Which crustal features form at convergent boundaries? A. Mid-ocean ridges, rift valleys, and faults
B. Mountains, volcanoes, and mountain ranges
C. Mid-ocean ridges, volcanoes, and faults
D. Mountains, rift valleys, and faults

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

the answer is cell division : )

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.

answercells,tissues,organs,organ,system-organism;

levels of biological organization; organism,population,community,ecosystem,biome,biosphere,

hope this .good luck