What is the difference between a bony fish and a cartilaginous fish?

Answers

Answer 1
Answer: Bony fish belong to Class Osteichthyes, while cartilaginous fish belong to Class Chondrichthyes. Bony fish have a bony skeleton, while cartilaginous fish have one composed mostly of cartilage. Bony fish have body coverings of scales, while cartilaginous fish are covered with dendritical projections (think shark skin).
Bony fish are found in fresh and salt water; cartilaginous fish are found only in salt water. Bony fish have gills covered by an operculum; cartilaginous fish have gill slits. Bony have no eyelids; the cartilaginous fish do. Bony fish have an air-filled swim bladder; cartilaginous fish have an oil-filled liver to keep them bouyant. Hope this helps! Whew!

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Which of the following statements is true? (1 point)During active transport, a material may be moved from an area of low concentration to an area of high concentration. During passive transport, energy is used to move material against a concentration gradient. During active transport, water is pumped across a membrane to equalize the concentration of salts on both sides. During passive transport, osmosis allows salts to move from one side of the membrane to the other to equalize concentrations on both sides.

Which of the following chemical reactions proves the fact that the products of photosynthesis are reactants of respiration?Photosynthesis:
Respiration:



Photosynthesis:
Respiration:



Photosynthesis:
Respiration:

Answers

The answer is:
Photosynthesis: 6 CO
₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂
Respiration: C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + ATP

Cellular respiration and photosynthesis are complement reactions to each other. These are reverse reactions. In cellular respiration glucose (
C₆H₁₂O₆) and oxygen (O₂) yield carbon dioxide (CO₂) and water (H₂O) and energy is released in the form of ATP. In the opposite reaction - in photosynthesis, carbon dioxide (CO₂) and water (H₂O) yield glucose (C₆H₁₂O₆) and oxygen (O₂)

photosynthesis: C6H12O6 = 6 O2 + 6 CO2 + 6 H2O

breathing: C6H12O6 + 6 O2 6 CO2 6 H2O ATP

Cellular respiration and photosynthesis are complement reactions to each other. These are reverse reactions. In cellular respiration glucose (C₆H₁₂O₆) and oxygen (O₂) yield carbon dioxide (CO₂) and water (H₂O) and energy is released in the form of ATP. In the opposite reaction - in photosynthesis, carbon dioxide (CO₂) and water (H₂O) yield glucose (C₆H₁₂O₆) and oxygen (O₂).

Learn more about photosynthesis by using this link:

brainly.com/question/26494694

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Algae are considered plant-like protists because they

Answers

It is because they produce oxygen by the process of photosynthesis

DDT was widely used as a pesticide for 20 years. Its use was banned after studies showed severe side effects were evident in humans, the environment, and animals as a result of DDT. Why were the side effects of DDT so harmful?A. DDT kills insects and other pests.
B. DDT decomposes.
C. DDT was genetically engineered.
D. DDT bioaccumulates.

Answers

Out of the choices given, the side effects of DDT were so harmful because of the DDT bioaccumulates. The correct answer is D.

Answer: D. DDT bioaccumulates

Bioaccumulation is the accumulation of substances or compounds such as pesticides, fertilizers or other chemicals in the body of the organisms. These substances or compounds are toxic and remain undigested in the body of the organisms are transferred subsequently in a food chain, when one organism is consumed by another organism. The highest trophic level is most effected because of the concentration of the toxic substance is the maximum.

DDT (dichlorodiphenyltrichloroethane) is a colorless, odorless and tasteless crystalline chemical compound. It is used as a pesticide to kill pests in agricultural field. DDT is highly toxic chemical compound. It remains undigested in the body of the organism and transferred in a food chain when one organism is consumed by another organism. The effect of DDT is magnified several times in the top most trophic level in the food chain due to bioaccumulation.

In Guided Lab A you found the shortest distance from the center of the Mt. Vesuvius crater to the coast, in kilometers and miles. What is the distance in kilometers?

Answers

Answer:

7 km

Explanation:

In Guided Lab A you found the shortest distance from the center of the Mt. Vesuvius crater to the coast, in kilometers and miles, the distance in kilometers will be 7 while the distance in miles will be 4.

The crown of a tooth is below the gum.


TrueFalse

Answers

The answer to that question is False

Answer:

false

Explanation:

What organelle can be compared to a security guard who decides whom may enter a building and whom may not?

Answers

The correct answer is the cell membrane. It is responsible in controlling the exchange of material in and out of the cell. Hope this answer helps. Good luck!

Answer:

The correct answer would be plasma membrane or cell membrane.

Plasma membrane is phospholipid bilayer structure which separates the intra-cellular components from extra-cellular environment.

One of the most important characteristics of the plasma membrane is that it is selectively permeable in nature.

It allows some substances to move freely in and out of the cell while restricts the movement of other substances. It is similar to function of security guard who decides whom may enter and whom may not.

Small molecules and uncharged particles can travel across the plasma membrane easily by simple diffusion. For example, exchange or diffusion of gases (carbon dioxide and oxygen) across the cell. The movement of such substance depends upon its concentration gradient across the membrane.

Charged particles and large sized substances require protein channels to travel across the cell. Such substances are transported either with the help of facilitated diffusion or active transport.