Biochemistry

To solve the problem, we need to understand the term used to describe the gradual and predictable change in species composition in a particular area over time.

1. Understanding the Concept:

- In ecology, areas undergo changes in the types of species living there due to environmental factors, disturbances, and biological interactions.
- This process happens gradually and follows a predictable pattern, leading to the development of a stable community.

2. Key Term:

- This gradual and predictable change is called ecological succession.
- Ecological succession can be of two main types:
• Primary Succession: Occurs in lifeless areas where no previous community existed (e.g., after volcanic eruptions).
• Secondary Succession: Occurs in areas where a community previously existed but was disturbed or destroyed (e.g., after forest fires).

Final Answer:

The gradual and predictable change in species composition in an area is known as ecological succession.

To solve the problem, we need to identify the type of bond that links amino acids together to form a protein chain.

1. Understanding Amino Acids and Proteins:

- Proteins are made up of smaller building blocks called amino acids.
- Amino acids join together in a chain to form proteins.
- The bond that connects one amino acid to another is crucial for protein structure.

2. The Bond Between Amino Acids:

- The bond formed between the amino group (–NH₂) of one amino acid and the carboxyl group (–COOH) of another amino acid is called a peptide bond.
- This bond is created through a chemical reaction called a condensation reaction or dehydration synthesis, where a molecule of water is released.
- A chain of amino acids linked by peptide bonds is called a polypeptide, which folds to form a functional protein.

3. Summary:

- Peptide bonds hold amino acids together in proteins.
- These bonds give proteins their primary structure.

Final Answer:

The type of bond found between amino acids in a protein chain is a peptide bond.