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21 Cards in this Set
- Front
- Back
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Speed (velocity) in units and symbol |
Metres per second m/s |
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Acceleration in units and symbol |
Metres per second per second m/s2 (squared) |
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Force in units and symbol |
Newtons N |
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Force = |
mass x acceleration (F=ma) |
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What is a mutation? |
When a DNA gene is damaged or changed in a way that alters the genetic message carried by that gene. |
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What is paleontology? |
The study of history of life on earth using fossils |
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Acceleration = |
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What is the history of the theory of evolution? |
Charles Darwin is given credit for the theory as he was the first to propose a mechanism that explains the process of change. |
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What are 3 forms of evidence of evolution? |
- fossils - anatomy - molecular biology |
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What are the conditions needed for fossils to form? |
Combination of pressure, chemical reactions and time turn sediments into mineralised fossils as displaced minerals the spaces in the buried bones. |
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What is natural selection? |
The process where organisms best suited to their environment survive while the ones who aren’t do not. |
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Artificial selection |
The intentional reproduction of organisms with the most desired trait. (Eg, cabbage with the most leaves) |
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Speed = |
Distance/time v = d/t |
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Another word for speed is ..... |
Velocity |
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Acceleration = |
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Name Newton’s laws + explain |
1. Inertia - objects in motion stay in motion and objects at rest stay at rest unless acted upon by an unbalanced force.
2. Acceleration - force equals mass times acceleration
3. Reaction - for every action there is an equal and opposite reaction. |
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Define MITOSIS |
single cell divides into two identical daughter cells. |
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Define MEIOSIS |
process where sex cells have half the number of chromosomes |
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The four bases that make up DNA are |
Adenine, guanine, thymine, cytosine |
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Which bases bond together? |
A+T G+C |
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Who is Gregor Mendel? |
He discovered the laws of inheritance due to his work on pea plants. He tracked parents genes and the appearance they had on offspring as dominant or recessive genes. |
