Which of the following statements about agricultural production in Africa is false? A. Agricultural production has increased slightly since 1960. B. Population is increasing, so the demand for food is also increasing. C. Soil fertility is decreasing. D. Little investment has been made in mechanization in the region. Please select the best answer from the choices provided. A B C D

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

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