Ammonoids are good as index fossils because of the following characteristics;
<span>1.
</span>Their abundance and vast distribution across most shallow
marine waters during the periods
<span>2.
</span>They have easily recognizable
features, such as shells and the highly crenulated and complex suture, that are well preserved in rocks
<span>3.
</span>Their rapid
evolution that can assist determine changes and variations in the then environment
Answer:
Hi
Explanation:
It separates the content of cell from their external environment.
It controls the entry and exit of materials in nd out of cell
Answer:
I'm guessing you mean science? And if that is what you meant, yes, I do like science. I do pretty well at it, although if I had to choose, my favorite subject is English.
Explanation:
cells all feature a nucleus, and their organelles are enclosed inside
