Soal-soal Filum Coelenterata/Cnidaria

The correct answer is gastrovaskuler. Gastrovaskuler refers to the central cavity found in the middle of the body of Hydra. This cavity functions in both digestion and circulation of nutrients. The term "gastrovaskuler" combines "gastro" which means stomach or digestive system, and "vaskuler" which means blood vessels or circulation. Therefore, it accurately describes the role and location of the central cavity in Hydra.

Cnidaria reproduces through both sexual and asexual methods. In sexual reproduction, the fusion of sperm and egg cells occurs, resulting in the production of a zygote. The zygote then develops into a larval stage called a planula. Eventually, the planula undergoes metamorphosis and transforms into either a polyp or a medusa. The medusa stage is the correct answer because it represents the mature, free-swimming form of cnidaria.

The correct answer is "Nematokis." Nematocysts are specialized stinging cells found in coelenterates, such as jellyfish and corals. These cells are used to immobilize or paralyze their prey by injecting venom.

Aurelia aurita is a type of jellyfish, and the larva of this jellyfish is called a planula.

Anthozoa is the correct answer because it is a class of Coelenterata that does not have knidoblasts on its tentacles. Knidoblasts are specialized cells found in other classes of Coelenterata, such as Hydrozoa and Scyphozoa, that are used for defense and capturing prey. Protozoa is not a class of Coelenterata, and stenofora is not a recognized term in the context of this question. Therefore, anthozoa is the only option that fits the given criteria.

The correct answer is "zigot – planula – skifistoma – strobila – efira – medusa – zigot". This is the correct sequence of the life cycle stages of Aurelia aurita. It starts with the formation of a zygote, which develops into a planula larva. The planula then transforms into a scyphistoma, which undergoes strobilation to form a series of ephyrae. The ephyrae then develop into medusa, which eventually produces new zygotes to complete the life cycle.

Coelenterata, seperti karang dan ubur-ubur, memiliki peran penting dalam melindungi pantai dari erosi. Mereka membentuk terumbu karang yang berfungsi sebagai benteng alami yang menyerap energi gelombang laut, sehingga mengurangi dampak erosi pantai. Terumbu karang juga menyediakan habitat bagi berbagai spesies laut, yang berkontribusi pada keanekaragaman hayati ekosistem pantai. Oleh karena itu, melindungi pantai dari erosi adalah salah satu manfaat utama coelenterata dalam ekosistem.

Coelenterata is a phylum that includes organisms like jellyfish and sea anemones. These organisms have a body form called polyp, which is a cylindrical shape with tentacles surrounding a central mouth. The polyp form is characterized by being sessile and attached to a substrate, such as rocks or coral reefs. This body form allows them to capture prey and filter feed efficiently. Therefore, the correct answer for this question is "polip."

The reproductive phase in the Coelenterata group is carried out by structure number 2.

Coelenterata melumpuhkan mangsa atau musuhnya dengan sel penyengat yang terdapat pada ektoderm. Ektoderm adalah lapisan luar pada tubuh Coelenterata yang mengandung sel penyengat khusus yang disebut nematosist. Sel-sel ini mengandung kapsul beracun yang dapat ditembakkan ke mangsa atau musuhnya untuk melumpuhkannya. Dengan demikian, ektoderm merupakan tempat sel penyengat yang digunakan oleh Coelenterata untuk melumpuhkan mangsa atau musuhnya.