Which of these is mismatched?a. chorion—sense perceptionb. yolk sac—fi rst site of blood cell formationc. allantois—umbilical blood vesselsd. amnion—contains fl uid that protects embryo

Q: Fertilization is the first step in sexually reproducing species. A cortical reaction failure that…

A: Fertilization is the process of fusion of nuclei of two haploid reproductive cells, sperm (n) and…

Q: Discuss how the development of an artifi cial placenta is an important step in the study of…

A: The artificial placental involves the fruitful transportation of a hatchling weighing somewhere in…

Q: Placenta ... a) ... develops from trophoblast cells. b) ... develops from embryoblast cells. c)…

A: Pregnancy occurs when the male gamete sperm fuses and fertilizes with the female egg that is…

Q: In protostomes and deuterostomes, the space between the endoderm and the ectoderm is important…

A: In early embryonic development, all the animal cells form layers known as germ layers. There are…

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: Choose the best of the following The identity of each segment of a developing embryo is…

A: the embryo is the structure formed by the division of zygote. it is the embryo that develops into 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 _______ is an important structure for waste storage in birds and some mammals, but not in…

A: Extraembryonic membranes are the layers enclosing the embryo inside the uterus. There are four…

Q: The surface that enables active and passive exchange between the fetal and maternal bloodstreams is…

A: Answer is b.)  chorionic villi.

Q: What structural adaptation in chickens allows them to lay theireggs in arid environments rather than…

A: The vertebrate embryo requires an aqueous environment for their development. The amphibians and…

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: Which developmental stage is mismatched? a. second week—implantation b. third week—heart development…

A: Option D is mis Matched

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: What part of the blastocyst develops into the embryo?a. Yolk sacb. Placentac. Polar bodyd. Inner…

A: The time taken for the complete development of the fetus inside the uterus is known as the…

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

A: Answer is b.) amnion.

Q: A baby born four weeks before its due date is most likely to have anunderdevelopeda. central nervous…

A: The central nervous system begins developing two weeks after fertilization and continues developing…

Q: st the factors believed to cause the wide etween the maternal and etween the maternal and fetal PO2…

A: The fetus is connected to the mother with the help of an umbilical cord. The exchange of food, and…

Q: An example of a vestigial structure in humans is the tailbone. the ability to produce adrenaline.…

A: Vestigial organs or structures are those structures that have no function in the body of an…

Q: Match the germ layer to its derivative Neural tube V [ Choose ] Ectoderm Endoderm Mesoderm…

A: Cells of Germ layers grow and divide to produce different parts /organs of body of an organism.

Q: At what phase of development would a mouse embryo appear me similar to a chick embryo? Blastula…

A: THE STAGE OF DEVELOPMENTIS BLASTULA STAGE.

Q: Fill in the blank:  After the eighth week, a developing human is called a(an) ___________________…

A: On the very first day of your last menstrual period Initially the stage comes when the start of the…

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 extra-embyonic membranes become the embryonic portion of the structure…

A:

Q: Blood islands first form in the embryonic:- a. spleen. d. liver. b. yolk sac. e. red bone marrow. c.…

A: Blood Islands are structures that form around the developing embryo and which give rise to the…

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: Most mammals are born with the instinct to suckle (nurse). If a mammal is not born with this…

A: Most mammals are born with the instinct to suckle (nurse). It a mammal is not born with this…

Q: How does the placenta work? blood to mother low in O,/nutrients, high in CO,waste umbilical cord…

A: In placental mammals, the fertilized zygote develops into a young one within the uterus (womb) in…

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: 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 tissue type or organ is correctly matched with its germ layer tissue? A) nervous–mesoderm B)…

A: Introduction :- The mesoderm is a germ layer that develops between the ectoderm, which produces skin…

Q: The ___________________ of an egg serves as an embryos water supply while the ____________ provides…

A: The correct option is C) albumen; allantois

Q: Which of these produces blood cells and germ cells at the early stages of fetal development? O…

A: The yolk sac is responsible for producing blood cells and germ cells during the early stages of…

Q: D Which of the structures includes the usual site of fertilization? O A O 3 O 2 O 5

A: Fertilization is a process of fusion of haploid gametes (egg and sperm) to form a diploid zygote.

Q: In the development of the nervous system, one of the following is false? The neural tube maintains…

A: The vertebrate nervous system is framed in embryos. neural plate: A thick, level bundle of ectoderm…

Q: Aside from the nervous system,  which other organs system develops out of the ectoderm

A: Integumentary system (SKIN)

Q: Thenumber of eggs laid by a female is called her:a.fertility.b.gonadosomatic index.c.growth…

A: In the reproductive body of an animal, an egg is ellipsoidal or spherical in shape. Within the egg…

Q: O Lungs Claws or nails Mammary glands O Jaws O Fur O Feathers

A: A phylogenetic tree helps to understand evolutionary relationship between organisms.

Q: This is the outermost layer that protects from water loss but allows for gas exchange: amnion…

A: An embryo is present at an early stage of the development of a multicellular organism. The formation…

Q: Which of the following statements is true: O invagiantion is folding of cells that happens early in…

A: Blastocoel is a fluid filled cavity in blastula. First the morula(60 or more cells) is formed then…

Q: Which of the following correctly lists the germ layers of an embryo? O A. exoderm, mesoderm,…

A: Step 1 Embryonic development or embryogenesis is the development of the embryo from the fertilized…

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…