Diversity in Living Organisms

Coelentrates have tissue level of organisation and they do not have coelom.

It is incorrect as they have open circulatory system and therefore, blood does not flow in well-defined blood vessels.

Cats have amazing hearing ability. A cat's ear has 30 muscles that control the outer ear (by comparison, human ears only have six muscles). These muscles rotate 180^o, so the cat can hear in all directions without moving its head.

Renal portal system brings blood from internal organs to their kidneys. It is not present in the mammals.

Dracunculus is among the longest nematodes infecting humans.

Green algae living inside fungi is termed lichen. The relationship is called symbiosis.

This option is correct because the locomotory organ of class Sarcodina is pseudopodia.

The locomotory organs of the given organisms are: Amoeba - Pseudopodia Hydra - Tentacles Paramecium - Cilia

Many marine invertebrates  (like sponges, jelly fish, sea anemones, corals, and ciliates) harbor endosymbiotic spherical algal cells called zooxanthelle within their tissues. The reef building corals satisfy most of their energy requirements using their zooxanthelle.

Paramylon is the main storage product of euglenoids. Paramylon is a carbohydrate similar to starch. The chloroplasts found in Euglena contain chlorophyll, which aids in the synthesis of carbohydrates to be stored as starch granules and paramylon. Paramylon is made in the pyrenoids of Euglena. It is stored in rod-like bodies through out the cytoplasm, called paramylon bodies and are often visible as colourless or white particles in light microscopy.

Chlamydomonas is a single-celled alga about 10 micrometers in diameter that swims with two flagella. Flagella of Chlamydomonas are typical of eukaryotic cilia and flagella in that they are composed of micro tubules arranged in the well-documented 9 + 2 structure. They have two flagella of equal length at the anterior end by which they move rapidly in water.

The cell walls of most red algae include a rigid inner part composed of microfibrils and a mucilaginous matrix. The matrix is composed of sulphated polymer of galactose called agar, funori, porphysan and carrageenan. These four polymers give the red algae a flexible slippery texture. Agar is a component of the cell walls of several species of red algae. Agar is a mixture of two components; linear polysaccharide agarose and a heterogenous mixture of smaller molecules called agaropectin.

Bacteria that are naturally having no cell walls include Mycoplasma and Ureaplasma. Ureaplasma is a type of bacteria in the family of bacteria known as Mycoplasma. These bacteria are incredibly tiny and are unique in that they lack a cell wall. Because the cell wall is the part of the bacteria attacked by a number of antibiotics, some common antibiotics such as those in the beta lactam family are not effective against these bacteria.

Some bacteria also use flagella to move over the tops of solid surfaces in a form of movement called swarming. Swarming motility is operationally defined as a rapid multicellular bacterial surface movement powered by rotating flagella. Swarming motility was first reported by Jorgen Henrichsen and has been mostly studied in genus Serratia, Salmonella, Aeromonas, Bacillus, Yersinia, Pseudomonas, Proteus, Vibrio, and Escherichia.

This is the characteristic of all cnidarians. So, in this respect polyps and medusae are similar.