Determine if the following statements are true or false. T F In pine, the seed-s

Question

Determine if the following statements are true or false. T F In pine, the seed-scale complex consists of an ovuliferous scale and a sterile bract. T F In pine, the generative cell divides to form megaspores. T F In pine, the integuments develop into the seed coat and the ovule develops into the seed. T F In pine, the megaspores are produced in the megasporangium by mitosis before pollination. T F The male cones in pines are woody, perennial and produce pollen in the spring for several years. T F The life cycle of pines is usually completed in one year or less. T F All seed plants are heterosporous. T F The conifers, gnetophytes, cycads, and Ginkgo all have free-swimming sperm. T F In pines pollen is carried from the microsporangiate cone to the ovulate cone by insects. T F The nucellus is a type of megasporangium.

Explanation / Answer

Answer:

10. a. True.

Longitudinal section of an ovulate of Pine cone possess the seed-scale complex, consisting of the ovuliferous scale and a sterile bract. The ovule contains a single megasporocyte (megaspore mother cell) surrounded by the nucellus/megasporagium and an integument. The sterile bract can be considered to be morphologically equivalent to a leaf.

b. False

In pine, the generative cell of the four celled microgametophyte undergoes division to give rise to a sterile cell and a spermatogenous cell.

c. True

In pine, the integuments develops into the seed coat while the ovule becomes the seed.

d. False

The megaspores are produced within megasporangium using meiosis.

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