Biology, asked by rubku, 1 year ago

a.explain ovary?
b.explain ovules?
c.what does the stigma do?
d.what are pollen tubes ?
e.define imperfect flowers
f.perfect flowers definition?

Answers

Answered by btsarmy3694
0
HEY MATE......

answers......

a.Ovary, in botany, enlarged basal portion of the pistil, the female organ of a flower. The ovary contains ovules, which develop into seeds upon fertilization. It will mature into a fruit, either dry and parchmentlike or fleshy, enclosing the seeds.



b.Ovule, plant structure that develops into a seed when fertilized. In gymnosperms (conifers and allies) the ovules lie uncovered on the scales of the cone. In angiosperms (flowering plants), one or more ovules are enclosed by the ovary(portion of the carpel, or female reproductive organ).


c.The function of the stigma in a flower is as a pollen receptor. The stigma is a sticky tip on the top of a carpel.The stigma is contained inside of the pistil, which also contains the ovary, style and carpel. ... The carpel and its other parts can often be referred to as the gynoecium.



d. The pollen tube is the tube through which sperm from the pollen reaches the egg cell, and fertilises the plant to form seeds.

The pollen tube of most seed plants acts as a passageway. It transports sperm cells from the pollen grain, from the stigma (in flowering plants) to the ovules at the base of the pistil. Like ferns, other basal land plants, and many algae, some gymnosperms have flagellate sperm, which swim through a watery fluid to fertilize the egg cells.



e.A flower lacking one or more of the normal flower parts (the male (stamen), female (pistil), petals, and sepals) is called an incomplete flower

f. A flower that contains both male and female parts. It can pollinate itself and does not need wind,insects or other means to transfer it's pollen. The pollen is produced in the same flower that produces the seed. 

Tomatoes and peppers are examples of plants with perfect flowers.





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