What is a relationship called between two types of organisms in which one benefits while the other remains unaffected?
A. Amensalism
B. Commensalism
C. Mutualism
D. Parasitism
B. Commensalism
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A pseudostratified epithelium is composed of _____
A) a single layer of cells of variable height B) a hierarchical arrangement of flat cells C) a tight layer of square cells attached to a basement membrane D) alternating layers of thick and thin cells E) a stacked layer of ciliated, mucus-secreting cells
The ________ and ________ domains of the class II MHC protein interact to form a peptide-binding site
A) B / T B) light / heavy C) C / V D) ?1 / ?1
Which of the following represents the correct order of vertebrate gastrointestinal tract layers, going from outside the tract to inside the tract?
A. the serosa, submucosa, and the lumen B. the submucosa, the mucosa, the lumen, the plexuses, and the serosa C. the serosa, the mucosa, and the submucosa D. the serosa, submucosa, and the mucosa E. the mucosa, the plexuses, and the serosa
What is cellular aging and what causes its occurrence? What will be an ideal response?