Question

Sketch the lifecycle of a bryophyte (alternation of generations). Place the following labels on the sketch: sporophyte, gametophyte, gametes, spores, mitosis, meiosis, diploid, haploid, fertilization, zygote.

Sporophytes are attached to which sex gametophyte? _______________________

Are spores haploid or diploid? ______________________

Which life form, gametophyte or sporophyte, undergoes meiosis? ______________________

In mosses (and all bryophytes), which is the dominant life form, sporophyte or gametophyte? ____________________

A) Is the gametophyte of the fern directly protected by the sporophyte?
B) Where could you find a fern gametophyte?

What is pollen?

Describe the leaf shape and quality compared to other plant specimens.

What advantage is directly related to a plant being an “evergreen”?

State at least 2 key adaptations that allowed gymnosperms, especially conifers, enhanced survival in dry/arid conditions.

Observe a scale from a female cone if available. Sketch and label what you see.

What is a “pine nut”?

A conifer seed will be found on which type of cone? Why?

Answer 1

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1.Sporophyte is attached to which sex gametophyte

Ans- The male and female gametes are fused together to form a zygote which develops into a new sporophyte by cell division. The sporophytes attached to and dependent on the female gametophyte.

2. Are spores haploid or diploid?

Ans- Spores are haploid in nature.

3. Which life form, gametophyte or sporophyte, undergoes meiosis?

Ans- Sporophyte (diploid ) undergoes meiosis to produces spores.

4. In mosses and all bryophytes, which is the dominant life form, sporophyte or gametophyte?

Ans- In mosses or all bryophytes, the dominant generation is haploid in nature, so the gametophyte is the dominant life form.