WitrynaWhen this happens, the microspore is transformed to an immature, endosporic male gametophyte or pollen grain (Chapter 5). The generative cell divides one time, producing two sperm cells (Figure 6.8A). Pollen grains are shed in either a two- or three-celled condition, depending on whether the generative cell division occurs before or after the ... WitrynaStudy with Quizlet and memorize flashcards containing terms like which of the following contains multiple gymnosperm ovules? a. ovulate cone b. integument c. …
Gametophyte - Wikipedia
WitrynaThere are two types of reproductive organs found in a gametophyte: Archegonium: A multicellular sex organ in the female that creates eggs. It is like an ovary in females … Witryna14 lip 2013 · The developmental plasticity of plants is beautifully illustrated by the competence of the immature male gametophyte to change its developmental fate from pollen to embryo development when exposed to stress treatments in culture. This process, referred to as microspore embryogenesis, is widely exploited in plant … highway act of 1921
32.1: Reproductive Development and Structure - Biology LibreTexts
WitrynaThe male gametophyte phase of the life cycle begins in the microsporangium with meiotic production of tetrads of microspores followed by the division of each haploid microspore into a three-celled pollen grain. Because it is multicellular, the pollen grain is considered to be an immature male gametophyte, but its further development into a ... WitrynaOther articles where microgametophyte is discussed: plant: Heterosporous life histories: …each microspore develops into a microgametophyte (male gametophyte), which … Witryna1 kwi 2024 · So, the pollen is an immature or partially developed male gametophyte. Similarly, the unicellular microspore produces male gametes and develops into … small stair crossword