A chromosome contains one long DNA strand.
B.
Answer is C hope it helps
3 is the correct answer. Let me know if you want me to explain why that is the answer.
<em>A placental mammal develops before its body systems can function independently;</em>
A. Inside it's mothers body
<u>Mammals don't come from eggs, and the term placental mammal means it has a placenta. It comes out when our mothers deliver. A marsupial mammal forms in a pouch, so the answer is inside it's mothers body </u>
This is called the Green house effect
