Class 8 Reproduction In Animals CBSE Questions & Answers

Class 8 · Reproduction In Animals

This is Science Class 8 Reproduction in Animals CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Menstrual cycle is repeated at an average interval of
  • A
    25 days
  • B
    29 days
    Correct
  • C
    15 days
  • D
    One year
2
Cessation of menstrual cycle in female in female is known as
  • A
    Menarche
  • B
    Menopause
    Correct
  • C
    Parturition
  • D
    Ovulation
3
The process of delivery of the foetus is called
  • A
    Ovulation
  • B
    Gestation
  • C
    Parturition
    Correct
  • D
    Implantation
4
The embryo at 16-celled stage is called
  • A
    Morula
    Correct
  • B
    Blastula
  • C
    Blastomere
  • D
    Gastrula
5
Conversion of spematid into a spermatozoan is called
  • A
    Spermatogenesis
  • B
    Spermiogenesis
    Correct
  • C
    Cytokininesis
  • D
    Vitellogenesis
6
In most mammals, the testes are located in scrotal sac for
  • A
    Spermatogenesis
    Correct
  • B
    More space of visceral organs
  • C
    Independent functioning of kidney
  • D
    Sex determination
7
The release of egg from ovum is described as
  • A
    Ovulation
    Correct
  • B
    Insemination
  • C
    Reproduction
  • D
    Menstruation
8
In the male human, sperm contain 22 pairs of autosomes and
  • A
    One X-chromosome
  • B
    A pair of Y-chromosome
  • C
    One Y-chromosome
    Correct
  • D
    A pair X- chromosome
9
Foetal ejection reflex in human female is induced by
  • A
    Differentiation of mammary glands
  • B
    Any one of the following
  • C
    Release of Oxytocin from pituitary gland
    Correct
  • D
    Pressure exerted by amniotic fluid
10
The _________ is the sexual intercourse between male and female sex.
  • A
    Copulation
  • B
    Coition
    Correct
  • C
    Spermatogenesis
  • D
    None of these
11
The period between fertilization and birth is called as
  • A
    Parturition
  • B
    Germination
  • C
    Ovulation
  • D
    Gestation
    Correct
12
Which hormone controls metamorphosis in frogs?
  • A
    Thyroxin
    Correct
  • B
    Adrenal
  • C
    Insulin
  • D
    Growth hormone
13
Which of the following is correct statement?
  • A
    Boys attain puberty earlier than girls
  • B
    The mother is responsible for the sex of child
  • C
    Ovulation occurs in the middle of menstrual cycle
    Correct
  • D
    Menstruation starts at the age of 25
14
Which one is the most likely reason of not occurring regular menstrual cycle
  • A
    Maintenance of hypertropical endometrial lining
  • B
    Fertilization of ovum
    Correct
  • C
    Maintenance of high concentration of sex hormones
  • D
    Retention of corpus luteum
15
The yellowish coloured milk secreted from the breast shortly after birth of the baby is called
  • A
    None of these
  • B
    Primary milk
  • C
    Colostrum
    Correct
  • D
    Lactogen