Advertisements
Advertisements
प्रश्न
How can plants and animals save themselves from extinction?
Advertisements
उत्तर
Genetic variation helps the organisms to adjust with the changing environment and thereby to maintain their existence. Due to this, plants and animals can save themselves from being extinct.
APPEARS IN
संबंधित प्रश्न
When pregnancy does not occur, the life of corpus luteum is about ______.
The figure given alongside represents the female reproductive system of a mammal.
Name the parts labelled A - D
State whether the following statement is true or false:
Fertilization occurs in the vagina.
Write in sequence the regions in which a mature sperm travels from the seminiferous tubules up to the urethral opening?
Give Reasons
The acrosome of sperm secretes an enzyme called hyaluronidase at the time of fertilization
Differentiate between tubectomy and vasectomy.
Study the diagram given below and then answer the questions that follow:
(i) Name the part labeled A. Name any two hormones produced by the part labeled A.
(ii) What happens to the part labeled B.
(1) if fertilization takes place?
(2) If fertilization does not take place?
(iii) Where does fertilization occur?
(iv) Draw a neat diagram of the human sperm as seen under high magnification and label the following parts.
(1) Acrosome
(2) Mitochondria
Explain the term Cowper’s glands.
Give Technical Term:
What term is used for the production and maturation of sperms in the testes?
Give Technical Term:
The place where fertilization occurs in the female reproductive system.
Complete the following sentences with appropriate word:
One egg is normally released from the ovary in the human females after
__________
Write the functional activity of the following structure:
Seminal vesicles
Write a short note on fallopian tube.
Define.
Fertilization
Which parts are converted into Seed and fruit respectively after fertilization?
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
How many hours are required for the process of capacitation?
Explain tubectomy and vasectomy.
Match the pair:
| 'A' | 'B' | ||
| (1) | Male | (a) | 44 + XX |
| (b) | 44 + XY | ||
| (c) | 44 + YY |
Write the specific location of the following:
Acrosome
