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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?

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प्रश्न

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?

लघु उत्तरीय
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उत्तर

Dogs have multiple births, so several eggs are released and develop at the same time. If fertilised, each egg implants in the uterine wall and develops into a puppy. The gestation period in dogs is about 56 to 72 days, and a typical litter contains approximately six puppies, although this number may vary depending on the breed. Therefore, it can be concluded that approximately 6 eggs were released by the ovary, resulting in the birth of 6 puppies.

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अध्याय 2: Human Reproduction - EXERCISES [पृष्ठ ४०]

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एनसीईआरटी Biology [English] Class 12
अध्याय 2 Human Reproduction
EXERCISES | Q 21. | पृष्ठ ४०
नूतन Biology [English] Class 12 ISC
अध्याय 2 Human Reproduction
NCERT EXERCISES | Q 21. | पृष्ठ ११७

संबंधित प्रश्न

Where in the fallopian tube does fertilization occur in humans?


Describe the human female reproductive system with a labelled diagram.


Choose the odd one in each of the following: 

Sperm; implantation; fertilization; ovum; ovum; after birth. 


Rewrite the terms in the correct order so as to be in a logical sequence.

Sperm duct, penis, testes, sperms, semen.


Explain with examples types of asexual reproduction in unicellular organisms.


After puberty human female shows cyclic changes in her reproductive system. Explain structural and hormonal changes in the uterus.

                                      (OR)

Give reasons :
(1) Scrotal sac serves as thermoregulator.
(2) Corpus luteum gets converted into corpus albicans in absence of fertilization.
(3) Missing of menses is the first indication of pregnancy.
(4) Surgical sterilization is a permanent method of birth control. (5) Human egg is microlecithal.


Complete the following statement by choosing the correct alternative:
Menstrual flow is a character is the feature of ______.


Differentiate between the graafian follicle and corpus luteum.


The adjoining figure represents the female reproductive organ of the humans

(i) How does the human embryo developing in the uterus obtain its nourishment?
(ii) Which structure protects and nourishes the developing embryo?
(iii) Define ovulation.


Name the Following

The female copulatory organ in humans.


Complete the following sentences with appropriate word:

A hormone secreted in a female to facilitate parturition is ________.


Write the functional activity of the following structure:

Inguinal canal


The stalk of the ovule is called a pedicle.


Identify the layer that makes up the corona radiate.


Which of the following statements regarding human reproduction is INCORRECT?


The part of fallopian tube closest to the ovary is ______.


Ovulation occurs under the influence of ______.


Which part of ovary in mammals acts as an endocrine gland after ovulation?


Bartholin’s glands are situated ______.


To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.

If the peak of Hormone A does not appear in the study for Subject 1, which of the following statement is true?


Capacitation occurs in:


In absence of fertilization, corpus luteum degenerates into ______.


Rewrite the terms in the correct order so as to be in a logical sequence.

Graafian follicle, ostium, uterus, fallopian tube, ovum.


The ______ is also called the womb.


What encloses the ovarian stroma?


Female gametes, namely ova/ovum, are produced through which process?


Which uterine layer undergoes cyclical changes during the menstrual cycle and is the site of implantation?


Which structure is a thin membrane partially covering the vaginal opening and has variable presence?


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