What is an ovule in gymnosperms?

gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule—unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally, “naked seeds”) are borne in cones and are not visible until maturity.

What is the alternation of generation in gymnosperms?

The life cycle of a gymnosperm involves alternation of generations, with a dominant sporophyte in which the female gametophyte resides, and reduced gametophytes. All gymnosperms are heterosporous.

Are ovules found in gymnosperms?

In gymnosperms (conifers and allies) the ovules lie uncovered on the scales of the cone. In angiosperms (flowering plants), one or more ovules are enclosed by the ovary, which develops into the fruit.

What are the general characteristics of gymnosperm?

Following are the important characteristics of gymnosperms:

  • They do not produce flowers.
  • Seeds are not formed inside a fruit.
  • They are found in colder regions where snowfall occurs.
  • They develop needle-like leaves.
  • They are perennial or woody, forming trees or bushes.

What is the other name of ovule?

In this page you can discover 16 synonyms, antonyms, idiomatic expressions, and related words for ovule, like: seed, egg, embryo, flower gametophyte megasporogenesis pollination, nucellus, amphitropous, anatropous, campylotropous, orthotropous, egg-cell and anther.

Where are ovules borne in gymnosperms?

In gymnosperms such as conifers, ovules are borne on the surface of an ovuliferous (ovule-bearing) scale, usually within an ovulate cone (also called megastrobilus). In the early extinct seed ferns, ovules were borne on the surface of leaves.

How is the alternation of generations different in gymnosperms and angiosperms?

Gymnosperm reproduction differs from that of angiosperms in several ways (Figure 1). In angiosperms, the female gametophyte exists in an enclosed structure—the ovule—which is within the ovary; in gymnosperms, the female gametophyte is present on exposed bracts of the female cone.

Which is not a characteristic of a gymnosperm *?

Naked seed plants Was this answer helpful?

Which of the following feature is related to gymnosperms?

Gymnosperms are heterosporous, i.e., they produce haploid microspores and megaspores. The microspore develops into male gametophyte, called pollen grain, development of pollen grains takes place in microsporangia present on microsporophyll.

What is nucellus in gymnosperms?

The nucellus in the gymnosperm is made up of a mass of diploid cells and is contained in the ovule. One of its cells, the microsporocyte, produces 4 megaspores by meiosis. The endospermic cells will, therefore, have 32 chromosomes as it is haploid.

Which type of fertilization is found in gymnosperms?

Porogamous
So, the correct answer is ‘Porogamous’