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What is the importance of amphimixis?

Important Questions on Reproduction in Lower and Higher Animals

EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
During oogenesis in mammals, the second meiotic division occurs
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
During fertilization, acrosome of sperm releases
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
During fertilization, zona pellucida of the ovum is dissolved by this enzyme released by the sperm
MEDIUM
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Describe the process of fertilization in human with the help of four sequential diagrams.
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
In human females, meiosis-II is not completed until?
MEDIUM
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization

Statement I : Penetration of sperm into ovum is a chemical process
Statement II : Acrosome of sperm secretes hyaluronidase which dissolves vitelline membrane of ovum

The correct option among the following is

EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Receptors for sperm binding in mammals are present on:
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Differentiate between male and female secondary sexual characters.
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Extrusion of second polar body from egg nucleus occurs
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Meiotic division of the secondary oocyte is completed
MEDIUM
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Fertilization in humans is practically feasible only if:
MEDIUM
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Write the name of gonadotropin hormone.
MEDIUM
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
What is the purpose of the reproductive system?
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
The gonadotropin-releasing hormone stimulates the release of
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Which of the following statements is incorrect?
MEDIUM
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
Name two types of gonadotropins. What stimulates their secretion in the human body?
EASY
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
What changes are visible in male and female human at the onset of puberty?
HARD
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
The sperm penetrates the ovum mainly
MEDIUM
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization
What are the functions of the gonadotropins in male reproductive system?
HARD
Biology>Reproduction>Reproduction in Lower and Higher Animals>Fertilization

Study the flow chart. Name the hormones labelled as A, B, C, D at each stage.

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Choose the correct option.

  A B C D
(1) Gn-RH ICSH Androgen FSH
(2) Gn-RH LH FSH Androgens
(3) Gonadotropins LH FSH Testosterone
(4) Gn-RH FSH LH Androgens