The biological species concept cannot be applied to bacteria because Select one: a. they are single-celled b. they are all pathogens c. they reproduce by binary fission (simple cell division) d. they die

The bacterium Agrobacterium infects plants and causes plant cells to develop tumorlike cellular structures and begin synthesizing sets of proteins that protect the bacterium from the plant immune response, as well as synthesize nutrients that can be used exclusively by the bacterium. Researchers testing the efficacy of two new antibiotic treatments against Agrobacterium are tasked with designing an experiment to test their effectiveness. Which of the following describes the most appropriate control group in this experiment? A B с D a group of infected and untreated plants of the same species a group of uninfected and untreated plants of a different species a group of infected and untreated plants of a different species a group of uninfected and untreated plants of the same species

In a series of infection experiments, a researcher discovers that the ID50 value for the infectious bacterium Parasiticum mucoides is 2,000, and that the ID50 for another infectious bacterium, Donoteatum thisbacterium, is 150.  Given these data, a person exposed to 1,000 bacteria of each type would be more likely to be infected by which bacterium? There is no way to know given the information provided Both infections are equally likely Donoteatum thisbacterium Parasiticum mucoides

3) Phylogenetic tree of selected bacteria Numbers at the end of lines indicate the species represented by that endpoint 1) Gram-negative bacteria 4 8) Gram-positive bacteria 5 10 11 Ancestor of all Bacteria

5) The biological species concept cannot be applied to bacteria because a.they reproduce by binary fission b.they are single-celled c.they die d.they are all pathogens

two directly trasmitted viral diseases have the same basic reproduction number (R0 - R not) even though their dynamics are different. Which of the following differences between the two diseases could lead to the same basic reproduction number? a. one disease has a higher transmission rate and a longer recovery period than the other  b. one disease has a lower transmission rate and a longer recovery period than the other c. one disease has a lower transmission rate and a shorter recovery period than the other d. for one disease, the recovert period is long; for the other, no one recovers

Look at the graph and answer the question on the other image