Vhich iš true of gastrulation: occurs in Porifera results in a specific embryonic stage O forms a multilayered embryo involves the rearrangement of cells of the bla

Q: Fusion of pronuclei occurs during ________.a. spermatogenesisb. ovulationc. fertilizationd.…

A: A pronucleus refers to the haploid nucleus of either the sperm or the egg, both present in the…

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: Spermatogenesis usually occurs during the ___________ and continues in the _________ stage in some…

A: * spermatogenis is the process of formation of sperm from germ cells in semniferous tubules of…

Q: Spermatogenesis usually occurs during the ___________ and continues in the _________ stage in some…

A: Note - We are supposed to answer 3 subpart according to our guidelines. Please repost other…

Q: During what process does the amnion envelop theembryo?a. embryonic foldingb. gastrulationc.…

A: The amnion refers to a membrane, which closely envelops the embryo when formed initially. It gets…

Q: is when an egg is released from the ovary. This typically occurs once a month in females.

A: Branch of biology that deals with the study of all those processes which take place during…

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: ___________________ fluid protects the embryo from jarred movements and provides a watery…

A: The embryo inside the womb of the mother grows in a sac like bag called the amniotic sac.  It allows…

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 _______ 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: sea star oral 4.The male gonads are called the _______________ and the female gonads are called the…

A: Sea star or starfish is a member of class Asteroidea and phylum Echinoderms. It lives in marine…

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

A: Answer is b.)  gastrula.

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: EVOLUTION CONNECTION Hermaphroditism is often foundin animals that are fixed to a surface. Motile…

A: Hermaphroditism is the condition in which an organism has both the sex gametes produced inside the…

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: 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: 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: 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: 44- need help with following. please be specifiy about answer

A: Zygote is proudced by the fusion of male gamete (sperm) and female gamete (egg).

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: When the embryo is implanted, what developmental stage this be? cleavage fetus blastula gastrula

A: Sexual reproduction in humans includes a fusion of sperms and eggs to form a zygote.

Q: Approximately 3 days after fertilization , the following structure develops * O blastomere O morula…

A: The development of the human embryo originates by the fusion of egg and sperm(fertilization), which…

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: the box below. ovaries testes semina! vesicles cloaca ovarian tubes spermatheca oviducts ovarioles…

A: Introduction  Life starts from a single cell called Zygote. A zygote is formed by the fusion of 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: What is "ecdysis"? O The outermost covering of an ovum that undergoes external fertilization. O A…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In protostomes [Select] cleavage occurs and it is [ Select ] In addition, in protostomes th v […

A: Protostomes are groups of animals sharing common ancestors and have a true body cavity (coelom).…

Q: Which of the following best describes the cloaca in nonmammalian adult vertebrates? O It is a…

A: Vertebrata is a phylum in which the animals have a vertebrae or vertebral column to support the body…

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 features are correct regarding this female organism? (several answers must be…

A: Mammals are characterized by presence of mammary gland which present in female for milk production…

Q: One role of the acrosomal reaction is: O Fusing the sperm membrane with the oocyte membrane O…

A: Fertilization is the process in which male gametes fuses with female gamete to form Diploid zygote .…

Q: Match the rodent ovulatory cycle phase with the correct hormone combination Proestrus x Peak…

A: The term menstrual cycle is associated with the occurrence of cyclic ovarian activities in mammals.…

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 false? a. Cadherins, but not integrins play a role in…

A: Fertilization takes place when the nucleus of the sperm fuses with nucleus of the eff. A zygote is…

Q: An early stage embryo consisting of mutiple layers is a blastula O True False

A: In mammals, a blastula is an initial phase of embryonic development.

Q: In man, fertilization of ovum takes place in:a) Vaginab) ovary.…

A: The process of fusion of a sperm with an ovum is known as fertilization.

Q: T.S. of mammalian testis revealing seminiferous tubules show different types of cell.(i) Name the…

A: The male reproductive system is located in the pelvis region. It includes a pair of testes along…

Q: In amphibian gastrulation, are there any evidences of cephalization? Why or why not? (mi

A: Gastrulation: During gastrulation, cell movements result in a massive reorganization of the embryo…

Q: The cell formed after fertisation is called:         I.   Foetus        II.   Zygote       III.…

A: Fertilization is the process of fusion of male and female gametes. It is one of the essential…

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 nucleus of the spermatozoan is found in the centriole axial filament tail head plasma membrane

A: Spermatozoa are also called sperms which are male gametes that carry male's genetic material. These…

Q: to breakdown the [Choose ] once the sperm penetrates, Sperm use B. is released and a Cforms pri…

A: Thank you for the question  Answer :- Sperm use  Acrosomal enzyme to breakdown the outer coating of…

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…