In the human disease known as lupus, there is an immune reaction against a patient's own DNA from broken or dying cells, which categorizes lupus as _____
A) an allergy
B) an immunodeficiency
C) an autoimmune disease
D) an antigenic variation
E) a cancer
Answer: C
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When a vesicle moves along microtubules toward the center of the cell, the molecular motor(s) _____ are used?
A. dynein B. both kinesin and dynein C. Molecular motors are not required for movement along microtubules. D. kinesin
Scanning tunneling electron microscopes create a three-dimensional image of specimens at atomic level resolution.
Answer the following statement true (T) or false (F)
As humans age, their ability to focus on nearby objects deteriorates. This is the result of
A) loss of rods and cones. B) increased viscosity of the aqueous and vitreous humor. C) stiffening of the lens and loss of accommodation capability. D) inappropriate response of the iris to varying light intensities. E) changing shape of the eyeball.
What is thought to be true about the three domains of living things?
a. they diverged from a common ancestor fairly recently b. they diverged from a common ancestor before the evolution of the main groups of eukaryotes c. they did not have a common ancestor d. Domains Bacteria and Archcaea evolved after the main groups of eukaryotes