8. The major event in the embryonic development of animals that results in a layered embryo is called Group of answer choices choanoflagellation transmogrification ecdysis compartmentalization desagellation gastrulation gelatinization cephalization

Q: The 72-hr Chick Embryo Whole Mount (SEE IMAGE) Again, before mounting your slide on the microscope…

A: In the 72 hour embryo, area opaca and area pellucida can not be seen Size of the extra embryonic…

Q: sexual reproduction in cnidarians may be carried out by which body form? A. Medusa or polyp   B.…

A: The creation of a copy of something, a copy of something, or the act of sexual intercourse to create…

Q: In humans, identical twins are possible because? a. cytoplasmic determinants are distributed…

A: Twins are two children born from the same mother. Twins can be monozygotic, which means they develop…

Q: 2. Compare and contrast gametogenesis of sperm and eggs in mammals. In your comparison, describe…

A: When the survival  time of living organisms is limited then the process which enables their…

Q: label all the distinct parts of the animal cell of spider's leg

A: Spiders have a few transformations that recognize them from different arachnids creature. All…

Q: 1- If a blastula splits in two and two fetuses develop, what is created?   a. Fraternal Twins…

A: Identical twins are produced when a single zygote splits into two identical zygote and are called…

Q: . A dextral snail will express nodal in? 4. Snail embryos with a sinistral coiling are? 5. The first…

A: Snails have shelled gastropods and are inhabited diverse environments such as land, seawater, and…

Q: Answer the following questions. 1. Where does a sea star embryo get its nutrition during prelarval…

A: Answer 1- A sea star embryo get its nutrition during prelarval stages of development from the…

Q: 4. State the reasons why fruit fly is an ideal model organism. Large size Short life cycle Have only…

A: Fruit fly is Drosophila melanogaster and is widely used organism as model organisms. Model organisms…

Q: Match the feature or description with the type of animal v Cells divide asymmetrically and not…

A: Protostome and deuetrostome are way to classify organisms based on the formation of anus and mouth…

Q: Indicate the Phylum, Class, Order, Family, Genus and the species name of any one grasshopper of…

A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…

Q: .Place the following events of the acrosomal reaction in the correct chronological order. (1) The…

A: The acrosome response is the acrosome's exocytosis, or the fusing of the acrosomal membrane with the…

Q: 21. 22. ( 23. 24. C 25. 26. 27. 28. 9. C If a frog zygote has ß-catenin mutation, the embryo will…

A: as per our guidelines we are supposed to answer only one question if there are multiple questions…

Q: Classify and diagram embryos on the basis of their: (a) yolk content, (b) cleavage types, (3)…

A: Cleavage in animals is depends upon amount of yolk. Yolk distribution can be complete ( holoblastic…

Q: Sponge archeocytes can differentiate into A. eggs (oocytes) B. sperm C. choanocytes…

A: Sponges are organised at a cellular level. They don't have any features that may be classified as…

Q: Which of these is not correct ? a) In mammals,acrosome reaction occurs when sperm contacts the…

A: In the above question all options are related to fertilization. Fertilization is a process Where a…

Q: many mushrooms produce toxins that can cause … a) death b) hallucinations c) severe illness d) all…

A: Many mushrooms produce toxins, Which can cause all the above options as they are, Death…

Q: 8) Base your answer on the following information and on your knowledge of biology Folic acid is a…

A: Folic acid is another name for Vitamin B9. It is mainly found in dark green vegetables such as…

Q: Describe how the reproductive structures of each organism are adapted towards the given…

A: Answer of the questions given below...

Q: 1. What do you notice to the embryos at their earliest stage? 2. Observe the embryos from their…

A: A multicellular organism's embryo is the first phase of development. Embryogenesis is the stage of…

Q: The volume of the sea Urchin egg is 5.2 x 10^5 µm3. You fertilize the cells and take measurements of…

A: a given volume of the sea urchin egg =5.2 x 10^5 µm3 using the formula volume of the sphere =…

Q: 6) In the cnidarians, Choanocytes, the cells responsible for filtration, are located in the…

A: The animals of phylum cnideria posses aquatic habitat as they inhabit the water bodies. Like…

