Which of the following is not a bacterial STD?
A. Hepatitis C
B. Gonorrhea
C. Syphilis
D. Chlamydia
E. Trichomonas
A. Hepatitis C
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Which photoreceptor cells are more numerous?
A. Rods B. Cones
Which of the following statements accurately describes the organization of structures?
A. Organisms are made up of tissues, which are made up of organ systems, which are made up of DNA. B. Tissues are made up of organs, which are made up of cells, which are made up of individual atoms. C. Organs are made up of cells, which are made up of atoms, which are made up of molecules. D. Organs are made up of tissues, which are made up of cells, which are made up of organelles and molecules. E. Organ systems are made up of cells, which are made up of tissues, which are made up of organelles.
The specific foreign substances that an individual's immune system has the ability to recognize and resist are determined by ________
A) individual exposure to the specific foreign substance B) individual genetic makeup C) the total number of lymphocytes present at a given time D) the total number of macrophages at a given time E) the total number of self-antigens at a given time
Within the first twelve weeks of development, the basis for organ formation is established. This process is called
A) organogenesis. B) implantation. C) gastrulation. D) embryogenesis. E) None of the answers are correct.