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Double fertilization It carries two sperm cells to the female. A characteristic of angiosperms in which the pollen tube gametophyte in the ovule. The one sperm cell fuses with the egg cell and gives rise to the diploid embryo and the other sperm cell fuses with the two polar cells to form the triploid cell which develops into the endosperm.
What is nucleus where it is found? Nucleus : The nucleus is present only in eukaryotic cells. It is the control center and is generally found in the center of the cell. The
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in what aspect are the cnidarians similar to protozoans? to the poriferans?
Echinodermata - Regeneration in Invertebrates Asteroids (starfishes), ophiuroids (brittle stars) and crinoids (sea lilies) can reproduce their lost arms and although parts of
Molecular Hydrogen N 2 -fixing organisms also produce a membrane bound enzyme called uptake-hydrogenase under N 2 -fixing condition. The physiological significance of the pres
Catecholamines increase activation of Ca 2+ via beta-adrenergic receptors and the adenyl cyclase system. Dopamine has both alpha and beta and dopaminergic effects. Its beta ef
Disorders of Pituitary Function: The disorders of pituitary function result in following conditions. Hypopituitarism : Growth Hormone (GH) Deficiency Hypopituitarism is
Q. Definition of Biological diversity? Biological diversity has no single standard definition. One definition holds that biological diversity is a measure of the relative diver
What is the typical vegetation of the grasslands? The Grasslands are mainly formed of herbaceous (nonwoody) vegetation: grass, small trees and bushes.
what are phylums included in aceolomates?
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