In the blood clotting cascade mechanism, which specific enzyme catalyzes the conversion of fibrinogen to fibrin

What is the name of the two satelites on mars

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

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f