Which of the following is true for identical twins?
a. they are attached until just before birth.
b. they can have different genes.
c. they can have different fathers.
d. they can express the same genes differently.

the answer is d

Explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

light dependent reactions:

light independent reactions:

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