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Which type of skeleton contains the carbohydrate called chitin?

In the cnidarians, the two body types are the sessile _____________ and the free-living _______________.

A feature that only mammals have is:

When dawn arrives after the first night, what plan do the captain and crew decide to carry out?

Which of the following does the man that they see on shore—standing on the steps of the omnibus—do?

In Florida, when do we draw the line between what is considered native and what is considered exotic?  

Every lizard has claws.  Some lizards have large claws and some have small claws.  The size of an individual lizard’s claw is a/an [Answer1]) controlled by that lizard’s [Answer2].

Which of the following is an example of the effects of Climate Change?

What must be measured when determining the biodiversity of a community?

[Answer1] happens to species while [Answer2] happens to populations.