D) alternate between a polyp and a medusa during their life cycle E) none of the above. blastopore, the opening by which the cavity of the gastrula, an embryonic stage in animal development, communicates with the exterior. Most Cnidarians A) exist only as medusa in their life cycle 8) exist only as polyps in their life cycle C) encyst when they encounter adverse environmental conditions. A Characteristic of hominids is A) larger brain B) blpedalism C) nighttime activity D) monogamy E) both A and B 36. E) give birth to live young rather than lay eggs 35. The monotremes are classified as mammals because they A) are endoderms B) are carnivores C) are omnivores D) have mammary glands. D) control Its buoyancy in water C) tolerate changes in water pressure 34. A swim bladder allows a fish to A) regulate its water content in seawater B) regulate its salt content in seawater C) regulate its salt content in freshwater. The haploid stage in a plant life cycle is called A) zygote B) embryo C) gametophyte D) sporophyte E) conspicuous stage 33. Water conservation in plants is assisted by A) the cuticle B) transpiration C) stomata D) clia E) both A and C 32. Which of the following is an example of osmosis? A) flow of waier out of a cel B) pumping of water into a cell C) flow of water between cells D) both A and B E) both A and C 31. Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Transcribed image text: 29 Which of the following is descriptive of protostomes? A) spiral and indeierminate cleavage, blastopore becomes mouth, schizococlous development B) spiral and determinate cleavage, biastopore becomes mouth, schizocoelous development C) spiral and deterninase cleavage, blassopore becomes anus, enteroccelous development D) radial and delerminae cleavage, bisstopore becomes anus,enierocoelous developmert E) radial and determinate cleavage, blastopore becomes mouth, schizocvelous 30.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. In the protostome line the blastopore becomes the how to#COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.From tech to household and wellness products. Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.This Time in History In these videos, find out what happened this month (or any month!) in history.set of regulatory genes that are present in the genome of all animals. #WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find. in protostomes the blastopore becomes the.The fifth cleavage of the fertilized egg of frog results in the formation of. Frog is the deuterostome and hence, the blastopore becomes the anus. In deuterostome, the blastopore becomes the anus. Demystified Videos In Demystified, Britannica has all the answers to your burning questions. In protostome, the blastopore becomes the mouth.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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