An invalid study may have all of the following problems except a. poorly designed test questions b. insufficient data c. variables that relate to the topic d. interference of unrecognized variables

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses

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Asegment of dna that codes for rna and a protein is a