6) write four distinguishing characters of class mammal.
Answers
Answered by
3
Explanation:
Characteristics of Mammals
The presence of hair or fur.
Sweat glands.
Glands specialized to produce milk, known as mammary glands.
Three middle ear bones.
A neocortex region in the brain, which specializes in seeing and hearing.
Specialized teeth.
A four-chambered heart.
Answered by
2
Answer:
1) Echinodermata have an endoskeleton of calcareous ossicles hence, the name derived as Echinodermata
2) The digestive system is complete with the mouth on the lower side and anus on the upper side.
3) The most distinctive feature of these organisms is the presence of the water vascular system which helps in locomotion, capture and transport food and respiration.
4) The excretory system is absent in echinoderms.
Similar questions