Class 11 science (biology) all chapter concepts .

(1) Identify the correct sequence of taxonomical categories? (a) Species - Order - Phylum - Kingdom (b) Genus - Species - Order - Kingdom (c) Species - Genus - Order- Phylum SOLUTION (a) and (c) represent correct sequences of taxonomic categories as the correct hierarchical arrangement of taxonomic categories in ascending order is Species → Genus → Family → Order → Class → Phylum → Kingdom In sequence (b), species should have been followed by genus. Therefore, it does not represent the correct sequence.                               Concept 01   DEFINITION Hierarchical of classification groups Carolus von Linnaeus created a hierarchical classification system using seven taxonomic categories. Kingdom - Top most taxonomic category. Phylum - Term used for animals while its synonym division is used for plants. Class - One or more than one order makes a cl...

01   DEFINITION Diagrammatic representation of hormones produced in Human body Diagrammatic representation of the various endocrine hormones produced by the glands and tissues in a human body. 02   DEFINITION Endocrine glands Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.  The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands. 03   DEFINITION Hormones from anterior pituitary gland Hormones from anterior pituitary gland are as follows: Growth hormones: Promote growth of whole body, particularly of the skeleton. Thyroid stimulating hormone: Stimulates thyroid to secrete thyroxine. Adrenocorticotropic hormone: Stimulate adrenal cortex. Gonadotrophic hormone: Regulates the activity of gonads...