Which of the following organisms would NOT undergo gastrulation? a. fungi and sponges b. worms and snails c. nematodes d. those with only one opening for food and waste (protostomes)

Q: Which molecules are released from the dorsal blastopore lip in the blastula-stage embryo?     a.…

A:

Q: At which stage of embryogenesis, major patterns of the internal tissues of the embryo have been…

A: Embryogenesis It is defined as a process which occurs after the process of fertilization of an…

Q: Which of the following cell layers is not necessary to be considered a eumetazoan? a. Ectoderm…

A: Eumetazoans are the animals which are characterized by the presence of true tissues organized into…

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: Which of the following is not true about starfish eggs? Choose all possible answers a. eggs are…

A: Echinoderms with a star form that belong to the class Asteroidea are known as starfish or sea stars.…

Q: what is the name of the structure where gastrulation begins in each animal below. Frog and fish has…

A: Gastrulation is the process of the formation of the child inside the womb, the complete development…

Q: Discuss the following terms in detail: 1.1  Fertilisation  1.2  Cleavage   1.3  Gastrulation 1.4…

A: Gametes are defined as the reproductive haploid cells of the organism where they consists of 23…

Q: The cells that give rise to gametesa. are derived from the mesoderm.b. often arise independently…

A: The term ‘reproduction’ is used for the process in which an offspring is produced from their…

Q: Along the notochord, segmented blocks of tissue that give rise to muscles, vertebrae, and connective…

A: Answer is d.) somites.

Q: The Life Cycle of the Horse Embryo Process 2 Zygote Process Gametes Process 3 Reproductive organs…

A: The life cycle of a horse, like many other sexually reproducing organisms, involves a series of…

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 of the following is develops into the archenteron? A. the placenta B. the endoderm C. the…

A: Placenta is an organ which helps in providing oxygen and nutrients to growing baby and removal of…

Q: What is the difference between a mesoderm and a mesoglea?

A: Diploblastic animals contain body wall which develop from 2 embryonic germ layer - ectoderm and…

Q: Which of the following correctly identifies the stages in embryonic development between weeks 2 and…

A: Fertilization is a process in which haploid male gamete (sperm) fuses with the haploid female gamete…

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: Gastrulation in a mammal would be most similar to gastrulation in a. a gecko. b. a tuna. c. an…

A: Gastrulation is a process of rearranging the cells of blastula (blastomere) into three germ layers…

Q: How many functional eggs (ova) result from one oogonium?     A. 1 and 3 polar bodies   B. 18…

A: In sexually reproducing organisms haploid gametes are produced. Female gametes are called eggs…

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: In humans, implantation in the uterus occurs at whichstage of embryonic development?a. zygoteb.…

A: An embryo is an unborn offspring in the steps of development. It is part of the life cycle. It is…

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 rows correctly identifies the development of the germ layers? Select one:…

A: The germ layers are an embryonic collection of cells that aid in the creation and development of…

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: Which cell contributes the necessary nutrition to the growing zygote? a a polar body b the egg…

A: Introduction: A zygote is a eukaryotic cell created when two gametes fertilise each other. The…

Q: After the zygote undergoes several mitotic divisions, the resulting structure that implants in the…

A: Fertilization is the process in which gametes fuse to form a zygote. The zygote undergoes several…

Q: How do you expect Kartagener syndrome leads to infertility?   A. The lack of a plasma membrane means…

A: Primary ciliary dyskinesia(PCD) is a rare autosomal Recessive genetic disorder. PCD is a genetically…

Q: At the end of the 3rd month (12th week) of intrauterine life one of the following is not yet…

A: Fertilization is the process by which the male gamete (sperm) fuses with the female gamete (egg)…

Q: When does an embryo become a fetus? Select one: a. When gastrulation forms the three primary germ…

A: At the end of the 8th week after fertilization (10 weeks of pregnancy), the embryo is considered a…

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: What's the process of gastrulation in humans, how the embryo forms the three germ layers, and which…

A: The inner cell mass which is known as Blastula is now grown into a cell mass known  Gastrula and…

Q: Label each tissue with the specific source germ cells: v Gastrointestinal tract A. Intermediate…

A: We are tripoblastic organisms that means we contains three types of germ layers that includes…

Q: 1. Match the early embryo characteristics with the correct stage of development. Not all choices…

A: Embryology is a branch of science which deals with the study of embryo development. Embryology helps…

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

A:

Q: In the development of amniotes (reptiles, birds, mammals), the defining feature of gastrulation…

A: Answer is : primitive streak The beginning of gastrulation is marked by the appearance of a groove…

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: 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: 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: The development of a zygote into a baby involves pre-embryonic development for the first 2 weeks,…

A: Introduction: Prenatal development occurs in three major phases. The first two weeks following…

Q: The zona pellucida is important in mammals because it...

A: The zona pellucida is a thick extracellular layer that covers all mammalian eggs and preimplantation…

Q: All of the following are true about humans EXCEPT: A. our zygote and early embryo cells have…

A: Introduction :- A zygote is a eukaryotic cell created when two gametes fertilise each other. The…