3a (Reproduction) Flashcards
1
Q
Sexual reproduction
A
- The fussion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo
- Genetic variation
2
Q
Asexual reproduction
A
- Reproduction with one parent
- No genetic variation
3
Q
Insect pollinated flower
A
- Colourful petals (to attract insects)
- Sticky polen (to stick insects bodies)
- Large petals (to attract insects)
- Nectar (to attract insects, they feed)
4
Q
wind pollinated flower
A
- Not colourful petals, usually green
- Small, light grain pollen (to be carried by the wind)
- Small petals (needs to be light)
5
Q
Seed / fruit formation
A
- Pollen lands on stigma
- Pollen tube is formed and fertilises ovule in ovary
- Seed / fruit is formed
6
Q
Gamete
A
Sex cell
7
Q
Zygote
A
Fertilised egg
8
Q
Mitosis
A
Regular cell division
9
Q
meiosis
A
cell division to form gametes
10
Q
Plants asexual reproduction
A
Natural –> Runners
Artificial –> Cuttings
11
Q
Role of oestrogen in menstrual cycle
A
Responsible fro re-growth of uterus lining
12
Q
Role of progesterone in menstrual cycle
A
Keeps the uterus lining in place
13
Q
Placenta
A
- Allows the embryo to obtain materials suhc as oxygen and nutrients from the mothers blood
- Allows the emrbyo to get rid of waste products such as carbon dioxide and urea
14
Q
Amniotic fluid
A
Amniotic fluid surrounds and protects the embryo from physical damage
15
Q
uterus
A
Where the embryo becomes attached through the placenta
