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Paha777 [63]
3 years ago
7

What is the best definition of direct cause of disease?

Biology
1 answer:
vekshin13 years ago
8 0

Answer:

D. a cause that directly leads to a normal condition without interference

Explanation:

Direct contact infections spread when disease-causing microorganisms pass from the infected person to the healthy person via direct physical contact with blood or body fluids.

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Identifying the genetic sex of a child is based on finding intracellular barr bodies that consist of?
AURORKA [14]

Identifying the genetic sex of a child is based on finding intracellular Barr bodies that consist of inactive chromatin material.

Inactive chromatin material is the one where no transcription takes place. It is also known by the name heterochromatin. It appears as a dark condensed form in the chromatin.

Barr bodies are the inactive X chromosomes. These are mad inactive by a process termed as lyonization. It is essential to make the chromosome inactive in organisms with XY type of sex determination. They are present at the periphery of the nucleus. Inactivation of X chromosome makes the amount of X chromosomes equal in both, males and females.

To know more about Barr bodies, here

brainly.com/question/26376422

#SPJ4

8 0
2 years ago
Many of the organisms in the ocean are nutrient-limited. if you wanted to investigate this phenomenon, one reasonable approach w
Mamont248 [21]
None of the provided options are reasonable. <span>comparing nutrient concentrations between the photic zone and the benthic zone can not tell you whether differences in concentrations between the photic and benthic zone are due to uptake by phytoplankton or because nutrients are sinking to the sea bottom and ocean stratification is preventing mixing.  The approach of c</span><span>ontrasting nutrient uptake by autotrophs at different locations under different temperatures would not provide useful information on limiting nutrients. but rather uptake rates at different temperatures.  It is likely that e</span>xperimentally enriching some areas of the ocean and compare their productivity to that of untreated areas can provide an indication of limiting nutrients, but this is not advisable, as it would have to be done on a large scale, and one cannot be sure of the ecological consequences. Also, because it would not be a controlled experiment, other factors could create 'noise' in the data. The last option, <span>observe antarctic ocean productivity from year to year to see if it changes, also does not help, as there is no correlation between nutrient concentrations using this approach. The best approaches would be either the last approach, but with the additional monitoring of nutrient concentrations, or under a controlled laboratory experiment.</span>
5 0
3 years ago
If the atmosphere i slike a green house, what parts of it function as the "glass"?
My name is Ann [436]
The thermosphere keeps the earth from getting to hot frame the sun and it's the last layer so

the thermosphere
7 0
3 years ago
Which statement describes a similarity between the skeletal and muscular systems?
nasty-shy [4]

Answer:

D.Both systems control movement

Explanation:

Skeletal protect the organs and hold up the body to move and the muscular system is for controlling movement.

Feedback:I hope this helped you!!
6 0
3 years ago
What is the difference between polar and tropical air masses?
inessss [21]

Polar air masses are characterized by cold air near the surface while tropical air masses are warm or hot.

8 0
3 years ago
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