1st structure developed in odontogenesis: a- Tom's process. b- Mantle dentin. c- Stomodeum. d- Tom's fiber. e- Non of above.

Q: Is the feather on the right side of the picture an adult male, adult female or juvenile? O Adult…

A: The presence of feathers in birds is their unique feature. Feathers provide insulation to birds and…

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

A: Answer is d.) somites.

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: Study the sea star development slides, including early and late stages and identify the following…

A: Introduction :- Echinodermata is a phylum of marine invertebrates that includes starfish (also known…

Q: Odontoblasts are derived from a. Ectoderm b. Endoderm c. Histiocytes d. Undifferentiated…

A: Odontoblasts are derived from the innermost layer of dental epithelium, the dental papilla. The…

Q: The embryonic diska. forms between the amniotic cavity and the yolk sac.b. contains the primitive…

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

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: Which of these is mismatched?a. chorion—sense perceptionb. yolk sac—fi rst site of blood cell…

A: Animal development is the process in which a fertilized egg undergoes cell division and cellular…

Q: Explain the developmental and functional similarities and differences between:   1. Avian yolk…

A: Three fetal membranes are present in mammals; yolk sac, amnion, and allantois. Yolk sac and…

Q: Which of the following statements about gastrulation is correct? A. During gastrulation, the…

A: The embryonic development after 15 days of fertilization marks gastrulation.

Q: Which of the following occurs to the blastocoel during Xenopus development?     is replaced by the…

A: Xenopus It refers to the genus of highly aquatic frogs that are mostly found in the regions of…

Q: Arrange the following from first event to the last of odontogenesis   -DENTINOGENESIS  -AMELOGENESIS…

A: Introduction Odontogenesis:- It is the medical term used to describe the complex biological process…

Q: Define senescence. How would you measure senescence?  compare and contrast the two basic theories on…

A: The process of the growing old. In the  biology, the  senescence is a process by which the  cell…

Q: Which of the following statements relating to axis formation in chickens is FALSE? a. Henson's node…

A: A) true- Henson's node secretes proteins that antagonize BMPs and that protein is named as…

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

A: The correct option is C) albumen; allantois

Q: If an embryo was lacking HOX genes many problems might happen including this.. neural crest would…

A: The Hox genes' function in the embryo is to specify positional uniqueness instead of the formation…

Q: Read following statements A and B and choose the correct option. Statement-A : Taenia is…

A: Both Planaria and Taenia belong to the Platyhelminthes phylum in the animal kingdom.

Q: Which structure of the following forms the embryonic axis? Primitive streak Notochord Primitive knot…

A: Animal embryonic development, also known as embryogenesis, is the stage of development of an animal…

Q: The visceral mass of gastropods take a 180 degree turn during development. This causes the anus to…

A: Parthenogenesis is the reproduction without actual meiosis and fertilization. It occurs in lower…

Q: Draw and label parts of whole mount of chick embrogenesis specimens of the following stages:…

A:

Q: Which of the following describes the importance of the formation of the morula in early human…

A: The fertilization leads to development of the first diploid cell which is called a zygote. By day…

Q: -4. In the diagram below, the stages of development in a frog embryo are NOT arranged in the correct…

A: Gastrulation is the process where the blastomere cells undergo dramatic movements that leads to…

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: If the dorsal lip from a early gastrula is transplanted into a second embryo, which of the following…

A: Early embryonic development gives rise to the dorsal lip of the blastopore, a structure that is…

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: ASCARIS, CROSS SECTIONS Nerve Cord 1 FEMALE - Cuticle Nerve Cord Pseudocoel -Ovaries Testis…

A: Ascaris is a genus of parasitic roundworms that can infect the small intestine of various animals,…

Q: What are the pathways through which a neural tube defect can occur? Select one or more: V A. Failure…

A: We can say that The following three variables have played an important role in the assessment and…

Q: Which of the following structures give rise to pharyngeal (branchial) arches cranial nerves O Neural…

A: Introduction :- Pharyngeal arches are two structures that grow on either side of the growing…