Question

Проанализируйте классы членистоногих в чем их сходство и отличия. Помогите пожалуйста ​

Answer 1

Ответ:

Объяснение:

Членистоногие - пауки и раки.

1 У обоих классов тело разделено на головогрудь и брюшко

2 У обоих классов наружный хитиновый скелет

3 отсутствуют крылья

4 кровеносная система незамкнутая

Различия:

1 Ракообразные в основном водные , паукообразные - наземные животные

2. У ракообразных 2 сложных глаза, у паукообразных  8 простых глаз

3  У ракообразных брюшко сегментировано, у паукообразных нет

4.  У ракообразных 2 пары усиков, у пауков усиков нет

5.  У ракообразных 5 пар ходильных ног, у пауков 4 пары

6. Органы дыхания у  ракообразных жабры, у паукообразных легочные мешки или трахеи

7. органы выделения у раков - пара зеленых желез, у пауков мальпигиевы сосуды и коксальные железы

Answer 2

Classes of Arthropods: Similarities and Differences

Arthropods are a diverse group of invertebrate animals that include insects, spiders, crustaceans, and other related organisms. They are characterized by their jointed limbs and segmented bodies. Let's analyze the classes of arthropods and explore their similarities and differences.

1. Insects (Class Insecta): - Insects are the largest class of arthropods, with over a million known species. - They have three main body segments: head, thorax, and abdomen. - Insects have six legs and usually one or two pairs of wings. - They undergo metamorphosis, transitioning through distinct stages such as egg, larva, pupa, and adult. - Examples of insects include beetles, butterflies, ants, and flies.

2. Arachnids (Class Arachnida): - Arachnids include spiders, scorpions, ticks, and mites. - They have two main body segments: cephalothorax and abdomen. - Arachnids have eight legs and lack wings and antennae. - Most arachnids have specialized appendages called chelicerae, which are used for feeding and defense. - Unlike insects, arachnids do not undergo metamorphosis.

3. Crustaceans (Class Crustacea): - Crustaceans include crabs, lobsters, shrimps, and barnacles. - They have two pairs of antennae and two or three body segments: head, thorax, and abdomen. - Crustaceans typically have multiple pairs of legs, with the number varying among species. - Many crustaceans live in aquatic environments, although some, like woodlice, can be found on land. - They undergo various forms of development, including direct development and metamorphosis.

4. Myriapods (Classes Diplopoda and Chilopoda): - Myriapods include millipedes (Class Diplopoda) and centipedes (Class Chilopoda). - They have elongated bodies with numerous segments. - Millipedes have two pairs of legs per body segment and are generally herbivorous. - Centipedes have one pair of legs per body segment and are typically carnivorous. - Both myriapods have antennae and mandibles for feeding.

5. Other Classes: - There are several other classes of arthropods, including the Class Merostomata (horseshoe crabs) and the Class Pycnogonida (sea spiders). - These classes have unique characteristics and occupy specific ecological niches.

In summary, arthropods are a diverse group of invertebrates with jointed limbs and segmented bodies. The major classes of arthropods include insects, arachnids, crustaceans, and myriapods. While they share some similarities, such as jointed limbs and segmented bodies, each class has distinct characteristics, such as the presence or absence of wings, the number of legs, and the type of development they undergo.