Animalia Porifera, Coelenterata, Platyhelminthes Dan Annelida

Spongia sp. is utilized by humans as a body scrub. This is because Spongia sp. has a rough texture that makes it effective in exfoliating and removing dead skin cells from the body. It can help improve blood circulation and leave the skin feeling smooth and rejuvenated. Additionally, using Spongia sp. as a body scrub can also help unclog pores and prevent acne breakouts.

The correct answer is "zigot - morula - blastula - gastrula - tubuh organisme". This is the correct sequence of developmental stages in animal embryogenesis. The zygote is formed by the fusion of sperm and egg, which then undergoes cell division to form a solid ball of cells called the morula. The morula then undergoes further cell division and rearrangement to form a hollow ball of cells called the blastula. The blastula then undergoes gastrulation, where the cells rearrange and differentiate to form the three germ layers (ectoderm, mesoderm, and endoderm) and the body plan of the organism is established.

The correct answer is 1-C, 2-A, 3-B. This means that the correct pairing for the composition of the skeleton is: Calcarea (1) - zat kapur (C), Hexactinellida (2) - zat silikat (A), Demospongia (3) - spongin (B).

The correct answer is "difusi melalui permukaan tubuh" (diffusion through the body surface). Platyhelminthes, also known as flatworms, have a simple body structure with a thin and flat body shape. They lack specialized respiratory organs such as gills or lungs. Instead, they rely on the process of diffusion to exchange gases with their environment. Oxygen from the surrounding water or air diffuses across their thin body surface and enters their cells, while carbon dioxide produced by cellular respiration diffuses out of their body. This method of respiration is efficient for small and flat organisms like Platyhelminthes.

The correct answer is hydra. Hydra is a species in the class Hydrozoa that is known to inhabit freshwater environments.

Porifera, or sponges, do not have a circulatory system. Instead, food is distributed through the body by amoeboid cells. These cells are capable of changing their shape and moving around, allowing them to transport nutrients to different parts of the sponge's body. This method of food distribution is necessary for sponges since they lack specialized organs or systems for digestion and circulation.

Porifera dapat menanggapi rangsang dari luar tubuhnya karena memiliki bagian pinakosit. Pinakosit adalah jenis sel yang terdapat pada tubuh Porifera dan berfungsi sebagai sel pelindung serta berperan dalam proses penangkapan dan pencernaan partikel makanan. Sel-sel pinakosit ini juga berperan dalam merespons rangsang dari luar tubuh, seperti cahaya atau sentuhan. Dengan adanya sel pinakosit, Porifera dapat merespons dan berinteraksi dengan lingkungannya.

The correct answer is "tubuh pipih dorsoventral." This means that the general characteristic of Platyhelminthes is having a flat body that is compressed from top to bottom. This adaptation allows them to live in various habitats, including aquatic environments and as parasites in other organisms. The flat shape also helps them to absorb nutrients efficiently through their body surface.

The correct order of development for Aurelia is zigot (fertilized egg) - planula (larva) - skifistoma (polyp) - strobila (polyp with reproductive structures) - efira (young medusa) - medusa (adult jellyfish). This sequence represents the typical life cycle of Aurelia, starting from the fertilized egg, progressing through different larval and polyp stages, and finally reaching the adult medusa stage.

The correct answer is scyphozoa. Ubur-ubur, or jellyfish, are commonly known to belong to the class Scyphozoa. This class includes various species of jellyfish characterized by their bell-shaped body and stinging tentacles. They are typically found in marine environments and have a complex life cycle involving both a polyp and a medusa stage. The other options, ctenophora, hydrozoa, and anthozoa, refer to different classes of marine organisms but are not specifically associated with jellyfish.

When a leech attaches to human skin and sucks blood, the victim does not feel pain and their blood does not clot because the leech releases an anesthetic substance to numb the area and an anticoagulant to prevent blood from clotting.

Cnidaria weakens its enemies and prey by releasing toxins produced by nematocysts. Nematocysts are specialized cells found in the tentacles of Cnidaria, such as jellyfish and sea anemones. These cells contain venomous barbs that can inject toxins into their targets, immobilizing or killing them. The release of these toxins allows Cnidaria to defend themselves against predators or capture their prey more effectively.

Nefridia adalah alat ekskresi pada cacing tanah. Alat ini berfungsi untuk mengeluarkan limbah dan zat-zat sisa dari tubuh cacing tanah. Nefridia terdiri dari serangkaian saluran yang berhubungan dengan rongga tubuh cacing dan membantu dalam proses pengeluaran limbah. Dengan demikian, nefridia adalah alat ekskresi yang tepat pada cacing tanah.

The protonephridial system in Platyhelminthes functions as a transportation and excretion tool. This system helps in the removal of metabolic wastes from the body and regulates the balance of water and solutes. It consists of a network of tubules and flame cells that filter waste products and excess water from the body cavity and release them outside the organism. Additionally, the protonephridial system also plays a role in maintaining osmotic balance with the environment by regulating the concentration of solutes in the body fluids.

Cnidaria dan Ctenophora digolongkan dalam kelompok Coelenterata karena memiliki rongga tubuh yang berfungsi sebagai usus. This means that both Cnidaria and Ctenophora have a body cavity that functions as a digestive system. This is a characteristic feature of organisms in the Coelenterata group, which is why they are classified together.

The correct answer is clonorchis sinensis. Eating raw freshwater fish can lead to infection with clonorchis sinensis, a type of parasitic worm. This worm can live in the human liver and bile ducts, causing a disease known as clonorchiasis. Therefore, it is important to avoid consuming raw freshwater fish to prevent this type of infection.

Eunice viridis and Lysidice oele are annelids that can be utilized as a high-protein food source.

Cacing tanah pheretima mempertahankan diri dengan cara memutuskan bagian tubuhnya. Ketika cacing ini terancam oleh predator atau terluka, ia dapat dengan cepat memutuskan bagian tubuhnya yang terkena bahaya. Bagian tubuh yang terputus ini akan terus bergerak dan mengalami regenerasi, sehingga cacing dapat melarikan diri dan mempertahankan kelangsungan hidupnya.

The correct answer is "zat kutikula". Parasitic worms have a protective outer covering called cuticle, which helps them avoid being digested by their host. The cuticle provides physical resistance and prevents the worm from being broken down by the host's digestive enzymes. This adaptation allows the worm to survive and continue its parasitic lifestyle.

Annelida memiliki rongga tubuh sejati, sedangkan Platyhelminthes tidak memiliki rongga tubuh sejati. Rongga tubuh sejati adalah rongga di dalam tubuh hewan yang dikelilingi oleh lapisan jaringan epitelium. Rongga ini berfungsi untuk melindungi organ-organ dalam tubuh dan juga sebagai tempat peredaran cairan tubuh. Kehadiran rongga tubuh sejati pada Annelida menunjukkan tingkat kompleksitas yang lebih tinggi dalam taksonomi dibandingkan dengan Platyhelminthes.