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

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: If an embryo splits at the two-cell stage, each of the resulting identical twins will have its own…

A: Identical twins:  The splitting up of the embryos into two at the two-cell stage leads to 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: hy is it that the first trimester of pregnancy the most critical in humans? How will you relate it…

A: It is the early phase of pregnancy. The first trimester is marked as 1st day after your last period…

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: 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: Which of the following structures secretes the hormone that sustains the corpus luteum during the…

A: Corpus luteum is a temporary endocrine structure involved in ovulation and early pregnancy.  The…

Q: embedded

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

Q: Which process occurs between the zygote and the embryo stage

A: Fertilization is the process of fusion of the male gamete and the female gamete, resulting in…

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

A:

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: 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: Cleavage produces daughter cells called ________.a. trophoblastsb. blastocystsc. morulaed.…

A: Cleavage is described as the procedure of cell division in early embryo to generate a cluster of…

Q: Chorionic villi develop from:- a. the zona pellucida. b. the endometrium. c. the…

A: Chorionic Villi sprout from the chorion after their rapid proliferation in order to give a maximum…

Q: The placenta is formed from the embryo and the of the of the mother. O umbilical cord, oviduct O…

A: Reproduction is an important physiological process of all the living organisms. to increase their…

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 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: Birds, reptiles and insects have something in common as far as the development of their embryos.…

A: Answer :- Birds, insects and reptiles are higher vertebrate . All of these are developed from…

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: Where does fertilization of the egg by the spermtypically occur?a. vaginab. uterusc. uterine tubed.…

A: Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete…

Q: what structure is the pointer pointing to? O Notochord what germ tissues are those structutres made…

A: There are different types of body structures, each specified for a particular function. These…

Q: Which of the following is not a phase of the ovarian cycle? a follicular b. secretory C. ovulation…

A: The ovary is the primary female sex organ, localized on the sides of the lower abdomen in human…

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: The feature that distinguishes a fetus from an embryo is that the fetus has a. All of the organ…

A: Answer is a.) All of the Organ systems.

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: Where does fertilization take place in human body.

A: Humans are the multicellular complex organism and reproduce by sexual mode. This mode of…

Q: uring the embryonic period each of the three germ layers gives rise to a number of specific tissues…

A: Triploblastic animals have three germinal layers (ectoderm, mesoderm and endoderm) during embryonic…

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: Implantation of a blastocyst does not always happen.  Approximately how many days after…

A: Fertilization of the secondary oocyte in the oviduct forms zygote which in turn divides by cleavage.…

Q: Illustrate an egg in early cleavage, distinguish this stage from thise that follow (2,4,8 cell…

A: In developmental biology, several stages are there which determines the development of the fetus…

Q: From which of the following is the embryo developed? Trophoblasts Inner cell mass Blastocoelen…

A: Embryo is formed from the  zygote and zygote is formed by the union of the male and female gametes.…

Q: are found in immature follicles,. are released during ovulation and may become fertilized. Select…

A: Oogenesis is the process wherein ova (female gamete) or egg is formed through a series of events…

Q: Place the number corresponding to the correct germ layer in the blank.   ____ Mesoderm ____…

A: During gastrulation, the hollow sphere of balls called blastula develops into a gastrula.…

Q: Then the makes that keeps the endometrium in the uterus. A. pituitary gland; HCG B. ovary; estrogen…

A: Hormones are the chemical molecules which acts as a chemical messenger for different body tissues…

Q: What is the third layer that forms as a result of gastrulation in some animals? mesoderm endoderm…

A: Gastrulation is the cycle during early stage advancement that changes the incipient organism from a…

Q: The placenta is formed from ________.a. the embryo’s mesenchymal cellsb. the mother’s endometrium…

A: Placenta is defined as the organ that develops in the uterus of the women during pregnancy. The…

Q: gametogenesis, a primary spermatocyte generates sperm, a primary oocyte generates eggls). 14 41 D4,4…

A: Introduction:-  Gametogenesis:-  Gametogenesis is the process of division of diploid cells to…

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: 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: 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: 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: What are the female gonads called?a. oocytesb. ovac. oviductsd. ovaries

A: Reproductive system is used for the sexual reproduction. Female internal reproductive organs include…