The structure that mollusks use to excrete wastes is known by the name of nephridia. Among all the options that are given in the question, the correct option is option "b". Mollusk is the other name for shellfish. there are three varieties of shell fish present. Hatcher footed, Belly footed and head footed variety of shellfish are available.
Decomposers are organisms that break down dead organisms and release nitrogen back into the cycle
Because you need your legs to carry your whole body, so, essentially, your legs have to have bigger bones and muscles.
D) Freedom 7, or also known as Mercury-Redstone 3....... Hope it helps, Feel free to ask more :)
