Question: he extends the same view to animals. the dean believes that single species of each genus were created in an originally highly plastic condition, and that these have produced, chiefly by intercrossing, but likewise by variation, all our existing species.
Answer: --> He extends the same view to animals. The Dean believes that single species of each genus were created in an originally highly plastic condition, and that these have produced, chiefly by intercrossing, but likewise by variation, all our existing species.

Question: but there is a possibility that you encounter some errors when the winzip file is set for extraction.
Answer: --> But there is a possibility that you encounter some errors when the WinZip file is set for extraction.

Question: sewing thread, containing predominantly, but < 85% cotton by weight (excl. that put up for retail sale)
Answer:
--> Sewing thread, containing predominantly, but < 85% cotton by weight (excl. that put up for retail sale)