1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
VashaNatasha [74]
2 years ago
15

Where should the origin of the swim bladder be placed on the phylogenetic tree?

Biology
1 answer:
dolphi86 [110]2 years ago
6 0

Answer:

At the base of Actinopterygii

*This is a unique characteristic of this group.

Explanation:

A peculiar characteristic organ observed in ray-finned fish (as well as in Sarcopterygii, or lobe-finned fish) but not in cartilaginous fish like shark is the swim bladder.

This organ is often described to be a sac containing gas. It helps these set of fish adjust its buoyancy and its position in the water by regulating the concentration of gas present in it.

The swim bladder is formed as a pouch coming off the embryonic digestive tract, and in chondrosteans and holosteans, with a set of teleosts e.g. the eels, it maintains an open pathway to the esophagus. In majority of the bony fish, the swim bladder is totally sealed off, as gas levels in their swim bladder are regulated by producing gas into the bladder via a network of capillaries, the rete mirabile (Latin word for "marvelous net").

The swim bladder is homologous to the lungs of tetrapods. Since they are formed in the same vein. Few fishes that have an open swim bladder employs it as a breathing organ.

You might be interested in
I need help with this fast please!
Mamont248 [21]

Answer:

its neutrons

Explanation:

7 0
3 years ago
Read 2 more answers
What are the two body systems that are always controlling the body?
Usimov [2.4K]

Answer:

The nervous system and circulatory system

Explanation:

4 0
3 years ago
DATA
olya-2409 [2.1K]

Answer:

b. DNA replication occurs only during the G1 phase of the cell cycle.

Explanation:

7 0
2 years ago
EMERGENCY PLS HELP: explain how the kindergarten in the video was designed differently from other kindergartens and/or at school
Ganezh [65]

Answer:

Live as if you were to die tomorrow. ...

“That which does not kill us makes us stronger.” ...

“Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.” ...

“We must not allow other people's limited perceptions to define us.”

7 0
2 years ago
Which descriptions apply to Mendel's pea plant experiments? Select three options.
Rina8888 [55]

Answer:

Used cross breeding to purposely breed plants. Studied a variety of pea plant traits. studied several generations of pea plants.

Explanation:

3 0
3 years ago
Other questions:
  • Which organisms are both secondary and tertiary consumers in this food web?
    8·1 answer
  • Death rates for diarrheal disease are ___ times greater in adults over 74 years old
    11·1 answer
  • The upper limit of the zone of saturation is called the _____
    9·1 answer
  • Who/what use cactus as an energy source?
    15·1 answer
  • When are spindle fibers present?
    8·1 answer
  • How would you determine the volume of a dead cat
    11·2 answers
  • Which of these statements is true about adaptive evolution?
    15·1 answer
  • A polysaccharide that is formed in the liver and muscle cells of the body in order to store glucose is known as: WILL GIVE BRAIN
    13·2 answers
  • Why should we conserve wild animals?<br><br>Hurry up ​
    12·2 answers
  • The space that an organism in an ecosystem lives in is called a
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!