Only one sperm enters an egg becausea. sperm have an acrosome.b. the corona radiata gets larger.c. changes occur in the zona pellucida.d. the cytoplasm hardens.e. All of these are correct.

Q: In females, meiosis is not completed (a) until birth. (b) until puberty. (c) until fertilization…

A: Gametogenesis is a process by which gametes are produced through meiotic division. Sperm and egg…

Q: The seven-day blastocyst: A. has a single layer of trophoblast at the embryonic pole B. has an…

A: The correct option is C.

Q: Each egg cell develops in its own fluidfilled space called a/an _____.

A: Each egg cell develops in its own fluid-filled space called a/an Follicle. The follicle assumes a…

Q: Fill in the blank:  _________________ on the inner lining of the uterine tube aid in moving a…

A: Embryo genesis is the formation of embryo and for this process to occur, ovary releases an…

Q: If an egg cell were treated with EDTA, a chemical that bindscalcium and magnesium ions,(A) the…

A: EDTA - Ethelene diamine tetra acetic acid is a chelating agent and is very effective chelator of…

Q: The umbilical cord connects the developing fetus to thea. mother’s belly button.b. placenta.c.…

A: Reproduction is the process by which an organism creates more of its own progeny. During…

Q: embedded

A: The Uteroplacental circulation is the vascular contact that is present between the uterus and the…

Q: Which of the following structure develops into only the fetus? A. Blastocyte B. Zygote C.…

A:

Q: Which of the following is a major difference between spermatogenesis and oogenesis? a.…

A: The reproductive arrangement of an organic entity, otherwise called the genital framework, is the…

Q: Choose the best of the following The fusion of a sperm and an egg cell initally produces which of…

A: Process of reproduction in human beings is very complex and interesting. It includes various…

Q: The beginning of brain and spinal cord formation is termeda. cephalocaudal folding.b.…

A: Gastrulation process is characterized by formation of three primary germ layers, they are ectoderm,…

Q: Parthenogenesis isa. the process by which the germ layers form.b. involved in the formation of the…

A: Reproduction is the process by which living beings produce their own kind.

Q: The inner cell mass of a human blastocysta. gives rise to the chorion.b. gives rise to the…

A: Cell is the basic unit of life. Based on the number of cells an organism may be prokaryotic or…

Q: All fish, all birds and all mammals are A animals with internal fertilization. B carnivores. C…

A: Classification of animals includes the following phyla:Phylum - PoriferaPhylum - CnidariaPhylum -…

Q: Oogenesis produces_viable cell/s, and spermatogenesis produces_ viable cell/s О 4,2 О 1,4 O 4,4 O…

A: Spermatogenesis and oogenesis are the processes of formation of male and female gametes.…

Q: Which of the following has three germ layers? (a) morula  (b) gastrula (c) blastula (d) blastocyst…

A: Answer is b.)  gastrula.

Q: The fusion of a sperm and an egg cell initally produces which of thefollowing?a. blastocyst d.…

A: There are 2 types of cell namely somatic cells and germ cells. Germ cells are aimed to produce…

Q: Choose the best Polar bodies are produced duringa. DNA replication.            d. oogenesis.b.…

A: Polar bodies:                A small haploid cell which is formed at the same time as an egg cell…

Q: Binding of a sperm to an oocyte plasma membrane causes the oocyte to______ . a. enter an oviduct c.…

A: During fertilization, when the spermatozoan penetrate the zona pellucida, makes physical contact…

Q: A gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the…

A: In developmental biology, gastrulation is a stage early in the embryonic development of many…

Q: In a reptile egg, the extraembryonic membrane thatencloses the embryo in a watery environment is…

A: Answer is b.) amnion.

Q: Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The…

A: The fusion and amalgamation of the male spermatozoa with the ovum of the female are the…

Q: Match the reproductive organ to its function (job). v eggs are made here A. vagina vwhere the embryo…

A: Reproduction is the process by which an organism creates more of its own progeny. Reproduction is…

Q: Sperm use B is released and a in the uterus. to breakdown the outer coating of the egg, and once the…

A: Developmental biology is the branch of biology that studies how several interrelated mechanisms…

Q: In animals, a key difference between spermatogenesis andoogenesis is thata. only oogenesis involves…

A: Reproduction refer to a biological process in which new organisms are produced from their parents.…

Q: For the first 8 weeks of gestation, a conceptus is nourished mainly by a. The placenta. b. Amniotic…

A: A conceptus receives nutrition is totally depends on the state. The foetus stage receives nutrition…

Q: Which of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c.…

A: The cell is known to be the fundamental unit of all life forms. Those who are similar in functions…

Q: Which of the following extra-embyonic membranes become the embryonic portion of the structure…

A:

Q: Somites a. begin forming at the tail end of the embryo and then move forward in a wavelike…

A: Introduction: Somites can be defined as the longitudinal series among other series of blocklike…

Q: Which of the following statements is incorrect?a. The placenta secretes hormones such as…

A: The placenta is a temporary organ that is formed in the uterus during pregnancy. The umbilical cord…

Q: The archenteron develops into(A) the mesoderm.(B) the endoderm.(C) the placenta.(D) the lumen of the…

A: Gastrulation is the process of reorganization of the blastula, a hollow structure into a two or…

Q: During embryonic development, unique cell layers develop into specific groups of tissues or organs…

A: The development of a plant or animal embryo is called embryogenesis. This process starts with the…

Q: Rarely, two sperm may penetrate a secondary oocyte. Do youthink this fertilized cell will survive…

A: Fusion of only one sperm takes place with the egg.

Q: If cells from the presumptive neural ectoderm of a frog gastrula are transplanted onto the surface…

A: The gastrula formation occurs during the early stage of cell development. During gastrulation the…

Q: A sperm has just fertilized a human egg in the fallopian tube. Trace the events that the fertilized…

A: Fertilization is the process that involves the union of sperm and female ovum gametes to produce a…

Q: 1. salping/o, a. pelvic floor in male and female anatomy b. passageway between the uterus and the…

A: The female reproductive system includes the major organs such as uterus, fallopian tubes and…

Q: What causes an embryo to develop female external genitals?A. A high ratio of estradiol to…

A: Cause of an embryo develop external genitals depends on testosterone level and not on estradiol

Q: During the embryonic developmen, the trophoblast will developed into  Select one: A. The embryonic…

A: Developmental biology focuses on the study of developmental sequences of organisms. The embryonic…

Q: ain The process of releasing of an egg from the ovary is called .

A: Ova (singular egg cell, from the Latin term egg cell, which means 'egg') is another name for egg…

Q: From which of the following is the embryo developed? a) Trophoblasts b) Blastocoelen c) The…

A: In humans the period of pregnancy is about 39-40 weeks. This is called as gestational period. During…

Q: Gastrulation occurs to form which three tissues? O hypoblast O ectoderm mesoderm O endoderm O B, C,…

A: During the early stages of embryo development, a multitude of signals are being released, some of…