Biology Questions

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:

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:

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:

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:

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:

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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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:

Self pollination will lead to

A) Inbreeding B) Over breeding
C) Outbreeding D) Rare breeding
 
Answer & Explanation Answer: A) Inbreeding

Explanation:

Self pollination occurs in the flowers when the pollen grains of the flower falls on the stigma of the same due to wind or insects like moths and bees. This lead to the inbreeding.

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