In the broth dilution test, the highest concentration of the antibiotic resulting in no growth after 16 to 20 hours of incubation is the MIC.
Answer the following statement true (T) or false (F)
False
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Lipids _____
A) are insoluble in water B) are made from glycerol, fatty acids, and nitrogen C) contain less energy than proteins and carbohydrates D) are made by dehydration reactions E) contain sulfur polymers
In what order would a vaccination needle pass through the layers of the skin?
a. dermis-hypodermis-epidermis b. dermis-epidermis-hypodermis c. hypodermis-dermis-epidermis d. epidermis-dermis-hypodermis
e. epidermis-hypodermis-dermisA group of geneticists exposed the seeds of a dicot plant to various levels of radiation in order to induce random mutations. Many of the irradiated seeds failed to germinate
Some of the seeds, however, germinated in the lab and were carefully studied. The scientists discovered a mutation that prevents the formation of a hypocotyl hook during germination. Based on this scenario, the mutant plant most likely germinated A) but was unable to photosynthesize. B) but damage to the cotyledons prevented the seedlings' emergence from the soil. C) but the mutated hypocotyl hook caused damage to the emerging root tip. D) and grew like a normal plant. E) but the mutated hypocotyl hook failed to push the cotyledons above the soil.
Two populations of catfish have lived in separate neighboring lakes for many generations. Population A contains about 30% short whiskered catfish (ww) and 70% long whiskered catfish (WW or Ww); Population B contains about 10% short whiskered catfish and 90% long whiskered catfish. Following a year of record rainfall, both lakes rise enough to allow the catfish populations to swim between the two lakes and interbreed. What will be the effect(s) over time of this interbreeding?
A. Population A will see an increase in long whiskered fish and Population B will see an increase in short whiskered fish. B. Population A and Population B will experience an increase in genetic diversity. C. Population A will see an increase in long whiskered fish, but Population B will not see any changes in the prevalence of the two phenotypes. D. DIfferences in the frequencies of W and w between the two populations will decrease. E. DIfferences in the frequencies of W and w between the two populations will increase. F. Population B will see an increase in short whiskered fish, but Population A will not see any changes in the prevalence of the two phenotypes.