Whether lungs evolved once or on over several occasions. Introduction: Lungs are air-filled, spongy organs of respiration located on either side of the thorax. They consist of tubular branches called bronchi, which divide into smaller and narrower branches called bronchioles. The bronchioles further branch into a cluster of microscopic air sacs, called alveoli. Lungs helped animals to adapt to the terrestrial environment.

Question

Want to see the full answer?

Answer 1

Question

Chapter 46, Problem 15TYK

Summary Introduction

To review:

Whether lungs evolved once or on over several occasions.

Introduction:

Lungs are air-filled, spongy organs of respiration located on either side of the thorax. They consist of tubular branches called bronchi, which divide into smaller and narrower branches called bronchioles. The bronchioles further branch into a cluster of microscopic air sacs, called alveoli. Lungs helped animals to adapt to the terrestrial environment.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Figure attached, you don't need any of the textbook words to figure out the answer so don't worry about the font size. A student in a course on intelligent design theory claims that the graph in part (a) shows that losing the ability to respire actually is adaptive for yeast cells living in small populations. Please read the incomplete sentence that appears immediately below, assess as possible completions the lowercase-Roman-numeral-labelled statements that follow, and click each uppercase-letter-labelled response that is presented below and completes accurately the sentence. An astute student in an evolution course would respond that i. the graph in part (a) shows that selection among mitochondria within yeast cells can lead to fixation for traits that decrease mean fitness for that yeast population. ii. the student in the course on intelligent design is wrong; the yeast cells in the small population group retained completely the ability to respire, as they otherwise would have…

Lungs ventilated with water occur in some animals—most notably sea cucumbers—but are rare. Why would water lungs be unlikely to be favored by natural selection? Give as many reasons as possible.

Approximately how long ago did homo sapen (humans) first appear on Earth 2,000 years ago 5-7 million years ago 65 million years ago 150,000 - 200,000 years ago Hominins developed their unique larger brains before acquiring the ability to move on two feet. True False the production of atmospheric oxygen in Earth's environment started with photosynthesis by prokaryotes photosynthesis by multicellular eukaryotes photosynthesis by single celled algae photosynthesis by land plants Homologous structures among animal provide evidence for evolution in that theses structure are all produced by the same gene different in different animals, but are modifications of the same basic structure similar in function, but of different basic structure all different structures within the same species