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Fourth: Classifying arthropods according to the number of legs:

Arthropods are invertebrate animals that characterized by a type of legs known as jointed legs. Arthropods can be classified according to the number of these legs. Activity

3 (Classifying arthropods animals according to the number of legs)

Fly

Worker bee

Ant

Spider

Scorpion

Julius

Examine the samples shown above. They are a group of arthropods. Classify them into groups based on the number of legs in each group. Record the results in the following table.

Arthropods

Number of legs

Fly/ bee/ ant

.........................

Spider/ scorpion

.........................

Scolopendra/ Julius

.........................

• Conclusion: Arthropods can be classified according to the number of legs into: 1. Insects: have three pairs of joint legs such as locusts, bees, flies, and cockroaches. 2. Arachnids: have four pairs of joint legs such as the spider and scorpion. 3. Myriapods: such as scolopendra and Julius. First Term

Zamzam Presses

73

Science book prep 1 first term  

science

Science book prep 1 first term  

science

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