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Q. How different are pteridophytes from bryophytes regarding substance transport?
Pteridophytes are tracheophyte (vascular) plants that are they have tissues specialized in conduction of nutrients and water. Bryophytes are nonvascular plants and in pteridophytes thus the substance transport is done in bryophytes and through vessels that transport occurs by diffusion.
What are zymogens? Zymogens, or proenzymes, are enzymes secreted in inactive form. Under some conditions a zymogen shifts to the active form of the enzyme. Zymogen secretions i
Define Determinants of Food Security - Food Availability? It depends on the quantum and quality of crops, livestock, fishery and other food sources, as well as commercial impor
Provide a link to the graph, describe the variables, and interpret the meaning of the graph
what are protein? What is the constituential uni. Of protein? Briefly explain the various forms of protein?
Nine-year-old Alek is admitted to the emergency room with a closed fracture of the right femur. Radiography revels that the fracture crosses the distal epiphyseal plate. What conce
Most of them happen on mucous membrane. Allergens enter the body by the process of inhalation or ingestion.
Carbohydrates These form about 1%part of protoplasm, they are comparatively simpler compounds of carbon, hydrogen and oxygen in the ratio 1:2:1 The ratio hydrogen to oxygen is
Stratification On the basis of the variation in air temperature. the atmosphere has been divided vertically into four layers: (figure shown below) thee troposphere, stratospG,
In a numeric pyramid to which trophic level does the base always refer? What about the top level? In a numeric pyramid the base corresponds to the first trophic level, i.e., to
Deficiency of vitamin -A (hypovitaminosis-A) Vitamin A deficiency develops due to insufficient supply of the vitamin or its defective absorption from alimentary tract. The defi
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