In this diagram, which of the following numbers represents the actual event of egg activation? 
A. I
B. II
C. III
D. IV
E. V
Answer: C
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The gastrovascular cavity of a sponge serves important functions in both the circulatory and ____ systems
a. digestive b. endocrine c. muscular d. reproductive e. urinary
The success of Chitwan National Park in Nepal is attributed primarily to ____
a. ecotourism b. exclusion of local residents c. ecosystem valuation d. benefits provided to local residents e. income derived through hunting
According to the theory of endosymbiosis, which organelles evolved from small prokaryotes that established residence within other, larger prokaryotes?
A) vacuoles and lysosomes B) Golgi apparatus and endoplasmic reticulum C) centrioles and ribosomes D) mitochondria and chloroplasts
Interspecific competition occurs between members of the same species
a. true b. false