Tag: sexual reproduction in plants
Questions Related to sexual reproduction in plants
Root system grows from
-
Embryo of seed
-
Radicle of embryo
-
Plumule of embryo
-
Coleoptile
Roots system develops from the radicle of the embryo because in seed, the radicle grows downward into the soil to absorb water and nutrients from the soil.
............. is not unisexual flower.
-
Coconnut
-
Papaya
-
Gulmohar
-
Watermelon
The flowers wherein both the sex-organs, that is, the stamen and the pistil are present is called the bisexual or the hermaphroditic flowers. Those flowers wherein, only one of the sex-organ is present and the other is rudimentary absent, are called uni-sexual flowers. These can be pistillate when only pistil is present and can be staminate when only stamen is present.
Which of the following plants have unisexual flowers?
-
Datura
-
Hibiscis
-
Rose
-
Papaya
- Hibiscus, Rose, and Datura have bisexual flowers with both stamens and carpel.
- Papaya has unisexual flowers, male flowers, and female flowers are on separate plants.
- So, the correct answer is 'Papaya'.
Mature ovary forms the
-
Seed
-
Stamen
-
Pistil
-
Fruit
Fruits are formed by the maturation of one or more ovary. Fruits contain seeds resulting from the maturation of fertilized ovules. However, maturation of seed and fruit can occur in the absence of fertilization. In fleshy fruits, the outer covering is called as pericarp. Pericarp is again made of three layers, the epicarp, which is the outermost layer; the mesocarp, which is the middle layer; and the endocarp, which is the inner layer surrounding the ovary or the seeds.
Which of the following is a post fertilisation event in flowering plants?
-
Transfer of pollen grains
-
Embryo development
-
Formation of flower
-
Formation of pollen grains
In angiosperms, normally after fertilisation.
-
The zygote divides earlier than the primary endosperm nucleus
-
The primary endosperm nucleus divides earlier than the zygote
-
Both the zygote and primary endosperm nuclei divide simultaneously
-
Both the zygote and primary endosperm nuclei undergo a resting period
Endosperm is the nutritive tissue for the developing embryo and the seedlings. In angiosperm, the endosperm develops from triploid primary endosperm nucleus which is formed as a result of vegetative fertilization, triple fusion or fusion of male gamete with the secondary nucleus of the central cell. Generally, endosperm divides before zygote because it will provide nourishment to the developing zygote.
In angiosperms, triple fusion is required for formation of
-
Embryo
-
Endosperm
-
Suspensor
-
Fruit wall
The wheat grain is a
-
Fruit
-
Seed
-
Embryo
-
Glume
Wheat is a grain, which belongs to the grass family Poaceae or Gramineae. Wheat grain is a fruit (Caryopsis) that produces a dry edible seed which is commonly known as the kernel. Wheat grain is a small edible fruit, usually hard on the outside. Corn, grain sorghum, rice, oats, and rye are other examples of grains.
'Sonalika' is a variety of
-
Rice
-
Wheat
-
Maize
-
Bajra
Sonalika is developed from high yielding , semi dwarf , fertilizer responsive wheat variety .Sonalika is not an Indian wheat variety.
To form 100 angiosperm seeds, how many mitosis are required?
-
300
-
200
-
500
-
Can't say
For the formation of male gametophyte, 1 meiosis and 2 mitoses are required.