Which of the following characteristics allowed early gnathostomes to become successful predators?
A) fins stiffened with bone that increased manoeuvrability and improved gas exchange through the skin
B) fins stiffened with bone that increased manoeuvrability and improved gas exchange in the gills
C) lobe fins that allowed temporary access to land and improved gas exchange through the skin
D) lobe fins that allowed temporary access to land and improved gas exchange in the gills

Question

Quizplus · Accepted Answer

Fins stiffened with bone provided greater maneuverability in the water, which allowed early gnathostomes to be more effective hunters. Additionally, the bone stiffening likely improved gas exchange in the gills, which would have increased their overall fitness. Lobe fins, while important for early vertebrate evolution, would not have provided the same benefits for predatory behavior.

Which of the Following Characteristics Allowed Early Gnathostomes to Become