Use the below pair of names of fill the gaps in the given statement.
''Connell's elegant field experiments showed that on rock sea coasts of Scotland , the larger and competitively superior barnacle ………dominates the intertidal area, and exclude smaller barnacle ........... from that zone''

Options

A. Chathamalus, Balanus
B. Balanus, Balanus
C. Chathamalus, chhathamalus
D. Balanus , Chathamalus

Answer

To fill in the gaps in the statement regarding Connell's field experiments on rocky sea coasts of Scotland, we need to identify the correct barnacle species that fit the context of the experiment.

1. **Identify the larger and competitively superior barnacle**: According to Connell's experiments, the larger barnacle that dominates the intertidal area is **Balanus**. This species is known for its competitive superiority over other barnacle species in the intertidal zone.

2. **Identify the smaller barnacle**: The smaller barnacle that is excluded from the intertidal area by Balanus is **Cthalamus**. This species is less competitive and is typically found in the upper intertidal zone where it is less affected by competition from Balanus.

3. **Construct the final statement**: With the identified barnacle species, we can now fill in the gaps in the statement. The completed statement reads: "Connell's elegant field experiments showed that on rocky sea coasts of Scotland, the larger and competitively superior barnacle **Balanus** dominates the intertidal area and excludes the smaller barnacle **Cthalamus** from that zone."

### Final Answer:
Balanus, Cthalamus