Genes are segments of dna that determine the phenotype of an individual. pea colors can be yellow or green. when two plants that produce yellow peas were crossed, the offspring produced green peas. this is because the parents were for pea color. because there are only two options for pea color, the plants’ pea color is a case of
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Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.