Heredity

    Cards (1812)

    • What happens to kangaroos during prolonged drought conditions?
      They stop breeding until rain triggers hormonal response.
    • What are eutherians also known as?
      Placental mammals.
    • Where does embryonic development occur in eutherians?
      Inside the uterus of the mother.
    • What develops after fertilised eggs implant into the uterine wall?
      A placenta connecting the young to nutrients.
    • What is the outcome of the placenta's function?
      It supplies nutrients and oxygen to the embryo.
    • What type of development do eutherians exhibit?
      Viviparous development.
    • How many young do placental mammals typically produce at a time?
      One to a few young.
    • What is the relationship between parental care and survival of young in eutherians?
      Increased parental care improves survival chances.
    • What are the differences between internal and external fertilisation?
      • Internal fertilisation occurs inside the female's body.
      • External fertilisation occurs in open water environments.
      • Internal fertilisation has a higher chance of fertilisation.
      • External fertilisation produces many gametes but has a lower success rate.
    • What is the main characteristic of external fertilisation?
      Occurs in open water environments.
    • Why do organisms with external fertilisation produce large numbers of gametes?
      To ensure successful fertilisation.
    • What is a key advantage of internal fertilisation?
      Higher chance of successful fertilisation.
    • In which environments does external fertilisation typically occur?
      Aquatic or moist terrestrial environments.
    • Which types of animals typically exhibit external fertilisation?
      Most invertebrates and some vertebrates.
    • Which types of animals typically exhibit internal fertilisation?
      Some invertebrates and most vertebrates.
    • What are the mechanisms that increase survival chances in species?
      • Nourishment for developing young.
      • Parental care of eggs and/or young.
    • What is the main process of sexual reproduction in plants?
      Fusion of male and female gametes.
    • Why is fertilisation more difficult for plants?
      Plants cannot move to facilitate gamete fusion.
    • What do plants rely on for gamete transfer?
      External agents like pollinators.
    • What is the role of pollinating agents in plants?
      To carry gametes from one parent to another.
    • What happens to advantageous features in flowers over time?
      They are selected by natural means.
    • What are the parts of a flower involved in reproduction?
      • Carpel (female parts)
      • Stamen (male parts)
      • Petals (non-sexual parts)
      • Sepals (protect unopened bud)
    • What is pollination in plants?
      Transfer of pollen to the stigma.
    • What occurs after pollen is deposited on the stigma?
      A pollen tube germinates and grows down the style.
    • Where does fertilisation occur in flowering plants?
      Inside the ovary.
    • What is the outcome of fertilisation in flowering plants?
      The ovule develops into a seed.
    • What happens to the ovary after fertilisation?
      It grows to become a fruit.
    • What are the differences between self-pollination and cross-pollination?
      • Self-pollination requires less energy.
      • Cross-pollination ensures greater variation.
      • Self-pollination occurs within the same plant.
      • Cross-pollination involves different plants.
    • What is the advantage of self-pollination for plants?
      Requires less energy and resources.
    • What is a disadvantage of cross-pollination?
      It requires energy to attract pollinators.
    • How do wind-pollinated flowers typically appear?
      Small, greenish, and odourless.
    • Why do wind-pollinated flowers produce large amounts of pollen?
      To compensate for inefficient pollination.
    • What adaptations do animal-pollinated flowers have?
      Bright colours and sweet nectar.
    • How do pollinators help flowering plants?
      They transfer pollen between flowers.
    • What is the relationship between flower adaptations and pollinators?
      Flowers adapt to attract specific pollinators.
    • Why does a one-to-one relationship between a plant and an animal species reduce wastage of pollen?
      It ensures pollen is deposited on the correct flower.
    • What do animals such as insects, birds, and mammals seek in flowers?
      A reward like nectar or pollen.
    • What is nectar?
      A sugary liquid secreted by flowers.
    • How do pollinators transfer pollen from one flower to another?
      Pollen rubs onto their bodies during their search.
    • What features of flowers attract pollinators?
      • Scent
      • Colour
      • Markings
      • Shape
      • Nectar
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