Question

cristae ______
matrix ______
outer membrane ______
ribosomes ______
inner membrane ______
mitochondria dna ______

1. why do different types of cells have varying numbers of mitochondria?

Explanation:

Mitochondria are the powerhouses of the cell, producing ATP (energy) through cellular respiration. Different cells have different energy requirements. For example, muscle cells (like in the heart or skeletal muscle) need a lot of energy for contraction, so they have many mitochondria. In contrast, skin cells have lower energy needs and thus fewer mitochondria. Cells with higher metabolic activity (e.g., liver cells, neurons) require more ATP, so they possess more mitochondria to meet their energy demands. Cells with lower metabolic activity have fewer mitochondria as they don't need as much energy production.

Answer:

Different cell types have varying numbers of mitochondria because they have different energy requirements. Cells with high metabolic activity (e.g., muscle, liver, nerve cells) need more ATP (energy) and thus have more mitochondria, while cells with low metabolic activity have fewer mitochondria.