Which muscles act involuntarily? (i)striated muscle (ii) smooth muscle (ii)cardiac muscle (iv) skeletal muscles (a) i and ii (b)ii and iii (c)iii and iv (d) i and iv

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

i think that you are smart and you should fit for it out

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek