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lisabon 2012 [21]
3 years ago
10

_____ is the study of living or once-living things. This includes the human body.

Biology
1 answer:
Andreas93 [3]3 years ago
6 0

The study of the lives of early human communities through the examination of their physical remains. Objects made by humans that are unearthed by archaeologists. ... The study of the earth, especially it's rock forms.

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The following table shows the symptoms in four patients. Each patient suffers from a different disease.
Harrizon [31]

Answer:

A

Explanation:

  • Tuberculosis is a bacterial infection caused by <em>Mycobacterium tuberculosis</em>.
  • It is spread via air when affected people cough, sneeze, spit or speak.
  • It mostly affects the lungs, thus, damaging the respiratory system. Affected people have difficulty breathing, produce bloody mucus and have a chronic cough.
  • Antibiotic treatment is used for treating it but many people have developed resistance to the antibiotic treatment, giving rise to a new condition called Multi Drug Resistant Tuberculosis (MDR-TB).
3 0
3 years ago
Read 2 more answers
Which environmental factor could lead to a decrease in genetic variation in a population of tuna?
jeyben [28]

Answer:

The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).

Explanation:

There is a correlation between genetic variability and environmental pollution, the latter being a factor that impacts negatively on the variability of a specific population.

The concept of pollution stress not only implies a low rate of reproduction, but it is also a factor that prevents genetic exchange with other populations, which is a factor that makes the genetic variability decrease in a population.

For these reasons an increase in pollution implies a decrease in genetic variability in a tuna population.

  • <em>Other options, such as </em><u><em>an increase in food availability</em></u><em>, a</em><u><em> decrease in tuna fishing </em></u><em> or </em><u><em>a decrease in tuna predators</em></u><em>, are environmental factors that contribute to increased genetic variability.</em>

3 0
3 years ago
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Some cells have several nuclei per cell. how could such multinucleated cells be explained?
Serga [27]
Cytokinesis did not occur properly during the cell cycle. Ie. the splitting of the cytoplasm was not done. hence the genetic materials are separated in two distinct nuclear envelope. if this continued of non-cytokinesis,then more distinct nuclei can occur
7 0
3 years ago
determine the ratio of average maximum elongation rate for the modified RNA polymerase compared to the wild strain RNA polymeras
Vinil7 [7]

Answer:

Check the c in the explanation

Explanation:

a) RNA has three components - 1) 5 - carbon ribose sugar (2) phosphate group (3) nitrogen base

RNA polymerase is an enzyme involved in transcription where genetic material DNA is transcribed into RNA ( mRNA,rRNA,tRNA).

b) the dependent variable here is what we are looking in the experiment , here it is number of nuceotides per second ,the transcription efficiency of RNA polymerase. And the two controls are important wild type without drug and experimental strain without drug these two tells about baseline of transcription rate of an enzyme. so that one can explain the drug effect on a enzyme.

c) In both wild type and exp strain upon treatment with amanitin the transcription rate decreased in exp strain it is not significant whereas in wild type the effect is much higher compare to exp strain and it is significant. this suggests that the mutation in experimental strain must be on larger subunit of the RNA pol enzyme. that mutation might be showing effect of binding drug to the enzyme and also has a role for its enzyme activity.

and the reduction of transcription rate is 100% efficient in wild type compared with exp strain.

d) a null hypothesis is a general statement in a statistics where there is no measured phenomenon between groups.

the change in the amino acid is an important clue, tells that there is no effect in transcription rate between experiment strain with and without drug . which in turn tells that the mutation is imp for the activity of the Enzyme for its role.

Kindly check the attached image below

4 0
3 years ago
What is a question that might be investigated by an environmntal scientist
insens350 [35]
Where is the natural habitat at
5 0
3 years ago
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