Muscle fibers are long, think cells that can do something that other cells cannot do-they are able to get shorter by contracting. Question 2 options:
True
False

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million