what is the name of the region on duplicated chromosomes where the sister chromatids are most closely attached to each other? this region would be the 'waist' of the chromosome.

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

Adoctor is trying to diagnose a patient with dry skin. which of the following resources would be the most ? a magazine ad about soft skin a growth chart online articles about dry skin medical books

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?