Question

Стадії розвитку 1.червей 2.Членестоногих 3.Риб 4.Земноводних 5.Плазунів 6.Птахів 7.Ссавців СРОЧНО ПОЖАЛУЙСТА

Answer 1

Ответ:

1Червей :получается, что жизненный цикл трематод — это развитие не одного, а трёх поколений червей. Первое поколение — это яйцо, мирацидий и спороциста, второе — редия, третье — церкария, метацеркария/адолескария и марита.

2Членистоногих: яйцо,

Нимфа (внешне крайне похожа на взрослую особь, но не обладает половой зрелостью),

Имаго (половозрелая особь).

3Рыб:эмбриональный (зародышевый), личиночный, мальковый, ювенильный (юношеский), взрослого организма, старческий.

4Земноводных: яйца или икру, эмбрионы, головастики, лягушки

5Пресмыкающихся:откладывают яйца, из которых появляются на свет маленькие детёныши

6Птиц:зародышевый, предплодный, плодный и период вылупления.

7Млекопитающие:Оплодотворение яйцеклетки сперматозоидом, зачатие и образование зиготы

2 Дробление зиготы

3 Образование морулы

4 Образование бластулы или бластоцисты 4.1 Формирование зародышевых слоёв (зародышевых листков)

5 Образование гаструлы

6 Нейруляция ...

7 Сомитогенез

8 Гистогенез и морфогенез

Answer 2

Stages of Evolution: 1. Worms 2. Arthropods 3. Fish 4. Amphibians 5. Reptiles 6. Birds 7. Mammals

The stages of evolution you mentioned represent different groups of animals that have appeared throughout the history of life on Earth. Here is a brief overview of each stage:

1. Worms: Worms are a diverse group of invertebrates that belong to the phylum Annelida. They are characterized by their elongated bodies and lack of limbs. Worms can be found in various habitats, including freshwater, marine environments, and soil.

2. Arthropods: Arthropods are a large group of invertebrates that include insects, spiders, crustaceans, and other related organisms. They are characterized by their segmented bodies, jointed limbs, and exoskeletons. Arthropods are the most diverse group of animals on Earth and can be found in almost every habitat.

3. Fish: Fish are aquatic vertebrates that are characterized by their gills, fins, and streamlined bodies. They are the earliest vertebrates and have been around for millions of years. Fish can be found in both freshwater and marine environments.

4. Amphibians: Amphibians are a group of vertebrates that include frogs, toads, salamanders, and newts. They are characterized by their ability to live both in water and on land. Amphibians undergo metamorphosis, starting their lives as aquatic larvae and then transforming into terrestrial adults.

5. Reptiles: Reptiles are a group of cold-blooded vertebrates that include snakes, lizards, turtles, and crocodiles. They are characterized by their scaly skin and the ability to lay eggs on land. Reptiles are well-adapted to various environments and can be found on every continent except Antarctica.

6. Birds: Birds are warm-blooded vertebrates that are characterized by their feathers, beaks, and ability to fly. They are descendants of reptiles and are the only group of animals that have feathers. Birds have evolved a wide range of adaptations for different habitats and play important roles in ecosystems.

7. Mammals: Mammals are a group of warm-blooded vertebrates that include humans, dogs, cats, whales, and many other animals. They are characterized by their ability to nurse their young with milk and have hair or fur covering their bodies. Mammals have diverse adaptations and are found in various habitats worldwide.

Please note that this is a simplified overview of the stages of evolution and there is much more complexity and diversity within each group.