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Quarter 1-Science 9-Living Things and Their Environment

Quiz by Merced Ansay

Grade 9
Philippines Curriculum: Grades K-10 (MELC)

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14 questions
Show answers
  • Q1

    What is the automatic reaction of the body when foreign material accidentally enters the trachea?

    cough or choke


    sore throat


  • Q2

    Which is the correct order of air flow during exhalation?

    nasal cavity or nose, bronchi, trachea, pharynx, larynx, alveoli, bronchus

    nose or nasal cavity, pharynx, larynx, trachea, bronchi, bronchus, alveoli

    pharynx, trachea, bronchus, bronchi, larynx, alveoli, nasal activity or nose

    alveoli, bronchus, bronchi, trachea, larynx, pharynx, nasal cavity or nose

  • Q3

    Secondhand smoke emitted by a lit cigarette combined with the smoke exhaled by an active smoker is referred as _______.

    active smoke

    passive smoke

    dirty air

    environmental smoke

  • Q4

    Which of the following food intake is caused by primary hypertension or high blood pressure?

    high sugar intake

    high vegetable intake

    high cholesterol intake

    high salt intake

  • Q5

    If Roberto’s father has hemophilia and his mother is a carrier, what is the chance that Roberto would inherit the disease?



    50 %


  • Q6

    Which of the following determines the sex of an organism?

    the female parent

    the male parent

    none of the choices

    both parent

  • Q7

    The DNA has a double – helical structure forming a twisted ladder. The backbone and steps of the ladder is composed of individual nucleotides bonded together. What important biological compounds that make up the backbone of the DNA molecule?

    pentose / 5-carbon sugar

    phosphate group

    nitrogen bases

    pentose and phosphate

  • Q8

    Bases in a DNA are complementary. Which is true of its complementary base if there are 35 Thymine in the DNA strand?

    only 25 Adenine, since a DNA is helical

    there will be 35 Guanine bases

    cannot be determined

    there will be 35 Adenine bases

  • Q9

    It is a non-Mendelian inheritance wherein traits are expressed independently like the coat color of cats.

    sex – linked

    multiple alleles

    incomplete dominance


  • Q10

    For blood types, if one parent is heterozygous A and the other parent is heterozygous B, what could be the possible blood types of children?

    A and O

    A, B, and O

    A, AB, B, and O

    A, AB, and A

  • Q11

    A heterozygous allele shows a phenotype that is intermediate of the two homozygous phenotypes being crossed. Neither allele is dominant over the other. Which Non-Mendelian pattern of inheritance is referred to?


    multiple Alleles

    incomplete dominance

    sex-Linked trait

  • Q12

    Tan colored birds are the result of the cross between a white (W) and a brown(B) colored birds. If the off springs are 50% tan and 50% white, what are the genotypes of their parents?

    BW x BW

    BW x WW

    BB x BB

    BB x WW

  • Q13

    Which one will not happen to population size when the environment nears the carrying capacity?

    death rate increases

    population size decreases

    population size remains stable

    reproductive rate increases

  • Q14

    Which factors naturally limits the growth of insects in a community?

    application of pesticides

    over collection

    slow rate of reproduction

    presence of insect eating animals


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