The very broad field of study of animals is

After a sperm fertilizes an egg, the zygote undergoes

An organism that utilizes extracellular enzymes to digest and absorb food, multi-cellular and single-celled life cycle, and non-photosynthetic describes

Archaea, Eukarya, Bacteria are the three types of _____________ that encompass all living things.

reflect the hierarchical classification of taxonomic groups nested within more inclusive groups.

Intracellular digestion occurs

Organisms with the simplest tissue level of organization are 

_______________ symmetry is the arrangement of body parts in such a way that any plane passing through the axis divides the body into mirror images. 

Select the following phylum that includes animals that are segmented, bilaterally symmetric, and have a chitinous exoskeleton.

A “hot spot” that we discussed in class refers to