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Predict what would happen if Ca2+ was injected into an unfertilized sea urchin egg.
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- Using a concept map, discuss how reproduction takes place in animals. (Include the modes, sexual and asexual; and fertilization)Describe the process of germ cells migration in mammals.Which refers to the process where animal reproduce asexually and sexually to ensure perpatuation and survival of this species ?
- Which mechanism prevents an ovum from being fertilized by multiple sperm cells? A. Once a sperm penetrates the jelly-like coating of the egg, no other sperm cell can penetrate the coating. B. When a sperm fuses with the plasma membrane of the egg, depolarization of the membrane occurs. C. The egg can survive in the Fallopian tube for 24 hours s it does not have mitochondria to produce energy. D. When more than a single sperm cell fuses with the plasma membrane, multiple zygotes can form, leading to the twin or triplets.In flatworms, flame cells are involved in what metabolic process?a. reproduction c. locomotionb. digestion d. osmoregulationSea urchins live in marine communities that include a variety of species living in close proximity. Most of these species, including sea urchins, have external fertilization, a reproductive strategy that potentially has a low probability of sperm and egg contact. List several adaptations of sea urchins that help ensure successful reproduction. Explain.