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STatiana [176]
3 years ago
5

Preexisting rock that is subsequently altered to form a metamorphic rock is termed a ________.

Biology
1 answer:
Elena-2011 [213]3 years ago
5 0

The right answer is protolith.


The protolith is an original rock of a metamorphic rock.

Metamorphism is the set of processes that induce mineralogical and textural modifications of a rock, in the solid state and under the effect of temperature, pressure and fluids.


When there is no longer any indication of the nature of the original rock, it is sometimes possible to identify it from the overall chemical composition of the rock (provided that the chemical changes are not too large).

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dem82 [27]

Answer:

Adenine; Thymine

Explanation:

  • The origin of replication in E.coli is called the oriC
  • This region is rich in Adenine and Thymine bases because their base stacking interactions are weaker than those of Cytosine and Guanine.
  • Between A and T bases there are only 2 hydrogen bonds (not a very strong interaction so requires less energy to separate) while between C and G bases there are 3 hydrogen bonds (strong interaction thus requires more energy to separate)
  • The oriC is a region which needs to be separated when replication occurs. It is thus a region which requires easy separation with as little energy as possible so that proteins like DnaA can bind.
6 0
3 years ago
A middle-aged woman is admitted to the coronary care unit with a diagnosis of left ventricular failure resulting from a myocardi
Fynjy0 [20]

Answer:

1. The oxygen deprived cardiac muscles caused chest pain.

2. Unavailability of oxygen and blood supply to skin cells made them pale and cold.

3. Accumulation of blood in pulmonary circuit caused moist sounds.

Explanation:

The left ventricle receives oxygenated blood from the left atrium. Oxygenated blood from the lungs is carried to the left atrium by pulmonary veins. The left ventricle pumps the oxygenated blood to all body parts through the aorta. Failure of the left ventricle deprived the skin cells of oxygenated blood. Oxygen deficiency stopped energy production by cellular respiration. The result was pale and cold skin.

Failure of the left ventricle led to the accumulation of blood in the pulmonary circuit since the blood was not delivered to body tissues. The build-up of blood and resultant higher blood pressure caused moist sounds in the lower lungs.  

The blockage of the coronary artery by a blood clot and death of a part of the heart due to lack of oxygen leads to a heart attack. The dead heart tissue is known as infarct and the resultant heart attack is myocardial infarction. Chest pain is caused due to the dead heart tissue or infarct.  

7 0
3 years ago
Majority of fresh water is not accessible because it is?
Alinara [238K]
About 0.3 percent is about the safe amount of water humans may consume, the other 99 percent is in oceans, soil, icecaps, and floating in the atmosphere.
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Why are Gram-negative bacteria more resistant than Gram-positive bacteria to damage by certain chemical agents like lysozyme?
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Answer:

Explanation:

Gram-negative bacteria are more resistant to lysozyme and antibiotics than Gram-positive bacteria, because they have a largely thick impermeable cell wall (peptidoglycan), an outer lipid membrane that causes reaching of antibiotics to bacteria harder.

Gram positive bacteria have thin lipid peptidoglycan cell walls.

4 0
3 years ago
Write a sentence that describes a variation that helps an organism survive
mart [117]
Typically, an organism has to have resources such as a food source, water source and some type of shelter in order to survive. For example, a bird needs to build a nest for a shelter, they have to have a water supply and a food supply of bugs or berries depending on the type of bird.
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3 years ago
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