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...lasm is ultimately restricted to a few cells of the [[embryo]], these germ cells then migrate to the [[gonad]]s. ==Germ plasm theory==

...are diploid (containing one set of chromosomes from each parent), but sex cells ([[Spermatozoon|sperm]] and [[Ovum|egg]]) are haploid. In contrast, tetrap ...as haploid since they contain half the genetic information of [[somatic]] cells, but are not monoploid as they still contain three complete sets of chromos

Many hornworts develop internal [[mucilage]]-filled cavities when groups of cells break down. These cavities are invaded by [[photosynthetic]] [[cyanobacter ...e cell inside the spore, and a slender extension of this cell called the ''germ tube'' germinates from the proximal side of the spore. The tip

...ria are found within a single cell and only a small proportion of the host cells are thus invaded, although the mycelium itself is abundant in the intercell ...injury is brought about both by the withdrawal of nutriment from the host cells and by the extensive destruction of the epidermis of the host and the resul

...'[[Arbuscular mycorrhiza]]'' seen under microscope. [[Flax]] root cortical cells containing paired arbuscules.]] ...ure, they usually will germinate quickly, either sending out a sprout-like germ-tube (Fig. 1609, b) which on finding sufficient nourishment grows into myce

...the other hand, are changes that are more profound and effect the germinal cells of the organism in such a way that the changes are inherited. The most typi ...some way environment by its stimulation does occasionally affect the germ-cells and produce changes that are inherited. Plants that have long been cultivat

...h carpel lining the ovarian cavity. There are, therefore, normally as many cells or locules in a compound ovary as there are carpels. Through the partical o ...s (pollen) is located. The so-called cells are not to be confused with the cells of the plant tissue. The gynoecium and androecium, both necessary for the p

...he host to the advantage of the parasite making its home between or in the cells of the host. Both types of disease-production have the same ultimate result ...t on falling within the open blossom they germinate at once, sending their germ-tubes into the tender young kernels. The affected kernels are apparently no

...he host to the advantage of the parasite making its home between or in the cells of the host. Both types of disease-production have the same ultimate result ...t on falling within the open blossom they germinate at once, sending their germ-tubes into the tender young kernels. The affected kernels are apparently no