Question

1.для гидры,медузы характерна......симметрия а)осевая б)лучевая в) зеркальная г) центральная 2. отличная особенность всех кишечнополостных-наличие...клеток а)нервных б)половых в)стрекательных г)кожно-мускульных 3.в благодарных условиях гидры размножаются а)делением надвое б)половые путём в)почкованием г)фрагментацией

Answer 1

1. лучевая 2. Стрекательных 3. Почкованием

Answer 2

1)б
2)г
3)в

Надеюсь, помогла С:

Answer 3

Hydra and Jellyfish Symmetry

Hydra and jellyfish exhibit radial symmetry. This means that their body parts are arranged around a central axis, similar to the spokes of a wheel. Radial symmetry allows these organisms to interact with their environment from any direction.

Unique Feature of Cnidarians

One unique feature of all cnidarians, including hydra and jellyfish, is the presence of cnidocytes. Cnidocytes are specialized cells that contain stinging structures called nematocysts. These cells are used for defense and capturing prey. When triggered, the nematocysts shoot out a barbed thread that injects venom into the target.

Reproduction in Hydra

Under favorable conditions, hydra reproduce through budding. Budding is a form of asexual reproduction where a new individual grows as an outgrowth from the parent organism. The bud eventually detaches and becomes an independent organism.

Reproduction in Jellyfish

Jellyfish reproduce sexually through a process called spawning. During spawning, male jellyfish release sperm into the water, which is then captured by female jellyfish. Fertilization occurs internally, and the female jellyfish releases fertilized eggs into the water. These eggs develop into larvae, which eventually grow into adult jellyfish.

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