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BartSMP [9]
2 years ago
6

These antibiotics include penicillin and its derivatives and work by inhibiting the production of the bacterial ____________ .

Biology
1 answer:
hjlf2 years ago
5 0

These antibiotics include penicillin and its derivatives and work by inhibiting the production of the bacterial <u>enzymes</u>

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In a species of fish, fin shape is controlled by a single gene that has only two alleles. In a generation of 185 fish, the frequ
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The correct answer is: The recessive allele produces a phenotype that is better able to survive and reproduce than the dominant phenotype.

Natural selection (adaptation mechanism), gene flow, and mutation combine to change allele frequencies across generations. Natural selection tends to increase in frequency beneficial alleles, while it tends to decrease in frequency deleterious alleles.


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3 years ago
Based on what you know about the regulation of cell growth, make a list of questions you would ask as you observe the cells.
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Answer:

1. What genes control the growth of cell growth?

2. What is the purpose of this regulation?

3. What happened when the cell growth is not regulated?

Explanation:

What genes control the growth of cell growth? What is the purpose of this regulation? What happened when the cell growth is not regulated?

Above are the questions which an observe would ask about regulation of cell growth. A number of genes such as oncogenes and tumor suppressor genes are involved in the regulation of cell growth and cell division. Regulation of cell growth process ensures that a cell's DNA which is dividing is copied properly as well as repair errors in the DNA. It also ensures that each daughter cell receives a complete set of chromosomes in order to gain healthy daughter cells.

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2 years ago
(5.01 MC)An estuary ecosystem has been damaged by pollution and sediment runoff. What types of factors should be considered when
andrew-mc [135]

Answer: (D)

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A urease test is used to identifyMyobacterium tuberculosis because
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b) some bacteria reduce nitrate ion


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The diagram below shows the chemical structure of a type of lipid molecule called a phospholipid.
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Answer No 1:

Phospholipids are made up of phosphorus head and two fatty acid molecules.  These phosphorus head and fatty acid tail is joined together by glycerol. Fatty acid molecules are made up of Carbon, hydrogen and oxyge. Hence,carbon and hydrogen can be said as two other elements present in phospholipids.

Answer No 2:

The building blocks of lipids are glycerol and fatty acids.

Lipids can be described as vital organic molecules which are not soluble in water. They are made up of chains of carbon, hydrogen and oxygen. Someof the examples of lipids are fats and oils. Lipids are the main molecules present in an organisms cell membrane and hence have huge biological importance.

Answer No 3:

Lipids are biologically important molecules as they play very vital roles in the functioning of an organisms body. Two of the functions of lipids are:

  • Lipids and phosphorus molecules combine to form phospholipids. The phospholipids are the main molecules out of which the cell membrane is made. Hence, lipids play an essential role in providing the cell membrane its structure.
  • Lipids store energy and provide insulation to the body of an organism.
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3 years ago
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