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
Vadim26 [7]
3 years ago
8

A key derived character of sharks and rays that distinguishes them from ray-finned fishes is

Biology
1 answer:
o-na [289]3 years ago
3 0

Answer:

Jaws and a swimming bladder

Explanation:

A defining characteristic between sharks and rays that distinguish them from ray-finned fish is the *possession of jaws in sharks* and rays;and the *possession of swimming bladder in ray-finned fishes*.

Characteristics of sharks and rays are as follows :

They are cartiiliginous fishes; they possess *strong jaws* lined with teeth; body dorsoventrally flattened, fusiform (spindle shaped) with heterocercal tail(diphycercal in Chimaeras); paired fins; *no swimming bladder or lungs*; pelvic fins in males often modified to form clappers; Gill arches internal to gills; reduced notchord; lateral-line system; paired nostrils; internal nares absent; separate sexes; internal fertilization and direct development; oviparous, oviparous, or ovoviviparous. Examples include, Spiny dog fish or dog shark, Ray Raja, Chimaera.

Characteristics of ray-finned fishses:

They generally lack paired fins; no internal nares; *air sacks usually function as swimming bladder*; skeleton usually well ossified. Blind olfactory sacs (do not open into the mouth); Tail homocercal. Examples include Tilapia, Claris,and Polypterus.

You might be interested in
Which of the radiations has the shortest wavelength
faltersainse [42]
Gamma-Rays have the shortest wavelength.
6 0
3 years ago
Read 2 more answers
why are electron carriers needed for transporting electrons from one part of the chloroplast to another?
svp [43]
High energy electrons are highly reactive (Their energy can be used to make NADPH & ATP.)
5 0
3 years ago
Read 2 more answers
A client has been admitted to the emergency department. the client's family tells the nurse that the client has suddenly become
Phoenix [80]
The correct answer is delirium.
The Confusion Assessment Method (CAM) is a psychiatric tool used to assess and identify delirium in patients. According to the first observations and the patient's responses to CAM, the nurse can conclude that the patient exhibits signs of delirium. This is because he is unable to concentrate and organize his thinking, he is inattentive, he is lethargic and all these behaviours are sudden and acute. These symptoms cannot be associated with dementia, as dementia develops gradually and doesn't affect attention and consciousness. Also, the symptoms don't point to depression since depressive patients are focused and attentive. Finally, the nurse cannot conclude that the patient is dehydrated because further tests need to be conducted to assess hydration. 
6 0
3 years ago
what probability do we have of obtaining a purple flower (Rr), when we combine two blue flowers (rr) in an incomplete Dominance
34kurt

Answer: none

Explanation:

If we have that the color characteristic is regulated by the dominant gene R, by crossing two blue flowers with the recessive gene r, no violet flower will be obtained, since the rule of incomplete dominance describes that phenotypes can be obtained intermediates of homozygous parents, however in the case, we only have 2 parents with the same recessive conditions, which do not contribute to generate the violet, to produce one of the parents should have a gene that expresses the color red

6 0
3 years ago
In which type of injection are medications administered directly into the bloodstream?
olya-2409 [2.1K]
Parenteral route

injecting a drug into the body, includes intradermal, SQ, IM, IV routes. Drugs given IV route produce the most rapid actions because they are given directly into the bloodstream.

5 0
3 years ago
Other questions:
  • Who discovered the impermanence of sexual phenotypes?
    15·1 answer
  • Is the clavicle inferior the contralateral?
    5·1 answer
  • About how many kcalories would someone spend just resting for an entire 24 hour period?
    12·1 answer
  • The paired, rod-shaped ____ cartilages are located in the mucous membrane fold that connects the epiglottis to the arytenoid car
    14·1 answer
  • In what part of a mitochondrion does the krebs cycle occur
    6·1 answer
  • Which things in the picture are organisms? Check all that apply.
    8·2 answers
  • Help is needed please!!
    14·1 answer
  • What organ works to keep you blood plasma isotonic, so that your blood cells do not shrivel up or explode?
    9·1 answer
  • How is the circulatory system like a network of highways?
    13·2 answers
  • What options could you give your patient if they did not proceed with genetic testing?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!