![]() ![]() ![]() During gastrulation, the archenteron develops into the digestive tube (primitive gut), with blastopore becoming either anus or mouth depending on the organism. During gastrulation, deuterostome embryos' anus is given first by the blastopore while the mouth is formed secondarily, and vice versa for the protostomes In both deuterostomes and protostomes, a zygote first develops into a hollow ball of cells, called a blastula. In deuterostomes, gastrulation occurs at the vegetal pole, and the blastopore becomes the opening to the posterior anus the mouth forms separately within the anterior/ventral territory. Range of thermoneutral D Range of tolerance Performance $ GR RG Environmental gradientemperature) Invertebrates 37 Which of the following is correctly associated with sponges? A Amoebocytes B True tissues Blastocoel D. Both the archenteron and blastopore are formed during the gastrulation stage of embryonic development. the mouth forms from the second embryonic opening, not from the blastopore E. What ecological concept is represented in the diagram to the right? 5 Survival G-Growth Reproduction Optimal A Thermoneutral zone B. the coelom forms from mesodermal outpocketings of the gut C. Anus develops from the blastopore Both B and D 36. Spiral arrangement of cells B.Radial arrangement of cells C. You are looking at a frog egg undergoing early cleavage What would you expect to see? A. After gastrulation, if the first opening, the blastopore becomes the mouth, the animal is. Which of the following organisms would have the highest surface-to-volume ratio? A. Formation of the mouth and anus in invertebrate embryos 1. blastopore becomes anus, radial and indeterminate cleavage 34. In amphistomy, the blastopore elongates and closes laterally with both ends giving rise to the mouth and anus. The mouth is formed at a different site from the former blastopore in the anterior of the embryo. blastopore becomes mouth, radial and indeterminate cleavage oblastopore becomes mouth spiral and determinate cleavage D. In deuterostomy the blastopore stays at the posterior site of the embryo and either closes or gives rise to the anus. Blastopore becomes the anus - Include vertebrates. blastopore becomes anus, spiral and indeterminate cleavage B. if the first opening, or blastopore, becomes the mouth, the organism is said to be a. Which of the following is descriptive of protostome? A. ![]()
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