Biology Unit 4 - THINGS I KEEP FORGETTING

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Function of the ovaries (generalised)?
Produce oocytes for fertilisation and secrete the hormones oestrogen and progesterone.
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How long is the foetus at the end of the first trimester?
5cm.
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Major events of the 2nd trimester?
The foetus begins to store fat, move and so may open their eyes. They are 30cm long by week 28.
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What are the inter-villous spaces between the chorionic villi of the placenta called?
Lacunae.
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Which part of a blastocyst eventually forms the chorion?
Trophoblast cells.
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How does the placenta provide protection from the mother's immune response?
The walls of the chorionic villi fuse so that immune cells cannot pass into the foetal circulation.
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The amnion is a membrane derived from...
The inner cell mass of a blastocyst.
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Why is outbreeding of evolutionary significance?
Some genomes are more successful than others, so it may allow a species to survive in a changing environment.
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What is it called when a stamen and stigma ripen at different times of the year?
Dichogamy.
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If the stamen ripens first, this is called...
PROTANDRY.
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If the stigma ripens first (rare), this is called...
PROTOGYNY.
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From what structure does the fruit develop?
OVARY (not ovary wall).
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From what structure does the seed develop?
Fertilised ovule.
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Germination
The biochemical and physiological processes through which a seed becomes a photosynthesising plant.
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What process is gibberellin involved in?
Germination in endospermic seeds (brings the seed out of dormancy).
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Other cards in this set

Card 2

Front

How long is the foetus at the end of the first trimester?

Back

5cm.

Card 3

Front

Major events of the 2nd trimester?

Back

Preview of the front of card 3

Card 4

Front

What are the inter-villous spaces between the chorionic villi of the placenta called?

Back

Preview of the front of card 4

Card 5

Front

Which part of a blastocyst eventually forms the chorion?

Back

Preview of the front of card 5
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