Question

define viviparous plant and oviparous plant?

Answer 1

Viviparous plants produce seeds that germinate before they get detach from the parent plant . This phenomenon is commonly observed in mangroves(for example - Rhizophora species). The seedling germinates and grows under its own energy while still attached to its parent. Then it drops into the water to transport away.

Germination of Ginkgo biloba seeds with intact and removed sarcotesta was compared to test the role of the seed coat in germination biology. The presence of an intact sarcotesta significantly reduced total germination percentage when compared to seeds with the sarcotesta removed. Some seeds were also cold stratified. This treatment was not necessary for germination, but it did improve total germination percentage. The seeds were collected during the period of natural abscission. Contrary to the accepted literature, we found that Ginkgo seeds contain well-developed embryos at the time of dispersal. These data demonstrate that the seed coat contributes to winter dormancy of G. biloba, and that the phenology of this species is less primitive than popularly believed.

Answer 2

Definition of viviparous plant :Germinating while still attached to the parent plant. the viviparous seed of the mangrove.

Definition of oviparous animal : Ovoviviparous animals produce eggs, but instead of laying the eggs, the eggs develop within the mother's body. The eggs hatch within the mother. ... Some examples of ovoviviparous animals include some sharks (such as the basking shark) and other fish, snakes, and insects. It is the only form of reproduction for rays.