The tsar and tsarins had five children. did all seven familiy members have the same mitochondrial dna

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.

True or false: the breakup of pangea resulted in warm wet global climates?

"does stress during a woman's first trimester of a pregnancy affect the infant's birth weight? " is a