Answer:
a
Explanation:
The ice cream melting is an example of thermal energy, because the heat of the sun is melting the ice cream
hope it helps
It could be an example of cooperation
To answer this question, subtract from the total population of 1000 the homozygous dominant (DD) frogs of 280 and the homozygous recessive (dd) frogs of 220, and you are left with 500 frogs that by default are <span>heterozygotes (dD). The frequency of these frogs would be 500/1000 = 0.5</span>