Which of these is a characteristic of index fossils?
a/found in the topmost rock layer.
b/found in many layers of the same rock.
c/have already established relative age.
d/are limited to a particular geographic location. (hu)

The transport tubes from food came down the plant are called?

What is the main fuel source for the work of the cell

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.