Natural Selection
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In which group of organisms did the vertebrate lung first appear?
A
Reptiles
B
Cartilaginous fishes (Chondrichthyes)
C
Amphibians
D
Bony fishes (Osteichthyes)
Verified step by step guidance1
Understand the evolutionary timeline of vertebrates and the development of respiratory structures. The vertebrate lung is an adaptation for breathing air and is thought to have evolved in aquatic environments where oxygen levels were low.
Recognize that cartilaginous fishes (Chondrichthyes) primarily use gills for respiration and do not possess lungs. Their respiratory system is adapted for extracting oxygen from water.
Note that reptiles and amphibians have lungs, but these groups evolved later in the vertebrate lineage. The lung structure in these organisms is more advanced and adapted for terrestrial environments.
Focus on bony fishes (Osteichthyes), as they are the group where lungs or lung-like structures first appeared. In some bony fishes, these structures evolved into swim bladders, which help with buoyancy rather than respiration.
Conclude that the vertebrate lung first appeared in bony fishes (Osteichthyes), as an adaptation to environments with low oxygen levels, marking an important step in the evolution of air-breathing vertebrates.
4:58mWatch next
Master Evolution and Natural Selection with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Introduction to Evolution and Natural Selection practice set
Problem sets built by lead tutorsExpert video explanations