Spermatozoïde: Gamète mâle composé d'une tête et d'un flagelle. Voir plus
Spermatozoïde - Dictionnaire Visuel - Copyright © 2005-2016 - Tous droits réservés.
Segmentation d'un oeuf fécondé: Cellule résultant de la fécondation. En se divisant, l'oeuf devient un nouvel être. Voir plus
Segmentation d'un oeuf fécondé - Dictionnaire Visuel - Copyri ...
Grossesse: Nidation d'un oeuf fécondé dans l'utérus. Voir plus
Grossesse - Dictionnaire Visuel - Copyright © 2005-2016 - Tous droits réservés.
Plant cell: the cell is a highly complex system that is the site of intense energy exchange and which presents vast interphase surfaces. Like all living organisms, it feeds itself, grows, multiplies a ...
Tree: large ligneous plant whose stem is bare lose to the ground and carries branches at its top. See more
Tree - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
Plant: living being with cellulose walls, and often chlorophyll and starch; it has neither a mouth nor a nervous system; its mobility and sensitivity are weaker than those of animals. See more
Plant - ...
Branch with alternate buds: small branch. See more
Branch with alternate buds - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
Branch with opposite buds: small branch. See more
Branch with opposite buds - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
Graminae: plant with a cylindrical stem and inconspicuous flower spikes. See more
Graminae - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
Cross section of a tree trunk and stump: trunk: part of the tree, between the roots and the branches, consisting of wood on the interior and bark on the exterior. Stump: the remainder of the turnk inc ...