Structural Organisation in Plants and Animals
Structural Organization in Animals
Sterocilia occur in
Consider the following statements (i) - (iii), each with one or two blanks
(i) Bones have a hard and non-pliable ground substance rich in 1 and 2 which give bone its strength
(ii) Some of the columnar or cuboidal cells get speciallised for secretion and are called 3 epithelium
(iii) 4 junctions help to stop substances form leaking across a tissue
Which one of the following options, gives the correct fills ups for the respective blanks from (1) to (4) in the statements ?
Match the following and choose the correct answer
A.B.C.D.TouchSmellCranial nervesMedulla oblongata(i)(ii)(iii)(iv)Nasal epitheliumForamen magnumSensory papilaePeripheral nervous system
Assertion : Earthworm are known are known as friends of farmers
Reason : Earthworms make burrows in the soil and make the soil porous, which helps in repiration and penetration of developing plant roots.
Read of following statements regarding different types of animal tissues and select the incorrect ones.
(i) Each fasciculus (or bundle of muscle fibres) is surrounded by an epithelial tissue covering called perimysium
(ii) Multi unit smooth muscles are present in ciliary and iris muscles in the eyes and muscles of the walls of large bloood vessels
(iii) Columnar epithelium present in gastric glands, intestinal glands, intestinal glands and pancreatic lubules, has a secretory role and is called as glandular epithelium
(iv) Epithelial tissue arises only from the ectoderm of embryo and is usually supplied with blood vessels.