Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate. The parasympathetic nervous system (PNS) releases the hormone acetylcholine to slow the heart rate. Such factors as stress, caffeine, and excitement may temporarily accelerate your heart rate, while meditating or taking slow, deep breaths may help to slow your heart rate.
        
             
        
        
        
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I agree this makes complete sense
 
        
             
        
        
        
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 All living cells contain ribosomes, tiny organelles composed of approximately 60 percent RNA and 40 percent protein
can i have brainlyest
 
        
                    
             
        
        
        
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Perhaps the single greatest contribution Linnaeus made to science was his method of naming species. This method, called binomial nomenclature, gives each species a unique, two-word Latin name consisting of the genus name and the species name. An example is Homo sapiens, the two-word Latin name for humans.
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Can I have brainliest 
It is from Google 
 
        
             
        
        
        
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consumers: 
- fox
- buzzard
- rabbit
- mouse
- titmouse
- grasshopper
- butterfly
- snake
- frog
- dragonfly
- greenfly
- ladybird
producers:
- plantain
- berries
- grasshopper
- rabbit
- mouse
- titmouse
- snake
- frog
- butterfly
- ladybird
- greenfly
- dragonfly
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I might be super wrong lol take this with a grain of salt eheh