Small bronchioles contain ________.

A. smooth muscles
B. cartilage rings
C. cilia
D. two of the above


Ans: A. smooth muscles

Biology & Microbiology

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A scientist discovers a new species near coral reefs in Australia. On basic microscopic examination and after conducting a few simple experiments, he finds that this single-celled species is photosynthetic (using sunlight for energy),

has a rigid cell wall structure with no peptidoglycan, uses a flagellum for motion, and contains a variety of internal structures that are bound by plasma membranes. Given this information, this new species is most likely a ______ cell in the _____ subcategory. A. bacterial; eubacterial B. eukaryotic; fungus C. archaebacterial; fungus D. eukaryotic; algae E. eukaryotic; protozoan

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The structure used for secreting the shell of many molluscs is called the:

a. foot. b. visceral mass. c. mantle. d. tentacles. e. radula

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The evidence that suggests that a whale is related to

sheep is due to which of the following skeletal structures? a. skull b. ankle c. pelvis d. spinal column e. none of these

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In which of these locations are salivary gland found?

A) side of the face below and in front of the ears B) the floor of the oral cavity C) roof of the oral cavity D) under the tongue.

Biology & Microbiology