Answer:
A group of cells make a tissue, a group of tissues make and organ, a group of organs make an organ system, and an organ system makes a organism.
 
        
             
        
        
        
 Due to a genetic modification, a mouse has no horizontal cells in its retinas and it does not expresses the connexin26.
What is  horizontal cells?
The horizontal cells has receptive field with the neurobiotin and controlled by the electrical coupling.
 
Horizontal cells are the laterally interconnecting neurons having cell our bodies withinside the internal nuclear layer of the retina of vertebrate eyes. They assist combine and alter the enter from a couple of photoreceptor cells.
To read more about the horizontal cells refer link :
brainly.com/question/25508290
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Answer:
write the procedure in the passive voice (reporting fashion )
 
        
             
        
        
        
Answer:
The correct answer is - per gram, the marathon runner's muscles would contain more myoglobin than the sprinter's muscles.
Explanation:
Marathon runners have smaller leg muscles and thinner quads and calves as marathon runners require slow-twitch muscles while in sprinters the fast-twitch muscle requires. Slow-twitch muscles of marathon runners have more amount of myoglobin, per gram than fast-twitch muscles.
Myoglobin acts as local oxygen storage that provides oxygen to the muscles in case of less oxygen supply than required temporarily and a marathon race is an intense exercise or activity that requires more oxygen.