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: Which of the following are derived from 'trophoblasts'? 1.  epiblast 2.  hypoblast 3.  amnion 4.…

A: After fertilization of the egg and ovum, they produce zygote that start developing by repetitive…

Q: A preembryo has:- a. A neural tube. b. A heart bulge. c. A cytotrophoblast. d. A coelom. e. decidual…

A: Cell denotes the primary structural and functional unit of all living organisms. Scientists…

Q: Which of the following plays the greatest role in determining how cytoplasmic division occurs during…

A: Cytoplasmic division or Cytokinesis plays the role in separation of the the original cell, its…

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: 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: Regarding oogenesis, diplotene stage begins at a.birth b.Meiosis II c.7th month of fetal…

A: Diplotene is defined as the stage of meiosis II during which the homologous chromosomes remain…

Q: The number of chromosomes present in eurkaryotic cells a. is consistent during the life cycle b. is…

A: Eukaryotic cells consist of a nucleus and other organelles. Eukaryotic cells surrounded by the…

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: Which of the following is a major difference between spermatogenesis and oogenesis? a.…

A: The reproductive arrangement of an organic entity, otherwise called the genital framework, is the…

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: Describe how neurulation occurs. Why is it important?

A: The continuation of species in the world is due to the process of reproduction; either sexual or…

Q: Why is a second polar body expelled after fertilisation?   a)   To remove excess cytoplasm   b)…

A: The second polar body is a small, non-functional cell that is produced during oogenesis after the…

Q: The beginning of brain and spinal cord formation is termeda. cephalocaudal folding.b.…

A: Gastrulation process is characterized by formation of three primary germ layers, they are ectoderm,…

Q: Which of the following is the best explanation for the mechanism, of the action of the intrauterine…

A: D.A sterile inflammatory response of the endometrium prevents implantation.

Q: At fertilization, a sperm contributes   a. a diploid nucleus.   b. mRNAs.   c. a centrosome.…

A: At the time of fertilization the mail contributes haploid sperm and the female contribute ova…

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: 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: 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: Which of the following rows correctly identifies the stage in development and the embryonic age most…

A: Gestational age refers to the period of baby growth in the womb till birth. The period starts from…

Q: Component of bilaminar germ disc: a.Hypoblast and endoderm b.Epiblast and hypoblast c.Epiblast and…

A: INTRODUCTION       In the inner cell mass the bilaminar embryonic disc may formed two layers of…

Q: During asexual reproduction, the zygote develops into an embryo which turns to be an identical copy…

A: Asexual reproduction is the process of producing identical daughter cells without fusion of gamets.…

Q: Which of the following will result in identical twins?a. fertilization of two eggs by two different…

A: During fertilization, the sperm and egg recognize each other, the sperm fuses with the egg, joining…

Q: Which mechanism prevents an ovum from being fertilized by multiple sperm cells? Select one: a. When…

A: In internal fertilization, the occurrence of polyspermy or an ovum being fertilized by multiple…

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: 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: A female egg cell has two outer membranes how does the egg cell prevent polyspermy? if polyspermy…

A: Sexual reproduction refers to the form of reproduction that occurs through the union of male and…

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: What events occur during the first week after fertilization?Use the terms zygote, morula,…

A: Embryogenesis is the development of a plant or animal embryo. Embryogenesis follows a sequence of…

Q: : 1. Neural Crest Cells 2. Somites 3. Stem Cells

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: 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: Which of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c.…

A: The cell is known to be the fundamental unit of all life forms. Those who are similar in functions…

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: In-vitro fertilization occurs in the laboratory. The resulting embryos remain in a laboratory…

A: Fertilization The egg is viable for 12 to 24 hours after ovulation. Sperm are viable for 12 to 48…

Q: which of the following does not aid the sperm in fertilization? a. hyaluronidase & protease b.…

A: The sperm is the male gamete that is haploid (n) in nature. It is developed in the seminiferous…

Q: Which of the following undergoes mitosis?   A. Oocyte B. Myocyte C. Spermatocyte D. Both A & C

A: Mitosis- cells that undergo mitosis produces two diploid cells (2n) that are identical to each other…

Q: A) The correct order of chronological order of developmental events is a. 1.cleavage 2.…

A: Since you have asked two questions, we would be answering only the first. Post the second question…