<span>A tiger looks so much different as an adult than it did as a single fertilized egg because it developed through different stages from being a zygote (fertilized egg), to becoming an embryo (where it experiences intense cellular changes), to becoming a fetus (where it gains a great measure of cell specialization, and develops distinct tissues and organ systems). After birth, the tiger still undergoes further growth and development into adulthood. This is largely regulated by the expression of different genes at different times and also by environmental factors.</span>
It would be B. A bristlecone pine forest that contains tree that are over 500 years old. why? because when you think about it the other 3 were man planted and man done but B. was not it was the natural way/ an old-growth forest.
D) the expiraments cannot last billions of years as it did earlier on
It doubles, so the answer is 8 chromosomes.
