Which type of muscle tissue is both voluntary and striated? smooth
cardiac
skeletal
heart

skeletal muscle fibres.

Explanation:

skeletal muscle fibres occur in muscles which are attached to the skeleton. They are straited in appearance and under voluntary control.

Hope it helps.

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.