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 Biology Questions

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Q:

Fat is completely digested in the

A) small intestine B) mouth
C) large intestine D) stomach
 
Answer & Explanation Answer: A) small intestine

Explanation:

Fat is completely digested in the small intestine of the body.

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Q:

Select the correct statement about the ureters.

A) The ureter is innervated by parasympathetic nerve endings only. B) Ureters contain sphincters at the entrance to the bladder to prevent the backflow of urine.
C) The epithelium is stratified squamous like the skin, which allows a great deal of stretch. D) The ureters are capable of peristalsis like that of the gastrointestinal tract.
 
Answer & Explanation Answer: D) The ureters are capable of peristalsis like that of the gastrointestinal tract.

Explanation:
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Q:

A genus can best be defined as

A) a taxon composed of one or more species and a classification level lying below family B) a taxon composed of families
C) the most specific taxon D) a taxon comprised of classes
 
Answer & Explanation Answer: A) a taxon composed of one or more species and a classification level lying below family

Explanation:

A genus can best be defined as a taxon composed of one or more species and a classification level lying below family.

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Q:

Genes are made of 

A) Carbohydrates B) Proteins
C) Fats D) Nucleotides
 
Answer & Explanation Answer: D) Nucleotides

Explanation:

Genes : The DNA is the genetic material. The DNA is made of several nucleotides. A nucleotide means, one nitrogenous base one sugar molecule and a phosphate molecule. These nucleotides occur in sequences and several nucleotides form one Gene ( a functional mgene is called a cistron)

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Q:

Which statement correctly describes the role of chance in evolution?

A) An allele that increases evolutionary fitness cannot be lost from a population by chance events. B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
C) Evolutionary change proceeds by an accumulation of changes that occur by chance. D) None of the above
 
Answer & Explanation Answer: B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA

Explanation:
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Q:

Receptors for hearing are located in the

A) Vestibule B) Tympanic membrane
C) Semicircular canals D) Cochlea
 
Answer & Explanation Answer: D) Cochlea

Explanation:

Receptors_for_hearing_are_located_in_the1537768165.jpg image

Receptors for hearing the organ of corti or the spiral organ is located in the the mammalian cochlea.

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Q:

The principle of dominance states that

A) Some alleles are dominant, while others are recessive B) All alleles are recessive
C) All alleles are dominant D) Alleles are neither dominant nor recessive
 
Answer & Explanation Answer: A) Some alleles are dominant, while others are recessive

Explanation:

The principle of dominance states that some alleles are dominant, while others are recessive.

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Q:

Stress is a factor that contributes to heart disease risk.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

True, Stress is a factor that contributes to heart disease risk.


More factors that contributes to heart disease risk are blood pressure, cholesterol, smoking, physical inactivity and overeating.

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