Photo AI
Phylum Arthropoda contains millions of species - Leaving Cert Agricultural Science - Question b - 2017
Question b
Phylum Arthropoda contains millions of species. Class Insecta (insects) is the class from this phylum with the greatest agricultural importance. (i) Outline the pri... show full transcript
Worked Solution & Example Answer:Phylum Arthropoda contains millions of species - Leaving Cert Agricultural Science - Question b - 2017
Step 1
Outline the principal structural features of insects.
Answer
Insects have several key structural features that define their classification:
- Exoskeleton: Insects possess an exoskeleton made of chitin, which provides structural support and protection.
- Body Segmentation: Insects are divided into three major body regions: the head, thorax, and abdomen.
- Legs: They typically have six legs which are jointed, allowing for a wide range of movement.
- Compound Eyes: Most insects have compound eyes that offer a wide field of vision.
- Antennae: Insects have pairs of antennae which are sensitive to touch and chemicals in the environment.
- Wings: Many insects have wings, which can be used for flight, though not all insects possess this feature.
Step 2
Name any two insect pests in agriculture and describe the damage they cause to named crops or animals.
Answer
-
Cabbage White Butterfly: The larvae (caterpillars) of the cabbage white butterfly feed on the leaves of cabbage plants, causing significant damage and reducing yields.
-
Green Bottle Fly: The larvae (maggots) of the green bottle fly can infest sheep, causing harm and leading to infections as they often burrow into the flesh of the animal.