Internal Fertilization
Trending Questions
Internal fertilisation is seen in
Pteridophytes, gymnosperms, angiosperms
Terrestrial fungi, reptiles
Birds, mammals, bryophytes
All of these
Which of the following situations correctly describe the similarity between an angiosperm egg and a human egg?
i Eggs of both are formed only once in a lifetime
ii Both the angiosperm egg and human egg are stationary
iii Both the angiosperm egg and human egg are motile transported
iv Syngamy in both results in the formation of zygote
Choose the statements that are true from the options below:
(a) ii and iv (b) iv only
(c) iii and iv (d) i and iv
In organisms exhibiting internal fertilisation -
Male gametes are always motile and female gametes are non-motile.
Male gametes are either motile or non-motile, but female gametes are always non-motile.
Male and female gametes are produced in equal numbers.
Large number of organisms are produced.
What is internal fertilization? Explain with an example.
The number of male gametes produced is much more than the number of female gametes in most organisms. The reason is that
this compensates the loss during transport
they are smaller in size than female gamete
they are produced by mitosis following meiosis
male gametes are flagellated
- Facilitates less expenditure of energy
- Both a and c
- Helps the cell to store extra nutrients for rapid embryo development
- Assists in rapid division of female gamete
In organisms exhibiting internal fertilization
all the above are true
the male gamete is motile
the number of male gametes produced is large
there is reduction in the number of eggs produced
- The fusion of gametes occurs within the body
- Internal fertilisation occurs in amphibians
- Sperms are produced in large numbers
- In angiosperms, non-motile male gametes are carried to female gamete by pollen tubes
Name an animal where fertilization takes place outside the female body.
The structure that connects the placenta with the fetus is_______.
Insemination is the discharge of semen into the vagina.
- True
- False
Do all animals have two ovaries?
In reptiles and birds, the fertilized eggs are laid, covered with hard calcareous shell.
False
True
What is a Sterile?-Like a Mule
In reptiles and birds, the fertilized eggs are laid, covered with hard calcareous shell.
True
False
- copulation and fusion of gametes is passive
- production of large numbers of gametes is unnecessary
- fewer individuals are produced
- new off-springs are exactly like the parent
Internal fertilisation is seen in
Terrestrial fungi, reptiles
Birds, mammals, bryophytes
Pteridophytes, gymnosperms, angiosperms
All of these
- Most terrestrial animals practice internal fertilisation.
- Amphibians, birds, and reptiles practice internal fertilisation.
- Many terrestrial males have a copulatory organ for sperm transfer.
- Internal fertilisation is required for the production of shelled eggs.
| Column I | Column II |
| (P) External fertilisation | (i) Earthworm |
| (Q) Internal fertilisation | (ii) Cockroach |
| (R) Bisexual | (iii) Frogs and Fishes |
| (S) Unisexual | (iv) Birds and mammals |
- P−(iv), Q−(iii), R−(ii), S−(i)
- P−(iv), Q−(iii), R−(i), S−(ii)
- P−(iii), Q−(iv), R−(ii), S−(i)
- P−(iii), Q−(iv), R−(i), S−(ii)
- mating between 2 diseased individuals
- birth of twins
- consanguineous mating
- birth of a male and female child
- Is extra chromosomal material representing the X chromosome in each female cell
- Allow a reduction in chromosomes while preserving all the food for one egg
- Nurse the egg as it leaves the follicle
- Orient the sperm toward the egg
Where is this ovum fertilized under normal conditions?
Write difference between external and internal fertilization.
- sporophyte
- sporogonium
- prothallus
- microsporophyll
In organisms exhibiting internal fertilisation -
Male gametes are always motile and female gametes are non-motile.
Male gametes are either motile or non-motile, but female gametes are always non-motile.
Male and female gametes are produced in equal numbers.
Large number of organisms are produced.
