can sum1 help me with these m/c questions?
Blood in the pulmonary artery compared to blood in the aorta will have:
(A) more oxygen and more carbon dioxide
(B) more oxygen and less carbon dioxide
(C) the same concentration of oxygen and carbon dioxide
(D) less oxygen and more carbon dioxide
(i say d but im not sure)
It is thought that swans evolved to have long necks mainly through:
(A) changes in their physical environment
(B) competition for limited food resources
(C) constant stretching to reach food on the bottom of aquatic environments
(D) changes in their chemical environment
(i say b)
14. A hospital laboratory technician was examining some culture plates. She noticed a
colony from a strain of relatively harmless gut bacteria called enterococcus growing on a
culture medium containing three different antibiotics. Enterococci are also commonly
found in wounds infected with the dangerous bacterium Staphylococcus aureus (‘Golden
Staph’).
Use your understanding of bacteria and the problem of antibiotic resistance to decide
which of the following statements is most correct.
(A) There is no way of killing this enterococcus bacterium now that it has become
resistant to antibiotics
(B) Even though the enterococcus bacterium is relatively harmless, the laboratory
technician should still report her observation, as genetic information controlling
resistance to these antibiotics could be transferred from enterococcus to diseasecausing
bacteria, like Staphylococcus aureus, by transduction or conjugation
(C) The enterococcus bacterium could still cause harm to humans by feeding on these antibiotics, when they were prescribed by doctors, and so prevent these
antibiotics from protecting against disease-causing bacteria, like Staphylococcus aureus
(D) If people ingested these enterococcus bacteria with their food, these people would become resistant to the antibiotics.
i say c?
heres a short questions aswell any help will be much appreciated!
(b) Briefly explain why convergent evolution occurs and identify the result of convergent evolution.
Blood in the pulmonary artery compared to blood in the aorta will have:
(A) more oxygen and more carbon dioxide
(B) more oxygen and less carbon dioxide
(C) the same concentration of oxygen and carbon dioxide
(D) less oxygen and more carbon dioxide
(i say d but im not sure)
It is thought that swans evolved to have long necks mainly through:
(A) changes in their physical environment
(B) competition for limited food resources
(C) constant stretching to reach food on the bottom of aquatic environments
(D) changes in their chemical environment
(i say b)
14. A hospital laboratory technician was examining some culture plates. She noticed a
colony from a strain of relatively harmless gut bacteria called enterococcus growing on a
culture medium containing three different antibiotics. Enterococci are also commonly
found in wounds infected with the dangerous bacterium Staphylococcus aureus (‘Golden
Staph’).
Use your understanding of bacteria and the problem of antibiotic resistance to decide
which of the following statements is most correct.
(A) There is no way of killing this enterococcus bacterium now that it has become
resistant to antibiotics
(B) Even though the enterococcus bacterium is relatively harmless, the laboratory
technician should still report her observation, as genetic information controlling
resistance to these antibiotics could be transferred from enterococcus to diseasecausing
bacteria, like Staphylococcus aureus, by transduction or conjugation
(C) The enterococcus bacterium could still cause harm to humans by feeding on these antibiotics, when they were prescribed by doctors, and so prevent these
antibiotics from protecting against disease-causing bacteria, like Staphylococcus aureus
(D) If people ingested these enterococcus bacteria with their food, these people would become resistant to the antibiotics.
i say c?
heres a short questions aswell any help will be much appreciated!
(b) Briefly explain why convergent evolution occurs and identify the result of convergent evolution.
