O 1943
1944
1945
1948
1947
1946
1949
1950
te is the
d and
rowth
ment
ear,
гу
popu-
ni-
Figure 2.6 Calculate the changes in
the rat population between 1946 and
1947, 1947 and 1948, 1948 and
1949, and 1949 and 1950. What might
account for these changes?

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

The activity of the modern sample is 1.10 bq . how long does that measurement take?

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.