Answer:
evolution is change over a period of time
Answer:
1. B - Aa x Aa = 25% chance AA, which is the only genotype that results in sickle-cell. Aa is called "sickle-cell trait'; it isn't the full disease.
2. A - Aa x aa = we know will produce no homozygous dominant
3. B - RR x Rr = 1/2 chance of Rr (same problem as #5)
4. A - Bb x Bb = 1:2:1 ratio
5. B - WW x Ww = 1/2 chance of Ww
6. D - AABbCC has 5 dominant alleles, which is the most out of the four options
7. C - the one with the fewest dominant alleles will be the most green and the most successful in the environment
The best answer would be the first statement. The first sentence which is 'water pollution causes a decrease in fish populations in a river.' illustrates how human <span>activities can most directly change the dynamic equilibrium of an ecosystem.</span>
Cirrus clouds
They are the highest clouds and are composed entirely of ice crystals. The ice crystals evaporate high above the earths surface