Fill in the blanks

Gymnosperms and Angiosperms

1. Gymnosperms are called naked seeded plants because their seeds are not enclosed in a __________.
2. The ovules of gymnosperms remain __________ before and after fertilisation.
3. Sequoia is one of the __________ tree species.
4. The roots of gymnosperms are generally __________ roots.
5. In Pinus, roots show fungal association called __________.
6. In Cycas, specialised roots associated with cyanobacteria are called __________ roots.
7. The leaves of conifers are usually __________-like.
8. Thick cuticle and __________ stomata help reduce water loss in gymnosperms.
9. Gymnosperms are __________ because they produce microspores and megaspores.
10. Sporangia are borne on leaf-like structures called __________.
11. Compact cone-like structures formed by sporophylls are called __________.
12. Male cones are also called __________ strobili.
13. The male gametophyte of gymnosperms is called a __________ grain.
14. Female cones are also called __________ strobili.
15. The central tissue of the ovule is called __________.
16. The protective coverings around the nucellus are called __________.
17. The female gametophyte bears female sex organs called __________.
18. Pollination in gymnosperms mainly occurs through __________ currents.
19. After fertilisation, the zygote develops into an __________.
20. The seeds of gymnosperms are __________ because they are not covered by fruits.
21. Angiosperms are commonly known as __________ plants.
22. In angiosperms, pollen grains and ovules are produced inside __________.
23. In angiosperms, seeds are enclosed within __________.
24. Wolffia is the __________ flowering plant.
25. Eucalyptus may grow over __________ metres tall.
26. Angiosperms provide us with food, fodder, fuel and __________.
27. Angiosperms are divided into __________ classes.
28. Seeds with two cotyledons belong to __________.
29. Seeds with one cotyledon belong to __________.
30. The male gametes in gymnosperms are carried to the archegonia through the __________ tube.
Short Questions
1. Why are gymnosperms called naked seeded plants?
2. Name the tallest gymnosperm tree.
3. What type of roots are found in gymnosperms?
4. What are mycorrhizal roots?
5. What are coralloid roots?
6. Why are needle-like leaves present in conifers?
7. What is heterospory?
8. What are strobili?
9. What is a pollen grain?
10. What are microsporangiate strobili?
11. What are macrosporangiate strobili?
12. Name a gymnosperm in which male and female cones occur on the same plant.
13. Name a gymnosperm in which male and female cones occur on different plants.
14. What is an ovule?
15. How are gymnosperms different from bryophytes and pteridophytes?
16. How does pollination occur in gymnosperms?
17. What develops from the zygote in gymnosperms?
18. What are angiosperms?
19. Where are pollen grains and ovules formed in angiosperms?
20. Name the smallest flowering plant.
21. Name a very tall angiosperm tree.
22. Mention any two economic uses of angiosperms.
23. Into how many classes are angiosperms divided?
24. What are dicotyledons?
25. What are monocotyledons?
MCQs

Gymnosperms and Angiosperms


1. Gymnosperms are called naked seeded plants because:
A. They do not produce seeds B. Seeds are not enclosed in fruits C. Seeds are very small D. Seeds are green in colour
2. Which gymnosperm is one of the tallest tree species?
A. Cycas B. Pinus C. Sequoia D. Cedrus
3. Mycorrhizal roots are found in:
A. Cycas B. Pinus C. Cedrus D. Sequoia
4. Coralloid roots associated with nitrogen-fixing cyanobacteria are found in:
A. Pinus B. Cycas C. Cedrus D. Sequoia
5. Needle-like leaves in conifers help to:
A. Increase transpiration B. Store food C. Reduce water loss D. Attract insects
6. Gymnosperms are heterosporous because they produce:
A. Roots and stems B. Flowers and fruits C. Microspores and megaspores D. Xylem and phloem
7. The male cone in gymnosperms is called:
A. Macrosporangiate strobilus B. Microsporangiate strobilus C. Archegonium D. Ovule
8. The highly reduced male gametophyte in gymnosperms is:
A. Ovule B. Embryo C. Pollen grain D. Nucellus
9. Female cones of gymnosperms bear:
A. Microsporangia B. Ovules C. Pollen grains D. Rhizoids
10. In which gymnosperm are male and female cones borne on the same plant?
A. Cycas B. Pinus C. Marchantia D. Funaria
11. The female gametophyte in gymnosperms develops from:
A. Microspore B. Megaspore C. Zygote D. Pollen grain
12. Pollination in gymnosperms usually occurs through:
A. Water B. Insects C. Wind D. Animals
13. In gymnosperms, the ovule develops into:
A. Fruit B. Flower C. Seed D. Cone
14. Which of the following is absent in gymnosperms?
A. Seeds B. Vascular tissue C. Fruits D. Roots
15. Angiosperms are also known as:
A. Non-vascular plants B. Flowering plants C. Seedless plants D. Amphibians of plant kingdom
16. In angiosperms, seeds are enclosed within:
A. Cones B. Sporangia C. Fruits D. Strobili
17. Which is the smallest flowering plant?
A. Wolffia B. Eucalyptus C. Pinus D. Cycas
18. Which angiosperm may grow more than 100 metres tall?
A. Wolffia B. Marchantia C. Eucalyptus D. Funaria
19. Angiosperms are divided into:
A. Algae and fungi B. Liverworts and mosses C. Monocotyledons and dicotyledons D. Gymnosperms and bryophytes
20. Plants with one cotyledon are called:
A. Dicotyledons B. Bryophytes C. Monocotyledons D. Pteridophytes

Gymnosperms and Angiosperms