It is true for mitochondria:They had developed from chloroplasts through evolution.They can be secreted from the cells and have an independent existence.Their matrix is found between their two membranes.Glycogen is hydrolyzed to glucose inside them.Their inner membrane has a larger surface than their outer membrane.

The statement contains several assertions about mitochondria. Let's examine each one:

1. "They had developed from chloroplasts through evolution." - This is not accurate. Mitochondria are thought to have originated from a symbiotic relationship between early eukaryotic cells and a type of bacteria, not from chloroplasts. Chloroplasts, on the other hand, are thought to have evolved from a similar relationship with cyanobacteria.

2. "They can be secreted from the cells and have an independent existence." - This is also not accurate. Mitochondria are organelles within eukaryotic cells and cannot exist independently. They rely on the cell for many functions, including the production of proteins necessary for their operation.

3. "Their matrix is found between their two membranes." - This is accurate. The matrix of a mitochondrion is the space within the inner membrane.

4. "Glycogen is hydrolyzed to glucose inside them." - This is not accurate. Glycogen is broken down into glucose in the cytoplasm of the cell, not in the mitochondria. The mitochondria are involved in the subsequent steps of glucose metabolism, where glucose is broken down to produce ATP, the cell's energy currency.

5. "Their inner membrane has a larger surface than their outer membrane." - This is accurate. The inner membrane of a mitochondrion is highly folded into structures called cristae, which increase its surface area. This allows for a greater number of electron transport chains, which are involved in ATP production.