How many layers (germ layers) of cells are present in the EARLY gastrula? 

The structure that is either the egg or sperm, found in moss, ferns, and all plants is the _______.

The letter E in the image of a typical sponge above is _______.

The frog displayed in image B above is a _______.

Referring to the image above, a kidney is represented by _______. 

The frog displayed in image B above is a _______.

Select the best and most encompassing response. The worm shown in image A is _______.

Match the following function with its respective term: Female reproductive structure of the flower.  Contains one or more ovaries, which contains the ovules.  The ovules houses the egg.

The structures circled in red in the image of moss above are _______ and contain _______.

Referring to the image above, the diaphragm is represented by _______.