Hi I’m a 13 year old boy who’s underweight and short I am 4 foot 5 and 73 pounds how many calories should I eat to gain atleast 0.25 pounds of lean muscle mass a week

i think your fine if you love your body then your good no need to change

Explanation:

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

b. the carbon cycle ensures living things have a source of hydrogen