Question

Установите последовательность образования осевого комплекса органов у хордовых животных А) Нервная трубка погружается под эктодерму, формируя зачаток центральной нервной системы Б) клетки хорды выделяют вещество, стимулирующее клетки эктодермы В) справа и слева от хорды возникает мезодерма Г) в энтодерме образуется зачаток хорды Д) Нервная трубка, хорда и мезодерма образуют осевой комплекс, определяющий симметрию организма Е) клетки эктодермы образуют валик, который превращается в нервную трубку

Answer 1

Г-Б-Е-В-А-Д но я не уверена куда деть В...

Answer 2

Sequence of Formation of the Axial Complex in Chordate Animals

Chordate animals go through a specific sequence of organ formation, leading to the development of the axial complex. Here's the sequence of events:

A) Nervous tube submerges under the ectoderm, forming the rudiment of the central nervous system. - The formation of the nervous tube submerging under the ectoderm is a crucial step in the development of the central nervous system.

B) Chord cells secrete a substance that stimulates the cells of the ectoderm. - The secretion of a substance by chord cells that stimulates the ectoderm cells is an important part of the developmental process.

C) Mesoderm forms on the right and left sides of the chord. - The emergence of mesoderm on both sides of the chord is a significant event in the formation of the axial complex.

D) Nervous tube, chord, and mesoderm form the axial complex, determining the organism's symmetry. - The collaboration of the nervous tube, chord, and mesoderm in forming the axial complex is crucial for determining the symmetry of the organism.

E) Ectoderm cells form a fold that transforms into the nervous tube. - The transformation of the ectoderm cells into a fold, which eventually becomes the nervous tube, is a key developmental process in the formation of the axial complex.

This sequence outlines the step-by-step process of the formation of the axial complex in chordate animals.

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