1.
Table: Adaptations of Gymnosperms for Living on Land
| Aspect | Adaptation for Living on Land |
|--------|-------------------------------|
| Alternation of Generation | Dominant sporophyte generation; gametophytes are reduced and dependent on the sporophyte, allowing for better survival on land. |
| Needles | Reduced surface area minimizes water loss through transpiration; thick cuticle and sunken stomata further reduce water loss. |
| Seeds | Seeds protect the embryo from desiccation and environmental stress; they provide a means of dispersal and dormancy. |
| Pollen | Pollen grains allow for fertilization without water, enabling reproduction in dry environments. |
| Vascular Tissue | Xylem and phloem transport water, nutrients, and sugars efficiently, supporting growth and survival on land. |
2.
Two Important Uses of Gymnosperms:
- Timber for construction and furniture.
- Production of paper pulp.
3.
The seed of a gymnosperm is made in the _________.
- The seed of a gymnosperm is made in the
ovule.
4.
Comparison of Reproductive Structures: Gymnosperms vs. Angiosperms
Gymnosperms:
- Seeds are exposed on the surface of cones (not enclosed in a fruit).
- Pollen is carried by wind to the ovule.
- No flowers; reproductive structures are cones.
Angiosperms:
- Seeds are enclosed within a fruit.
- Pollen is often carried by animals (e.g., bees) or wind.
- Reproductive structures are flowers.
Common Features:
- Both produce seeds.
- Both have a dominant sporophyte generation.
- Both use pollen for fertilization.
- Both have vascular tissue.
Parent Tip: Review the logic above to help your child master the concept of angiosperm and gymnosperm worksheet.
