Each skeletal muscle is a discrete organ made up of hundreds or thousands of muscle fibers. although muscle fibers predominate, substantial amounts of connective tissue, blood vessels, and nerve fibers are also present. what happens during muscle contraction?

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

Which part of cellular respiration must occur before any of the other steps can occur

Cassandra made a venn diagram to compare and contrast the two stages of cellular respiration. which belongs in the area marked x? energy is released. oxygen is used up. glucose is broken down. carbon dioxide is used up.