Questions on Angiosperms
Multiple-Choice Questions: Angiosperms
1. What feature is unique to angiosperms among seed plants?
A) Vascular tissue
B) Cones
C) Flowers and fruits
D) Spores
E) Naked seeds
2. Angiosperm seeds are enclosed within:
A) Pollen
B) Cones
C) Fruits
D) Cotyledons
E) Ovules
3. The reproductive organ of angiosperms is the:
A) Root
B) Stem
C) Leaf
D) Flower
E) Fruit
4. Which structure develops into the fruit in angiosperms?
A) Ovule
B) Pollen tube
C) Ovary
D) Seed coat
E) Sepal
5. Double fertilization in angiosperms results in the formation of:
A) Two embryos
B) One embryo and one endosperm
C) One embryo and one seed coat
D) Two seeds
E) Fruit and pollen
6. Which structure contains the female gametophyte in a flower?
A) Anther
B) Filament
C) Ovule
D) Pollen
E) Style
7. Which part of the flower receives pollen during fertilization?
A) Ovule
B) Stigma
C) Ovary
D) Style
E) Petal
8. The male part of a flower is called the:
A) Pistil
B) Ovule
C) Sepal
D) Stamen
E) Stigma
9. The two classes of angiosperms are:
A) Monocots and dicots
B) Gymnosperms and mosses
C) Ferns and mosses
D) Bryophytes and pteridophytes
E) Taproots and fibrous roots
10. A monocot is characterized by:
A) Two cotyledons
B) Branching leaf veins
C) Vascular bundles in a ring
D) Flower parts in multiples of three
E) Taproot system
11. Which of the following is a dicot characteristic?
A) Parallel leaf veins
B) One cotyledon
C) Fibrous roots
D) Flower parts in multiples of three
E) Net-like venation
12. Pollination in angiosperms can be aided by:
A) Animals
B) Wind
C) Water
D) All of the above
E) None of the above
13. What is the main function of petals?
A) Protect the ovule
B) Attract pollinators
C) Absorb sunlight
D) Support the stigma
E) Produce seeds
14. The endosperm in angiosperms is:
A) The embryo's protective layer
B) A nutrient-rich tissue that feeds the embryo
C) A type of seed coat
D) The developing ovule
E) A part of the root
15. In angiosperms, the seed develops from the:
A) Ovary
B) Style
C) Pollen tube
D) Ovule
E) Filament
16. Which of the following is a key evolutionary advantage of angiosperms?
A) Naked seeds
B) Wind fertilization
C) Flowering structures
D) Lack of roots
E) Spore production
17. The main function of fruit is to:
A) Support the stem
B) Attract pollinators
C) Produce chlorophyll
D) Protect and disperse seeds
E) Absorb nutrients
18. Which part of the flower develops into the seed?
A) Ovule
B) Ovary
C) Stigma
D) Sepal
E) Anther
19. Angiosperms differ from gymnosperms in that they:
A) Lack flowers
B) Have needle-like leaves
C) Produce enclosed seeds
D) Do not reproduce sexually
E) Lack vascular tissue
20. What is a unisexual flower?
A) A flower that produces only one seed
B) A flower with only male or female reproductive parts
C) A flower with no petals
D) A flower that does not produce nectar
E) A flower with fused sepals
21. What does the pistil consist of?
A) Anther and filament
B) Sepal and petal
C) Stigma, style, and ovary
D) Cotyledon and endosperm
E) Ovule and seed coat
22. Which structure connects the stigma to the ovary?
A) Sepal
B) Filament
C) Style
D) Anther
E) Petal
23. Which of these is not a function of angiosperm seeds?
A) Nourishing the embryo
B) Enabling dispersal
C) Facilitating photosynthesis
D) Protecting the embryo
E) Dormancy survival
24. What is the main difference between complete and incomplete flowers?
A) Color
B) Number of petals
C) Presence or absence of all four floral parts
D) Size
E) Leaf arrangement
25. Which of the following plants is a monocot?
A) Rose
B) Sunflower
C) Corn
D) Oak
E) Tomato
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Answer Key with Explanations
1. C – Only angiosperms produce flowers and fruits.
2. C – Seeds in angiosperms develop inside fruits.
3. D – Flowers are the reproductive structures.
4. C – The ovary becomes the fruit.
5. B – One sperm fertilizes the egg (embryo); another forms the endosperm.
6. C – The ovule contains the female gametophyte.
7. B – The stigma receives pollen.
8. D – The stamen is the male part.
9. A – Angiosperms are classified as monocots or dicots.
10. D – Monocots have flower parts in multiples of 3.
11. E – Dicots show net-like venation in leaves.
12. D – Pollination can be done by animals, wind, or water.
13. B – Petals attract pollinators with color and scent.
14. B – The endosperm nourishes the growing embryo.
15. D – Seeds develop from fertilized ovules.
16. C – Flowers are a major evolutionary innovation in angiosperms.
17. D – Fruits protect and help spread seeds.
18. A – The ovule becomes the seed.
19. C – Angiosperm seeds are enclosed in fruit; gymnosperms are not.
20. B – Unisexual flowers have either male or female parts, not both.
21. C – The pistil includes stigma, style, and ovary.
22. C – The style links the stigma and ovary.
23. C – Seeds don’t perform photosynthesis.
24. C – Complete flowers have all four parts (sepals, petals, stamens, pistil).
25. C – Corn is a monocot; it has parallel veins and one cotyledon.
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