Which statement is true regarding endospores and sporulation?
a. The three steps of sporulation are activation, germination, and outgrowth.
b. Endospores readily take up stain and thus are often seen as stained circles within vegetative cells.
c. Calcium complexed with dipicolinic acid helps to dehydrate a developing endospore.
d. Sporulation is a type of reproduction and is an alternative to binary fission.
Answer: C
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Griffith, a British microbiologist, used bacteria and mice to demonstrate the process of transformation. During transformation,
A. a bacterial chromosome produces an exact copy of itself. B. the nucleus of a mouse cell repairs itself when damaged by bacterial infection. C. DNA from an infected mouse cell changes bacteria from a non-pathogenic to a pathogenic form. D. genetic material is transferred from one bacterial cell to another. E. a bacterial cell is transformed into a spore during unsuitable environmental conditions.
What other information is related to the question? Which information is most useful?
What will be an ideal response?
When this energy is reradiated as infrared radiation (heat), it is absorbed by these gases in the atmosphere.
A. greenhouse. B. refrigerants. C. isotopes of oxygen. D. isotopes of hydrogen.
Which eye color has dense melanin deposits in the iris?
A. Blue B. Gray C. Brown D. Green E. Brown and blue