Jama'Atu College of Education (JACE), Kaduna Kaduna, Kaduna State, 2019/2020 HND - Kaduna
Monday, 12 August 2019
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Jama'Atu College of Education (JACE), Kaduna Kaduna, Kaduna State, 2019/2020 HND FORM AND PART-TIME FORM IS OUT CALL 08032266635 ND POST-UTME FORM is also on sale Call the Admin Office for Registration...
The embryos of all arthropods are segmented, built from a series of repeated modules. The last common ancestor of living arthropods probably consisted of a series of undifferentiated segments, each with a pair of appendages that functioned as limbs. However, all known living and fossil arthropods have grouped segments into tagmata in which segments and their limbs are specialized in various ways.[11]
The three-part appearance of many insect bodies and the two-part appearance of spiders is a result of this grouping;[14] in fact there are no external signs of segmentation in mites.[11] Arthropods also have two body elements that are not part of this serially repeated pattern of segments, an acron at the front, ahead of the mouth, and a telson at the rear, behind the anus. The eyes are mounted on the acron.[11]
The embryos of all arthropods are segmented, built from a series of repeated modules. The last common ancestor of living arthropods probably consisted of a series of undifferentiated segments, each with a pair of appendages that functioned as limbs. However, all known living and fossil arthropods have grouped segments into tagmata in which segments and their limbs are specialized in various ways.[11]
The three-part appearance of many insect bodies and the two-part appearance of spiders is a result of this grouping;[14] in fact there are no external signs of segmentation in mites.[11] Arthropods also have two body elements that are not part of this serially repeated pattern of segments, an acron at the front, ahead of the mouth, and a telson at the rear, behind the anus. The eyes are mounted on the acron.[11]
