"Ovule" Quotes from Famous Books
 ... after germination the seed is attached to the young plant, and may be removed apparently as sound as when planted, to the astonishment of the unlearned, who are not aware of the great disproportion in size between the ovule and albumen, the former of which is alone necessary to form the plant. The plant may be kept in nursery with advantage for nearly two years. Should they grow rapidly, and the interspaces become too small for them, every second plant had better be removed ...
— The Commercial Products of the Vegetable Kingdom • P. L. Simmonds
... cases are cited by Mr. Darwin, of plants which are more fertile with the pollen of another species than with their own; and there are others, such as certain 'fuci', whose male element will fertilize the ovule of a plant of distinct species, while the males of the latter species are ineffective with the females of the first. So that, in the last-named instance, a physiologist, who should cross the two species in one way, would decide that they were true species; while ...
— The Origin of Species - From 'The Westminster Review', April 1860 • Thomas H. Huxley
... amusement on the subject, but quite fruitlessly. Do you not think that the conjugation of the Diatomaceae will ultimately throw light on the subject? But the other day I came to the conclusion that some day we shall have cases of young being produced from spermatozoa or pollen without an ovule. Approaching the subject from the side which attracts me most, viz., inheritance, I have lately been inclined to speculate, very crudely and indistinctly, that propagation by true fertilisation will turn out to be a sort of mixture, and not true fusion, of two distinct individuals, or ...
— More Letters of Charles Darwin - Volume I (of II) • Charles Darwin
... a central portion, called the nucleus, which is surrounded by two coats, the inner called the secundine, the outer the primine. When the hairlike tube of the pollen-grain passes through the orifice in the coatings of the ovule, and reaches the nucleus, or embryo sack, it is supposed to emit a spermatic or plantlet germ, which passes through the wall of the embryo sack and enters the germinal vesicle contained in it. The vesicle corresponds ...
— The $100 Prize Essay on the Cultivation of the Potato; and How to Cook the Potato • D. H. Compton and Pierre Blot |
