The first answer is correct. rRNA makes up ribosomes along with other protiens. rRNA stands for ribosomal ribonucleic acid
A Lipid because it's a fresh osmosis they are always active
<span>The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of </span>calcium ions.
Slow-block to polyspermy is also called cortical reaction. In this reaction, the sperm will be permanently blocked by cortical granules. The release of calcium ion will trigger this reaction.
The raw material from which sedimentary rocks are formed is D. Weathered remains of other rocks.
Smog is an abiotic factor affecting a biotic factor(s).
This is because smog isn't a living organism so it is abiotic while humans are multicellular organisms so therefore, they are biotic factors.
Smog has a negative effect on many biotic factors.
