<h2>
<u>6</u><u>2</u><u>.</u><u> </u><u>B</u><u>.</u><u> </u><u>2</u><u> </u><u>AND</u><u> </u><u>4</u></h2>
<u>HOP</u><u>E</u><u> IT</u><u> </u><u>HELPS</u><u> </u><u>YOU</u>
I think you're talking about histones. Histones are proteins found in eukayotic cell nuclei. Histones are what DNA wrap around so it fits inside the nucleus and helps with the formation of chromosomes.
Something that requires a lot of energy, such as active transport, as more mitochondria means more respiration.
A
it says the swallows had Continued reduced reproductive success over time.
Answer:
a blob to generate to another which is option A:1
hope this helps you