Periodophytes and gymnosperms
chave haplo - diplontic life
Cycle explain
Answers
Answer:
Generally secondary growth is absent in pteridophytes, while it is present in gymnosperms. ... Male gametes are ciliate in pteridophytes, while they are not in gymnosperms (except for few like cycas). 12. Gymnosperms are seed plants (spermatophytes), while there is no seed in pteridophytes.
2.
Haplo-diplontic type of life cycle involves the clear alternation of generations between a haploid gamete producing gametophyte and a diploid spore-producing sporophyte. Both bryophytes and pteridophytes exhibit this kind of life cycle pattern.haplontic life cycle — the haploid stage is multicellular and the diploid stage is a single cell, meiosis is "zygotic".
A life cycle is defined as the developmental stages that occur during an organism's lifetime. In general, the life cycles of plants and animals have three basic stages including a fertilized egg or seed, immature juvenile, and adult. ... The time it takes for an organism to complete its life cycle is called a life span.All parasites have a life cycle that involves a period of time spent in a host organism and that can be divided into phases of growth, reproduction, and transmission. Life cycles of parasites can be further divided into two categories: direct (monoxenous) and indirect (heteroxenous).