Which of the following is the largest and most successful phylum of invertebrates?
a) arthropoda
b) platyhelminthes
c) echinodermata
d) mollusca
Explanation: it is having about 280000 species
The body of is covered by exoskeleton made up of …….
a) cellulose
b) calcium carbonate
c) chitin
d) mantle
Which of the following character of arthropods makes them most successful among animal kingdom?
a) due to jointed legs
b) due to light weight
c) due to chitinous exoskeleton
d) due to open circulatory system
Chitinous exoskeleton provide attachment to the muscles with the help of which arthropods show active locomotion by……
a) swimming
b) crawling and walking
c) flying
d) all of these
The body of arthropods can be differentiated into……..regions.
a) two
b) three
c) four
d) five
Explanation: 1. Head, 2. Thorax and 3. Abdomen
Which of the following are true about arthropods?
a) body cavity is haemocoel, circulatory system is closed, red blood
b) body cavity is haemocoel, circulatory system is open , green blood
c) body cavity is haemocoel, circulatory system is open, no blood pigments
d) body cavity is absent, circulatory system is closed, red blood
Explanation: blood is called haemolymph because it does not carry oxygen
