Lamarck's inheritance of acquired characteristics included the idea that
A. species are only produced through special creation.
B. local catastrophes cause mass extinctions of species.
C. there is a natural force in all living things that pushes them toward perfection.
D. species are fixed and unchanging over time.
Answer: C
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Pus formation in skin lesions caused by Staphylococcus aureus infections is in part due to production of
A) coagulase. B) hemolysins. C) leukocidin. D) catalase.
The basic unit of a DNA molecule is the
A. nitrogenous base. B. sugar-phosphate backbone. C. amino acid. D. nucleotide. E. ribose sugar.
Which of the following is related to an increase in the chance of breast cancer?
A) early menopause B) pregnancy C) early first menstruation D) breast-feeding
Which of the following statements concerning pathogen-associated molecular patterns (PAMPS) is
false? a. They are features of pathogens recognized by cells of animals. b. They trigger activation of phagocytes. c. They react with specific receptors on host cells. d. They are found on all microbes except viruses. e. An example is the peptidoglycan of grampositive bacteria.