completed question'
.....culturing viruses that requires a human host
Answer:
Diploid cell culture lines, developed from human embryos, are widely used for culturing viruses that require a human host
Explanation
Viruses can not thrive in a non-living host or artificial media.They are intracelular parasites which needed living host to replicate . Cultures lines from Human embryo in are therefore used for culturing viruses of human host, so that its mode of replication and gene expression can be studied, and therefore its virulence can easily be studied.
This method have the advantage that;
1.there is no need to make use of the whole animal rather,on a tiny tissue needed can be isolated for culture.
2. the cells growth is continuous,and can be preserved in liquid Nitrogen and renew for future culture
3. cells can be grown in different containers, with ability to decide the number of cells needed.
Temperature is kept at optimum for human in the culture at 37 degree centigrade, nutrients are provided, NaHC03 as buffers for C02, and the medium is humidified.
Answer:
a complex series of feeding relationships with many organisms interacting and depending on each other
Explanation:
Answer:
D) Apes and chimpanzees are thought to have evolved from a common ancestor.
To identify people by DNA it is better to make copies of non-coding segments because they exhibit more variation than genes.
- The polymorphic sequences of non-coding DNA vary between individuals in humans.
- Variable number tandem repeats, or VNTRs, are created when DNA sequences are repeatedly replicated in the genome's non-coding regions.
- It is possible to create a person's genetic fingerprint by counting the amount of repeats, which varies between individuals.
- However, this non-coding DNA is used in criminal investigations by forensic experts.
- There are distinctive repeating patterns found inside this area of DNA that can be utilized to distinguish one person from another.
- Short tandem repeats (STRs) are a type of pattern that can be measured to determine a person's DNA profile.
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C. Color of leaves
If the question goes like this: Which best describes plant classification? <span>
A. Nonvascular plants are grouped into seedless and seeded plants. </span><span>
B. Seedless plants are grouped into gymnosperms and angiosperms.</span> <span>
C. Gymnosperms are grouped into monocots and dicots. </span><span>
D. Angiosperms are grouped into monocots and dicots.</span> <span>
The best answer will be letter D. Angiosperms are grouped into monocots and dicots.</span><span> Botanists grouped or classified together according to its characteristics. </span>
