Which of the following plants is not an annual?
a. corn
b. geranium
c. sunflower
d. marigold
e. carrot
E
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A researcher has mapped the entire genome of an insect. She notices that the genome contains around a thousand copies of a particular DNA sequence. What is the most likely function of this DNA sequence?
A. The sequence most likely has no function. B. Its function is to code for rRNA. C. Its function is to provide antibiotic resistance. D. Its function is to copy and move within the genome via an RNA intermediate.
Carl Woese is BEST known for discovering that ________
A) eukaryote membrane-bound organelles are descended from endosymbionts B) the oldest fossils are 3.4 billion years old C) prokaryotes comprise two very different branches: Bacteria and Archaea D) energy acting on gases and water vapor will create a "primordial soup" of organic molecules E) the last universal common ancestor (LUCA) did not have DNA-dependent RNA polymerase
Your text describes an experiment in which low-nutrient conditions select bacteria that would kill off other bacteria
When nutrients became plentiful again, these killer bacteria became less common because they had lower fitness in this environment, but they didn't become extinct. Why would some of the killer bacteria survive in the new environment? A) They're waiting for a future time when that trait may be useful again. B) They have changed the killer gene to a less costly one but can regenerate the killer gene when necessary. C) Competition must be low enough that the disadvantage of having the killer trait isn't great enough to cause extinction. D) The killer trait is a dominant trait, so it cannot be eliminated.
Discuss 5 specific contributing factors in the occurrence of health-care-associated infections, and then discuss 3 actions that can help decrease their rate at health care facilities.
What will be an ideal response?