Advertisements
Advertisements
प्रश्न
Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower.
Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.
Advertisements
उत्तर
| Pollination | Fertilization |
| It is the process of transfer of pollen grains from the anther to the stigma of the pistil of the flower. | It is the process of fusion of male and female gametes resulting in the formation of zygote. |
| This process leads to fertilization. | This process leads to formation of seeds. |
| Pollen tube formation does not take place in pollination. | After pollination, pollen tube forms for fertilization to occur. |
| Pollination occurs in flowering plants. | Fertilization occurs in every living beings which undergo sexual reproduction. |
The site of fertilisation in the flower is the ovule present in the ovary.
The product of fertilisation of male and female gamete is the zygote.
APPEARS IN
संबंधित प्रश्न
What is menstrual cycle?
Identify True/False statement. Correct false statement to make it true.
Menstrual cycle ceases during pregnancy.
the Biological/technical term for Complete stoppage of menstrual cycle in females
Give appropriate biological or technical terms for the following:
The onset of menstruation in a young girl
Give Reasons
The chances of pregnancy to occur are most favourable on or about the 14th day of the menstrual cycle. Explain.
Describe the structure of a Graafian follicle.
Find the wrongly matched pair.
Menstruation begins due to ______.
In the absence of fertilization, corpus luteum ____________.
Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?
A human female reaches menopause aroung the age of ______.
A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.
| HORMONE A | HORMONE B | |
| Subject 1 | Shows a peak on the 14th Day of the menstrual cycle. | Falls down during the luteal phase. |
| Subject 2 | Shows a peak on the 14th Day of the menstrual cycle. | The level is maintained high in the luteal phase. |
Which structure in the ovary will remain functional in subject 2?
A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.
| HORMONE A | HORMONE B | |
| Subject 1 | Shows a peak on the 14th Day of the menstrual cycle. | Falls down during the luteal phase. |
| Subject 2 | Shows a peak on the 14th Day of the menstrual cycle. | The level is maintained high in the luteal phase. |
Which of the following statements is true about the subjects?
Which of the following events is not associated with ovulation in human females?
Write a short note on Proliferative Phase.
The egg is passed down through the oviduct by muscular contractions.
The onset of menstruation in women is called ______.
Longest phase of menstrual cycle is ______.
What is menarche?
How many phases does the menstrual cycle consist of?
