-Sided Allack on the spiny Cactus The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cacti shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps Spiny Cactus Organism Collared peccary (musk hog) 300- Parasitic wasp 200 Collared peccaries and parasitic wasps are two organisms that were introduced to the ecosystem in which the spiny cactus population lives. The chart describes the relationship between the spiny cact and these two organisms 100 LULU 70 80 90 100 110 120 130 Number of Spines Organisms Introduced into the Ecosystem Relationship with Spiny Cactus Plants They eat spiny cactus plants that have a small number of spines. They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus and eat the inner pulp of the plant, usually destroying the plant. These wasps lay eggs on spiny cactus plants that have a large number of spines. The number of cacti with 70 spines will spines will due to due to The number of cacti with 100 spines will due to The number of cacti with 130

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The Two-Sided Attack on the Spiny Cactus

The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cacti shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps.

[Graph Description]
- **X-axis**: Number of Spines
- **Y-axis**: Number of Cacti
- The graph has a bell-shaped curve peaking at around 95 spines, with the number of cacti declining on either side. There are fewer cacti with either very few or very many spines.

[Image: Illustration of a Spiny Cactus]

Collared peccaries and parasitic wasps are two organisms that were introduced to the ecosystem in which the spiny cactus population lives. The chart describes the relationship between the spiny cacti and these two organisms.

[Chart]
- **Organism**: Collared peccary (musk hog)
  - **Relationship with Spiny Cactus Plants**: They eat spiny cactus plants that have a small number of spines.
  
- **Organism**: Parasitic wasp
  - **Relationship with Spiny Cactus Plants**: They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus and eat the inner pulp of the plant, usually destroying the plant. These wasps lay eggs on spiny cactus plants that have a large number of spines.

There are fill-in-the-blank statements to evaluate the effects on cactus populations:
- The number of cacti with 70 spines will [increase/decrease/stay the same] due to [collared peccaries/parasitic wasps].
- The number of cacti with 100 spines will [increase/decrease/stay the same] due to [collared peccaries/parasitic wasps].
- The number of cacti with 130 spines will [increase/decrease/stay the same] due to [collared peccaries/parasitic wasps].
Transcribed Image Text:The Two-Sided Attack on the Spiny Cactus The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cacti shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps. [Graph Description] - **X-axis**: Number of Spines - **Y-axis**: Number of Cacti - The graph has a bell-shaped curve peaking at around 95 spines, with the number of cacti declining on either side. There are fewer cacti with either very few or very many spines. [Image: Illustration of a Spiny Cactus] Collared peccaries and parasitic wasps are two organisms that were introduced to the ecosystem in which the spiny cactus population lives. The chart describes the relationship between the spiny cacti and these two organisms. [Chart] - **Organism**: Collared peccary (musk hog) - **Relationship with Spiny Cactus Plants**: They eat spiny cactus plants that have a small number of spines. - **Organism**: Parasitic wasp - **Relationship with Spiny Cactus Plants**: They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus and eat the inner pulp of the plant, usually destroying the plant. These wasps lay eggs on spiny cactus plants that have a large number of spines. There are fill-in-the-blank statements to evaluate the effects on cactus populations: - The number of cacti with 70 spines will [increase/decrease/stay the same] due to [collared peccaries/parasitic wasps]. - The number of cacti with 100 spines will [increase/decrease/stay the same] due to [collared peccaries/parasitic wasps]. - The number of cacti with 130 spines will [increase/decrease/stay the same] due to [collared peccaries/parasitic wasps].
**The Two-Sided Attack on the Spiny Cactus**

The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cacti shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps.

**Graph Description:**

- **Y-axis:** Number of Cacti
- **X-axis:** Number of Spines

The graph illustrates a distribution with a peak around 90 to 110 spines. The number of cacti decreases as the number of spines moves away from this central range.

**Organisms Introduced into the Ecosystem:**

| Organism          | Relationship with Spiny Cactus Plants                                                                              |
|-------------------|-------------------------------------------------------------------------------------------------------------------|
| Collared peccary (musk hog) | They eat spiny cactus plants that have a small number of spines.                                           |
| Parasitic wasp    | They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus and eat the inner pulp of the plant, visually destroying the plant. These wasps lay eggs on spiny cacti plants that have a large number of spines. |

**Analysis Task:**

- The number of cacti with 70 spines will [increase/decrease] due to [peccaries/wasps].
- The number of cacti with 100 spines will [increase/decrease] due to [peccaries/wasps].
- The number of cacti with 130 spines will [increase/decrease] due to [peccaries/wasps].

This study helps understand the impact of species introduction on cactus populations, indicating a balance influenced by predation and parasitism.
Transcribed Image Text:**The Two-Sided Attack on the Spiny Cactus** The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cacti shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps. **Graph Description:** - **Y-axis:** Number of Cacti - **X-axis:** Number of Spines The graph illustrates a distribution with a peak around 90 to 110 spines. The number of cacti decreases as the number of spines moves away from this central range. **Organisms Introduced into the Ecosystem:** | Organism | Relationship with Spiny Cactus Plants | |-------------------|-------------------------------------------------------------------------------------------------------------------| | Collared peccary (musk hog) | They eat spiny cactus plants that have a small number of spines. | | Parasitic wasp | They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus and eat the inner pulp of the plant, visually destroying the plant. These wasps lay eggs on spiny cacti plants that have a large number of spines. | **Analysis Task:** - The number of cacti with 70 spines will [increase/decrease] due to [peccaries/wasps]. - The number of cacti with 100 spines will [increase/decrease] due to [peccaries/wasps]. - The number of cacti with 130 spines will [increase/decrease] due to [peccaries/wasps]. This study helps understand the impact of species introduction on cactus populations, indicating a balance influenced by predation and parasitism.
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