1st Year Biology Chapter 9 Notes

• Important Multiple Choice Questions of 1st Year Biology Chapter 9 Notes of First-year Biology.
• Important Fill in the blanks of Chapter Number 9: Kingdom Plantae of First-year Biology.
• Important Short Questions of Chapter Number 9: Kingdom Plantae of First-year Biology.
• 1. The earlies group of vascular plants is: (a) Pteropsida (b) Psilopsida (c) Sphenopsida (d) Lycopsida
• 2. Tracheophytes are called vascular plants because of the presence of: (a) Spore (b) Vascular tissue (c) Gamete (d) None of these
• 3. The tracheophytes are further sub - divided into ……… sub-divisions?  (a) 1 (b) 2 (c) 3 (d) 4
• 4. Which of the following is a modified leaf? (a) Thorn (b) Tendril (c) Both A & B (d) Flower
• 5. The process of evolution of leaf was completed in more than: (a) 15 - 16 million year (b) 15 - 17 million year (c) 15 - 19 million year (d) 15 - 20 million year
• 6. Which of the following were the first plants that formed true leaves and roots? (a) Ferns (b) Lycopods (c) Megaphylls (d) Psilopsids
• 7. When the form in immature and young , it is coiled , this pattern of development is called: (a) Reticulate (b) Circum nutation (c) Nutation (d) Circinate vernation
• 8. Large leaves having divided veins and veinlet’s with an expanded leaf blade or lamina are known as: (a) Microphylls (b) Compound leaf (c) Megaphylls (d) Frond
• 9. Arrangement of unequal dichotomies in one plane is termed as: (a) Webbing (b) Planation (c) Fusion (d) Overtopping
• 10. The leaves are called fronds in class: (a) Sphenopsida (b) Gymnospermae (c) Filicineae (d) Angiospermae
• 11. Sori are protected by the bent margin of the leaflet , forming false: (a) Annulus (b) Indusium (c) Capsule (d) Stomium
• 12. The leaves bearing sporangia are called: (a) Leaflets (b) Megaphylls (c) Sporangiophylls (d) Sporophylls 
• 13. All seed producing plants are called: (a) Bryophytes (b) Spermatophytes (c) Trachaeophytes (d) Pteridophytes
• 14. Technically a seed may be defined as a fertilized:  (a) Cilia (b) Oospore (c) Ovule (d) Egg 
• 15. The microspores produced inside mircroporangia germinated to form: (a) Male gametophyte (b) Microgametophyte (c) Both A & B (d) Female gematophyte
• define spike. Ans: A racemose inflorescence is which the flowers are sessile and borne on an elongated axis as in wheat. 
• The chance of survival and development of wind blown pollen grains are much less than those of spores of Adiantum. Comment on this statement. Ans: Although spores of Adiantum are also dispersed by wind, however when a spore falls on a moist soil, it germinates at suitable temperature and produces a haploid gametophyte or prothallus. But is case of wind-blown pollen grains, if they fall on soil, they are wasted. for their survival and development it is must for then to fall on the stigma of flower.
• What is seed? Why is the seed a crucial adaptation to terrestrial life? Ans: Seed a Crucial Adaption to Terrestrial Life:  The seed offers maximum degree of protection to a developing embryo under the unfavorable terrestrial environment. The development and evolution of seed habit was a great success and a giant leap which ultimately enabled plants to colonize land permanently. Seed:  Technically a seed may be defined as a fertilized ovule. An ovule is an integumented indehiscent megasporangium. Integuments are specialized protective coverings around megasporangium which vary in number.