WebExplain when seed plants first appeared and when gymnosperms became the dominant plant group; Describe the two major innovations that allowed seed plants to reproduce … WebDescribe the male gametophyte of a seed plant. Describe the female gametophyte of a seed plant. Expert Answer 100% (8 ratings) 1. Flowering plants also known as …

Plant sexual reproduction: perhaps the current plant two-sex …

WebMicrospores Female Gametophyte 3) (1 point) In conifers, the nutritive tissue for the developing embryo is the: ___ Haploid body cells of the female gametophyte. 4) (1 point) About how many months does the complete life cycle of a pine typically take? ___ _About 2-3 years_____. 5) (4 points) Describe two changes to the seed plant life cycle that … WebIn seed plants, the gametophyte that produces an egg; in flowering plants, an embryo sac. sometimes called megagametophyte. Sperm. male gamete. Micopyle. a pore in the … builders lymington

Gymnosperms and Angiosperms - Tulane University

WebThe pollen grains are the male gametophytes, which contain the sperm (gametes) of the plant. The small haploid (1 n) cells are encased in a protective coat that prevents desiccation (drying out) and mechanical damage. Pollen grains can travel far from their original sporophyte, spreading the plant’s genes. WebThe development of male and female gametophytes of seed plants (spermatophytes) takes place in micro- and megasporangia formed on modified leaves (sporophylls) in cones or in flowers. In contrast to most free-sporing plants, immature microgametophytes of seed plants are dispersed as desiccation-tolerant pollen. Webgametophyte, in plants and certain algae, the sexual phase (or an individual representing the phase) in the alternation of generations—a … builders lunch box