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Which of the following measured numbers contains the designated CORRECT number of significant figures? A) 0.04300               5 significant figures B) 0.00302               2 significant figures C) 156 000               3 significant figures D) 1.04                     2 significant figures E) 3.0650                 4 significant figures

Referring to the image below, which letter indicates the heart?  

Sea urchins can be classified as:

In birds, the gizzard is a structure associated with which system?

Analagous structures have the same function because they are derived from a common ancestral structure.

The only chordates that have lost segmentation as adults are:

All lophotrochozoans are triploblastic protostomes.

Sea stars, and other echiniderms, are all diploblastic protostomes.

 This fungus has a sac-like sporangium that known as a(n) _________________ . 

Referring to the image below, the red arrow is pointing to which of the following structures?