Chondrichthyes is characterised by
Placoid scale
Placoid scale and ventral mouth
Ventral mouth
Ctenoid scale and ventral mouth
B.
Placoid scale and ventral mouth
Chodrichthyes (cartilaginous fishes) are marine. Their mouth is ventral and they have cartilaginous endoskeleton. Dermal placoid scales are present, e.g. Scoliodon, Pristis, etc.
“All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
How important is the presence of air bladder in Pisces?
What are the modifications that are observed in birds that help them fly?
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
Segmentation in the body is first observed in which of the following
Match the following:
Prepare a list of some animals that are found parasitic on human beings.
In some animal groups, the body is found divided into compartments with at least some organs/ organ repeated. This characteristic feature is named
Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?
Which one of the following sets of animals share a four chambered heart?
Mock Test Series
