Which of the following have notochord throughout life?
Birds
Fish
Snake
Amphioxus
D.
Amphioxus
In chordates and sub- phylum Cephalochordates, notochord is present throughout life. In vertebrates, it is replaced by vertebral column.
Bacteria are considered plant because they
are green in colour
have rigid cell wall
have chlorophyll
have stomata
Eustachian canal connects
middle ear with external ear
middle ear with internal ear
external ear with internal ear
pharynx with middle ear
Which is common between earthworm, leech and centipede?
They have Malphigian tubules
They are hermaphrodite
They have ventral nerve cord
None of the above