MARINE BIOLOGY
11th Edition
ISBN: 9781259880032
Author: CASTRO
Publisher: RENT MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 8, Problem 1CT
Hagfishes and lampreys are the only living representatives of a very ancient group. Why do you suppose there are still some of these jawless fishes around?
Expert Solution & Answer
Summary Introduction
To explain: The reason why there are still some of hagfishes and lampreys around.
Introduction: Jawless fishes are the most primitive fishes living today. They have cylindrical and elongated body like that of snakes or eels. Hagfishes and lampreys are jawless fishes. Hagfishes live in burrows, whereas lampreys are mostly found in temperate regions.
Explanation of Solution
There are still some of hagfishes and lampreys around due to the following reasons:
- Both hagfishes and lampreys are highly adopted species of the class Agnatha.
- Since both hagfishes and lampreys are living fossils, they are the most successful ones.
Some jawless fishes still survive as highly specialized forms, such as unusual predators and parasites. These specialized structures have not been outcompeted by other advanced fishes.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Threespine sticklebacks that invaded freshwater lakes have lost their pelvic spines. What other adaptations might you expect to see in fish that have moved from a marine environment to a freshwater habitat?
Why do you think baleen whales are generally larger than toothed whales? Why are they capable of growing larger than even the largest dinosaurs?
Which species rests on the tips of two pelvic fins and elaborate tall fin as it sets on the seafloor?swordfish anglerfish tripod fish catfish
Chapter 8 Solutions
MARINE BIOLOGY
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How can we explain that fossils of Mesosaurus an extinct reptile that could not swim across open water, are found in the southern parts of both Africa and South America?arrow_forwardMembers of Chondrichthyes are thought to be descended from fishes that had.arrow_forwardWhich of the following is the correct classification for the following chordate animal: This animal has a skeleton made of bone. Most modern day fish are in this group. They use gills to breathe and have a swim bladder to help control buoyancy. They also have a lateral line to detect vibrations in the water. Question 29 options: a) Superclass Agnatha b) Urodela / Salamanders c) Anura / Frogs d) Marsupial e) Class Osteichthyes f) Reptiles (non avian) g) Monotreme h) Birds i) Cephalochordata j) Eutharia k) Class Chondrichthyesarrow_forward
- Which of the following is the correct classification for this chordate animal: This vertebrate possesses hair and mammary glands. They are endothermic. This group gives birth to live young at a fetal stage. Most then nurture their young in a pouch. Question 31 options: a) Class Chondrichthyes b) Eutharia c) Cephalochordata d) Birds e) Urodela / Salamanders f) Class Osteichthyes g) Monotreme h) Reptiles (non avian) i) Anura / Frogs j) Superclass Agnatha k) Marsupialarrow_forwardWhy do you think manatees evolved to be so much slower than other marinemammals?arrow_forwardLobe finned fishes are considered to be an evolutionarily important group because; (bubble both that apply) Group of answer choices 1) They have bones and musculature in their fins 2) They have a little bit of lung tissue 3) They lay an amniotic egg 4) They are tetrapodsarrow_forward
- Within the subphylum Urochordata is a group called the appendicularians (or larvaceans; class Appendicularia). This relatively obscure group of organisms plays an important role in the global carbon cycle and other biogeochemical processes in the ocean. Use library and Internet resources to research the natural history of these unique invertebrate chordates. What do they eat? How do they capture food?arrow_forwardWhich structure of the ray-finned fishes allows for breathing in water while the fish is stationary? swim bladder operculum lateral line mucus glandsarrow_forwardWhich of the following is the correct classification for this chordate animal: This vertebrate starts its life cycle in the water in a form without legs. the adult form is a tetrapod and lives mostly on land. These animals do not have a tail and they are specialized for movement like jumping to capture prey. Question 26 options: a) Birds b) Cephalochordata c) Monotreme d) Class Chondrichthyes e) Urodela / Salamanders f) Anura / Frogs g) Eutharia h) Reptiles (non avian) i) Marsupial j) Superclass Agnatha k) Class Osteichthyesarrow_forward
- Which of the following taxa of fish shared most direct common ancestry with the group of animals that evolved into the terrestrial tetrapods? -Subclass Elasmobranchii -Class Neopterygii -Subclass Sarcopterygii -Class Actinopterygii -Class Chondrichthyesarrow_forwardby comparing and contrasting the physical features of a shark, guitar fish and the sting ray, what can you deduce about the evolutionary relationships among the elasmobranchs?arrow_forwardIn activity you watched the "inner fish" which centered around the fossil tiktaalik who was a close relative of ichthyostega. If you were to run DNA on Ichthyostega or Tiktaalik you would find that they are most closely related to; The Sarcoptyrygii (lobe finned fishes) The Actinopterygii (Ray finned fishes) The chondrichtyes (catilagenous fishes) The cetaceans (whales and dolphins)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license