Which explanation is most consistent with how long digits develop in bat embryos? a) Digits start the same length and some grow longer.
b) All digits start out long and some get shorter.
c) Initially the forelimb only has one digit; later, long digits form from the webbing.
d) As embryos use their wings in the womb, digits grow.​

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false