Plants roots display positive gravitropism which means they grow in the direction of gravity
        
             
        
        
        
The energy source that is described in the image is light energy from the sun. The correct option is A.
<h3>What is chloroplast?</h3>
Chloroplast is a cell organelle that contains chlorophyll and aids in the process of photosynthesis in the presence of sunlight using carbon dioxide and water.
The missing image of the question is attached as an image.
The energy source that is described in the image is light energy from the sun. 
Thus, the correct option is A.
For more details regarding chloroplast, visit:
brainly.com/question/11136550
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Aceibitorshope this helps
        
             
        
        
        
Dinosaurs became common on land  
        
                    
             
        
        
        
The correct answer is: (a) RNA polymerase (along with its sigma subunit) can initiate transcription on its own.
More differences between prokaryotic and eukaryotic transcription:
•	In prokaryotes transcription occurs in the cytoplasm (unlike in eukaryotes in nucleus) and it is simultaneous with translation,
•	In prokaryotes there is only one type of RNA polymerase (in eukaryotes there are three types of them).
•	There is no sigma subunit in eukaryotes, the initiation of transcription begins thanks to initiation factors.
•	Promoter region in prokaryotes contains pribnow box, while in eukaryotes it contains TATA and CAT box.