Fill in the blank: The inheritance of biological characteristics is determined by individual units called , which are passed from parents to offspring. Where two or more of the gene for a single trait exist, some alleles may be and others may be recessive. In most organisms, each adult has of each gene. These genes from each other when are formed. Alleles for different genes usually segregate of each other.

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explanation:

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

looks like the answer is     c     to me!