Which of the following is associated with the phylum Annelida?

a. radial symmetry
b. ctenidia
c. chaetae
d. radula


c. chaetae

Biology & Microbiology

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Which bones make up the hard palate?

a. maxillary and mandibular b. palatine and maxillary c. sphenoid and maxillary d. sphenoid and palatine e. palatine and mandibular

Biology & Microbiology

________ is the primary germ layer that forms the nervous system and the outer layer of skin and its derivatives, such as hair, nails, oil glands, sweat glands, and mammary glands

Fill in the blank(s) with correct word

Biology & Microbiology

Which of the following pairs is NOT correctly matched?

A) elementary body — Escherichia B) endospore — Bacillus C) endospore — Clostridium D) heterocyst — cyanobacteria E) myxospore — gliding bacteria

Biology & Microbiology

Why is perspiration an effective defense against microorganisms?

A) basic pH and low salt content B) basic pH, low salt content, and presence of lysozyme C) low salt content D) presence of lysozyme E) basic pH

Biology & Microbiology