HAPPY WEDNESDAY Bellwork Write down only the bolded red portion and your answer Two species of mice live in a field in the middle of East Texas One mouse species is WHITE with BLACK spotting ID: 909078
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Slide1
Bell Work 1/5
Take out yesterdays worksheet and answer the summary and fill out the 3 questions you still have about evolution
Slide2 HAPPY WEDNESDAY
Bellwork
:
Write down only the
bolded red
portion and your
answer
.
Two species of mice live in a field in the middle of East Texas. One mouse species is
WHITE with BLACK spotting.
The other is
BROWN with WHITE spotting.
After a year, the population of
white mice
has dramatically
decreased
, while the population of the
brown mice
has
slightly increased
.
Why would this be happening?
Slide3CHAMPS
C
-Conversation
H
-Help
A
-Activity
M
-Movement
P
-Participation
Slide4Instruction
C
-No Talking
H
-Raise your hand
A
-Take Notes
M
-Stay in your seat
P
-Take Notes
Slide5Set up your page for today’s notes…
Page:
49
Date:
1-5-16
Title:
Natural Selection
Essential Question:
How is natural selection related to adaptation and diversity?
Yes, this is Cornell Notes!!
Slide6What is evolution?
Slide7Evolution
: change in heritable traits of a population over time (generations)
Slide8Charles Darwin
:
contributed more to our understanding of evolution than anyone else
Slide9What can affect evolution?
Slide10Population Size
: limited by environmental factors such as
Food
Shelter
Water
Predators
Disease
Pollution
Slide11BELL WORK (Buff Binder)
:
Open your journal to yesterday’s notes.
Based on what you’ve written so far,
try to answer the following question
:
How does diversity affect evolution?
Slide12Slide13Fitness
:
the ability of an organism to survive and reproduce; results from adaptations
Slide14Adaptation
:
inherited characteristic that increases an organism’s chance of survival
Slide15Successful adaptations will:
- make organisms better suited to their environment
- increase
fitness
Humans have thousands of adaptations: large brain, opposable thumbs, excellent sensory organs, light, strong skeleton, etc.
Slide16What is the primary mechanism of evolution?
Slide17Natural selection
:
individuals with characteristics not well suited to their environment will either die or leave few offspring
*
Also called “survival of the fittest”
*
Observed as changes in a population over time, NOT individual organisms!
Slide181. A
population of giraffes inhabits an area filled with
tall trees
and
vegetation that is located high off of the ground
. Within the population of giraffes are individuals with short, medium, and long necks.
Which of the
individuals
will leave behind the most offspring?
Long necks – they will be able to reach the food better than the others, and will therefore survive longer & leave more offspring
Slide192. Complete the following sentence with the correct answer choice.
Natural selection happens
(quickly/slowly)
and occurs in
(individuals/populations).
Slide203. A
brand of fire ant poison claims to kill all ants in two applications. The first application of the poison killed 74% of the fire ants. Three months later, the poison was reapplied but only killed 39% of the remaining fire ant population.
Explain
the decrease in the effectiveness of the ant
poison.
The remaining ants were resistant to the poison.
What genes will these remaining ants pass to their offspring?
Slide214.
Imagine that a small island holds a population of lizards that are all the same (have the same traits). Now imagine a strong storm sweeps some of the island lizards over to the mainland. On the mainland, there are
new ecosystems
for the island lizards to explore. In these new ecosystems, they meet new populations of lizards (with new traits) that they can now breed with.
What might happen with regards to the
variation
that could be created within the population of island lizards
?
(more change, less change, no change)
5.
In Madagascar scientists have discovered a moth,
Xanthopan
morganii
praedicta
, which has a
30.5 cm
long proboscis and feeds from and pollinates Darwin’s orchid,
Angraecum
sesquipedale
. The orchid has a nectar-producing tube that is
27.9 cm
long.
How is the moth’s proboscis size an adaptation for its environment?
The moth has very little competition for its food.
Slide23Bunny Simulation
Slide24QUICKWRITE
Answer the essential question (How is natural selection related to adaptation and diversity?)