Thursday January 26, 2012

First In Class we showed our homework (pgs. 19-20)
****By The Way We should know the differences between Darwin and Lamarck****

We took notes and here is what we learned:




We learned about Comparative Embryology, which is taking an embryo that is developing from one species and see the similarities between it and the other embryo from a different species. This is a compare and contrast.


-Humans have gill pouches when developing, which becomes part of our throats and ears



~During these stages many species like fish, frogs, snakes, birds, apes, and humans look more ALIKE than different~








We also learned about Molecular Biology, which is taking the genetic code, such as the DNA or the RNA , or amino acids that are created from one species and compare it to another. This demonstrates the close relationship between two species and proves that they descend from a common ancestor.




-Humans and apes are very close and that the DAN of humans and apes are so similar that only 2% of the whole DNA sequence are different.





~This is another way to prove that certain species are related to another species by comparing their DNA~






DARWIN REVIEW

1st is Overproduction, which means that ALL species have an excessive amount of offspring.

With so many animals fighting over one source of food, this causes competition (Olympics for animals except it is for their survival and is not always consistent with a set time)

This means certain animals lose, and other animals win. Unfortunately, the animals that lose die. But, for the animals that won they get to survive and pass on their traits that allowed them to win. These traits give them the advantage allowing their offspring to survive too.

This is what "Survival of the Fittest" means


















2nd is Individual Variation, means that the parents give the offspring traits that other parents my not have.

This allows variation to occur (diversity) and is the main reason why that certain animals look different than others, even though they have the same common ancestor.




3rd is the Differential Reproductive, which means nature becomes the force that changes species

This is what natural selection is where the environment decides who is fit to survive and reproduce, and who is to die.

*KNOW THIS DEFINITION FOR THE TEST----
Adaptive Evolution is when favored traits accumulate in population over generations

We also went over examples of natural selection like the finches and how the finches on the Galapagos Islands have the same common ancestor as finches on the South American mainland.

For biology, we need to bring a CALCULATOR that can SQUARE NUMBERS and use a RADICAL SIGN (doesn't have to be fancy.)

HOMEWORK:
FINISH UP pg. 25-28

FINISH UP pg. 5 due Monday

FINISH UP pg. 13-16 due Monday

Thank You, Dustin

Next up is: ***Helen