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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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what is only found in plant cells? |
chloroplast, vacuole, cell wall |
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what are the 4 hormones in the menstrual cycle? |
FSH, LH, Oestrogen, Progesterone |
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where is FSH produced and what is it's role? |
Produced in the pituitary gland. causes egg to mature in ovary and and stimulates then to release oestrogen |
mature, ovary |
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where is oestrogen produced and what is it's role? |
Produced in the ovaries. stops FSH production so only one matured egg. repairs, thickens and maintains uterus lining. stimulates pituitary gland to release LH |
stops production of.. uterus lining.. stimulates.. |
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where is LH products and what is it's role? |
Produced in pituitary gland. triggers ovulation - release of mature egg |
triggers.. release of.. |
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where is progesterone produced and what is it's role? |
Produced in the ovaries. maintains lining of uterus during middle part of cycle and pregnancy |
maintains.. |
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Describe the process of IVF |
• give mother FSH & LH to stimulate maturation of several eggs • eggs are collected from mother and fertilised by sperm in a dish • fertiliser eggs develop into embryos • when a group of cells: insert into mothers uterus |
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definition of a fossil |
a preserved remains of a dead organism from million and years ago |
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where are fossils found and what can they be formed from |
• found in rock • formed by hard body parts like bones and shells which don't decay easily • can be preserved in amber, peat bogs and ice |
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how can we use fossils as evidence of evolution? |
• tell age by many layers of rock containing fossils • sim. and diff. between fossils in rock shows how they evolved • can suggest the habitat they were in |
• age • habitat |
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problem with fossil evidence |
• few organisms form fossils • can be damaged by geological activity • often gaps in fossil records |
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Describe how two new species can be formed from ancestral species |
• variation leads to mutation in gene • some have advantages and the fittest survive • species reproduced and evolves over time • species separates and split into different habitats |
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