Mr. Morales is teaching a lesson on classification. He says that spiders are classified as a different group than insects because they have eight legs instead of six legs. He explains that spiders evolved first. Mr. Morales also says that having eight legs is the derived trait that separates the two groups. Antonio thinks Mr. Morales is wrong. Which piece of information is Antonio considering?
Answers
Answer:
Spiders and insects both are in the kingdom animalia.
They are also the part of Phylum Arthropoda.
But we don't put spiders and insects together because there are many differences between the both classes . some of them are as follows-
- Insect is a class of Arthropoda while spiders have those own class which is Arachnida.
- Another reason for being separated is that the spiders are air breathig Arthropods.
- Spiders are Venous and they can inject Venom in their prey .
4. They have eight leg and chelicerae with fang.
5. Insects have jointed legs while spiders don't.
These could be the piece of Information Antonio considering .
Answer:
The "piece of information" that Antonio is considering is that spiders having eight legs is the derived trait that separates the two groups.
Explanation:
1. Spiders are a group of insects belonging to "Class Arachnida" of Phylum Arthropoda.
2. The main characteristic of this Phylum being the possession of 3 pairs of jointed appendages, hence the name Arthropoda.
3. Their "body" is divided into "head, thorax and abdomen".
4. Spiders have "4 pairs of jointed legs" unlike the 3 pairs of other insects.
5. They also lack antenna and wings like other insects.
6. However, Antonio doubts that spiders have eight legs is the derived trait that separates the two groups.