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Ugo [173]
2 years ago
12

Why are fossil fuels nonrenewable?

Biology
1 answer:
just olya [345]2 years ago
5 0
The answer is the first one A
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Match the structural formula to the chemical formula for this substance.
makkiz [27]

Answer:C2H6)

Explanation:

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3 years ago
Plz help don’t get was not at school
STALIN [3.7K]
2. solar system 1. is elliptical
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What was a mining process that removed large quantities of earth.
jasenka [17]

Answer:

Open-cast mining

Explanation:

The aftermath of open cast mining are pits (called quarries) on the surface of the earth where the surface soil has been removed/ displaced to access the mineral deposits that are just close or at the surface of the earth. This type of mining results in environmental degradation because they disturb the biodiversity of the ecosystem in which the mining is taking place. Rehabilitation of the area is required after the mining has been exhausted to restore the initial environment.

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2 years ago
6. A scientist measures the circumference of acorns in a population of oak trees
melisa1 [442]

Answer:

6. 2 cm

8. Greater than 2 cm and less than 2 cm

Explanation:

Complete Question

6. A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. What would you expect the most common circumference(s) to be after 10 generations of stabilizing selection?

-2 cm

-Greater than 2 cm or less than 2 cm

-Greater than 2 cm and less than 2 cm

-Can't tell from the information given

8. Refer to question 6, but this time answer what you would expect after 10

generations of directional selection.

-2 cm

-Greater than 2 cm or less than 2 cm

-Greater than 2 cm and less than 2 cm

-Can't tell from the information given

Solution -

6. In an stabilizing selection, the average trait of a given population is favored over extreme values. Hence, it can be said that one specific trait is over presented in a given population. For example – uniform human birth weight, number of eggs a bird lay etc.  

Here in this case if most common circumference is 2 cm , then the tree population will try to have this trait as a stabilizing trait.  

Thus, option A is correct

8. In a  directional selection, the genetic variation decreases as per the environmental change. And hence the average trait will not be selected. Instead traits either higher or lower the average values will be preferred.  

Thus, option C is correct

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3 years ago
A student constructs a Venn diagram to compare the organelles in plant and animal cells. Venn Diagram of Plant and Animal Cells
Kipish [7]

Answer:

mitochondrion

Explanation:

centrioles are found in animals only, and chloroplast cell wall is found in plants only.

Hope it helps.

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3 years ago
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