Which are true statements about gastrulation?Check All That ApplyIt establishes the basic body plan of the embryo.It establishes the basic body plan of the embryo.Four germ layers arise.Four germ layers arise.Three germ layers arise.Three germ layers arise.The pattern is variable between species.The pattern is variable between species.Yolk is not a major factor in establishing the pattern.Yolk is not a major factor in establishing the pattern.It involves changes in cell shape.It involves changes in cell shape.It involves cell movement.It involves cell movement.
Question
Which are true statements about gastrulation?Check All That ApplyIt establishes the basic body plan of the embryo.It establishes the basic body plan of the embryo.Four germ layers arise.Four germ layers arise.Three germ layers arise.Three germ layers arise.The pattern is variable between species.The pattern is variable between species.Yolk is not a major factor in establishing the pattern.Yolk is not a major factor in establishing the pattern.It involves changes in cell shape.It involves changes in cell shape.It involves cell movement.It involves cell movement.
Solution
The true statements about gastrulation are:
- It establishes the basic body plan of the embryo.
- Three germ layers arise.
- The pattern is variable between species.
- It involves changes in cell shape.
- It involves cell movement.
The statement that "Four germ layers arise" is not true because only three germ layers (ectoderm, mesoderm, and endoderm) arise during gastrulation.
The statement that "Yolk is not a major factor in establishing the pattern" is also not entirely true. The amount and distribution of yolk can influence the pattern of gastrulation, especially in egg-laying animals. However, in mammals where there is no yolk in the egg, other factors like cell signaling and gene expression play a more significant role in establishing the pattern.
Similar Questions
Which of the following statements concerning animal gastrulation is correct?Group of answer choicesCells from the blastomere cannot become mesodermal cells.Three germ layers are created; the endoderm, mesoderm and epidermis.The endoderm develops into the gut and lungs.The mesoderm develops into the muscles and nervous system.
Which of the following processes is affected by the amount of yolk present in an embryo?Multiple choice question.GastrulationMeiosisMitosisOrganogenesis
What animal embryonic structure is an indentation formed during gastrulation, evident in the gastrula stage?Question 9Select one:a.blastoporeb.blastocoelc.neural tubed.gastrula
How do cells of an embryo get inside during gastrulation?Multiple ChoiceCells crawl and change shape.The fertilization envelope punches in the blastopore.Muscle contractions of the uterus punch in the blastopore.Enzymes dissolve a hole in the blastocyst.
Which of the following is the second major event in animal development?Multiple choice question.GastrulationOrganogenesisCleavageFertilization
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