A pine tree is called a sporophyte because it?

Question

a. develops from a germinated spore.

b. produces spores by meiosis.

c. is haploid.

d. undergoes fertilization.

e. reproduces by both sexual and asexual means.

Answer 1

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Answer 2

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"Does this mean that there are different types of sporophytes/gametophytes (a gymnosperm type and an angiosperm type)?" Yes, all plants go through life cycles with an alternation of generations. What the various plant phyla differ by is how long they spend in each stage of the cycle. Sporophytes => spores Spores grow into gametophytes Gametophytes => male & female gametes Gametes merge into a zygote Zygotes grow into sporophytes. Moss are dominated by the gametophte stage so a typical moss image will be of the green mat of the gametophyte with small stalks rising up. The sporophyte stands above the moss as a long stalk and a capsule that looks like a salt shaker at the tip. Inside the capsule are the spores. In ferns the sporophyte is the dominant life stage with fronds rising from a basal crown at ground level. Ferns produce dotted clusters of sporangia on the underside of some leaves, that produce spores. The sporangia cluster is called a sorus and looks like a brown dot when you reverse the leaf. The small, heart-shaped gametophyte (prothallus) grows from the spore & anchors itself before producing the gametes. Horsetails are considered fern allies so are pteridophytes. With gymnosperm and angiosperm the gametophyte life stage is reduced. It is the cones and the flowers that bear the miniaturized gametophyte stage while attached to the parent sporophyte plant. The plants we see as trees, grass and herbs are the sporophytes but they do not release spores. Instead they release pollen. The grain of pollen is the whole male gametophyte. The pollen disperses, to find the female gametophyte, still in a cone or flower, and fertilize its ova making a seed. The seed then is an immature sporophyte. Gymnosperm Example: Sporophyte- fir tree or pine or spruce or larch or hemlock etc Gametophyte- both a male (usually smaller) & a female cone Angiosperm Example: Sporophyte- apple tree, rose bush, lily etc Gametophyte- the flower with the male stamen holding pollen on the anther and the female pistil with an ova in the ovary

Answer 3

a

Answer 4

B. produces spores by meiosis