Which one of the following items gives its correct total number?
- Types of diabetes-3
- Cervical vertebrae in humans-8
- Floating ribs in humans-4
- Amino acids found in proteins-16
Answer
(3) Floating ribs in humans-4
Solution
As per NCERT, the last 2 pairs of ribs (11th and 12th) are not connected ventrally and are called floating ribs.
⇒ Total floating ribs = 2 2 = 4
Other items: diabetes mellitus is of 2 main types (Type I and Type II); cervical vertebrae in humans = 7; amino acids found in proteins = 20.
∴ Floating ribs in humans – 4 is correct.
Answer: (3)