252 Ma<span> (million years) 
Please give brainliest
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These are known as Hormones. Hormones are chemical messengers that are released in one tissue normally endocrine glands for example, adrenal glands, pituitary glands, and transported in the blood stream to alter the activities of specific cells in other tissues. Hormones serves as messengers, controlling and coordinating activities or processes such as growth, metabolism and fertility in the body.
        
             
        
        
        
A gene is a section of DNA that codes for a trait or other functional product so the answer is B. gene :)))
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Answer: Responsible for formation of reproduction cells/gametes 
Explanation: Meiosis is significant because it makes sure that all organisms (which were produced via reproduction) contains the correct number of chromosomes. Also, Meiosis produces genetic variation by the process of recombination.