Advertisements
Advertisements
Question
Give an account on phylum Arthropoda.
Solution
- Arthropoda is the largest phylum.
- The organisms have jointed legs.
- The body is segmented into head, thorax and abdomen.
- The exoskeleton is made up of chitin.
- The coelomic cavity is filled with haemolymph (blood).
- They do not have defined blood vessels. This is called open circulatory system.
- The insects shed the exoskeleton and this process is called moulting.
- Small Arthropods absorb oxygen through the body and larger aquatic species breathe through book gills.
- Land Arthropods breathe through a system of tiny body tubes called tracheae.
- Excretion occurs through malphigian tubules and through green glands in crabs and prawns. .
- Insects, spiders, crabs, shrimps, butterflies, millipedes, centipedes, and scorpions are some arthropods.
APPEARS IN
RELATED QUESTIONS
Find an odd one out.
Which animal has three pairs of legs?
Observe the following figure and answer the following.
- Due to which common characteristic the animals shown in the figure belong to the same phylum?
- The exoskeleton of these animals is made up of which chemical?
- Give another two examples of this phylum.
Answer the questions based on the given paragraph.
Lady Bug Beetle
Lady bug beetles are friends of farmers as they destroy harmful insects. It is a predatory insect, which lives on biting worm, white fly worm, white moth, flower insects and bread worms. It acts as a natural insecticide for crops like maize, jawar, cotton, sugarcane, cereals, vegetables, fruit trees, etc. These are attractive red or yellow or grey coloured insects. Many species of this insect are found in our farms. The lifecycle of this insect follows eggs, larvae, cocoon and moth stages. The eggs are found in flutter. The larvae are grey in colour. Larvae and adults both live on sucking insects.
- How does the lady bug beetle live?
- Of which colour the lady bug beetles are?
- State the stages of its lifecycle.
- How does it help the farmers?
Which among the following have an open circulatory system?
- Arthropoda
- Mollusca
- Annelida
- Coelenterata
Assertion (A): The Arthropods have an open circulatory system.
Reason (R): The cells and tissues are bathed in blood.
One of the representatives of phylum Arthropoda is
Excretory organs of arthropods are ______.
Which one of the following statements is incorrect?
Write the correct co-relation.
Butterfly : Arthropoda : : Earthworm : ______.
