Study

9th grade midterm review

  •   0%
  •  0     0     0

      Back   Restart
  • The _______________ becomes the fruit after fertilization.
    anther
    ovule
    ovary
    filament
  • Rubber is an example of an _______________.
    magnet
    insulator
    conductor
    semiconductor
  • In which part of the flower are male gametes produced?
    Style
    Anther
    Sepal
    Ovule
  • Where are ovules found in a flower?
    Filament
    Style
    Anther
    Ovary
  • Which type of pollination involves two different plants of the same species?
    Self-pollination
    Cross-pollination
    Germination
    Wind pollination
  • What is the function of the stigma?
    Carries ovules
    Captures pollen
    Protects the seed
    Produces pollen
  • Materials like copper and silver have low electrical _______________.
    resistivity
    resistance
    voltage
    capacitance
  • Question
    Incorrect Answer 2
    Incorrect Answer 3
    Incorrect Answer 1
    Correct Answer
  • Female gametes in flowering plants are called _______________.
    pollen
    stigma
    petals
    ovules
  • Which part of the flower develops into a fruit?
    Anther
    Petal
    Seed
    Ovary
  • What is fertilization in flowering plants?
    Pollination of ovary
    Germination of the seed
    Fusion of male and female gametes to form a zygote
    The joining of two pollen grains
  • What best describes an insulator?
    It has tightly held electrons
    It’s made of metal
    It allows electricity to flow freely
    It has freely moving electrons
  • What is the name of the process that moves pollen from the anther to the stigma?
    Fertilization
    Germination
    Pollination
    Respiration
  • Male gametes in plants are found in the _______________.
    ovary
    filament
    anther
    petal
  • When a conductor is grounded, electrons move to or from the _____________.
    Earth
    wire
    battery
    sky
  • In electrostatics, what happens when a negatively charged balloon approaches a neutral object?
    Positive charges in the object are attracted toward the balloon
    Electrons in the object move away from the balloon
    The object becomes completely neutral
    No change occurs
  • What is cross-pollination?
    Pollen from the same flower
    Transfer of pollen between different plants
    Formation of fruit
    Fusion of gametes
  • In self-pollination, the pollen comes from the ___________ plant.
    nearby
    different
    same
    unknown
  • What structure develops into a fruit after fertilization?
    Ovule
    Sepal
    Ovary
    Style
  • The part of the flower that becomes the seed is the _______________.
    ovule
    petal
    style
    anther
  • Which of the following is NOT a good conductor of electricity?
    Graphite
    Iron
    Rubber
    Copper
  • What is self-pollination?
    Fusion of ovules
    Transfer of pollen within the same plant
    Pollen between different species
    Seed dispersal
  • Which part produces pollen?
    Stigma
    Ovule
    Anther
    Style
  • What is cross-pollination?
    Fusion of pollen and ovules
    Pollen transfer between two plants of the same species
    Self-pollination between different flowers
    Pollen transfer by bees only
  • After fertilization, the zygote forms a/an _______________.
    seed
    gamete
    embryo
    pollen grain
  • What happens to the zygote after fertilization in plants?
    It forms pollen
    It develops into a group of cells
    It dies
    It turns into fruit
  • Bright petals and sweet smells are features of _______________-pollinated flowers.
    bat
    wind
    bird
    insect
  • What is self-pollination?
    Pollen transfer by insects
    Pollen transfer within the same flower or plant
    Pollen from one species to another
    Asexual reproduction
  • What is the male gamete in plants?
    Seed
    Pollen grain
    Ovary
    Embryo
  • What happens when a conductor is grounded?
    It becomes permanently charged
    It balances charge by exchanging electrons with the Earth
    Electrons stop moving
    It explodes
  • What is grounding?
    Heating a conductor
    Balancing excess charge with the Earth
    Turning off electricity
    Generating power from air
  • What is one common trait of a wind-pollinated plant?
    Bright-colored petals
    Sticky stigma
    Large pollen grains
    Feathery stigma
  • What happens to the ovule and ovary after fertilization?
    Both turn into pollen
    Ovary becomes a leaf
    Ovule dies, ovary stays the same
    Ovule becomes seed, ovary becomes fruit
  • What is electrical resistivity?
    Flow rate of charge
    The measure of voltage
    A material’s resistance to electrical current
    A unit of power
  • Cross-pollination occurs between ___________ plants of the same species.
    identical
    different
    unrelated
    same
  • What is an insulator?
    Material that conducts electricity
    Material with tightly held electrons
    A wire
    A high-voltage material
  • A _____________ contains both male and female parts.
    stem
    seed
    leaf
    flower
  • Pollen grains in wind pollination are usually ___________ and light.
    small
    heavy
    sticky
    wet
  • What is the cause of paper being attracted to a charged balloon?
    Friction
    Electrostatic induction
    Magnetic force
    Gravity
  • Which is a feature of insect-pollinated flowers?
    Bright petals and scent
    Light pollen
    Feathery stigma
    Dull colors
  • Wind-pollinated flowers often have _______________ petals.
    bright
    small / dull-colored
    colorful
    fragrant
  • Electrostatic attraction occurs due to opposite _______________.
    charges
    forces
    ions
    currents
  • Why is wind pollination often successful?
    Pollinators are always nearby
    Pollen grains are large and heavy
    Exposed anthers and feathery stigmas help catch wind-blown pollen
    Flowers have sweet smells
  • Why are metals good conductors?
    They have no electrons
    Their electrons are tightly bound
    Their electrons move freely
    They resist charge transfer
  • What is the unit of electrical resistivity?
    Amperes
    Ω·m
    Volts
    Watts
  • What is a conductor?
    Material that allows electrons to move freely
    Material that blocks current
    A magnetic wire
    A power source
  • What are male reproductive cells in flowering plants called?
    Ovules
    Petals
    Sepals
    Pollen grains
  • Why is silver rarely used in household wiring despite low resistivity?
    It tarnishes and is expensive
    It is very cheap
    It has high resistance
    It is radioactive
  • A _______________ stigma helps catch pollen carried by the wind.
    flat
    sticky
    feathery
    wet
  • Which is a feature of wind-pollinated flowers?
    Heavy seeds
    Sticky stigma and nectar
    Bright petals and scent
    Feathery stigma and light pollen
  • The _______________ controls the entry of pollen to the ovary.
    style
    petal
    anther
    filament
  • Why is copper used in electrical wiring?
    It’s a good conductor, cheap, and durable
    It is magnetic
    It glows under voltage
    It has high resistance
  • Pollen grains are produced at the _______________.
    anther
    stigma
    petal
    ovary
  • How does a charged object attract neutral paper?
    By magnetic force
    By electrostatic induction
    Through gravity
    By friction
  • What is the group of cells called that forms from the zygote?
    Seed
    Embryo
    Ovule
    Gamete
  • What structure develops into a seed after fertilization?
    Petal
    Filament
    Ovule
    Anther
  • How does grounding work in electrostatics?
    Excess electrons move to or from the Earth
    It discharges batteries
    It creates a spark
    It makes objects magnetic
  • The transfer of pollen grains from an anther to a stigma is called _______________.
    fertilization
    pollination
    germination
    dispersion
  • In self-pollination, pollen moves:
    From an animal to the flower
    From one plant to another of a different species
    Only through wind
    From the anther to the stigma of the same flower or plant
  • Which part of the flower develops into a seed?
    Filament
    Stigma
    Ovule
    Petal
  • Conductors allow electrons to move _______________.
    freely
    randomly
    backward
    in circles
    • Your experience on this site will be improved by allowing cookies.