Reproduction In Plant Flashcards
Advantages of asexual reproduction
Population can increase rapidly
Can exploit a suitable habitat quickly
Disadvantage of asexual reproduction
Doesn’t lead to variation in a population
The species may only be suited to one habitat
Less resistance to disease
Advantages of sexual reproduction
1.Introduce variation into a population
2.species can adapt to new environment
3.a disease is less likely to affect all the the inviduals in a population
Disadvantage of sexual reproduction
Slow at it is needs two parents
Difference between asexual and sexual reproduction
Asexual need 1 parent, offspring produced are genetically indentical,but sexual need 2 parents and genetically different to the parents
Stigma
Top of female part of plant of flower (collect pollen grain)
Stamen
Male part of the flower comprising an anther attach to filament
Sepals
Protect unopen flower
Role of Ovary
Produce female sex cells
Anther
Produce male sex cells (pollen)
What is meant by pollination
The transfer of pollen from the anther of the flower to the stigma of the same flower or of another flower
What is meant by fertilization
It is the fusion of the nucleus of the male gamete and the nucleus of female gamete to form zygote
Fertillazation stages
1.pollen land on stigma and grows a pollen tube
2.pollen tube grows down style and reaches the ovary
3.pollen tube enter the ovule through micropyle
4.male nucleus fuese with the nucleus of ova to form a zygote
5.ovule turn into a seed and ovuary become fruit
What is germination
Process controlled by enzymes in which the seed begins to devolp into a new young plant
What is factors affect germination process and explain
Water where all chemical reactions take place
Oxygen for aerobic respiration
Warmth increase growth rate and enzyme activity
