Viruses – structure
abidaGENERAL STRUCTURE OF VIRUSES Viruses are infectious particles consisting only of the viral genes enclosed in a shell made up of proteins. The infectious complete body of virus is called…
DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF PLANT DIVERSITY
1 TERMS 11- DEFINITIONS 1' Diversity The presence of variety of plants in the form of different taxas (specie, genera) is calleddiversi of • lant. Systematics The study of kinds…
DIVESITY OF PLANTS
The presence of variety of plants in the form of different tans (specie, genera) is called diversity of plant. Different plants have different morphology, physiology, cytology and anatomy. It produces…
OBJECTIVE OF GENE FREQUENCIES
Four options are given at the end of each statement. You should encircle one option from them. Which of the followings should be large for Hardy Weinberg theorem: (a) Gene …
MODEL SUBJECTIVE QUESTION OF GENE FREQUENCIES
Write note on modern synthesis. 2 Discuss Hardy Weinberg theorem. 3 Write note on genetic drift. 4 Write note on gene flow and mutation. 5 Write note on different modes…
DEFINITIONS AND KEY POINTS OF GENE FREQUENCIES
Terms Definitions Evolution The individuals of the same species that occupy a give area at the same time and share a unique set of genes i called population. Allele…
MOLECULAR EVOLUTION
The structure and functions are observable on a large scale. Therefore, many evolutionists study changes in animal structure and function. - Its examples are change in the shape of bill…
RATES OF EVOLUTION
There are two models of evolution based on the rate of evolution. The concept that evolutionary changes occurs gradually over millions of years is called phyletic gradualism. Charles Darwin believes…
SPECIES AND SPECIATION
Definition of biological specie: Taxonomists classify organisms according to their similarities and differences. The fundamental unit of classification is the species. Unfortunately, it is difficult to define species. According to…
Natural Selection Reexamined
The theory of natural selection remains very important in the modern biology. Some phenotypes are more successful. They leave more offspring than the other phenotypes. It is a natural selection.…