Natural Selection

Question 1

Natural Selection

Answer 1

theory of the mechanism of evolution, how and why life changes.

Question 2

How and why life changes

Answer 2

Some organisms w/in a population have traits that allow them to survive better and reproduce better. These traits are likely to be passed on and increase in frequency.

Question 3

5 Darwin Observations Lead to Natural Selection

Answer 3

1. Organisms have the ability to reproduce at a rate that would allow them to grow exponentially
2. Populations generally remain stable over time
3. Resources are limited
4. Individuals in a population vary in their characteristics
5. Much of that variation is heritable

Question 4

3 Principles of Natural Selection

Answer 4

1. With more individuals than an environment can support a struggle for survival takes place between individuals in a population
   active struggle
   e.g fighting over territory
   passive struggle
   e.g plants finding soil purchase and growing faster than others
   e.g. avoiding predation

Question 5

Outcome of struggle…

Answer 5

is not random.
Individuals with better adapted traits will survive more and be more likely to reproduce.
3. Unequal survival and reproduction leads to a gradual accumulation of favorable characteristics.

Question 6

Where does Natural Selection Occur?

Answer 6

The population level. Ecosystem level involves procurement for physical resources (H2O, air,soil)