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AysviL [449]
3 years ago
11

Why viruses are unable to reproduce on their own

Biology
2 answers:
Yuri [45]3 years ago
6 0

Answer:

Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own. ... A primary reason is that viruses do not possess a cell membrane or metabolise on their own - characteristics of all living organisms. Viruses are non living and cannot reproduce on their own. Viruses lack most of the characteristics of living things. The aerage virus is large when compared with cells. Viruses can cause or help to prevent and treat disease.

Artist 52 [7]3 years ago
3 0

Answer:

A virus cannot reproduce on its own as it must infect another cell to spread. They technically are not living things like bacteria as viruses posses few characteristics of a living thing.

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what condition is a major contributor to disability and placement in nursing homes for those over age 75 and is often accompanie
Rina8888 [55]

Answer:

Dementia

Explanation:

Dementia is a condition that involves impaired mental ability and memory which is common among older adults. This condition, which is a major contributor to disability and placement of older adults in nursing homes, can be as a result of several factors of which nutrition has a major role to play. Metabolic and endocrine problem that results to the inability of the body system to regulate nutrients such as calcium and vitamin B-12, are some of the factors that triggers dementia in older adults. Also, nutritional deficiencies such as dehydration, inadequate intake of vitamin B-1, vitamins B-6, copper,vitamin E, and vitamin B-12 increases the chances of developing dementia in older adults.

Research shows that low levels of vitamin D can be linked to increased risk of developing dementia, and as such, supplements such as B-complex vitamin, vitamin C, and vitamin D is usually recommended for the prevention of dementia, especially when they are deficient in the diets taken.

7 0
3 years ago
Select the statements that accurately describe endocytosis. The cell membrane pinches off to form an extracellular vesicle joine
noname [10]

Answer: The cell membrane invaginates and pinches off, creating a vesicle within the cell.

Explanation:

Endocytosis is an active transport mechanism, for particules to be transported, the plasma membrane of the cell invaginates, forming a pocket around the target particle. The pocket then pinches off, resulting in the particle being contained in a newly created intracellular vesicle formed from the plasma membrane.

3 0
3 years ago
If a cells nucleus has 55% adenine bases, how many cytosine bases will be present?
Nostrana [21]

If a cell’s nucleus has 55% adenine bases it also has 55% thymine bases, so the percentage of cytosine bases is 45% as same as  guanine bases.

This is known as Chargaff's rule which states that DNA should have a 1:1 ratio of pyrimidine and purine bases (the amount of guanine should be equal to cytosine and the same thing with adenine and thymine).

DNA molecule globally has percentage base pair equality: %A = %T and %G = %C.

8 0
3 years ago
Which one is more important, a producer or decomposer
Diano4ka-milaya [45]

Answer:

Decomposers

Explanation:

Without decomposition, there is no life really. Although producers give off oxygen and food to consumers, they need organic and inorganic materials, water, air, carbon dioxide, etc. While decomposers, work with what they got

4 0
2 years ago
Read 2 more answers
All of the following are endocrine glands except the
oksian1 [2.3K]
Except the c) sweat gland
5 0
3 years ago
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