Which one of the following organisms bears hollow
and pneumatic long bones?
AI-generated explanation. Check against your textbook.
Explanation:
Option 1, Neophron, is a bird. Birds have hollow and pneumatic long bones that are connected to air sacs, making the bones light for flight. This feature is described in NCERT biology when explaining the skeletal system of birds. The other options are non-bird animals: Hemidactylus is a reptile (gecko); Macropus is a mammal (kangaroo); Ornithorhynchus is a monotreme mammal (platypus). Their bones are not hollow and pneumatic like birds’ bones.
🧠 Did You Know?
Bird bones are often filled with air spaces that reduce weight without sacrificing strength, aiding flight.
💡 NCERT Memory Line:
Birds possess hollow, pneumatic long bones connected to air sacs, aiding flight and reducing weight.
Read the following statements.
A. Metagenesis is observed in Helminths.
B. Echinoderms are triploblastic and coelomate
animals.
C. Round worms have organ-system level of body
organization.
D. Comb plates present in ctenophores help in
digestion.
E. Water vascular system is characteristic of
Echinoderms.
Choose the correct answer from the options given
below.
The fruit fly has 8 chromosomes (2n) in each cell.
During interphase of Mitosis if the number of
chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase?