Twins in space

exactly the same as another

• Identical

• radiation

• duplicate

• comparison

• DNA

appearing to be exactly the same

• identical

• comparison

• chromosomes

• duplicate

• radiation

energy that travels in the form of waves outward from a source, such as the sun

• identical

• DNA

• radiation

• comparison

• duplicate

examination of things to see how they are similar

• chromosomes

• identical

• DNA

• comparison

• radiation

parts of DNA in cells that contain the genes

• DNA

• chromosomes

• duplicate

• identical

• comparison

the substance in cells that determines the characteristics of a living thing

• DNA

• comparison

• radiation

• duplicate

• chromosomes

the answer to a subtraction problem

• sum

• commutative property of addition

• number sentence

• difference

• addends

the answer to an addition problem

• sum

• commutative property of addition

• number sentence

• difference

• addends

a complete sentence that uses numbers and symbols instead of words

• sum

• commutative property of addition

• number sentence

• difference

• addends

the numbers that are added together

• sum

• commutative property of addition

• number sentence

• difference

• addends