B) the ovum. Abstract. Reproduction relies on those females having access to sperm from males of another species. In mammalian eggs, the receptors for sperm are found in the _____. A human blastomere is  A) an embryonic cell that is much smaller than the ovum.

A) fertilization membrane B) egg plasma membrane C) cytosol of the egg D) mitochondria of the egg. Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief  A) mitosis. cytosol of the egg fertilization membrane mitochondria of the egg egg plasma membrane. c. fertilization membrane. Early animal development progresses through distinct stages: first the production of the zygote through fertilization, then cleavage, then the formation of the gastrula, and then the formation of the blastula.In sea urchins, the process of fertilization produces a(n) _____.the formation of a fertilization envelope that bars additional sperm from entry into the eggAs cleavage continues, a zygote forms into a solid multicellular ball called a(n) _____.Several hours after fertilization, cleavage results in the formation of a hollow ball of cells called a _____.The _____ eventually develops into the sea urchin's digestive tract.During gastrulation, invagination occurs at the _____.In vertebrates, the ectoderm gives rise to the _____.During gastrulation in frogs, a rod of mesoderm under the dorsal surface forms the _____.During gastrulation in frogs, cells from the animal pole spread over the embryo and form the _____.The notochord functions as a core around which mesodermal cells form the frog's _____.An ectodermal thickening above the frog's notochord forms a _____.The _____ is(are) formed when the neural folds join and a portion of the neural plate sinks beneath the embryo's surface.The enlarged anterior portion of the neural tube will develop into a frog's _____.The posterior portion of the neural tube will develop into the frog's _____.Birds, reptiles, and mammals are called "amniotes" because _____.they have extra-embryonic membranes that develop an aqueous environment in which development occursEmbryonic cells especially active in assuring nutritional exchange between a pregnant woman and her embryo are found in the _____.An embryonic cell that is "totipotent" is one that can _____.by itself, give rise to the entire embryo, as cleavage proceedsChoose the correct developmental sequence of animal development.fertilization → cleavage → gastrulation → organogenesisAmong the following, the earliest consequence of the acrosomal reaction is _____.The uneven cleavage of cells early in the development of the yolk-rich embryos of birds is called _____.Even in the absence of sperm, metabolic activity in an egg can be artificially activated by _____.The formation of the fertilization envelope requires an increase in the availability of _____.Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief _____.has receptor molecules that are specific for binding acrosomal proteinsFertilization of an egg without activation is most like _____.placing the key in the ignition of a car but not starting the engineA reproductive difference between sea urchins and humans is _____.the sea urchin egg completes meiosis prior to fertilization, but meiosis in humans is completed after fertilizationDuring fertilization, the acrosomal contents _____.digest the protective jelly coat on the surface of the eggIn a newly fertilized egg, the vitelline layer _____.lifts away from the egg and hardens to form a fertilization envelopeIn sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are _____.In an egg cell treated with a chemical that binds calcium and magnesium ions, the _____.In mammalian eggs, the receptors for sperm are found in the _____.At the moment of sperm penetration, human eggs _____.In a developing frog embryo, most of the yolk is _____.Among these choices, the largest cell involved in frog reproduction is _____.The pattern of embryonic development in which only the cells lacking yolk subsequently undergo cleavage is called _____.As cleavage continues during frog development, the size of the blastomeres _____.decreases as the number of the blastomeres increasesThe vegetal pole of a frog zygote differs from the animal pole in that _____.the vegetal pole has a higher concentration of yolkh of the following correctly displays the sequence of developmental milestones?The first cavity formed during frog development is the _____.In some rare salamander species, all individuals are females.

Contact of a sperm with signal molecules in the coat of an egg causes the sperm to undergo  A) mitosis. During which of the following processes did the original error most likely occur?True or false?

In mammalian eggs, the receptors for sperm are found in the a. mitochondria of the egg. the formation of a diploid zygote from a haploid egg and spermbegins with the discharge of hydrolytic enzymes from the acrosome a specialized vesicle at the tip of the spermAfter fertilization, the sperm and egg become a zygote, which then begins a number of cell divisions called cleavagethe smaller cells that cleavage creates are called:A type of cleavage in which there is complete division of the egg, as in eggs having little yolk (sea urchin) or a moderate amount of yolk (frog).a type of cleavage in which there is incomplete division of yolk-rich egg, characteristic of avian developmentthe cellular and tissue based process by which the animal body takes shapea set of cells at or near the surface of the blastula moves to an interior location, cell layers are established, and a primitive digestive tube is formedfurther transformation that occurs and forms organsOne of the three primary (embryonic) germ layers formed during gastrulation. B) the beginning of the follicular ph... As cleavage continues during frog development, the size of the blastomeres  A) increases as the number of the blastomeres decreases. i think its an oddly put question, put id have to say the A. the membrane. In mice, ZP3, one of only three zona pellucida glycoproteins, serves as sperm receptor. d. cytosol of the egg. The extracellular coat, or zona pellucida, of mammalian eggs contains species-specific receptors to which sperm bind as a prelude to fertilization. Acrosome-intact, but not acrosome-reacted, mouse sperm recognize and interact with specific O- linked oligosaccharides of ZP3 resulting in sperm-egg … Favorite Answer. In mammalian eggs, the receptors for sperm are found in the In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are A sea urchin zygote undergoes its first cell division In a developing frog embryo, most of the yolk is Peaks of LH and FSH production occur during  A) the menstrual flow phase of the uterine cycle. ... found within the cleavage furrow D) distributed equally throughout the embryo. e. nucleus of the egg. This process produces _____.Tissue and organ formation begins during the process of organogenesis.The neural tube forms from ectoderm and develops into the central nervous system.In animal development, which of the following best describes the process of cleavage?Which of the following are the three germ layers contained in the gastrula?Which of the following stages of development is defined by the three embryonic tissue layers (ectoderm, mesoderm, and endoderm)?What happens to a cell during the process of differentiation?It undergoes a change toward a more specialized form or function.A child is born without a fully developed pancreas.