Question

Поясни чому влітку гідра розмножується брунькування, а восени — статевим способом

Answer 1

В умовах, до яких гідри більш пристосовані безстатеве розмноження дає можливість швидко збільшити чисельність виду, причому особинами, для яких дані умови також сприятливі. З іншого боку, вони швидко ростуть, живляться тією ж їжею, що і батьки, і здатні відразу ж скласти їм конкуренцію. Витримати цю конкуренцію можна тільки при сприятливих умовах.Ответ:

Объяснение:

Тому що гідри більш пристосовані до літньої пори року. І після розмноження нова особина буде швидше розвиватися та рости.

Answer 2

Reproduction of Hydra in Summer and Autumn

Hydra is a small, freshwater organism that belongs to the phylum Cnidaria. It has a unique ability to reproduce both asexually and sexually, depending on the environmental conditions. In the summer, Hydra primarily reproduces through a process called budding, while in the autumn, it reproduces sexually.

Budding in Summer: During the summer months, when the environmental conditions are favorable, Hydra reproduces asexually through a process called budding. Budding is a form of asexual reproduction in which a new individual, known as a bud, develops as an outgrowth from the parent organism. The bud grows and eventually detaches from the parent, becoming an independent organism. This process allows Hydra to rapidly increase its population under favorable conditions.

Sexual Reproduction in Autumn: In the autumn, as the environmental conditions change, Hydra switches to sexual reproduction. Sexual reproduction involves the fusion of male and female reproductive cells, resulting in the formation of offspring with genetic variation. Hydra is a hermaphroditic organism, meaning it possesses both male and female reproductive organs. Each individual Hydra can produce both eggs and sperm.

During sexual reproduction, Hydra releases sperm and eggs into the surrounding water. The sperm and eggs are then fertilized externally, leading to the formation of zygotes. These zygotes develop into dormant structures called cysts, which can withstand harsh environmental conditions such as winter. The cysts remain dormant until the conditions become favorable again, at which point they hatch and give rise to new Hydra individuals.

In summary, Hydra reproduces through budding in the summer when conditions are favorable, allowing for rapid population growth. In the autumn, it switches to sexual reproduction, releasing sperm and eggs into the water for external fertilization and the formation of cysts that can survive harsh conditions until the next favorable season.