Which of the following factors can lead to desertification in the presence of natural drought? a. deforestation b. sustainable grazing c. underground mining d. all of the above (not b)

What amino acid is coded for by this sequence after the mutation

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?