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Test: Fertilization and Implantation (NCERT) - NEET MCQ


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10 Questions MCQ Test Biology Class 12 - Test: Fertilization and Implantation (NCERT)

Test: Fertilization and Implantation (NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Fertilization and Implantation (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Fertilization and Implantation (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Fertilization and Implantation (NCERT) below.
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Test: Fertilization and Implantation (NCERT) - Question 1

Identify the human development stage shown below as well as the related right place of its occurrence in a normal pregnant woman and select the right option for the two, together

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 1

After fertilisation, a single-celled zygote develops into a multicellular structure called blastocyst. This blastocyst then gets embedded in the endometrium of the uterus and the process is known as implantation.

Test: Fertilization and Implantation (NCERT) - Question 2

Given below are four statements (i)-(iv) regarding embryonic development in humans.
(i) Cleavage divisions bring about considerable increase in the mass of protoplasm.
(ii) With more cleavage divisions, the resultant blastomeres become smaller and smaller.
(iii) The blastomeres in the blastocyst are arranged into two layers, trophoblast and endometrium.
(iv) Cleavage divisions result in a solid ball of cells called morula.
Which of the above two statements are correct?

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 2

Cleavage is a series of rapid mitotic divisions of the zygote, characterised by absence of growth in daughter cells, which converts a single celled zygote into a multicellular structure called blastocyst. It starts in the Fallopian tube and is holoblastic. Interphase in cleavage division is short and don not involve growth so that the resulting blastomeres become smaller in size as their number increases. During cleavage, at 8-16 celled stage, a solid ball of cells called morula (as it look like mulberry) is formed.

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Test: Fertilization and Implantation (NCERT) - Question 3

In human adult females, oxytocin

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 3

In human adult females, oxytocin is a hormone released by the pituitary gland (neurohypophysis), that causes contraction of the uterine muscles during labour.

Test: Fertilization and Implantation (NCERT) - Question 4

Match column I with column II and select the correct option from the codes given.

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 4

let's analyze the terms:

  • Cleavage refers to a series of rapid mitotic divisions.
  • Morula is a stage in embryonic development, often described as a "little mulberry" due to its appearance.
  • Polyspermy refers to the fertilization process involving multiple sperm.
  • Implantation refers to the embedding of the embryo into the endometrium of the uterus.

Now let's match these terms:

  • Cleavage - (ii) Mitotic divisions
  • Morula - (iv) Little mulberry
  • Polyspermy - (i) Fertilization
  • Implantation - (iii) Endometric

Correct option is A. 

Test: Fertilization and Implantation (NCERT) - Question 5

The sperms undergo physiological maturation, acquiring increased motility and fertilizing capacity in?

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 5

In the epididymis, the sperms mature physiologically, gaining increased motility and fertilising capacity.
The epididymis is a long, coiled tube that holds sperm until it is ejaculated. Sperm develops in the epididymis, a long twisted tube. The epididymis' tail attaches to the vas deferens, which transports sperm to the ejaculatory duct. In the epididymis, sperm gain motility.

Test: Fertilization and Implantation (NCERT) - Question 6

The daughter cells formed as a result of cleavage of a zygote are called ________

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 6
  • Zygote undergoes cleavage producing an exponential increase in cell mass.
  • These new daughter cells formed are called blastomeres.
  • They form a blastula with a blastocoel cavity enclosed in between.
Test: Fertilization and Implantation (NCERT) - Question 7

Fill up the blanks in the following paragraph by selecting the correct option.
During copulation (coitus), semen is released by the penis into the vagina and is called  (i) . The ovum released by the ovary is transported to the  (ii)  where  (iii)  takes place. During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of  (iv) . The secretions of the  (v)  help the sperm enter into the cytoplasm of the ovum.

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 7

Insemination is the process of the release of semen by the penis into the vagina during copulation. The sperm is released into the female reproductive part. This sperm released travels through the cervix enters to the ureter and reached the junction of the isthmus and ampulla and this is the region of fertilization or fusion. the sperm and the ovum should be transported to this junction at the same time. Zona pellucida that contacts the sperm brings about changes in the egg membrane and blocks the entry of additional sperms as a result. The secretions of the acrosome a part of the head of the sperm that includes enzymes to penetrate the ovum helps the sperm enter into the cytoplasm of the ovum.

So, the correct option is '(i) - insemination, (ii) - ampullary isthmic junction, (iii) - fertilization, (iv) - additional sperms, (v) - acrosome'.

Test: Fertilization and Implantation (NCERT) - Question 8

The last process that leads to pregnancy is called _________

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 8
  • Fertilization is one of the first processes that may result in pregnancy.
  • Cleavage is the division of zygote that give rise to blastomeres.
  • Lactation occurs to post-pregnancy. Implantation is the attachment of the developing embryo to the uterine wall.
  • This is the last step that leads to pregnancy.
Test: Fertilization and Implantation (NCERT) - Question 9

Implantation takes place after __________ of fertilisation.

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 9

Implantation is embedding of the blastocyst into the endometrium of the uterus. Implantation begins about 7th day after fertilization of ovum and it takes about 3 days for the process to be completed.

Test: Fertilization and Implantation (NCERT) - Question 10

Besides activating the egg, another role of a sperm is to carry __________.

Detailed Solution for Test: Fertilization and Implantation (NCERT) - Question 10

During fertilization, the head of the sperm containing nucleus (DNA) enters the egg leading to formation of diploid zygote.

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