Question

Хто немає хітиновий покрив​

Answer 1

Ответ:

Хітиновий покрив мають павукоподібні

*ОбъЯснение*:

Павукоподі́бні, або арахніди (Arachnida) — клас членистоногих, який включає павуків, кліщів, скорпіонів, косариків, сольпуг та деякі дрібніші групи. Вони відрізняються від інших членистоногих поділом тіла на дві тагми: головогруди і черевце. Зазвичай представники класу мають 8 ходильних кінцівок, педипальпи і хеліцери.

Клас: Павукоподібні (Arachnida); Cuvier, 1812

Наукова назва: Arachnida

Царство: Тварини (Animalia)

Підтип: Хеліцерові (Chelicerata)

допоміг???

Answer 2

Organisms Without Chitinous Covering

Chitin is a tough, protective polysaccharide that is the main component of the exoskeletons of arthropods such as insects, spiders, and crustaceans. However, there are several organisms that do not have a chitinous covering:

1. Vertebrates: Vertebrates, including mammals, birds, reptiles, amphibians, and fish, do not have chitinous coverings. Instead, they have different types of skin coverings, such as scales, feathers, fur, or skin.

2. Mollusks: Mollusks, such as snails, clams, and octopuses, do not have chitinous coverings. They have a variety of shell types, including calcium carbonate shells, but they lack chitin-based exoskeletons.

3. Echinoderms: Echinoderms, like starfish and sea urchins, also do not have chitinous coverings. They have a unique endoskeleton made of ossicles, which are small, calcareous structures embedded in their skin.

4. Flatworms and Roundworms: These types of worms do not possess chitinous coverings. They have soft, flexible bodies without an exoskeleton.

5. Protozoa: Single-celled organisms like protozoa do not have chitinous coverings. They lack a rigid external structure and rely on other mechanisms for protection.

6. Sponges: Sponges are simple aquatic animals that lack chitinous coverings. They have a porous body structure supported by a skeleton of spicules, which are made of calcium carbonate or silica.

These examples illustrate the diversity of organisms that do not possess chitinous coverings, relying instead on a variety of other structural adaptations for protection and support.