Good afternoon, Nicol3713. I think the answer would be B - Rough ER because the bound ribosomes are attached to the rough ER or nuclear envelope. It should be right. Let me know if you need any more help. Have a great day!!
Answer:
B and D
Explanation:
Since it says all carbon atoms have six electrons, we know that they only have six protons too. The carbon 13 and 14 means they have extra neutrons that increases their atomic mass.
Answer:
There is no actual way that the mantle could be...'exposed' or 'seen'. But scientists have managed to find multiple ways to analyze the mantle and it's actual existence by using multiple devices. The mantle is basically a 2,900 kilometers (1,802 miles) thick blocks of rocks and minerals underneath the crust(or the surface of the earth) , and makes up a whopping 84% of Earth's total volume.
The answer is C. lack of competition.
hope that helps
