Ascidians are sac-like marine organisms. their larvae have well-developed brains and dorsal nerve cords. this suggests that ascidians should be classified with the

Option B. Chordates

Explanation:

Please see the attachment

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature