For 3 the value of x is 106
For 6 the value of x is 20
For 9 the value of x is 44
Answer:
the waste product of respiration
Explanation:
lol
Absorbs nutrients from food
<span>Three anatomical features that birds share with their theropod ancestors are:
</span><span>1. they had light, hollow bones
</span>2. they rearranged hip and leg muscles because this of <span>improved bipedal movement
</span>3. they had their flight oriented with the use of wings for balance