________ is a predator that bores a hole through the outer membrane of its Gram-negative bacterial prey and then reproduces in the periplasm.
A. Mycococcus
B. Bdellovibrio
C. Vampirococcus
D. Syntrophobacter
Answer: B
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What will be an ideal response?
A city was intensively sprayed with DDT to control houseflies. The number of houseflies was immediately greatly reduced
Each year thereafter, the city was sprayed again, but the flies gradually increased in numbers until 10 years later, when they were almost as abundant as they were when the control program began. Which explanation applies to this situation? A) Flies from other areas moved in and replaced the ones killed by DDT. B) The few flies that were affected by DDT but survived developed antibodies to DDT, which they passed on to their descendants. C) The DDT caused new mutations to occur in the surviving flies, resulting in resistance to DDT. D) The DDT killed most flies. The few that were already naturally resistant survived and passed this resistance on to their offspring.
You propose an experiment where root hairs of a particular plant species are continuously treated with an antibiotic while nutrient levels in the plant tissue are monitored. Based on your knowledge of root hairs, you hypothesize the plant will experience a deficiency in what nutrient?
A. calcium B. phosphorus C. nitrogen D. carbon E. potassium
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What will be an ideal response?