Question 1 of 15beginner🧠 RememberFill in the Blanks5 marks

Fill in the blanks:

(i)

Fertilisation takes place in _____

Answer

ampullary-isthmic junction of fallopian tube

(a)

Humans reproduce _____ (asexually/sexually)

Answer

sexually

(b)

Humans are _____ (oviparous, viviparous, ovoviviparous)

Answer

viviparous

(c)

Fertilisation is _____ in humans (external/internal)

Answer

internal

(d)

Male and female gametes are _____ (diploid/haploid)

Answer

haploid

(e)

Zygote is _____ (diploid/haploid)

Answer

diploid

(f)

The process of release of ovum from a mature follicle is called _____

Answer

ovulation

(g)

Ovulation is induced by a hormone called _____

Answer

LH (Luteinizing Hormone)

(h)

The fusion of male and female gametes is called _____

Answer

fertilisation

(j)

Zygote divides to form _____ which is implanted in uterus.

Answer

blastocyst

(k)

The structure which provides vascular connection between foetus and uterus is called _____

Answer

placenta

Explanation

These fill-in-the-blank questions test fundamental concepts from Chapter 3 - Human Reproduction of NCERT Class 12 Biology. The answers cover key topics: (a-e) establish that humans are sexually reproducing, viviparous organisms with internal fertilisation and haploid gametes fusing to form a diploid zygote; (f-k) cover the reproductive process from ovulation through fertilisation to implantation and placental formation. These facts form the foundation for understanding human reproductive physiology.

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