Question

1. what are the two main types of transport? what sub - categories of transport belong to each main type?

Explanation:

In a biological context, the two main types of transport across cell - membranes are passive transport and active transport. Passive transport does not require energy and includes diffusion, facilitated diffusion, and osmosis. Active transport requires energy (usually in the form of ATP) and includes primary active transport and secondary active transport. In a general transportation context, the two main types could be public transport (such as buses, trains, subways) and private transport (such as cars, motorcycles).

Answer:

Biological context: Main types - passive transport, active transport. Passive transport sub - categories: diffusion, facilitated diffusion, osmosis. Active transport sub - categories: primary active transport, secondary active transport. General transportation context: Main types - public transport, private transport. Public transport sub - categories: buses, trains, subways etc. Private transport sub - categories: cars, motorcycles etc.