Choose the correct answers from the alternatives given. Which of the following is a true statement?
A
In all mammals, offspring develop within the female.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
All mammals have hair and mammary glands.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
All mammals are land-dwelling forms.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
All of the above.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is B All mammals have hair and mammary glands. Unlike other vertebrates, mammals nurse their young with milk produced by mammary glands. Though they're present in both males and females, in most mammal species mammary glands only fully develop in the females, hence the presence of smaller nipples on males (including male humans) also all mammals have hair at some point in their life. Not all mammals are land dwelling (dolphins)
So, the correct option is, 'all mammals have hair and mammary glands'.