FREE! - Seed Dispersal Worksheet - Science Resource - Twinkl - Free Printable

Problem Overview:

The worksheet asks you to identify how different seeds are dispersed and to describe how an apple seed could be dispersed by water. This involves understanding the mechanisms of seed dispersal, which include wind, animals, water, and gravity.

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Solution:

#### Step 1: Identify how each seed is dispersed
We need to analyze the images provided for each seed type and determine the primary method of dispersal.

1. Sycamore:
- Sycamore seeds have a wing-like structure (similar to a maple seed).
- These seeds are adapted for wind dispersal because the wings catch the wind and carry the seed away from the parent plant.

2. Poppy:
- Poppies produce small, lightweight seeds.
- These seeds are often dispersed by gravity when the pod dries out and splits open, allowing the seeds to fall to the ground or be carried by the wind.

3. Burdock:
- Burdock seeds have hooks or spines that attach to fur or clothing.
- These seeds are primarily dispersed by animals as they hitch a ride on passing creatures.

4. Berries:
- Berries are typically eaten by birds or other animals.
- The seeds pass through the animal's digestive system and are excreted elsewhere, leading to animal dispersal.

5. Coconut:
- Coconuts are buoyant and can float in water.
- They are primarily dispersed by water, traveling long distances before washing up on shorelines.

6. Acer (Maple):
- Maple seeds also have wing-like structures similar to sycamore seeds.
- These seeds are adapted for wind dispersal due to their aerodynamic shape.

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#### Step 2: Describe how an apple seed could be dispersed by water
Apples are typically dispersed by animals (e.g., birds or mammals) eating the fruit and excreting the seeds elsewhere. However, if an apple falls into water, it can also be dispersed by water. Here’s how:

- Apple Fruit: When an apple falls into water, it may float for a short time.
- Decay Process: Over time, the apple will decompose, and the seeds inside may become exposed.
- Seed Buoyancy: Apple seeds are relatively light and can sometimes float or be carried by currents.
- Dispersal: The seeds may eventually sink or wash ashore, where they can germinate under favorable conditions.

Thus, while apples are not primarily adapted for water dispersal, they can still be transported by water in certain circumstances.

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Final Answer:

1. Sycamore: Wind
2. Poppy: Gravity/Wind
3. Burdock: Animals
4. Berries: Animals
5. Coconut: Water
6. Acer (Maple): Wind

How an apple seed could be dispersed by water:
When an apple falls into water, it may float briefly. As the fruit decays, the seeds can be exposed and carried by water currents. Eventually, the seeds may wash ashore or sink, where they can germinate if conditions are suitable.

Boxed Final Answer:
\[
\boxed{
\begin{aligned}
&\text{Sycamore: Wind} \\
&\text{Poppy: Gravity/Wind} \\
&\text{Burdock: Animals} \\
&\text{Berries: Animals} \\
&\text{Coconut: Water} \\
&\text{Acer (Maple): Wind} \\
&\text{Apple Seed Dispersal by Water: Seeds can float or be carried by water currents after the fruit decays.}
\end{aligned}
}
\]