Answer:
Option B, Marble
Explanation:
Limestone or marble is severely affected by the acid. Acid rain causes corrosion of all building and sculpture that are made up of marble. The sulphuric and nitric acid in the acid rain reacts with the calcite in the marble to dissolve it. This leads to peeling of marble structure which further exposes black crust made of gypsum formed by the reaction between calcite, water and sulphuric acid.
2) Mercury
3) Earth
4) Mars
Please explain
The planet that has the lowest average density is Mars. The correct option is 4.
The entire mass of a region divided by the total volume of that region yields the mean or average density.
By multiplying each compound's density by its volume and then dividing the result by the sum of all the volumes, one can determine the mixture's average density.
The average density of different planets is:
Venus; 5.2
Mercury; 5.4
Earth; 5.5
Mars; 3.9
So, the lowest density out of these planets is Mars. Density is something's concentration. If the density is low, the weight of the object will be low. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher.
Therefore, the correct option is 4) Mars.
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The correct answer is option D
Reflections from the surface warm the atmosphere.
Reason -Radiation is the process by which the earth radiates the heat absorbed by it during the day time. The earth absorbs the solar radiation during the day time and gets heated , during evening the earth emits the heat in the form of reflections i.e radiation due to which the hearth gets further heated up.
It may be due to the fact that there was an event that eliminated many of the individuals in species.
The term genetic variation refers to the occurence of organisms in a specie that are composed of different genotypes.
If the genetic variation in a population at the yellowstone park is decreased it may be due to the fact that there was an event that eliminated many of the individuals in species.
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B. Life on land only.
C. Virtually all life on Earth.
D. Life in cities only.
C. Virtually all life on Earth.
They have affected nearly every life form.
B. serosa, mucosa, submucosa, and muscularis externa
C. submucosa, serosa, muscularis externa, and mucosa
D. mucosa, submucosa, muscularis externa, and serosa
The order of the lumen layers is mucosa, submucosa, muscularis externa, and serosa. The correct option is D.
The gastrointestinaltract is indeed the digestive tract or passageway that connects the mouth to the rectum. In humans and other animals, the GI tract contains all of the major organs of the digestivesystem, including the esophagus, stomach, and intestines.
The alimentarytract's primarily chief function is to transform food into absorbable particles and transport them to the body's other organs.
Every organ of the alimentarycanal has the same four basic layers, from the esophagus to the rectalcanal.
Mucous membrane, submucosa, muscular layer, and serous layer are the correct layers within the alimentary canal wall from inside to outside.
Thus, the correct option is D.
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