Advertisements
Advertisements
प्रश्न
What is the exact difference between grades of organization and symmetry? Explain with examples.
Advertisements
उत्तर
Difference Between Grades of Organization and Symmetry are:
- Grades of Organization describes the way an organism's cells are arranged structurally:
- Cellular Level: Cells that are loosely organized (like Porifera).
- Tissue Level: Coelenterata and other similar cells form tissues.
- Organ Level: Platyhelminthes are examples of tissues that form organs.
- Organ System Level: Nematoda and Annelida are examples of organ systems.
- Symmetry describes how an organism's body can be separated into identical components.
- Asymmetry: Unable to be separated (sponges, for example).
- Radial Symmetry: Divided across several planes, radial symmetry (e.g., Hydra).
- Bilateral Symmetry: Split into two parts (humans, for example).
APPEARS IN
संबंधित प्रश्न
If you are given a specimen, what are the steps that you would follow to classify it?
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
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 |
Write the correct co-relation:
Annelida: Earthworm :: Platyhelminthes: _______
Label the body organization of human in the following figure:
Draw a neat and labelled diagram.
Jellyfish
Species is the ______ unit of classification.
The symmetry exhibited in cnidarians is ______.
Which of the following have the highest number of species in nature?
Compare Schizocoelom with enterocoelom.
What are flame cells?
Which organism is called Friends of farmers? Why?
In some animal groups, the body is found divided into compartments with serial repitition of at least some organs. This characteristic feature is called ______.
Which group of chordates possess sucking and circular mouth without jaws?
Provide appropriate technical term in the space provided.
Blood-filled cavity in arthropods ______.
Differentiate between open circulatory system and closed circulatory system
Sort out the animals on the basis of their symmetry (radial or bilateral) coelenterates, ctenophores, annelids, arthropods, and echinoderms.
Animal with bilateral symmetry in ______.
