Theories of acent of SAP in Plants
sana Here are following theories which explain the ascent of sap in plants: a) Root pressure (b) Capillarity (c) Vital theory and (d) Cohesion-tension theory. (a) ROOT PRESSURE The hydrostatic pressure…
DEFINITIONS AND KEY POINTS FOR CLASSIFICATION
sidra Classification The arrangement of plants into groups and sub-groups on the basis of similarities is called classification. The characters which are uses as basis of classification are called criteria of…
Bessey’s Classification system
Charles E. Bessey (1845-1915) proposed a modified system of classification of Bentham and Hooker. He separated the gymnosperms from angiosperms. He reorganized the orders of angiosperms. His system is popularly…
SEX LINKED INHERITANC OBJECTIVES
rubab Multiple Choice Questions (MCQs) I. Sex chromosomes were discovered by: (a) Carl Correns (b) Nilsson Fhle(c) 1.1 1. Morgan (d) Mendel The J shaped chromosome in drosophila is: (a) Autosomes…
RANSLOCATION (ASCENT OF SAP
The upward movement of water in a plant is called-the ascent of sap. A large quantity of water is absorbed by the roots. It must be conducted upwards to the…
SEX LINKED INHERITANC SHORT QUESTIONS
How many chromosomes are present in male and female grasshopper? A ns: The numbers of chromosomes in male are 23. It has I I pairs and one X chromosome. So…
Movement of membrane across plasma membrane
abida greater than it inside. Filtration Hydrostatic pressure forces small molecules across selectively permeable membranes from areas of higher pressure to areas of lower pressure. A frog’s blood pressure forces water…
Factors affecting absorption of water by root
Following factors affect the absorption of water by root: I. Soil Temperature: The rate of water absorption increases with a rise in soil tempera’ tire. lint this rise to a…
SEX LINKED INHERITANC SUBJECTIVE QUESTION
1.What is sex linked inheritance? Discuss its different types. Discuss sex linkage in drosophila. Discuss genetics of colour blindness in man. Discuss different pattern of sex determination. Describe ZZ-ZW system…
SEX LINKED INHERITANC DEFINITIONS AND KEY POINTS FOR OBJECTIVES
TERMS DEFINITIONS Sex linkage The genes present on the sex chromosomes are called sex linked gene and this phenomenon is know. as sex linkage. Reciprocal cross A cross in %vhich…