BIO 101: General Biology I - Reproduction

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Questions and Answers

What are the male reproductive parts of a flower called?

  • Pistil
  • Stigma
  • Gynoecium
  • Androecium (correct)

Which part of the pistil is responsible for receiving pollen?

  • Filament
  • Ovary
  • Stigma (correct)
  • Style

In which type of flowers are both male and female reproductive parts present?

  • Bisexual flowers (correct)
  • Gymnosperms
  • Unisexual flowers
  • Staminate flowers

What is the primary function of the ovary in a flower?

<p>To hold seeds (C)</p> Signup and view all the answers

Which of the following helps in the process of pollination?

<p>Wind (B)</p> Signup and view all the answers

What does the term 'gynoecium' refer to in a flower?

<p>The female part (C)</p> Signup and view all the answers

What is the role of pollen grains in the reproductive process of flowering plants?

<p>To contain male sex cells (C)</p> Signup and view all the answers

Which component of the flower serves as the base structure for the stamen?

<p>Filament (D)</p> Signup and view all the answers

What process involves the body of an organism breaking into pieces that each grow into individual offspring?

<p>Fragmentation (B)</p> Signup and view all the answers

Which of the following is a form of asexual reproduction where the egg develops without fertilization?

<p>Parthenogenesis (C)</p> Signup and view all the answers

In vegetative propagation, which part of the plant can produce new individuals?

<p>Roots, stems, and leaves (B)</p> Signup and view all the answers

What type of vegetative propagation involves a piece of branch being cut and embedded in the soil?

<p>Cutting (B)</p> Signup and view all the answers

Which of the following is NOT a natural method of vegetative propagation?

<p>Mitosis (B)</p> Signup and view all the answers

Which specialized structure is involved in vegetative propagation through tubers?

<p>Potatoes (B)</p> Signup and view all the answers

What is the main benefit of artificial propagation methods?

<p>To multiply desired plants efficiently (A)</p> Signup and view all the answers

In which form of asexual reproduction are haploid males produced by ants and bees?

<p>Parthenogenesis (D)</p> Signup and view all the answers

What is the process called when a sperm and ovum fuse to form a new individual?

<p>Fertilization (B)</p> Signup and view all the answers

Which reproductive method is characterized by offspring being directly born instead of hatching from eggs?

<p>Viviparity (A)</p> Signup and view all the answers

What type of fertilization occurs outside the female's body?

<p>External fertilization (B)</p> Signup and view all the answers

What is produced by the ovaries in female reproductive organs?

<p>Eggs (ova) (A)</p> Signup and view all the answers

Which of the following is NOT a type of internal fertilization?

<p>External fertilization (A)</p> Signup and view all the answers

Which reproductive process is predominantly observed in lower organisms and unicellular microbes?

<p>Asexual reproduction (A)</p> Signup and view all the answers

What is the initial step in the process of reproduction?

<p>Fertilization (B)</p> Signup and view all the answers

What is formed after the nuclei of the sperm and egg fuse?

<p>Zygote (B), Fertilized egg (D)</p> Signup and view all the answers

What is a defining characteristic of reproduction in organisms?

<p>It is essential for the continuance of their species. (D)</p> Signup and view all the answers

Which of the following is an example of asexual reproduction?

<p>Binary fission in bacteria. (A)</p> Signup and view all the answers

How does budding occur in organisms like yeast?

<p>A part of the parent cell forms a new individual and remains attached. (B)</p> Signup and view all the answers

What method of asexual reproduction is common in sponges and hydra?

<p>Budding (B)</p> Signup and view all the answers

In the process of spore formation, which organisms typically produce spores?

<p>Certain algae and fungi. (C)</p> Signup and view all the answers

What is the main difference between asexual and sexual reproduction?

<p>Asexual reproduction results in offspring from a single organism. (A)</p> Signup and view all the answers

What occurs during binary fission in an amoeba?

<p>The organism divides into two identical cells. (A)</p> Signup and view all the answers

Which statement about gametes is true regarding sexual reproduction?

<p>Both male and female gametes fuse to initiate a new individual. (C)</p> Signup and view all the answers

What is self-pollination?

<p>Pollen from one flower falls on its own stigma (A)</p> Signup and view all the answers

Which of the following best describes cross-pollination?

<p>Pollen from one plant fertilizes another flower of the same species (A)</p> Signup and view all the answers

What role do pollinators play in fertilization?

<p>They help transfer pollen from one flower to another (C)</p> Signup and view all the answers

In viviparous animals, how does development occur?

<p>Inside the mother's womb (A)</p> Signup and view all the answers

What term describes animals that lay eggs?

<p>Oviparous (B)</p> Signup and view all the answers

Which type of reproduction involves only one parent?

<p>Asexual reproduction (B)</p> Signup and view all the answers

Which of the following statements is true about hermaphrodites?

<p>They have both female and male sex organs in the same individual (A)</p> Signup and view all the answers

What is the process called when seeds are carried away from the parent plant?

<p>Dispersal (A)</p> Signup and view all the answers

Flashcards

Reproduction

The process by which organisms create offspring of the same kind.

Asexual Reproduction

A single individual creates offspring without the involvement of another individual.

Sexual Reproduction

Two individuals contribute genetic material to create offspring.

Binary Fission

A single-celled organism divides into two identical daughter cells.

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Budding

A new organism grows from a bud that forms on the parent's body.

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Spore Formation

Specialized cells called spores are released from the parent organism, capable of developing into new individuals.

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Reproduction in Flowering Plants

The process of plant reproduction involving flowers, pollination, fertilization, and the development of seeds and fruits.

