CELL, TISSUES 0 GAN 14 ORGAN SYSTEM OF ANIMAL
abida CE L All animals are made up of cells. The cell plays a fundamental role in the understanding of zoology. It also helps in the understanding of chemistry. Cell is…
Anatomy of Root – Types of tissues in root
sana Root has following types of tissues: Side: The vascular tissue and the pericycle form a tube of conducting cells called stele. Xvlems are present in the centre of the root.…
Sex Linkage in Man
rubab Colour Blindness Color blindness, or color vision deficiency, in humans is the inability to differentiate between som or all colors that other people can distinguish. It is most often of…
OBJECTIVES
Multiple Choice Questions MCQs Four options are given at the end of each statement. You should encircle one option from them. The number of electrons present in nature are: (a)…
MODEL SUBJECTIVE QUESTION
What are elements? Give major and trace element. What is atom? Give its structure. Write note on isotopes. What are energy levels or shell? How many shells are present in…
DEFINITIONS AND KEY POINTS
TERMS DEFINITIONS Matter Anything that occupies space and has mass is called Mass The amount of matter in an object is called Mass Element The chemical substances that in ordinary…
Sex Linkage in Drosophila ( Reciprocal cross & Test cross )
Thomas Hunt Morgan (1910) discovered sex linkage in fruit fly Drosophila. It supported the chromosomal theory of heredity. Morgan deveioped cultures of Drosophila flies. He studied different traits like mour…
IPIDS ENERGY, INTERFACES, AND SIGNALS
L•ds are nonpolar organic molecules that are insolubfr- in polar water but s luble in nonpolar organic solvents like ether, alcoh( , and chloroform. P ospholipids and cholesterol are lipids.…
Soil – Components and Organisms
Soil The complex composite mass made up of both inorganic and organic, components containing water and air is called soil. There are different amount of various components of soil. Their…
Sex linked inheritance definition , traits and example
The inheritance of a trait (phenotype) that is determined by a gene located on one of the sex chromosomes is called sex linked inheritance. The expectations of sex-linked inheritance in…