Q: 1. What are the differences between unfertilized and fertilized egg? 2. Differentiate miolecithal,…

A: The process of  the fusion of haploid gametes, egg, and sperm, to form the diploid zygote is called…

Q: Based on the results, which conclusion is correct?   A. In sea urchins, only the fate of the…

A: Introduction: 'Sea urchins' also known as 'sea hedgehogs', are small, spiny, globular animals that…

Q: Place the following five steps in the correct order: ________ Deliver cloned baby ________ Remove…

A: In genetics and developmental biology, somatic cell nuclear transfer (SCNT) is a laboratory…

Q: Volume of the sea Urchin egg is 5.2 x 105 µm3 . You fertilize the cells and take measurements of…

A: BASIC INFORMATION  FERTILIZATION  It is the process of the fusion of the male as well as the female…

Q: 1: Make a diagram of the life cycle of a diagenetic fluke worm (Class Trematoda).  2: Highlight the…

A: Liver fluke is a parasite called Fasciola hepatica. The liver fluke completes its life cycle within…

Q: What is the advantage of the countercurrent gas exchange in the case of some molluscs? Why is it not…

A: Counter current involves blood in the capillaries flowing in the opposite direction to the flow of…

Q: In mammals, primordial germ cells migration ends when they reach the _________________   posterior…

A: Primordial germ cells (PGCs) are highly specialized cells that act as precursors of gametes, which…

Q: 3) In Annelids, the following devices are metamerized (organs distributed in each metamer):…

A: Metamerism Metameric segmentation or metamerism is an architectural body plan in some animals in…

Q: Which round of cell division is uneven? (hint: the SEM images will be helpful) a)First b)Second…

A: During early development, sea urchins exhibit radial holoblastic cleavage.

Q: Mature Medusa 1. Look at the life cycle diagram of a jellyfish species on the right. Immature Medusa…

A: (a) In the given diagram, there are four stages indicated in which first stage (1) shows the sexual…

Q: What is the difference between isolecithal and telolecithal? How may these features affect the…

A: Since there are multiple question in this particular question, I will answer your first one for you…

Q: 12.Place the following events of the acrosomal reaction in the correct chronological order.(This is…

A: Acrosomal Reaction:  A sperm must first fuse with the plasma membrane before penetrating the female…

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: 13 12 15 14 11 16 10

A: Embryology is the branch of biology that studies embryogenesis, or the formation of an embryo out of…

Q: 5. Animals which produce one or two egg cells during a single reproductive cyde are most likely to…

A: The fusion of haploid gametes i.e. the egg and sperm, resulting in the formation of the diploid…

Q: 1.What is the relationship of prolactin to hatching egg naturally?

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

Q: Can earthworms fertilize their own gametes? If they could, how would the offspring be compare to the…

A: Reproduction is the process by which the organisms propagate their species by the union of the male…

Q: Vhich iš true of gastrulation: occurs in Porifera results in a specific embryonic stage O forms a…

A: gastrulation is a phase early in the embryonic development of most animals followed by blastula.

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: mammals, primordial germ cells migration ends when they reach the _________________   posterior…

A: Premordial germ cells are only means of genetic transmission between parent and offspring.…

Q: Which of the following will NOT induce a second body axis in a host embryo? a. Transplanting a…

A: In developmental the expression of specific sets of genes usually determines the three axes of the…

Q: At a high level, animals can be placed into evolutionary groupings based on their pattern of…

A: The blastocyst is one the development embryonic stage of higher animals. Blastocyst has a cavity…

Q: You are studying reproduction in starfish (also known as sea stars).  You are able to successfully…

A: Sexual reproduction is the process in which the male and female gametes fuse together to form a…

Q: 1. .......................... is an increase in the number of normal cells of an organ or tissue.…

A: 1. HYPERTROPHY is an increase in the number of normal cells of an organ or tissue.

Q: What type of gastrulation is depicted from the diagram below? (A) Blastopore Blastopore 4A 4D 4c 4b…

A: The type of gastrulation depicted from the diagram is: Epiboly

Q: oblast becomes the: ___________________ 2. The hypoblast becomes the: ____________________ Provide…

A: The  hypoblast become 1. extraembryonic mesoderm 2. Yolk sac