A dihybrid cross AaBb x AaBb will result in what offspring ratio? • 4:4:2:2
•1:3:1
•3:1
•9:3:3:1

the answer is c) abandoned properties that are contaminated with hazardous materials.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.