Answer: Probability/mutations
Explanation: A punnett square predicts the probability that a child or the offspring will receive specific genes or look a certain way. The genes with the highest percentage or usually the ones that show, but sometimes recessive genes are the ones that show through, which may be what you mean by a different genotype/phenotype being different that what was predicted by the punnett square.
a mutation may also occur that messes up all of this.
There wouldn’t be genetic variations so many of us would look the same as each other.
I believe the answer is 3.Cellulose
Fiber is carbohydrate that can't be digested by human. Consumption of fiber will not give calorie like other food do, but it has other benefit for the digestive system such as helping regulate blood sugar level and satiety.
Cellulose is fiber that could be found in cell wall of green plants. Cellulose is the most common insoluble fiber.
Birds live virtually everywhere on Earth because they have evolved endothermy, the ability to use their metabolism to maintain a constant body temperature.
Birds belong to the class aves; they have an extremely efficient, one way breathing system with additional air sacs. Flying birds have strong, hollow bones and powerful flight muscles. Most birds can fly, they have a strong heart and an efficient way of breathing; which are necessary for birds to fly.
