Advertisements
Advertisements
प्रश्न
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
पर्याय
(i) and (iv)
(ii), (iii) and (iv)
(iii) and (iv)
(i), (iii) and (iv)
Advertisements
उत्तर
(ii), (iii) and (iv)
Explanation -
Flowers which possess either stamens or pistil are called unisexual flowers. These flowers are borne either on the same or different plants thus, pollen grains need to be transferred from one flower to another through agents like wind, water or animals, that is, cross pollination occurs. Since fruits develop from the ovary of the pistil, unisexual flowers with stamens only cannot bear fruits.
APPEARS IN
संबंधित प्रश्न
Name the parts A, B and C shown in the diagram and write their functions.
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
The process of fusion of the male and female gametes is called ______.
Name the part made up of the stigma, style and ovary.
Name the male part of the flower.
Where are the pollen grains produced?
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
What is a flower ? Draw a neat labelled diagram showing the L.S. of a typical flower.
Fill in the blanks:
A carpel consists of ________ , ________ and ________.
Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:
Pollen grain, male gamete, female gamete, ovary.
Identify the odd. Stigma, Style, Pollen, Ovary.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Pollen grains from anther are transferred to the stigma.
Write the events involved in the sexual reproduction of a flowering plant.
a. Discuss the first event and write the types.
b. Mention the advantages and the disadvantages of that event.
The seed that contains the future plant is called the ______
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
What is the function of calyx?
The figure below shows the concept of double fertilization. Complete the flow chart showing the progress at each step:
What is puberty?
State the post-fertilisation changes that lead to fruit formation in plants.
