If one parakeet is heterozygous, that means it has one dominant gene and one recessive gene (Rr). If the other is homozygous for white feathers, then it has two recessive genes (rr). Crossing these two in a punnet square gives you 50%.
You didn't put any options but an example of biological weather can be the weakening of a substance such as a rock being broken down due to various plants(... so nothing man made). Hope this helps :)
Answer:
Canyon.
Explanation:
Weathering, volcano, mountain, and erosion are not good answers.
<em>Hope this helped</em><em> </em><em>:</em><em>)</em>
I think it’s a forelimb of a whale
