__________ are inflammatory molecules that are usually found in blood in an inactive form. Once activated, they help to attract neutrophils to the injured area.
A) Histamines
B) Prostaglandins
C) Kinins
D) Leukotrienes
Ans: C) Kinins
Biology & Microbiology
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Members of the ____ ("jointed feet") Ecdysozoan phylum have a segmented body encased in a rigid exoskeleton made
of chitin plus other materials.
a. Arthropoda b. Onychophora c. Nemertea d. Annelida e. Nematoda
Biology & Microbiology
Each tRNA has an __________ that base-pairs with a codon, and each binds to the kind of amino acid
specified by the codon. Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
A typical soil is composed mostly of humus. Indicate whether the statement is true or false
Biology & Microbiology
Organisms that are characterized by being unicellular, photosynthetic, and having double shells made of silica are known as
A. kelps. B. foraminifera. C. dinoflagellates. D. diatoms. E. euglenoids.
Biology & Microbiology