Asexual Reproduction in Plants and Animals

Asexual Reproduction Methods in Plants and Animals

Budding

• Some unicellular organisms, like yeast, reproduce asexually through budding.
• The parent cell develops an outgrowth of cytoplasm called a bud.
• When the bud grows nearly as big as the parent cell, the parent's nucleus is copied and divides into two.
• One nucleus moves into the bud, which breaks off to form a new cell.
• Sometimes, a chain of budded cells forms when new buds develop their own buds before breaking off.

Hydra: Budding Example in Multicellular Organisms

• Hydra, a simple multicellular animal in freshwater, reproduces by budding.
• Hydra's body consists of two cell layers:
  • Ectoderm (outer layer): Cells with various functions.
  • Endoderm (inner layer): Cells for food digestion.
• Hydra can produce buds on the side of its body (see Figure 2.2.2).

Vegetative Reproduction

• Asexual reproduction in flowering plants is called vegetative reproduction.
• One or more new plants may grow from a part of the parent plant, such as the root, stem, or leaves.
• This can happen naturally or artificially to produce or propagate new plants.
• Example: A potato will produce a new shoot in favorable conditions.

Natural Vegetative Reproduction

• When a plant reproduces naturally by vegetative reproduction, it may develop a storage organ from a stem or root.
• The storage organ stores food.
• If growing conditions become unfavorable, the parent plant may die, but the storage organ will remain.
• When conditions improve, a new plant will grow from the storage organ using the stored food.
• Examples of storage organs: corms, bulbs, and rhizomes.