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Klio2033 [76]
2 years ago
9

Which two phrases most likely explain how the rock shown here formed?

Biology
1 answer:
Elina [12.6K]2 years ago
5 0
I think its a and b, but i dont know what kind of rock it is. my guess is a metamorphic or sedimentary.
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None of the above is the correct answer.
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What type of immunity exists when a person is exposed to an antigen and subsequently makes antibodies against the antigen?
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To know more about acquired immunity, refer to the following link:

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7 0
1 year ago
Homework. Unanswered
Dennis_Churaev [7]

Gram-positive bacteria are bacteria that have thick cell walls which yield positive results in the Gram staining test. Lipoteichoic acid is a major component of the cell wall of gram-positive bacteria.

  • All bacteria indicated in the question can be classified by the Gram staining test:
  1. Actinomycetes are Gram-positive bacteria
  2. The genus <em>Arthrobacter </em>includes Gram-positive bacteria
  3. <em>Escherichia coli </em>(<em>E. coli</em>) is a Gram-negative bacterium
  4. <em>Staphylococcus spp.</em> are Gram-positive bacteria
  5. <em>Bacillus spp</em> are Gram-positive bacteria
  6. <em>Mycobacterium spp.</em> are Gram-positive bacteria

  • Prokaryotes can be divided into two domains: Bacteria and Archaea.

  • Gram staining is a method used to classify bacteria, but this method IS NOT USED to stain Archaea.

  • In consequence, I would not use the Gram test to stain Archaebacteria because Archaebacteria aren't bacteria (Option A is correct).

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