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anyanavicka [17]
3 years ago
13

What is a substance?

Biology
2 answers:
Dafna11 [192]3 years ago
7 0
A substance is usually a form of matter having constant chemical composition and characteristic properties.
fomenos3 years ago
6 0

Answer:

the real physical matter of which a person or thing consists and which has a tangible, solid presence.

Explanation:

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A strain of Neisseria gonorrhea has a mutation which has caused it to lose the ability to produce fimbriae and become less virul
Ksju [112]

Answer: The pathogen has lost the function of the ability to adhere to cells of the body.

Explanation:

Neisseria gonorrhea is a gram negative bacteria that has the ability to attack and cause disease in man using its virulent factors. It is know to attack the urethra of both male and female producing an acute urethritis and tenda to spread locally if not treated. The virulent factors determines the ability of the organism to infect or damage it's hosts tissues and they include:

--> endotoxins

--> pilli

--> fimbriae

--> capsule polysaccharide expression

The fimbriae is one of the virulent determinants which the organism uses to attach to the host cells. As these bacteria multiple and grow, there are chances of mutation occuring. MUTATION is defined as the errors during DNA replication or induced by exposure to mutagens (like chemicals and radiation)

If the bacteria is affected by mutation, which can cause the gene for fimbriae production not to be expressed, the virulent factor of the organism will be highly affected as the first step to cause an Infection which is attachment is lost.

5 0
3 years ago
A biologist is in the process of classifying a newly discovered fungus. The fungus is a decomposer and has saclike structures. T
Ann [662]
Fungi that is associated with bread mold
8 0
3 years ago
Read 2 more answers
Why can many ecosystems exist in one biome
ryzh [129]
The definition of a biome is the community of many ecosystems in one general area. Many ecosystems can exist in a biome because a biome could have a water ecosystem and a dirt ecosystem.
6 0
3 years ago
Iron is part of the hemoglobin in red blood cells. what is the purpose of hemoglobin?
m_a_m_a [10]
The main purpose of hemoglobin is the transport of OXYGEN and CARBON DIOXIDE
4 0
3 years ago
Starfish and sea lilies <br> and sand dollars are example of what
Zigmanuir [339]

Answer:

Marine life, or sea cratures, or water creatures, or water type creatures.

Explanation:

Emphasis on SEA and I know starfish are also in the SEA.

7 0
2 years ago
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