Download Natural Selection and Variation

Natural Selection and Variation
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Across
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2. Reproductive isolation is a form of ______ isolation.
1. The name given to mutations that cause death
4. Lamarck proposed that ______ characteristics were
inherited.
3. Struggle for ______.
5. This type of mutation will not be passed on to offspring.
7. Another name for geographical isolation is ______
speciation.
6. This causes variation. It can be harmful, beneficial or
neutral.
9. This type of mutation is the only type that will contribute
to large scale evolution (_____ - _____).
8. Darwin and Alfred ______ proposed similar theories
10. A species is defined as a group of interbreeding
populations that are ______ isolated from other groups.
11. This isolation occurs when a population becomes
divided by a physical barrier such as water, mountains,
desert, etc.
12. Charles ______ first proposed natural selection.
13. Survival of the ______.
14. Another name for reproductive isolation is ______
speciation.
14. Genetic ______ brings together new combinations of
genes
15. This type of natural selection occurs when the
environment changes.
17. This type of natural selection occurs when selective
pressures favour the two extremes of a characteristic.
16. What animal is used to explain Lamarck’s theory?
19. The development of a new species.
18. This type of natural selection occurs when the
environment does not change.
21. Variation is the differences in ______ of genes.
20. One of Darwin’s four observations states that more
offspring are produced than survive to ______.
22. One of Darwin’s four observations stated that
characteristics are ______.
24. ______ Selection.
23. Gene _____ is the movement of genes from one
population to another.
26. One of Darwin’s four observations detailed that
individuals within a species differ from each other.
25. One of Darwin’s four observations states that
populations are fairly ______ in size.
27. Book title – 'On the Origin of ______ by means of
natural selection, or the preservation of favoured races in
the struggle for life'.