Which statement describes the best example of an observational study? O A. A scientist measures the height of different mountains in Asia.
O B. A scientist measures the height of trees before and after they are
given fertilizers.
O C. A scientist measures the speed of a river without a dam and
compares it to the speed of a river with a dam.
O D. A scientist measures the weight of bears in protected habitats and
compares it to the weight of bears outside protected habitats.

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.

Is dna the same in every cell in the human body explain your answer

Based on the number of offspring they produce at one time organisms are classified into two categories many offspring at once and a few at a time sort the carry sticks based on the category they describe