Reproduction
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Reproduction. Of the plant variety. Reproduction. Has made the continuation of life possible Ensures the survival of the species 2 Types of reproduction: - Asexual : only need one living organism - Sexual: need a male and a female parent. Plants.

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Reproduction

Reproduction

Of the plant variety


Reproduction1

Reproduction

Has made the continuation of life possible

Ensures the survival of the species

2 Types of reproduction:

- Asexual : only need one living organism

- Sexual: need a male and a female parent


Plants

Plants

Plants can reproduce both sexually and asexually


Asexual reproduction in plants

Asexual reproduction in plants

Can reproduce from a part of their own organism (root, stem, or leaf)

Example: Strawberry plants, the trembling aspen forest


Sexual reproduction

Sexual reproduction

3 forms of sexual reproduction in plant kingdom

- flowers (flowering plants)/angiosperms (enclosed seed)

- cones (conifers)/gymnosperms (naked seed)

- spores (algae, mosses, ferns)

Seeds contain everything needed to create a new plant.

-Embryo (small immature plant)

- cotyledon (food reserves)

- seed coat (protective covering)


Reproduction

Stamen : Male parts

- anther: where pollen is produced and stored

-Pollen grains contain male gametes (spermatozoa)

Pistil : Female parts

- stigma: sticky surface which captures pollen grains

- ovary: swollen base that contains female gametes (ovules)

- ovules: female gametes


Pollination

Pollination

Two types:

- Self-pollination : pollen is transferred to the pistil of the same flower

-Cross-pollination : the wind and/or insects carry pollen to the pistil of a different flower


Fertilization

Fertilization

During fertilization the male and female gametes combine to form a zygote

A zygote is the cell containing complete genetic material


Animal reproduction

Animal Reproduction

  • Invertebrates = about 97% of all animal species

  • They reproduce either asexually or sexually

  • Vertebrates

  • - Most reproduce sexually


Sexual reproduction1

Sexual Reproduction

Male animals  produce male gametes (spermatozoa)

Female animals produce female gametes (ova)

Both the male/female gametes contain half of the genetic material of the future offspring.


Steps of vertebrate reproduction

Steps of vertebrate reproduction

1) male gamete fuses with female gamete

2) zygote is formed

3)zygote divides and transforms into embryo

4)embryo develops into small animal (baby)

5) baby animal becomes adult and produces their own gametes


Mating

Mating

During mating, two individuals of an animal speciesunite to combine their gametes to achieve fertilization


Fertilization1

Fertilization

Fertilization occurs when a spermatozoa and ovum combine


Types of fertilization

Types of fertilization

1) external : the gametes combine outside the bodies of both parents (fish)

2) internal : the gametes combine inside the female’s body


Hermaphrodites

Hermaphrodites

Equipped with both male and female reproductive parts.

(example : worms)


Reproduction

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