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matrenka [14]
3 years ago
7

Why have scientists developed vaccines?

Biology
2 answers:
GuDViN [60]3 years ago
7 0

Answer:

to treat illnesses (number 3)

Explanation:

:3

Dennis_Churaev [7]3 years ago
3 0

Answer:

  • scientists have developed vaccines to prevent diseases
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Parts and function of microscope levels of organization comment/remark
katen-ka-za [31]
ok so no problem i’ll is going on the same page as ttyy and
7 0
2 years ago
In cats having hair is dominant (H) over not having hair (h). If a male cat that is heterozygous for hair is crossed with a hair
alexgriva [62]
A heterozygous cat has a genotype Hh
A hairless cat has a genotype hh
When crossed, the results could be any of the following:
Hh (with hair)
hh (hairless)
There is a 50:50 chance or 1: 1 ratio that the offspring will have hair.
7 0
3 years ago
Both viruses and cells have?
Marysya12 [62]

Answer:

The only structure or component that a virus and a cell have in common is Nucleic Acid.

Hope this helps. :-)

6 0
3 years ago
Mike works in the metals industry. Which type of coal should he use as a fuel source?
Sonbull [250]

Answer:

B. bituminous

Explanation:

Bituminous coal is an organic sedimentary rock produced by compression of peat bog material by diagenesis and submetamorphics.

Bituminous coal has low moisture and high carbon content and hence used for the production of steel and cement, coke production an electricity generation.

Coking coal is a type of Bituminous coal are best used as fuel dource in metal industry having very narrow range of volatility and plasticity. Volatility is maintained by smelters  to optimize the ease of burn rate,  ignition, and energy output of the coal as this determines the burn rate of the coal.

Hence, the correct option is B. bituminous.

8 0
3 years ago
What are the stages of mitosis in detail
disa [49]
Mitosis begins with prophase, during which chromosomes recruit condensin and begin to undergo a condensation process that will continue until metaphase. In most species, cohesin is largely removed from the arms of the sister chromatids during prophase, allowing the individual sister chromatids to be resolved.

Prometaphase begins with the abrupt fragmentation of the nuclear envelope into many small vesicles that will eventually be divided between the future daughter cells. The breakdown of the nuclear membrane is an essential step for spindle assembly.

Next, chromosomes assume their most compacted state during metaphase, when the centromeres of all the cell's chromosomes line up at the equator of the spindle. Metaphase is particularly useful in cytogenetics, because chromosomes can be most easily visualized at this stage. Furthermore, cells can be experimentally arrested at metaphase with mitotic poisons such as colchicine.

The progression of cells from metaphase into anaphase is marked by the abrupt separation of sister chromatids. A major reason for chromatid separation is the precipitous degradation of the cohesin molecules joining the sister chromatids by the protease separase.

Mitosis ends with telophase, or the stage at which the chromosomes reach the poles. The nuclear membrane then reforms, and the chromosomes begin to decondense into their interphase conformations. Telophase is followed by cytokinesis, or the division of the cytoplasm into two daughter cells. The daughter cells that result from this process have identical genetic compositions.
5 0
3 years ago
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