Rivers are the geographic feature that gave rise to early civilization. The earliest urban foundations were made someplace in the scope of 4000 and 3000 B.C.E. when the rising of agribusiness and trade allowed people to have surplus food and financial security.
Since many people no longer needed to farm for food, a wide range of occupations and interests could flourish in a small area. Mesopotamia, Egypt, the Indus Valley, and China are the four oldest civilizations because they provided the foundation for ongoing cultural development.
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(B) Cnidaria
(C) Platyhelminthes
(D) Arthropoda
(E) Chordata
A- populations change over time in response to changes in the environment
B- that all species are clones
C- populations never change
D- individuals have the same genes
Answer choices:
A. x + y = 23, 3x + 2y = 55
B. x + y = 55, 3x + 2y = 23
C. x + y = 23, 2x + 3y = 55
D. x + y = 55, 2x + 3y = 23
the answer to this question is c
a. Yes, because natural selection has affected the frequency of the two different forms.
b. Yes, because they have completely different coloration.
c. Yes, because they are reproductively isolated based on habitat.
d. Yes, because they have completely different coloration and natural selection has affected the frequency of the two different forms. e. No.
up the chemical process of breaking down food molecules.Answer:
Amylase is a catalyst that speeds up that speeds
Explanation: