Gymnosperms

Question 1

Gymnosperms

They are commonly known as … (because their …)
Common examples:

They have a …. plant body: …, … & …
Their … have a … cuticle
They have vascular tissues with … (…) system
They are usually …-pollinated
They bear … seeds (i.e the seeds are …)

Answer 1

Gymnosperms

They are commonly known as Conifers(because their seeds are formed in male and female cones)

Common examples: Cycas, Pinus, Ephedra, etc.

They have a well-differentiated plant body: Root, Stem & Leaves
Their leaves have a thick wavy cuticle
They have vascular tissues with complex vascular (transport) system
They are usually wind-pollinated
They bear naked seeds (i.e the seeds are not enclosed within a fruit)

Question 2

Characteristics Of Angiosperms

1. They are the … plants
2. They have a … cuticle …
3. They possess … and … (they are known as ….)
4. Their … is …. of water.
5. The seeds produced are …. within the ….
6. They are seed bearing … plants with …, … and ….
7. They make up majority of all … on Earth and can be found in all types of environments.

Answer 2

Characteristics Of Angiosperms

1. They are the most advanced plants
2. They have a varying cuticle thickness
3. They possess flowers and fruits (they are known as Flowering Plants)
4. Their reproduction is independent of water.
5. The seeds produced are enclosed within the fruit.
6. They are seed bearing vascular plants with true stems, leaves and roots
7. They make up majority of all the plants on Earth and can be found in all types of environments.

Question 3

Economic Importance Gymnosperms

They are major … of …, …., … and …
They are used as …
They are major … of …
They are used as … (….)
Source of …
… plants are widely used as …

Answer 3

They are major sources of lumber, paper pulp, resins and turpentine
They are used as fuel
They are major source of world’s timber
They are used as medicines (Ginkgos)
Source of food
Gymnospermous plants are widely used as ornamentals

Question 4

Ecological Importance Of Gymnosperms

1. Provide … and … for …
2. … prevent ….
3. Reduce ….
4. … are often featured in …
5. … are … shrubs.
6. … are effective …

Answer 4

1. Provide food and habitat for wild life
2. Forests prevent soil erosion.
3. Reduce green house gases.
4. Conifers are often featured in gardens.
5. Junipers are low-growing shrubs.
6. Conifers are effective wind breakers.

Question 5

Life Cycle Of Gymnosperms

The gymnosperm(pine tree) life cycle takes about …
Exhibits ….
The dominant photosynthetic part of the life cycle is the ….
Sporophyte is …..
Gametophyte(…) is dependent on ….
Cones are …. structures (….)
Pollen grains are produced by … and carried to … by … where …. occurs.
After fertilization, a …. is formed which is … in a …
It …. to produce a …. plant once again.

Answer 5

The gymnosperm(pine tree) life cycle takes about 2 years
Exhibits alternation of generation
The dominant photosynthetic part of the life cycle is the sporophyte.
Sporophyte is diploid
Gametophyte(n) is dependent on sporophyte
Cones are reproductive structures (Gametophytes)
Pollen grains are produced by male cones and carried to female cone by wind where fertilization occurs.
After fertilization, a sporophyte is formed which is enclosed in a seed. It germinates to produce a sporophytic plant once again.