According to Sutton’s observations, how does the number of chromosomes in a grasshopper’s body cells compare to the number in its sex cells. Body cells have twice the number of chromosomes (24) as sex cells (12).

Sponges

Answer has 7 votes. The Tuatara, a lizardlike reptile that lives only in New Zealand, has those three “eyes”. It belongs to a group of reptiles that once included many other creatures, but today, the Tuatara is the only surviving member of that group.

Leech

Flatworms, nematodes, and cnidarians (jellyfish, sea anemones, and corals) do not have a circulatory system and thus do not have blood. Their body cavity has no lining or fluid within it. They obtain nutrients and oxygen directly from the water that they live in.

skinks

Etruscan shrew

Brachiopods

Squids have three hearts; one main heart and two branchial hearts. Octopuses and squid have three hearts. Earthworms have five hearts. Scientists are studying cockroach and hagfish hearts to help design solutions for human heart disease.

National Geographic confirms that these gentle giants are the tallest land mammals in the world. Their necks are 6 feet long on average, which is why they need powerful cardiovascular systems. Unlike octopus or squid — which do have multiple hearts — giraffes only have one heart.

Octopuses have 9 brains because, in addition to the central brain, each of 8 arms has a mini-brain that allows it to act independently. Octopuses have blue blood because they have adapted to cold, low oxygen water by using hemocyanin, a copper rich protein.

To date, there’s only one species that has been called ‘biologically immortal’: the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.

Share All sharing options for: Tardigrades are the toughest animals on Earth. What would it take to kill them all? In the end, there will be tardigrades. If a cataclysm wipes out most of life on the planet — including humans — it’s likely that tardigrades will survive.

They might be ‘kind of immortal’, but the immortal jellyfish are not impervious to all threats. They can be eaten by bigger creatures, or get killed by being sucked into a vent of a nuclear power plant, so they are not un-killable.

Contrary to popular belief, lobsters are not immortal. Lobsters grow by moulting which requires a lot of energy, and the larger the shell the more energy is required. Older lobsters are also known to stop moulting, which means that the shell will eventually become damaged, infected, or fall apart and they die.

Some modern species may possess biological immortality. Certain scientists, futurists, and philosophers have theorized about the immortality of the human body, with some suggesting that human immortality may be achievable in the first few decades of the 21st century.

The world’s largest recorded lobster was a 44-pounder (20-kg) caught off Nova Scotia in 1977, according to the Guinness Book of World Records. Maine lobstermen hauled in a record 100 million pounds (45.4 tonnes) of lobsters last year, due in part to overfishing of predators such as haddock, cod and monkfish.

The phenomenon of negligible senescence in some animals is a traditional argument for attempting to achieve similar negligible senescence in humans by technological means….Maximum life span.