Advertisements
Advertisements
प्रश्न
Give some examples of different modes of fertilisation in nature?
Advertisements
उत्तर
There are two modes of fertilisation, i.e., external fertilisation as seen in case of fishes and frogs, and internal fertilisation that happens in humans, dogs, etc.
APPEARS IN
संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
How does the process of fertilisation take place in flowers?
State the name of the functional unit concerned with sexual reproduction.
What are the reproductive organs in a flower?
What is the name of female part of a flower?
Name the part of a seed which contains stored food.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
In what ways is fertilisation in a plant similar to fertilisation in a human?
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
You have to perform the experiment, "To identify the different parts of an embryo of a gram seed." Describe the procedure that you would follow.
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Identify the odd. Stigma, Style, Pollen, Ovary.
A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope
Calyx : Sepals : : Corolla : ________________
Give scientific reason.
Flower is a structural unit of sexual reproduction in plants.
Which type of development is observed in male gametophytes of plants?
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
The process of release of eggs from the ovary is called ______
