Reproduction in...

In human beings, after fertilisation, the structure which gets embedded in the wall of uterus is 

A few statements with regards to sexual reproduction are given below:
(i) Sexual reproduction does not always require two individuals
(ii) Sexual reproduction generally involves gametic fusion
(iii) Meiosis never occurs during sexual reproduction
(iv) External fertilisation is a rule during sexual reproduction
Choose the correct statements from the options below:

A few statements describing certain features of reproduction are given below:
(i) Gametic fusion takes place.
(ii) Transfer of genetic material takes place
(iii) Reduction division takes place
(iv) Progeny have some resemblance with parents
Select the options that are true for both asexual and sexual reproduction from the options given below :

Which one of the following is oviparous ?

Birds are - 

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because:

A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is:

There are various types of reproduction. The type of reproduction adopted by an organism depends on :

Choose the correct statements from amongst the following: 

Which one of the following organisms reproduces sexually only once in its life time?