| 释义 |
Definition of megaspore in English: megasporenoun ˈmɛɡəspɔːˈmeɡəˌspôr Botany The larger of the two kinds of spores produced by some ferns. Compare with microspore Example sentencesExamples - Both of these genera are heterosporous, meaning that each species produces two distinctly different types of spores: microspores and megaspores.
- Microfossil assemblages from rare black and grey clays in this succession contain only a variety of seeds, Microcarpolithes hexagonalis and megaspores, and there are neither foraminifera nor other marine microfossils.
- Meiosis results in the production of four megaspores, containing half the number of chromosomes of the sporophyte.
- They have male spores called microspores and female spores called megaspores.
- Their heterosporous life cycle (including both megaspores and microspores) is likely to be an adaptation to their aquatic habit.
Definition of megaspore in US English: megasporenounˈmeɡəˌspôr Botany The larger of the two kinds of spores produced by some ferns. Compare with microspore Example sentencesExamples - Meiosis results in the production of four megaspores, containing half the number of chromosomes of the sporophyte.
- Microfossil assemblages from rare black and grey clays in this succession contain only a variety of seeds, Microcarpolithes hexagonalis and megaspores, and there are neither foraminifera nor other marine microfossils.
- Both of these genera are heterosporous, meaning that each species produces two distinctly different types of spores: microspores and megaspores.
- Their heterosporous life cycle (including both megaspores and microspores) is likely to be an adaptation to their aquatic habit.
- They have male spores called microspores and female spores called megaspores.
|