@colddiggerYou're missing several commas and have too many apostrophes.
These are some of the modifications I did to certain parts.
"The Chickenpear split from its ancestor, the Needlewing, and took on a more biennial niche."
"After a year, they will have reached mature size and will begin seeking a mate."
"Its chemical signaling to the mother's body has increased focus"
"Eventually, the mother's body will begin to mummify"
"Over the next handful of weeks, the developing offspring"
"At some point eventually, the mother's body fails"
I probably missed a couple, but I was able to get these.