Fossils found in layers of sediment give us clues to Earth's past. Based on the fossil record of this area, we can assume that over million of years. A. sea level receded
B. the galciers melted
C. the climate became colder
D. the continents
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How was the climate when the ambulocetus was alive

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human

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