Advertisements
Advertisements
प्रश्न
Choose the term that does not belong in the following group and explain why it does not belong?
Notochord, cephalisation, dorsal nerve cord and radial symmetry.
Advertisements
उत्तर
- Notochord, cephalisation, dorsal nerve cord and radial symmetry.
- Notochord, cephalisation and dorsal nerve cord are the characteristic features of chordates. The radial symmetry is not a characteristic feature of chordate. It is the feature of cnidarian and adult echinoderms. Hence it does not belong to the group.
संबंधित प्रश्न
If you are given a specimen, what are the steps that you would follow to classify it?
Distinguish between intracellular and extracellular digestion.
What is the difference between direct and indirect development?
Write in brief about progressive changes in animal classification.
Complete the following chart.
| Body cavity | Germ Layer | Phylum |
| Absent | ______ | Porifera |
| Absent | Triploblastic | ______ |
| Pseudocoelom | ______ | Aschelminthes |
| Present | ______ | Arthropoda |
The symmetry exhibited in cnidarians is ______.
Which of the following is a crustacean?
Lateral line sense organs occur in ______.
Compare Schizocoelom with enterocoelom.
Observe the animal below and answer the following questions.
- Identify the animal.
- What type of symmetry does this animal exhibit?
- Is this animal Cephalized?
- How many germ layers does this animal have?
- How many openings does this animal’s digestive system have?
- Does this animal have neurons?
______ was a greek philosopher who classified animals.
Which organism is called Friends of farmers? Why?
Identify the phylum in which adults exhibit radial symmetry and larva exhibit bilateral symmetry.
Which group of chordates possess sucking and circular mouth without jaws?
Differentiate between a diploblastic and a triploblastic animal.
Complete the paragraph using proper words:
(Asymmetrical, Paramecium, Equal, imaginary, central, insects, rats, bird, three, unequal)
If body of any animal is cut through ______ axis of body, it may or may not produce two equal halves. Depending upon this property, there are different types of animal bodies. In the case of ______ body, there is no any such imaginary axis of the body through which we can get two equal halves. For example Amoeba, ______ some sponges. In radial symmetry type of body, if imaginary cut passes through central axis but any plane of body, it gives two ______ halves. For example Starfish. In case of this animal, there are five different planes passing through ______ axis of body through which we can get two equal halves. In Bilateral symmetry type of body, there is only one such imaginary axis of body through which we can get two equal halves. For example: ______ fishes, frog, birds, human, etc.