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Reproduction in Animals

The range of reproductive processes in animals, often involving specialized sex organs and mating behaviors.

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Spores

Single-celled units released by parent plants that develop into new individuals.

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Vegetative Propagation

A form of asexual reproduction in plants where new plants arise from vegetative parts like roots, stems, or leaves.

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Root Propagation

A type of vegetative propagation where new plants grow from adventitious roots.

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Stem Propagation

A type of vegetative propagation where new plants grow from stems.

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Runners

A type of stem propagation where a horizontal stem grows along the ground, producing new plants at nodes.

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Suckers

A type of stem propagation where shoots arise from the base of the main stem.

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Bulbs

A type of stem propagation where a swollen underground stem stores food.

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Tubers

A type of stem propagation where an underground stem stores food and buds.

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Pollination

The transfer of pollen from the anther of a flower to the stigma.

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Self-pollination

Pollination where pollen from a flower falls on its own stigma, leading to fertilization.

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Cross-pollination

Pollination where pollen from one flower falls on the stigma of another flower of the same species.

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Fertilization in plants

The fusion of the pollen and ovule nuclei, leading to seed development.

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Oviparous

Animals that lay eggs.

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Viviparous

Animals that give birth to live young.

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Hermaphrodite

Animals that have both male and female reproductive organs.

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Sexual reproduction in plants

The fusion of male and female gametes to produce a zygote, which then develops into a new plant.

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Stamen (Androecium)

The male reproductive organ of a flower, responsible for producing pollen grains.

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Pistil (Gynoecium)

The female reproductive organ of a flower, consisting of the stigma, style, and ovary, which contains the ovules.

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Anther

The part of the stamen that produces pollen grains.

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Stigma

The sticky part of the pistil that receives pollen grains.

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Fertilization

The fusion of the male gamete (pollen) with the female gamete (ovule) to form a zygote.

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Bisexual flowers

Flowers that contain both male (stamen) and female (pistil) reproductive parts.

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Reproductive Organs (Male & Female)

The male reproductive organs produce sperm, while the female reproductive organs produce eggs.

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Internal Fertilization

Fertilization that occurs inside the body of the female.

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External Fertilization

Fertilization that occurs outside the body of the female.

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Asexual Reproduction in Animals

A type of reproduction that occurs mainly in lower organisms. It involves a single parent without gamete formation.

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Oviparity

Fertilized eggs are laid outside, and the developing embryo receives nourishment from the yolk.

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Ovoviviparity

Fertilized eggs are retained inside the female's body, receiving nourishment from the yolk. Eggs are laid just before hatching.

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Study Notes

BIO 101: General Biology I - Study Notes

  • Course Instructors:
    • Dr. Oladosu O.O. (Course Coordinator) - 08034049078
    • Dr. Popoola J.O. - 08064640018
    • Dr. Aromolaran O. - 08062225745
    • Dr. Omotayo O.E. - 08023799838

Reproduction

  • Definition: Reproduction is the biological process where organisms create offspring.
  • Types:
    • Asexual: Reproduction involving one parent, producing genetically identical offspring.
    • Sexual: Reproduction involving two parents, creating offspring with genetic variation.

Asexual Reproduction

  • Lower Organisms:
    • Binary Fission: A cell dividing into two individuals, losing its original identity (e.g., amoeba, bacteria).
    • Budding: A bud forms on the parent organism, developing into a new individual which then detaches (e.g., yeast, hydra).
    • Spore Formation: Spores are produced and develop into new individuals (e.g., Chlamydomonas, fungi, moss, ferns).
  • Additional Asexual Reproduction Methods:
    • Fragmentation: An organism breaks into pieces, and each develops into a new organism (e.g., planaria, starfish).
    • Parthenogenesis: Development of an egg without fertilization, creating a new organism (e.g., bees, wasps, ants, some vertebrates).

Asexual Reproduction in Plants (Vegetative Propagation)

  • Natural Methods:
    • Roots: Adventitious roots, giving rise to new plants (e.g., sweet potato, Dahlia).
    • Stems: Runners, suckers, bulbs, tubers, rhizomes (e.g., grass runners, Chrysanthemum, onion, potato, ginger).
    • Leaves: Adventitious buds (e.g., Bryophyllum).
  • Artificial Methods:
    • Cuttings: A piece of stem/root inserted in the soil to produce new roots.
    • Layering: A stem part is buried in the soil, allowed to root, and then separated.
    • Other methods (e.g., grafting).

Sexual Reproduction in Plants

  • Flowers: The reproductive organ of flowering plants, containing both male (stamen) and female (pistil) parts.
  • Pollination: Transfer of pollen grains from the anther to the stigma.
    • Self-pollination: Pollen from the same flower.
    • Cross-pollination: Pollen from a different flower.
  • Fertilization: Fusion of pollen and ovule, forming a zygote.

Sexual Reproduction in Animals

  • Reproductive Organs: Male (testes, sperm ducts, penis) and female (ovaries, oviducts, uterus).
  • Fertilization: Fusion of sperm and ovum.
    • Internal Fertilization: Fertilization occurs inside the female body.
    • External Fertilization: Fertilization occurs outside the female body.
  • Types of development after Internal Fertilization:
    • Oviparity: Fertilized eggs laid outside the body.
    • Ovoviviparity: Fertilized eggs develop inside the mother and hatch outside.
    • Viviparity: Developing embryos stay inside the mother and are nourished by her before birth.

Asexual Reproduction in Animals

  • A process where a single organism divides to create more organisms. These organisms are identical to the original.
  • Types: Binary fission, budding, fragmentation, regeneration, and parthenogenesis.

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