Free Structural Organisation In Animals (Daily Quiz: 6) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Answer: (a)

The development of cockroach is paurometabolous meaning that their development is through nymphal stage. The nymphs look very much like adults. The nymph grows by moulting about 13 times to reach adult form. The last nymphal stage has wingpads while adult cockroaches have wings.

Answer: (c)

Loose connective tissue (which includes areolar tissue, reticular tissue, and adipose tissue) holds organs in place and attaches epithelial tissue to other underlying tissues. It also surrounds the blood vessels and nerves. Cells called fibroblasts are widely dispersed in this tissue. Dense regular tissue includes tendons and ligaments. Tendon connects skeletal muscle with a bone. Ligaments attach one bone to another. Dense irregular tissue includes skin. Specialized connective tissue includes cartilage, bones and blood. Cartilage is a rubbery tissue made by cells called chondroblasts. It does not have any blood vessels within it so healing is not easy if it is damaged and may not occur at all if the damage is extensive enough. Bone is a rigid organ that constitutes part of the vertebral skeleton. It support and protect the various organs of the body, produce red and white blood cells, store minerals and also enable mobility. Blood delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away.

Answer: (a)

Pheretima posthuma is beneficial in agriculture. Its habit of burrowing and swallowing earth makes it porous and increases soil fertility in many ways. Their burrows permit penetration of air and moisture in porous soil and their excretory wastes and other secretions also enrich soil by adding nitrogenous matter to the soil. Pheretima posthuma is not used as a fish meal. Whereas a small white earthworm (Enchytraeus albidus) is often grown in soil and used to feed aquarium fish.

Answer: (c)

Tendons, which attach skeletal muscles to bones and ligaments which attach one bone to another are examples of dense regular connective tissues in which collagen fibres are present in rows between many parallel bundles of fibres.