Colony refers to a group of individual animals that live together and function as a unit. This term is commonly used to describe social insects like ants, bees, and termites, where each individual has a specific role within the colony. They work together to build and maintain their nests, gather food, and protect the colony.

The correct answer is "an immature form of an animal." A larva is a developmental stage in the life cycle of many animals, including insects, amphibians, and some fish. It is characterized by its distinct morphology and physiology, which are different from the adult form. Larvae undergo metamorphosis to transform into their adult form. This answer accurately describes the definition of a larva as an immature stage in the life cycle of an animal.

Sponges are indeed filter feeders, meaning they obtain their food by filtering water and extracting nutrients from it. They have specialized cells called choanocytes that create water currents and capture small particles, including bacteria and organic matter, for consumption. Additionally, sponges do absorb oxygen from the water through their cells, as they lack specialized respiratory organs. Therefore, the statement "Sponges are filter feeders and absorb oxygen in dissolved water" is true.

Cnidarians are organisms that take in food through a cavity and have stinging cells. Cnidarians include jellyfish, sea anemones, and coral. They have a central body cavity called a gastrovascular cavity, which serves both as a digestive chamber and a means of distributing nutrients throughout the body. Cnidarians also possess specialized cells called cnidocytes, which contain stinging structures called nematocysts. These stinging cells are used for defense and capturing prey. Therefore, the correct answer is organisms that take in food through a cavity and have stinging cells.

The correct answer is "Vase shaped body plan......bowl shaped body plan." This means that the poly definition refers to a vase-shaped body plan, while the medusa definition refers to a bowl-shaped body plan.

The statement is true. The life cycle of sponges involves both sexual and asexual reproduction. The eggs hatch into larvae, which then develop into adult sponges.

The given sentence describes the structure of sponges as having no symmetry, an opening at two ends, a hollow nag, collar cells, neutral cells, jelly-like cells, and tiny pores that cover the surface. However, this description is incorrect. The correct structure of sponges includes asymmetry, an opening at one end, a central cavity, collar cells, and tiny pores called ostia that cover the surface. Therefore, there are three errors in the given sentence.

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The given answer states that sponge adaptations include spike cells for structure and protection. This means that sponges have developed specialized cells with spiky structures that serve the purpose of providing support and protection to the sponge. These spike cells help maintain the shape and structure of the sponge, as well as deter predators from feeding on them. By having spike cells, sponges are able to thrive in their aquatic environments and survive various challenges they may face.

Cnidarians get food by using their stinging cells to sting prey. The tentacles pull prey until a thread-like structure explodes out, which may release venom.