Which resource is a nonrenwable resource Fresh water
Maple trees
Solar energy
Precious metal

Precious metal

Explanation:

Non-renewable resources are things you cannot get back once used. Metals will run out eventually however we can still renew fresh water from evaporation, maple trees are renewable from new seeds, and solar energy is renewable because it is constantly being produced.

the time that cell spend in prophase is 30 minutes

Explanation:

The computation is shown below:

= Number of cell ÷ sample

= 25 ÷ 100

= 1 ÷ 4

Now it takes two hours

So,

= 1 ÷ 4 × 2 hours

= 0.5

This 0.5 represent the 30 minutes

Hence, the time that cell spend in prophase is 30 minutes