Question

Place these events in order from first to last by placing the numbers one through six on the blank next to each event.

a) C, B, A, F, D, E
b) B, C, A, E, F, D
c) C, B, F, A, D, E
d) C, B, A, F, E, D

Answer 1

The correct order of events based on the context of circulatory system evolution towards increasingly complex or closed systems is 'F, E, C, A, B, D'. This sequence represents the progression from the most primitive stage to the most advanced stage in circulatory system evolution.

Step-by-step explanation:

To place the events in order from first to last, we must identify the correct sequence based on the context provided. In this context, the order of events is referring to the general trend in circulatory system evolution toward increasingly complex or closed systems. Based on this understanding, the correct sequence is the following:

1. F - Represents the most primitive stage in circulatory system evolution with an open system.
2. E - Shows an advancement from the most primitive stage but still not as complex as later stages.
3. C - Indicates the appearance of more complex features, but before the fully closed systems.
4. A/D/B - Represent stages in the evolution towards a completely closed circulatory system, with 'A' being the closest to the completely closed system stage.

Considering the information above, the correct order from the options provided would be: 'a. F, E, C, A, B, D' as it matches the trend toward increasingly closed systems. Other options do not represent this progression accurately.