1 How to know the age of a whale 2 Whether a sponge is an animal or a plant

1.When a whale is born, it is not like humans who remember what year it was born, so how do you calculate its age? Fortunately, a way to calculate the age of seals – counting the growth layers within teeth – can be applied to toothed whales as well and has proven to be extremely valuable.

Although the details of the calculations vary from type to type, the general principles are the same. The growth layer, which can be seen in the longitudinal section of the tooth, is ring-shaped and about the same as the number of rings. But this approach has its drawbacks; There are only one or two whales, and we know the true rate of odontic deposition, so we can't calculate the chronological age correctly.

However, there is not much difference between the species, so it is still widely adopted and is very useful.

Baleen whales, on the other hand, have no teeth, so they need to be used in a different way. Baleen whales have special keratinized "plugs" in their ear canals, and their longitudinal sections also have lamellar lines. The exfoliated ** cells are layered with ear wax to form a layered ring arrangement of one deep (white wax) and one shallow (cuticle).

However, there is also controversy over the uncertainty of the sedimentation velocity.

2. It is an animal.

1.We know the age of the whale by its baleen.

2.Sponges are animals.

3.We eat the root of the turnip.

Not a single point, ask three questions.

There is no exact age, only approximate age, pigeons generally look at the feathers and eye sand on their wings, the color of their nose, toes and beak, and the degree of age. Ungulate are judged by the degree of wear and tear of their teeth, but they are all approximate ages, and it is difficult to judge the exact value. The exact value depends on the animal's birth file and number or pedigree.

The folk custom is to look at the teeth and the claws.

Sponges belong to the phylum Porous Animals and are the most primitive and lowest multicellular animals.

Morphological characteristics of sponges:

Sponges are the simplest multicellular animals in the world. There is no head, no tail, no trunk, no limbs, no nerves and no organs. The main components of sponge cells are calcium carbonate or silicon carbonate and a large amount of collagen.

The shape of the sponge group varies greatly, and the monomer is generally cone-shaped, disc-shaped, goblet-shaped, spherical, etc. The size varies from a few millimeters to 2 meters. Most have calcium, siliceous, or bones.

There are three types of bones of sponge animals: bone needles (sponge needles), sponge filaments (bone filaments), and non-bone needle-type minerals.

Sponge: Sponge is the most primitive multicellular animal, which has lived in the ocean 600 million years ago and has developed to more than 10,000 species, accounting for 1 15 of marine animal species, and is a huge "family". With the exception of about 20 species of the genus Spongilla, which are freshwater, they are all distributed in the intertidal zone of the ocean to a depth of 8,500 meters (more than 28,000 feet), and live sedentically.

Is a sponge the right answer for an animal or a plant.

The sponge is actually one of the most primitive and lowest multicellular marine animals.

Their sensory and nerve cells are not formed, and they are extremely slow to respond to the outside world.

Without a microscope, it is difficult to see the movement of a sponge with the naked eye, which is one of the reasons why people tend to mistake a sponge for a plant.

Sponges are usually brown, black, or grayish-yellow lumps with holes in the water inlet where many tiny flagellar cells grow.

These flagellar cells wiggle constantly, sucking seawater into the body and excreting it from the body, while the tiny organisms in the seawater are left behind to become food for the sponge.

Oh, class la-la-la!

Looking at the scales, you can calculate the age of the fish according to the number of rings. The older ones with more rings and the younger ones with fewer rings. 2. Whales and elephants, as long as their teeth are identified under a microscope, the age can be known.

3. The age of a crocodile is determined by the number of pebbles in its belly. 4. The age of ginseng is determined by its size and shape. 5. Trees look at the annual rings, and how many laps there are is how old they are.

6. The age of the shell depends on the growth line of the shell. My Impression: Animals:

There is a pattern to the age of animals in nature. Plants: The age of plants in nature is regular.

Inspired associations: Animals: As humans continue to slaughter animals, animals continue to decline.

Their age is getting shorter and shorter, so we need to take good care of the animals. Plants: The answer to the question of the age of plants in nature can be found in their physical characteristics.

Research Methods: Animals: Carefully observe the surrounding animals, collect information on their physical characteristics, and find out the patterns.

Plants: Carefully observe the surrounding greenery, collect information about their physical characteristics, and find patterns.

The age of a perennial herb can be inferred from the number of branches in its underground parts, the size of its stems or roots, and the length and thickness of its roots. For example, the age of ginseng is determined by the size and shape of the root. Trees look at the growth rings How many rings are how old Shellfish look at the growth lines on the shells Animals with long horns such as cattle and sheep look at the thickness of the horns Horses look at the teeth Sometimes, the age of animals can be identified according to their various characteristics.

For example, a male deer grows a small tumorous horn at the age of 2, a large horn at the age of 3, two forks at the age of 4, three forks at the age of 5, and four forks at the age of 6, and no longer forks at the age of 7 The scales, vertebrae, operculum, pectoral fins, dorsal fin spines, otoliths and other parts of the fish are speculated to be aged.

The first one was a dog's poop.

Animals look at teeth and special stripes on the body, hair, etc. Plants: All I know is that trees depend on their rings.

Plants are looked at by their growth rings and growth patterns.

Animals are looking at their teeth and bones to see their age.

Porifera, a collective name for approximately 5,000 species of primitive multicellular aquatic animals, is the lower organic marine animals (e.g., members of the genus Emulus and Spongifera) that make up the phylum Sponge Porifera. Sponges have no mouth, no digestive cavity, and no central nervous system, and are currently considered to be the most primitive and lowest-grade aquatic multicellular animals. Sponges that live in seawater are mostly grayish-yellow, brown or black lumps.

It has a number of bulges on the surface of its body, with many small holes next to the bulges and a large hole at the top of the bulge. Seawater flows in from the small pores and out of the large pores, and the tiny organisms enter the sponge with the current, and become the food of the "self-trapping". Therefore, although the sponge is called "the flower and fruit of the sea", it looks like a plant, but it is actually an animal.

Not a plant or an animal.

Tai Sui, also known as "meat Ganoderma lucidum", grows underground but is a rare aggregate composed of three types of bacteria: slime molds, bacteria and fungi, and the existence, effect and efficacy of "Tai Sui" have always been controversial in the biological world.