Answer:
The oxygen molecule O2 is considered a molecule but not a compound. This is because O2 is made of two atoms...
Because for female sex link desease would require X°X° but for male X°Y so during crossing X linked dear are more common in male.
Its defensive, warning coloration is bright colors. Such as poisonous dart frogs, they are brightly colored in order to warn predators they are poisonous
Answer:
A portion of the Earth's atmosphere that protects the Earth from radiation
