Most biologists agree that the most recent common ancestor of all animals was probably a ____, an

idea first proposed by Ernst Haeckel in 1874.



a. jellyfish
b. ciliated protozoan
c. sessile sponge
d. chytrid
e. colonial, flagellated protist


E

Biology & Microbiology

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Which of the following is true of vitamins?

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What does an electrocardiogram (ECG) measure? How does it work?

What will be an ideal response?

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