What determines the texture of soil?
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a. the amount of air and water in it
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b. the amount of organic humus present
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c. the amount of dark- versus light-colored rock
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d. the relative amounts of sand, silt, and clay

The cluster of developing cells from conception until birth is called an

A(n) is a molecule influences the way that a molecule reacts.

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.