All of the cells are in the very early stages of embryonic development and have not begun to differentiate into specialized types of cells. what type of cells would these be?

These are stem cells. Stem cells are cells that have not differentiated into specialized cells. In other words, they are "blank slates." Eventually, certain genes will be expressed and the cells will differentiate into cells, tissues, and organs with special functions.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms