Advertisements
Advertisements
प्रश्न
Pollen grains are formed by _________ division in locules of anthers.
विकल्प
meiosis
mitosis
amitosis
binary
Advertisements
उत्तर
Pollen grains are formed by meiosis division in locules of anthers.
APPEARS IN
संबंधित प्रश्न
Name the parts labelled as A, B, C and D in the diagram given below:-
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
State significance of pollination.
State the name of the functional unit concerned with sexual reproduction.
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
In the figure given alongside, the parts marked A, B and C are sequentially :
(a) cotyledon, plumule and radicle
(b) plumule, radicle and cotyledon
(c) plumule, cotyledon and radicle
(d) radicle, cotyledon and plumule
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
Mention the function of Anther.
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
Explain the process of fertilisation in flowers.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
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
Describe an activity to demonstrate phototropism.
List any two differences between pollination and fertilization.
Sketch the labeled diagram:
Flower with its sexual reproductive organs
Prepare a slogan for campaign against female foeticide.
Mention pollination types.
Differentiate between self-pollination and cross-pollination.
What does germination mean?
Explain the sexual reproduction process in plants with a diagram.
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
Which of the following is the outermost protective layer of anther?
Flowers showing ornithophily show few characteristic like ______.
Length of pollen tube depends on the distance between ______
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation.
What is the structural unit of sexual reproduction in plant?
Type of sexual reproduction is ______.
The pollen tube usually enters the embryo sac ______.
