What is the term given to organisms, such as kudzu or zebra mussels, that when introduced into a new ecosystem, thrive and reproduce quickly often causing native species to become extinct? a) invasive species b) secondary species c) welcome population d) reproductive individuals

List two new traits (structural or behavioral) that each new species of rat might demonstrate as it adapts to the conditions on two of the four islands. choose only two islands that are described in the lesson. record the island latter and the major habitat feature of the island. then list two new traits each rat subspecies might demonstrate in order to survive the habitat on that island. note: new traits should be unique to that island and be in response to that island’s habitat feature. i cannot remember islands that were names in the lesson so only answer if you have done the lesson (5.13 life science 7b) choose 2 of the islands and describe a structural and a behavioral trait for a rat on each island so 4 total answers, 2 different structurals and 2 different behaviorals, one for each rat for each island

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?