Very short Answer Type Questions
Very short Answer Type Questions
Q.1. Charles Darwin first described the idea of evolution in this book “The Origin Of Species”. Develop the definition of evolution.
Ans. According to Charles Darwin, life forms that have arisen by an accumulation of changes in body design that help the organism possessing these changes to survive better is called evolution.
Q.2. Where are seeds of gymnosperms formed ?
Ans. Seeds of gymnosperms usually develop on the surface of scales or leaves.
Q.3. Who gave the five kingdom system of classification ?
Ans. R.H. Whittaker.
Q.4. What is symbiosis?
Ans. Obligatory mutually beneficial association is known as symbiosis.
Q.5. What is haemocoel?
Ans. The blood filled cavity is known as haemocoel.
Q.6. Which group of animals have haemocoel ?
Ans. Arthropoda and Mollusca have haemocoel.
Q.7. How many chambers are present in the heart of fishes and frogs ?
Ans. Two chambers of heart are present in fishes and frogs have three chambers in their heart.
Q.8. Who proposed the two kingdom classification ?
Ans. Carolus Linnaeus.
Q.9. State the phylum to which liver fluke and Planaria (SAII-2013, 2014) belong.
Ans. Phylum Platyhelminthes.
Q.10. Name the phylum to which Leech and Earthworm belong.
Ans. Annelida.
Q.11. Name an organism sensitive to SO₂ in air.
Ans. Lichens.
Q:12. Echinoderms have a system that they use for moving around. Name the system. What is their skeleton made-up of ?
Ans. Water-driven tube system, Hard calcium carbonate structures.
Q.13. What do you understand by diploblastic ? Give one example of an organism which is diploblastic.
Ans. When the body of an organism is made of two layers of cells, it is called diploblastic, e.g., Hydra, jellyfish, etc.
Q.14. Homo sapiens is the scientific name of human beings. What do these two terms imply ?
Ans. Homo is the generic name and sapiens is the name of species.
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