Like animals, plants must maintain an internal balance, or homeostasis.
Hope this helps chu 
Have a great day 
☆ Dont forget to mark brainliest ☆
 
        
             
        
        
        
You would die because the radiation levels would disrupt brain waves causing heart failure, stroke, ect.
        
                    
             
        
        
        
Layers of cross-bedded sand can be indicative of a DESERT environment wind is responsible for the formation of these sedimentary structures. Sand dunes preserved in rocks can be quite large. These structures form as a result of the migration of dunes due to the action of the wind. Dunes are not often preserved but a few can be observed in thick sandstone units. 
        
             
        
        
        
Hi there!
We can go through the overall function of all three of these:
mRNA: transcribed from the DNA, has the protein's composition written in it, and brings that to a ribosome where the protein will be made
tRNA: looks at the codons (set of 3 nucleotides) on the mRNA and brings amino acids which match up to that codon
rRNA: significant part of the composition of ribosomes
Now, looking at these, and back to the answer choices, we can already see that a, b, and c are correct. d, on the other hand, is incorrect. 
Hope this helps! Feel free to let me know if you have any questions about this specific problem.