These organisms are very simpleand they do not require a circulatory system. Since their body wall is very thin, they are surrounded by water. Substnces can easily diffuse in and out of the body. Their simple structure helps them in circulation.
Hydras typically exhibit faster responsiveness compared to sponges due to their ability to move and capture prey with their tentacles. Sponges, on the other hand, have a more limited response as they rely on water flow to filter feed and lack the ability to actively move to capture prey.
sponge. Both hydra and sponges are simple aquatic animals that rely on diffusion for nutrient absorption and lack a circulatory system. Nutrients are taken in through their body walls and transported within the body through simple diffusion rather than a dedicated circulatory system.
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Organisms, such as single-celled yeasts, sponges, and hydra can produce offspring by budding.
The fertilization occurs externally
All animals respire, but some simple animals, such as cnidarians (anemones, jellyfish, and relatives), and sponges don't have blood.
Sponges do not have a nervous system. They are simple aquatic animals that lack organs and have a decentralized network of cells for coordinating their activities.
Examples of organisms that reproduce through budding include yeast, Hydra (a freshwater animal), and certain types of plants like cacti. Budding is a form of asexual reproduction where a new individual develops as an outgrowth from the parent organism.
Hydra or Hydra
Budding
Examples of multicellular organisms that reproduce by budding include yeast, hydras, and some types of sponges. In this form of asexual reproduction, a new organism develops as an outgrowth or bud from the parent organism.
the hydras and sponges do not have a circulatory system.because, the water in which they live brings all the food and oxygen when it enters their bodies. It also carries away all the waste products and carbon dioxide when it moves out.