Describe sequentially the early development of animals, using and defining all of the following terms: fertilization, zygote, cleavage, blastula, blastopore, gastrulation, cell differentiation, organogenesis, and morphogenesis. Write in paragraph format, at least 7-10 complete sentences, in your own words. Copying and pasting from any other source will receive a score of zero. Type your answer Question 22 -20 Write in paragraph format (7-10 complete sentences) an essay explaining the difference between “secondary loss” and independent evolution of traits. Give at least one example of each within the Kingdom Animalia, including evidence supporting the hypothesis that the trait has been lost or evolved independently. Type your answer Question 23 -/10 Monotremes include the duck-billed platypus and the spiny echidna, both of which are mammals, but lay eggs. Explain why these animals are considered mammals, and give a possible explanation of why there are not more egg-laying mammals. Write in your own words. Copying from any source will receive no points.

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