15 1 Darwin's Theory of Natural Selection 15.1 Darwin s Theory of ...
15 1 Darwin's Theory of Natural Selection 15.1 Darwin s Theory of ...
15 1 Darwin's Theory of Natural Selection 15.1 Darwin s Theory of ...
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<strong>15</strong>.11 <strong>Darwin</strong>’s <strong>Theory</strong> <strong>of</strong> <strong>Natural</strong> <strong>Selection</strong><br />
Voyage <strong>of</strong> HMS Beagle by Charles <strong>Darwin</strong><br />
1. 5 year voyage around the world<br />
2. Visited many continents and islands<br />
3. Made numerous observations and<br />
collected many specimens
<strong>15</strong>.1 <strong>Darwin</strong>’s <strong>Theory</strong> <strong>of</strong> <strong>Natural</strong> <strong>Selection</strong><br />
Galapagos Islands<br />
1. Close together th but very<br />
different climates<br />
2. Different islands had their<br />
own slightly different<br />
varieties <strong>of</strong> animals<br />
– Different birds and tortoises<br />
depending on island
<strong>15</strong>.1 <strong>Darwin</strong>’s <strong>Theory</strong> <strong>of</strong> <strong>Natural</strong> <strong>Selection</strong><br />
<strong>Darwin</strong> - <strong>Natural</strong> <strong>Selection</strong><br />
1. Saw humans using artificial selection<br />
– pick certain traits to pass on to<br />
<strong>of</strong>fspring<br />
2. <strong>Darwin</strong> thought this could<br />
happen in nature<br />
a. Less equipped people would<br />
not survive<br />
b. Fitness – ability to survive and<br />
reproduce
<strong>15</strong>.1 <strong>Darwin</strong>’s <strong>Theory</strong> <strong>of</strong> <strong>Natural</strong> <strong>Selection</strong><br />
3. <strong>Theory</strong> <strong>of</strong> <strong>Natural</strong> <strong>Selection</strong><br />
a. Traits <strong>of</strong> a population could change<br />
over time – mechanism for<br />
evolution<br />
b. 4 principles <strong>of</strong> natural selection<br />
1. Individuals id show differences<br />
2. Variations can be inherited<br />
3. Organisms Oga shave more oe<strong>of</strong>fspring<br />
that can survive<br />
4. Variations that increase<br />
reproductive success will have a<br />
greater chance <strong>of</strong> being passed<br />
on<br />
4. The Origin i <strong>of</strong> Species – book by <strong>Darwin</strong>;<br />
used term evolution at end – biologists<br />
use term for change through time
<strong>15</strong>.1 <strong>Darwin</strong>’s <strong>Theory</strong> <strong>of</strong> <strong>Natural</strong> <strong>Selection</strong><br />
<strong>15</strong>.1 Main Idea Questions<br />
1. Which moth has more fitness<br />
a. Dark moth<br />
b. Light moth<br />
2. Which finch would be better<br />
suited for an area that has many<br />
large nuts<br />
a. A<br />
b. B<br />
c. C<br />
D<br />
d. D<br />
A<br />
B<br />
C
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