Question

1. Conifers are gymnosperms. What does this mean?

2. How do the leaves of Ginkgo differ from the conifer’s leaves?

3. In a botanical sense, what is a pollen grain?

4. The development of a seed represents another major step in the evolution of plants. What is an advantage of having seeds?

5. In conifers that have both male and female cones in the same tree, often the female cones are produced in the upper portion of the tree while the male cones, on the bottom. What are two advantages of this arrangement of cones on the tree?

6. Conifers are normally called softwood while angiosperms are called hardwood. What are the characteristics in the xylem that make this difference?

Answer 1

1.Conifers are non flowering plants.Conifers are considered to be gymnosperms why because their reproductive structures are cones unlike flowers and fruits of flowering plants.

Conifers are gymnosperms why because their ovules or seeds are not enclosed in an ovary.This type of seeds are called as naked seeds.

2. The Ginkgo leaves are fan shaped leaves.They are flat and irregulary notched.They have unique veins system

Most conifers have needle-like leaves.Needles have lower wind resistance than flat,big leaves like Ginkgo.

3.In a botanical science pollen grain is a male reproductive structure.Itself is diploid.It contains male gametes.

Every pollen grain is a minute body of varying shape and structure.