Which of the following do not serve as antigen presenting cells?
A. B lymphocytes
B. Macrophages
C. Basophils
D. Dendritic cells
Answer: C
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The organism in the accompanying figure belongs to which group?
a. excavates b. alveolates c. stramenopiles d. green algae e. rhizarians
What is a possible reason for oxygen to be so low by the end of the night?
A) Algae produce oxygen as a by-product of photosynthesis mostly during the day, and not at night. B) Fish consume oxygen during the night, and oxygen starts to run out by dawn. C) Both of these explain the low level of oxygen D) Neither of these explains the low level of oxygen
Which one of the following is not a common mechanism by which antimicrobial agents kill or inhibit the growth of bacteria?
A) damage to cell membranes B) destruction of capsules C) inhibition of cell wall synthesis D) inhibition of protein synthesis
Living members of the ____ lineage have fins supported by thin and flexible bony rays
a. Petromyzontoidea b. Chondrichthyes c. Actinopterygii d. Myxinoidea e. Sarcopterygii