Zoogloea form flocculent masses in

A) anaerobic sludge digestion.
B) primary sewage treatment.
C) activated sludge digestion.
D) tertiary sewage treatment.
E) water treatment.


C

Biology & Microbiology

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The allelic make up of a cell or individual is referred to as its  

A.  blueprint. B.  genotype. C.  phenotype. D.  pedigree.

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The appendages in both fishes and tetrapods develop from buds of ____, the middle embryonic tissue layer

a. ectoderm b. endoderm c. mesoderm d. epiderm e. hypoderm

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Plastids are storage organelles. A chloroplast is a type of plastid. What does a chloroplast store?

A) Energy B) Chlorophyll C) Carbon D) Electrons

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Which specific defense mechanism protects against foreign organisms that have managed to infect body cells by destroying these cells?

A) cell-mediated immune system B) antibody-mediated immune system C) pyrogens D) inflammatory response

Biology & Microbiology