What are 2 unique cell biolgical features of the egg and 2 unique cell biological features of sperm? Describe and include an example of 4 strategies used during embryogenesis to create different cellular identities?
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What are 2 unique cell biolgical features of the egg and 2 unique cell biological features of sperm?
Describe and include an example of 4 strategies used during embryogenesis to create different cellular identities?
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- There are 6 major events in fertilization. Discuss the process of fertilization or conception, with emphasis on the sperm-egg interaction. Egg-binding proteins on the sperm cell surface bind to molecules on the egg cell membrane. What happens to the chromosomes of the sperm and egg? The sperm cell membrane fuses with the egg plasma membrane, allowing the sperm nucleus and centriole to enter the egg cytoplasm. What is the purpose/role of the centriole during fertilization? The final event would be when the egg and sperm pronuclei migrate toward each other in preparation for syngamy. What is the purpose of reproduction?Carefully distinguish between the terms differentiation and determination. Which phenomenon occurs initially during development?What are morphogens, exactly? Explain how they affect the patterning of tissue throughout embryonic development. Give 4 concrete instances to back up your claims.
- There are 6 major events in fertilization. Discuss the process of fertilization or conception, with emphasis on the sperm-egg interaction. Proteins on the sperm plasma membrane bind to ZP3 molecules within the zona pellucida of the egg. Why is this event important? Zona binding triggers the acrosome reaction, in which the sperm plasma membrane fuses with the outer acrosomal membrane, causing exocytosis of acrosomal contents. What is in the "acrosomal content"? Acrosomal enzymes begin to dissolve a hole in the zona pellucida. This enzymatic degradation, accompanied by rapid sperm tail beating, moves the sperm through the zona. Where does the sperm intend to reach?--------------- A. Answer the following questions briefly (3-5 sentences only).1. How are the three axes for symmetry in the animal bodies established?2. Explain how the different germ layers give rise to different tissue types.3. Explain the role of axis formation in development B. write down the autapomorphic traits for the c3, c4, CAM plants and include their distinct environments Link: https://www.nature.com/scitable/knowledge/library/the-ecology-of-photosynthetic-pathways-15785165/What generates the first differences among cells in an early embryo? And what controls the differentiation of all the various cell types as development proceeds?
- What are the potential implications of altered embryonic cell fate determination on the overall development and functioning of multicellular organisms?why is it relevant to know the prevalence of premature rupture of membranes in adolescent pregnancy vs adult pregnancy?hich of the following rows identifies the structure responsible for maintaining the endometrium before implantation, and the structure that implants into the endometrium, respectively? Select one: a. Structure that maintains the endometrium Structure that implants in the endometrium Placenta Zygote b. Structure that maintains the endometrium Structure that implants into the endometrium Corpus luteum Zygote c. Structure that maintains the endometrium Structure that implants into the endometrium Corpus luteum Blastocyst d. Structure that maintains the endometrium Structure that implants in the endometrium Placenta Blastocyst
- A: Why do sea urchins have external fertilization? [Discuss the life style of the developing sea urchin embryo in the water column compared to a very different ecological niche of the adults on the ocean floor. Besides, would you want to give live birth to a sea urchin! ouch!] 2: Then why don't the parents take care of the young? [In fact the adults do in a way. After the embryo has grown large enough and metamorphosed into a young urchin they hide in the spines of the adults, living off of the scraps of food produced from the messy eating of the adults] 3: Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?what kind of division can perform normal growth and development for the embryo & why?Zygote Embryo Muscle cells Intestinal cells Liver cells Blood cells Nerve cell Cardiac cells (1) Specialization occurs, resulting in the formation of a great variety of cell types. (2) Genes are inserted into the zygote to allow for the formation of different cell types. (3) The expression of genes responsible for the different cell types is controlled by the placenta. (4) The genetic information in the zygote is divided to produce a complete set for each cell type