Pl asap plz plzz 1. define evolution 2. list the 4 causes of evolution and briefly describe them. 3. what is genetic variation caused by? 4. explain how natural selection leads to evolution. 5. explain a situation in which evolution might occur. 6. draw a graph of each type of natural selection (directional, stabilizing & disruptive). 7. what are homologous structures? why are they important when discussing evolution? 8. describe how these 5 points of evidence support evolution. a. homologues structures b. vestigial structures c. comparative anatomy d. comparative embryology e. dna comparison 9. discuss and give an example of the 4 types of speciation. a. allopatric b. peripatric c. parapatric d. sympatric

1.Evolution is evoling to better fit the enviorment in which the animal or plant live

2. change in enviorment, lack of food, lack of water, lack of recourses

3. it caused by chance

4. Natural selection leads to evoulution like how charles darwin explained when he found those birds on that island

5.evoulution might occur like if a astroid hit the earth 2 billion years ago and the dinasours became extinct alligator's and crocodille's would then adapt to their surrounding and evolve as needed to survive

6. dont know what that is sorry

7.cant help here

8.sorry cant help

9. sorry cant help

the last 4 i really have not learned and i decided not to guess because it would most definitly be wrong but the rest are right goodluck

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.  

what subject is this