Diversity in Living Organisms

 Red algae are highly nutritious and are also used in many food products, so it cannot be poisonous.

Coelom is an internal body cavity between body wall and digestive tract of many animals in which well-developed organs are present. Platyhelminthes do not have coelom in which well-developed organs can be accommodated. Therefore, they are categorised as acoelomate (an organism with no cavity or coelom between its digestive tract and outer body wall). 

Elephantiasis is a disease of lymphatic system (a network of vessels that transport fluid, fat, proteins and white blood cells to the bloodstream as lymph and remove micro organisms from tissues). A large enlargement of the infected area characterizes this disease. The hardened skin of the infected area resembles the hide (skin) of an elephant. That is the reason why this disease is known as elephantiasis. The disease is caused by the blockage of the lymphatic system by thread-like filarial worms, usually Wuchereria bancrofti (a nematode). The parts of the body most frequently affected are the limbs. The disease is treated with the antifilarial drug or with surgery. 

Aves (Birds) - These are warm-blooded animals and each has four-chambered heart. Crocodiles- Crocodiles belong to class- Reptilia. While most of the members of class Reptilia have three-chambered heart and each crocodile has four-chambered heart. Presence of hairs: Hairs are absent in both birds and crocodiles. Birds bear an outer covering of feathers and body of crocodile (reptilia) is covered with scales. Hairs are present in mammals. Presence of oil glands: These are absent in birds and reptiles. The skin of mammals has sweat as well as oil glands. Presence of beak: Beak is a feeding apparatus of a bird and is absent in a crocodile.

Coelom is a true internal body cavity between body wall and gut of many animals in which well developed organs can be accommodated. Based on the coelom, animals are divided into following types: Acoelomate: An organism with no cavity or coelom between its digestive tract and outer wall. For example, flatworms and jelly fish. Pseudocoelomate: (Pseudo - false, coelom - body cavity). Nematode is an example of pseudocoelomate. The nematode body is simple and cylindrical rather than flattened. There are tissues, but no real organs, although a type of body cavity is present, which is known as pseudocoelom. For example, Ascaris (roundworm), Wuchereria. Coelomate: Animals with true body cavity. For example, annelida, mollusca, arthropoda, chordata, echinodermata.  Haemocoleomate: 'Haem' means 'iron' (present in blood) and 'coelom' means cavity. When the coelomic cavity is filled by blood, it is known as haemocoelom. For example, arthropoda. In arthropod, there is an open circulatory system and so the blood does not flow in well-defined blood vessels (capillary through which blood flows). 

Eukaryotes have a well organised nucleus.

Lopho literally means hill top, trichous means hair like outgrowth.

It is a bacteria; the bacteria are prokaryotes and thus, lack membrane bound organelles.

These are acellular structures.

This is the kingdom of the photosynthetic organisms.

Bacteria are prokaryotes, they lack well defined nucleus and mitochondria for respiration.

Chara destroys the mosquito larvae when added to the aquarium.

Monera includes all prokaryotes which are having nucleoid instead of a nucleus.

This is the correct reason due to which volvox is called colonial.

Felines are examples of predators. Hence, statement 1 confirms the generalization.