The formation of three germ layers is called Select one: a. gastrulation b. pluripotency c. differentiation d. neurulation

Q: Anencephaly is likely caused by a problem with which of the following? a.) Primary Neurulation b.)…

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

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: 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: Meroblastic cleavage is typical of embryos formed from _______________ eggs. (a) moderately…

A: The egg is the vessel of the zygote, in which an embryo develops until it becomes mature enough to…

Q: What is the relationship between a primary spermatocyteand a spermatogonium?a. They are genetically…

A: Sexually reproducing organisms have a reproductive system consisting of primary sex organs called…

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: Answer the following questions: 1. How are twins derived? 2. Describe a monozygotic and dizygotic…

A: Note: As Per Bartleby Guidelines For Further Answers Please Repost The Question. Introduction:  A…

Q: External fertilization occurs in which type of environment? a. aquatic b. forested c. savanna d.…

A: “External Fertilization” is a process of reproduction in which the “male gamete” (sperm) and the…

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

A: Answer is b.)  gastrula.

Q: The Following are parts of sperm cell, what their importance in fertilization? A. Acrosomal Vesicle…

A: The Following are parts of sperm cell, what their importance in fertilization? A. Acrosomal Vesicle…

Q: What would happen if the trophoblast did not secrete hCG upon implantation of the blastocyst? a. The…

A: Implantation is the process that signals that the pre-embryonic development stage is completed. This…

Q: Internal fertilizationa. can prevent the drying out of gametes and zygotes.b. must take place on…

A: The process in which haploid gametes (egg and sperm) fused to form diploid zygote is called…

Q: Internal and external fertilization differ in that species thata. produce an amniotic egg have…

A: The external fertilization process usually takes place in an aquatic environment where the male and…

Q: The outermost germ layer in a vertebrate gastrula is the____ . a. endoderm c. mesoderm b. ectoderm…

A: BASIC INFORMATION  FERTILIZATION  It is the process of the fusion of the male as well as the female…

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: At what stage uteroplacental circulation started?  a.Maternal blood entering the lacunar  b.Embryo…

A: The uteroplacental circulation is a circulatory framework where two circulation systems, the fetal…

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: The process of gastrulation forms the _______. a. blastula b. zygote c. organs d. germ layers

A: Embryogenesis refers to a process in which the development of an embryo takes place. An embryo can…

Q: . The structure labeled C, within which development occurs, is known as the a. placenta. b. oviduct…

A: The picture is showing the foetus in the womb of mother.

Q: Unchanging environments are advantageous to organismsa. that reproduce asexually.b. that undergo…

A: Asexual reproduction is the type of reproduction where there is no fusion of male and female gametes…

Q: In humans, fertilization usually occurs in thea. fimbriae.b. vagina.c. uterus.d. uterine tubes.

A: Answer -Fertilization is the process by which both the gametes from two different parents fuse…

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: In humans, the development of fertilised egg takes place in the: (a) ovary (b) testis (c) oviduct…

A: Fertilization in humans refers to the fusion of human sperm and egg. This process occurs in the…

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: . In humans, identical twins are possible because(A) extraembryonic cells interact with the zygote…

A: The identical twins are also referred to as monozygotic twins. This occurs from the fertilization of…

Q: 4. Sarcomas and hematopoietic cancers are both derived from which germ layer? A. Ectoderm B.…

A: "Cancer" is a fatal disease that has both physical and mental consequences for a person. Cancer can…

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: The..........is a hollow ball of cells that develops from the morula. a) Blastocyst b) Oviduct c)…

A: The fusion of male gamete (haploid) and female gamete (haploid) is known as fertilization. It…

Q: By the end of gastrulation the [Select] * has surrounded the outside of the embryo, the [ Select ]…

A: Gastrulation refers to the process by which a gastrula is formed from a blastula. Grastrula is the…

Q: Which of the following type of placenta is found in humans? a) Discoidal b) Zonary c) Diffuse d)…

A: Introduction - During the pregnancy phase, the placenta is an organ that grows inside the uterus. A…

Q: The cortical reaction of sea urchin eggs functionsdirectly in(A) the formation of a fertilization…

A: Sea urchins are the globular animals that belong to the class Echinoidea. They come under the…

Q: Which of the following is true about Cleavage? Choose all possible answers a. At the end of…

A: Cleavage is the process of cell division in the developing embryo following fertilisation in…

Q: Which of the following is not true about neurulation? Choose all possible answers. a. Segregation…

A: The brain is a complex organ that controls the thought, memory, emotion, touch, motor skills,…

Q: 1. Discuss the formation of cleavage of sea urchin 2. Discuss the formation of gastrulation of sea…

A: Sea urchins show radial holoblastic cleavage. The first and the second cleavages are both meridoneal…

Q: Which of the following does NOT happen in the germinal period? a. dividing mass of cells travels to…

A: During the nine months of a female's pregnancy, an infant goes through a lot of changes. An infant's…

Q: An individual who is XY but is missing the SRY gene would be expected to develop into a. a male. b.…

A: SRY stands for the sex determining region of Y-chromosome. A normal individual have 46 chromosome in…

Q: The expression of homeotic genes leads to a. the establishment of body axes. b. the formation of…

A: Homeotic genes are known to be the master regulator genes because they direct body structures or…

Q: The folding of ectoderm on the top of the embryo during organogenesis produces...? Group of answer…

A: In humans, the folding of neuro-ectoderm gives rise to one of the most important structure i.e…

Q: A change in the amount of yolk and its distribution in the egg will affect:   A Fertilization…

A: Fertilization is the fusion of haploid male and female gamete results in the formation of the…

Q: During morphogenesis, gastrulation does which of the following? A. Gastrulation produces the…

A: Several stages are involved in the development of a baby from a zygote during pregnancy. It begins…

Q: The cells indicated by the tip of the red arrow A) produce testosterone B) are the interstitial…

A: In the given section of slide showing various cells.

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: In the diagram above, the cell that nourishes developing sperm cells and the cell that produces…

A: The picture is showing the T. S. Of testis. It is responsible for producing male gametes.