The hollow<span> part of a </span>bird bone<span> isn't wasted space. In some </span>bones<span>, the </span>hollow<span> cavities contain extensions of the air sacs from the lungs. These air sacs help the </span>bird<span> to get the oxygen it needs to fly quickly and easily.</span>
Answer:
Negative and Positive paragraphs.
Explanation:
Positive statements tell us what is. Negative statements tell us what is not.
<u>Spanish Translation:</u>
<u>Las declaraciones positivas nos dicen qué es. Las declaraciones negativas nos dicen lo que no es. </u>
<u>Espero que esto ayude!</u>
It'd probably get heavier, and fall faster, instead of floating.
Answer:
A.
Explanation:
Because the trait undergoes a secondary loss; it has been there but it doesn't always appear in all generations.
