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Q:

What organelle is responsible for photosynthesis?

A) mitochondria B) Cytoplasm
C) Chloroplasts D) Ribosomes
 
Answer & Explanation Answer: C) Chloroplasts

Explanation:

Chloroplasts are organelles in plant and bacteria cells that contain the chlorophyll is responsible for photosynthesis.

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Filed Under: General Science
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Q:

Which statement best describes the electronegativity of an element?

A) Electronegativity of an atom is it's ability to produce energy while losing an electron. B) Electronegativity of an atom is it's ability to attract electrons during bond formation.
C) Electronegativity of an atom is it's ability to lose electrons during cation formation. D) Electronegativity of an atom is it's ability to share electrons during a covalent bond formation.
 
Answer & Explanation Answer: B) Electronegativity of an atom is it's ability to attract electrons during bond formation.

Explanation:

Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.

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Filed Under: Chemistry
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Q:

How long is a term in the house of representatives?

A) 5 B) 2
C) 4 D) 6
 
Answer & Explanation Answer: B) 2

Explanation:

Members of the House of Representatives serve two-year terms and are considered for reelection every even year.

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Filed Under: Indian Politics
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Q:

Which of these was a political goal for farmers?

A) lower prices for grain storage B) higher prices for machinery
C) lower prices for foreign goods D) higher prices for shipping
 
Answer & Explanation Answer: A) lower prices for grain storage

Explanation:
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Filed Under: Indian History
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Q:

Which of these is an example of negative feedback?

A) After you eat, insulin stimulates the lowering of blood sugar levels. B) Once labor begins, contractions increase in frequency and intensity.
C) After you eat, glucagon stimulates an increase in blood sugar levels. D) As a blood clot begins to form, the process of its formation gets faster and faster.
 
Answer & Explanation Answer: A) After you eat, insulin stimulates the lowering of blood sugar levels.

Explanation:

Eating raises blood sugar levels, insulin stimulates the lowering of blood sugar level. In this example the response to the stimulus (increased blood sugar levels) opposes that stimulus (by lowering blood sugar levels).

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Filed Under: General Science
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Q:

Which best matches the description with the genetic material?

A) Chromosomes are located in the cytoplasm. B) DNA is located in the nucleus.
C) Nucleotides form a helical structure that is called a gene. D) Chromosomes create genes.
 
Answer & Explanation Answer: B) DNA is located in the nucleus.

Explanation:

DNA is the genetic material in the cell. 

 

Hence, option B) DNA is located in the nucleus best matches the description with the genetic material.

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Filed Under: Biology
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Q:

Which best summarizes the concept of natural selection?

A) the fittest organisms survive and reproduce B) an organism will always adapt to its environment
C) an organism will always mutate to survive D) a mutation always makes a species fitter
 
Answer & Explanation Answer: A) the fittest organisms survive and reproduce

Explanation:

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

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Filed Under: Biology
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Q:

Which colony was farthest north?

A) Massachusetts B) Virginia
C) Georgia D) New Hampshire
 
Answer & Explanation Answer: A) Massachusetts

Explanation:

There are 13 colonies and are ruled by England.

 

The farthest north colony - Massachusetts

The farthest south colony - Georgia

The oldest colony - Virginia

The colony between the 2 parts of Massachusetts - New Hampshire

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Filed Under: World Geography
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