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Francès / Balade sur le bassin d'Arcachon
Xtec Organización
- 1160 visitas
Le bassin d'Arcachon. L'ostréiculture. Vocabulaire Epurer : littéralement, rendre pur. Ici, simplifier. Un ostréiculteur : personne qui élève les huîtres. Caillé(e) : sans doute laiteuse.…
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Answer. Pollination, fertilisation and the formation of seeds
EduBook Organización
- 3185 visitas
Remember what you have studied in this section and answer the questions: In what two ways can pollen be transferred? What do we call the process where the spermatozoid and ovule meet? What does the…
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True/false. Mosses and ferns
EduBook Organización
- 3097 visitas
Are the following sentences true or false? The difference between mosses and ferns is that the former cannot do photosynthesis. Mosses and ferns are both non-vascular plants. Mosses and ferns are both…
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Pollination, fertilisation and the formation of seeds
EduBook Organización
- 2160 visitas
Pollination Sexual reproduction in plants occurs when a spermatozoid meets an ovule. For this to happen, the pollen grains need to travel from the stamens to the pistil. This process of transferring…
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Analyse. A text
EduBook Organización
- 2141 visitas
Polyembryony Polyembryony is a type of sexual reproduction in which an embryo fragments into several identical embryos. They each develop independently. The young of each litter are of the same sex, as…
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Think and answer. Spermatozoids
EduBook Organización
- 1475 visitas
Look at the diagram on the right. It shows the sexual reproduction of Sargasso seaweed, found in the Atlantic Ocean. Each spermatozoid has two small tails to help it swim to the ovules. What do the…
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