What is Pseudocopulation in biology?
Pseudocopulation describes behaviors similar to copulation that serve a reproductive function for one or both participants but do not involve actual sexual union between the individuals. It is most generally applied to a pollinator attempting to copulate with a flower.
What is Pseudocopulation give an example class 12?
An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flowerr for the female of his species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called Pseudocopulation.
In which plant of petal of flower mimics female bee?
Small but flamboyant, the Bee Orchid is one of nature’s great mimics. The Bee Orchid is short and stocky with a rosette of leaves at ground level.
What is the role of Sporopollenin?
The outer wall or exine of pollen grains contains sporopollenin. It protects pollen grains from external factors such as temperature, acid, alkali, etc. Because of sporopollenin, pollen grains are preserved as fossils.
What is meant by Entomophilous flowers?
Insect-fertilizable or Entomophilous flowers are those which are sought by insects, for pollen or for nectar, or for both. Entomophilous: insect-loving: applied to plants especially adapted for pollination by insects.
What is known as the formation of gametes?
Gametes are formed through a process of cell division called meiosis. This two-step division process produces four haploid daughter cells. Haploid cells contain only one set of chromosomes. When the haploid male and female gametes unite in a process called fertilization, they form what is called a zygote.
Which of the following pseudocopulation with the flowers of Mediterranean orchid Ophrys?
The flower of the Mediterranean orchid Ophrys resembles totally the female structure of the bee. Bees misinterpret it as a female bee and perform a copulation process. This is known as pseudocopulation and in this way, the flower is pollinated. When the male wasp sees it gets attracted and proceeds to copulate it.
How do gymnosperms and angiosperms differ?
The key difference between angiosperms and gymnosperms is how their seeds are developed. The seeds of angiosperms develop in the ovaries of flowers and are surrounded by a protective fruit. Gymnosperm seeds are usually formed in unisexual cones, known as strobili, and the plants lack fruits and flowers.
What is sporopollenin in plant?
Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the tough outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments. Sporopollenin has found uses in the field of paleoclimatology as well.
What is sporopollenin and how it protects pollen grains?
Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of coniferous plants.
What is the function of Tapetum?
Tapetum is the innermost layer of the microsporangium. It provides nourishment to the developing pollen grains. During microsporogenesis, the cells of tapetum produce various enzymes, hormones, amino acids, and other nutritious material required for the development of pollen grains.