A hiker is walking through an apple orchard growing two varieties of apple trees – Festival and Cool Crisp. This person notices that the leaves of all the trees are curled. This person wonders, “Are all apple leaves curled?” In order to answer the hiker’s question, which of the following would be the most useful hypothesis?

A.

Some apple leaves are curled and others are not.

B.

If a leaf is from a fruit tree, then it will be curled.

C.

Apple leaves may be curled.

D.

All apple leaves are curled.

One of the newest applications of cell technology is called cybrid embryos. this process involves replacing the nuclear material of an animal cell with human nuclear material. how might this process affect public policies about research by using stem cells? the same policies and concerns about the use of human embryonic stem cells would most likely apply. the embryos would most likely be treated like traditional animal embryos and regulated accordingly. the process of forming cybrid embryos would most likely be banned by government regulators. the embryos would be treated as regular cells because they are not fully human in origin.