Which of the following is the latest stage of embryonic development (of this list)? blastula morula zygote 8 cell stage gastrula

In protostomes [Select] 7 cleavage occurs and it is [ Select ] In addition, in protostomes th v [Select ] determinate develops from the blastopore. radial anus spiral indeterminate mouth

Why is the presence of a coelom advantageous? it allows room for the development and movement of internal organs it allows for a third embryonic germ layer it is necessary for a complete digestive tract it permits the development of an open circulatory system

Aristotle classified all cold-blooded egg-laying tetrapod vertebrates as: the oviparous quadrupeds the malacostraca the cetaceans the malacia the birds

optiosn for 1:  -protostome -deuterostome    options for 2:  -an acoelomate -a coelomate  -a psuedocoelomate

Describe the development of the notochord. Include the terms primitive pit, notochordal process, notochordal canal, neurenteric canal, notochordal plate, ectoderm, mesoderm, and endoderm in your descriptions. Include labeled diagrams in your description. With respect to the developing notochord, where is the cloacal membrane, allantois, embryonic ectoderm, embryonic endoderm, and embryonic mesoderm with reference to the developing notochord.

Which of the following lack setae:(can be more than 1 nemerteans leeches earthworms polychaetes

The Cnidarian life-cycle varies from species to species. The species obelia is characterized by exclusively dominant medusa stage exclusively dominant polyp stage alternation between an asexual polyp form and sexual medusa form alternation between an asexual medusa form and sexual polyp form

Which of the following worms exhibits the greatest amount of cephalization? Turbellarians Flukes Tapeworms

Question 10 9. are found at the chalazal end of the embryo sac. Polar nuclei O Synergids Eggs Ovules O Antipodals