Assertion (A) is true, as temperature-dependent sex determination occurs in many reptiles, where the temperature during incubation affects the offspring's sex.
Reason (R) is also true, as in some animals like reptiles, sex determination is not genetic but environmental.
Therefore, the correct answer is option (1).
What changes are observed in the uterus:
(i) Subsequent to the implantation of the zygote and
(ii) If an egg does not get fertilized?
Name the part performing the following functions in the human female reproductive system:
(i) Production of eggs
(ii) Site of fertilization
(iii) Site of implantation
(iv) Entry of the sperms
Why are testes in human males located outside the abdominal cavity in scrotum?
Select the option having correct matching of the organism given in Column I with the mode of reproduction in Column II: Column I {0.2cm}
Name the part performing the following functions in the human male reproductive system:
(a) Carries sperm
(b) Production of male gametes
(c) Whose secretion makes the transport of sperm easier
(d) Provides suitable temperature for sperm formation
Leaves of the sensitive plant move very quickly in response to ‘touch’. How is this stimulus of touch communicated and explain how the movement takes place?
Write the name of a hormone that plays a major role in (i) falling of leaves (ii) rapid cell division.
Name the movement which causes ‘X’ and ‘Y’ to grow downwards and upwards respectively. (Refer above figure)