Sharks

Sharks have skeletons made of cartilage, which is less likely to fossilize compared to bone. Additionally, shark bodies are usually scavenged by other marine animals before they can be preserved as fossils.

While longevity data are not available for many sharks, maximum ages do vary by species. Some sharks like the smooth dogfish (Mustelus canis) may only live 16 years, while others such as the porbeagle shark, (Lamna nasus) may live as long as 46 years. Whale sharks (Rhincodon typus) the largest fish in the world may live over 100 years.
Grey Reef shark=25 years Great white shark=30-100+ years Great Hammerhead shark=20-30 years These are 3 sharks and their lifespans. From these, you could say that sharks live from 20-100 years old.

No, sharks do not have teats. Instead, female sharks have a reproductive system that includes internal fertilization with the male inserting claspers into the female's cloaca to transfer sperm for internal fertilization. The fertilized eggs develop inside the female shark before being born as live young or hatched as eggs.

Depends on the species.

Some are filter feeders, they sift krill and plankton out of the sea water and swallow it.

Some eat fish they can swallow whole.

Some go after bigger prey that has to be bitten into pieces Before swallowing.

Answer

they eat with there several rows of teeth, & digest it.

they usually eat anything smaller than them that lives in the water.

first they whack the prey with there tail then nibble on them to see if they want to eat it and if they do then they eat it with there 5 rows of teeth & digest it

There is no species of shark that do not eat living organisms.

Sharks are filter feeders and sieve tiny bits of plankton and small animals from the water through the gills as they swim with wide-open mouths. They do not drink water. The blood and tissues of sharks are salty containing high levels of urea, and other salts. Sharks basically are saltier than the sea. Sharks absorb pure water from the sea by Osmosis (through their gills). It's a process where water flows across a semi permeable membrane from an area of higher concentration of water to an area of lower concentration to equalize concentration levels. Sharks can secrete extra salts through their rectal gland. Most sharks can't live in fresh water with the exception of bull sharks which can lower their salt level to enter into fresh water.

While the mother shark is giving birth she seems to be very calm and leaves the babies alone. It is a process of giving birth, and she ignores the babies. After she is done birthing them, she moves on, and leaves the babies to their own defenses. The mother does not raise the babies at all. If she ever saw them again, she would treat them like any other shark, and if she wanted to attack them, she would.

There are sharks that lay eggs, and they don't stay and defend them either. Basically, the babies are on their own and head for shallow water and protection of plants, reefs, or mangrove roots to survive. It is all instinct. They have also been tagged as babies and found to move their area during bad storms, such as hurricanes. When the storm is over, they come back to their safe areas.

Even in the womb, babies protect themselves by eating the smaller offspring in the womb, so when they are born, they can protect themselves pretty well.

Sharks mistake humans for seals, they do not deliberately target humans and usually spit them out when they note their mistake. But it is rare you would die from them. Because we taste bad to them. But you would lose a lost amount of blood.

While this may be true for shallow water sharks found off the islands of Hawaii and other coastal locations, the behavior of deep and ocean water sharks is far more predatory and unpredictable.

Dried shark fins are fins that have been harvested from sharks, then cleaned, dried, and often traded for culinary purposes. They are a key ingredient in shark fin soup, considered a delicacy in some cultures. Concerns have been raised about the impact of shark finning on shark populations and marine ecosystems.

No, sharks are not omnivores. They are carnivores, meaning they primarily feed on other animals such as fish and marine mammals.

No a Manta is a shark.

Yes, sharks can sense electromagnetic fields using special organs called ampullae of Lorenzini. These organs help sharks detect the electrical signals given off by other animals, such as prey, even in dark or murky waters. By sensing these fields, sharks can locate and track their prey more efficiently.

Some research suggests that a shark's sense of taste may be its weakest, as they primarily rely on other senses like vision, smell, and electrical sensors called ampullae of Lorenzini to locate prey.

Wolf sharks are just phonies. There's no such thing as wolf shark.

Probably the sail fish. It's also the fastest animal in the sea. It can go faster than a cheetah!! Some people say the dogfish is bigger. This actually IS true. But, most people don't realize the dogfish is really a shark.

The male reproductive glands are the testes (singular testis), also known as the testicles.

The immunization for Inactivated Polio contains four doses. The doses are usually given at 2 months, 4 months, 6-18 months, and 4-6 years of age.

In the sex cells of a dogfish shark, there would typically be 12 chromosomes. This is because sex cells, such as sperm and eggs, are haploid, meaning they contain half the number of chromosomes found in somatic cells. Since muscle cells in the dogfish shark contain 24 chromosomes, their sex cells would contain half that number.

Remoras attach themselves to sharks using a suction-like organ on their heads, gaining protection and access to food scraps from the shark's meals. This relationship benefits both species, as the remoras get free meals and the sharks receive a cleaning service in return.

Common features of mucopolysaccharidoses include progressive skeletal abnormalities, joint stiffness, coarse facial features, intellectual disability, organ enlargement, and cardiovascular complications. These are due to the accumulation of glycosaminoglycans in tissues throughout the body. Treatment options typically focus on managing symptoms and providing supportive care.

Smokeless tobacco does not affect the reproductive organs of either male or female. It contains nicotine, a mild stimulant, which has similar effects of caffeine on the cardiovascular system, but other than that it is basically harmless (see tobaccoharmreduction.org for more information on the risks associated with smokeless tobacco). The reason for its benignness compared to smoking is that it does not contain the thousands of chemicals and carcinogens that a lit cigarette does.

Cigarettes are cancerous because of the combustion. The moment a cigarette is lit on fire, thousands of chemicals and carcinogens are created and inhaled into the lungs (a sensitive organ that bypasses many of the body's natural defenses). Smokeless tobacco is absorbed through the tissues of the mouth, and does not contain the thousands of chemicals found in smoke. Many public health sites claim that smokeless tobacco causes cancer, however, this is rarely backed up (look for references to studies for claims like these; there are rarely any at all and those that are referenced are very old or poorly done). If I could point you to one excellent study on the effects of smokeless tobacco and cancer it would be this recent meta-analysis of the majority of good research done thus far, which can be found here: http://www.biomedcentral.com/content/pdf/1741-7015-7-36.pdf

According to the National Cancer Institute, there is a definite cause and effect between use of smokeless tobacco and cancer of the oral cavity. Smokeless tobacco has 28 chemicals that have been found to cause cancer. See the related link for more information.

The Megladon is most likely extinct, but some people say it is still alive.

A person's teeth can affect their facial characteristics by contributing to the overall shape and structure of their face. Crooked or misaligned teeth can cause the jaw to appear unbalanced or out of proportion, while missing teeth can lead to sunken cheeks or changes in the bite alignment that may alter facial symmetry. Conversely, well-aligned and healthy teeth can enhance a person's smile and contribute to a more harmonious facial appearance.

Sharks occupy the top predator niche in an ecosystem, helping to regulate the populations of prey species and maintain ecological balance. They contribute to the overall health of marine ecosystems by controlling the numbers of various species and preventing overpopulation of certain prey species. Additionally, sharks play a crucial role in structuring food chains and maintaining biodiversity in marine environments.