Answer: Option A.
Different beaks were available
Explanation:
Variation is the difference between traits, cells, or characteristics between organisms of any species which is caused by change in genetic information or effect of environmental factors on the expression of genes.
From the question, different beaks were available because there is variation or differences in shapes, sizes and expression.
Both auxin and cytokinin are used to increase size of stem and fruits
The piano could only be played with 12 fingers, which is rare because humans normally have ten fingers.
Answer:
physical change alert the form of appearance of the matter but does not turn any substance in the matter into a different substance.
If you make a punnet square out of this, there is no possibility to have a recessive trait because neither parents have it plus dominant is always going to overrule recessive traits.