Maandag - Raven
20 important questions on Maandag - Raven
What is the heart stage?
When does the torpede stage of embryo development occur?
During early embroyogenesis, where does cell division take place? And where does the addition of new cells become restricted to when it develops further?
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Where and what are apical meristems?
Where does the shoot apical meristem arise in monocot embryos?
What is the function of the suspensors of angiosperm?
It undergoes apoptosis at the same time as the torpede stage of development. So it is not present in the mature seed.
What is a plumule?
What is the embryonic axis below the cotyledon(s) called if a radicle cannot be distinguished?
What is (the function of) the seed coat?
When do seeds enter the second phase of seed development and what is it called?
What happens during the maturation phase in regards to nutrient flow and storage?
2. During the maturation phase, the seed undergoes desiccation as it loses water (90 percent or more) to the surrounding environment.
3. Seed coat hardens
How does the seed remain viable for long periods of time?
What are the most important external factors that determine the germination of the seed?
2. Oxygen
3. Temperature
(4. Light, for small seeds)
What factors can cause coat-imposed dormancy?
2. rigidity of the seed coat, which prevents the embryonic root from penetrating the coat
3. prevention by the seed coat of the escape of growth inhibitors from the seed
4. the presence in the seed coat of inhibitors that can suppress growth of the embryo
Exhibited by conifers, most cereals, and several eudicots.
What is primary dormancy?
What is second dormancy?
What is the primary root / taproot?
What are lateral roots?
Where does the root system of adult monocot plants form from?
Where is the stored food found in the majority of monocot seeds?
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