Ans: D) heavy use of antibiotics in medicine and in agriculture
Which of the following human activities has contributed to an increase in the number of bacteria having R plasmids?
A) nitrogen fixation by genetically engineered plants
B) improper use of restriction enzymes in research and medical facilities
C) increased carcinogen exposure from excessive fossil fuel burning
D) heavy use of antibiotics in medicine and in agriculture
Biology & Microbiology
You might also like to view...
If you discovered a new colonial organism living deep on the sea floor, how could you determine whether it reproduced sexually or asexually? (Check all that apply)
_____ Compare DNA to see if nearby individuals are identical. _____ Compare morphology to see if nearby individuals are identical. _____ Look for external buds still attached to the parent. _____ Look for a coelom. _____ Look for gonads with mitotic figures and embryos. _____ Look for gonads with meiotic figures and gametes. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about sexual vs asexual reproduction? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Proces Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Biology & Microbiology
Which of the following contain enzymes used in the breakdown of glucose and generation of ATP?
a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. endoplasmic reticula
Biology & Microbiology
Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly
A. stimulating components of the immune system through the release of cytokines. B. stimulating the production of specific antibodies. C. blocking or reducing the inflammation response in mucous membranes. D. recruiting macrophages to the nasal epithelium. E. lysing virus-infected cells and preventing further propagation of the pathogen.
Biology & Microbiology
_______ are the primary sources of most antibiotics.
A) Bacteria and viruses B) Viruses and protistans C) Protistans and fungi D) Fungi and bacteria
Biology & Microbiology