B replaced because it takes place when water dissolves the original hard parts and replaces them with mineral matter.
Extra-abdominal position means that the testes hang outside the abdomen and are not in it. This is important because the sperms in the testes are very susceptible to high temperatures - meaning that they can easily die due to high temperatures like what we have within the abdomen
Gymnosperms is the term for a plant that produces seeds without a protective cover.
The viperfish is a heterotroph, not an autotroph due to the fact that it eats to live. Although it is not a common fish, the deep-sea viperfish population is seemingly stable. It is on neither the endangered nor the threatened species list.
Kinda blurry soooo if you can retake the picture it would help a lot :)
