What is NOT true about embryo development? A. a morula is an earlier stage than a gastrula B. Gatrulation creates endoderm and ectoderm in most animals C. Mammal blastulas are called blastocysts due to the thickened area where the embryo develops D. diploblastic animals have mesoderm

Q: Which form of reproduction can result from damage to the original animal? a. asexual b.…

A: Reproduction (or multiplication or rearing) is the natural cycle by which new individual creatures –…

Q: When do the oogonia undergo mitosis?a. before birthb. at pubertyc. at the beginning of each…

A: The female reproductive system is formed of the external and internal sex organs, which works in the…

Q: What two germ layers develop in the embryos of diploblastic animals? Check the two that apply.…

A: The two germ  layers of cells found in diploblastic animals are the outer ectoderm and the inner…

Q: Contrast developmental activities in embryos before and after they reach the mid-blastula…

A:

Q: What structural adaptation in chickens allows them to lay theireggs in arid environments rather than…

A: The vertebrate embryo requires an aqueous environment for their development. The amphibians and…

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: What are some advantages of the pronounced cephalization that occurred as vertebrates evolved from…

A: Answer- Animals are adapted and evolved so that they can survive and reproduce well. In tetrapods…

Q: Which statement is true of Spemann’s organizer?a. It is unique to amphibian embryos.b. It arises…

A: Answer is a.)  it is unique to amphibian embryos.

Q: What is the difference between a mesoderm and a mesoglea?

A: Diploblastic animals contain body wall which develop from 2 embryonic germ layer - ectoderm and…

Q: Compare the reproductive organs of reptiles and birds. How are their reproductive patterns…

A: Although anatomy and physiology varies greatly among the diverse class Reptilia, the basic structure…

Q: Compare the process of gastrulation in amphioxus and birds

A: Gastrulation is a process early in most animals' embryonic development during which the blastula is…

Q: Which type of cleavage leads to the development of a bird?

A:

Q: The outermost germ layer in a vertebrate gastrula is the____ . a. endoderm c. mesoderm b. ectoderm…

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

Q: In a reptile egg, the extraembryonic membrane thatencloses the embryo in a watery environment is…

A: Answer is b.) amnion.

Q: Why does continued breastfeeding decrease the chance of pregnancy? (Hint: Think about the effect the…

A: Hormones are the organic substances that are produced in small amounts by specific glands, which are…

Q: Which primary germ layer gave rise to the cells that eventually became the central nervous system?…

A: Introduction  Life starts from single cell called Zygote. Zygote is the single diploid cell resulted…

Q: Explain how the flat embryonic disc takes on the cylindrical shape of a tadpole.

A: The embryo is the first phase of the development of the offspring. The life cycle starts shortly the…

Q: Archegonium is an example of female gametangium in plants, which produce motile egg cell.

A: Ans- False Explanation- Archegonium is the female reproductive organ occurs in ferns, mosses and in…

Q: At what phase of development would a mouse embryo appear me similar to a chick embryo? Blastula…

A: THE STAGE OF DEVELOPMENTIS BLASTULA STAGE.

Q: Describe how you would determine the sex of a cane toad.

A: The cane toad is commonly known as the marine toad, it is an old species of toad. Its scientific…

Q: Explain the evolutionary advantage of the amniotic egg

A: Amnion is a membrane which enclose the embryo after it's formed.Embryo is the initial stage of…

Q: In what chronological order did the following traits evolve? a) First the mesoderm, second the…

A: The correct option is C First the amnion, second the mesoderm, third the notochord and fourth…

Q: You find a flatworm during a field trip and discover that the embryos undergo spiral cleavage. What…

A: The daughter cells are positioned in the grooves of the parent cells in a spiral division. The…

Q: During embryonic development, unique cell layers develop into specific groups of tissues or organs…

A: The development of a plant or animal embryo is called embryogenesis. This process starts with the…

Q: Newborns are at much higher risk for dehydration thanadults. Why?

A: A baby which is 2 months old from his or her birth is considered newborns.

Q: Using sea star embryos as an example, describe gastrulation. Explain how the mass of inert yolk…

A: Gastrulation is the process in the embryonic development of many animals. In gastrulation, there is…

Q: Compare and contrast gametogenesis in starfish and sea urchin.

A: Answer--

Q: Muscles are formed by the Group of answer choices   A. ectoderm B. mesoderm C. endoderm

A: Muscle is defined as a group or collection of muscle tissues that contract collectively to create…

Q: Fill in the blank: Eventually the amniotic cavity is surrounded by a double-layered membrane called…

A: Introduction: Fetal development undergoes a series of steps. To protect the fetus from any injury…

Q: During the evolution of animals , bilateral summetry accompanied cephalization . suggest a reason…

A: Evolution is the process by which an organism inherits or adapts favourable characteristics that…

Q: Assess the function of the uterine horns of the pig.

A: Anatomy can be defined as a branch of biology that is associated with the study of the organism’s…

Q: Both monotremes and marsupials lay eggs. have some embryonic development outside the uterus. are…

A: Introduction :- Mammals are divided into three types :- Monotremes , marsupials and mammals etc. The…

Q: Part IlI: Discussion 1. How can you distinguish an unfertilized egg from a fertilized egg? 2. As…

A: Fertilization is a natural phenomenon of producing mature male(sperm) and female(egg) gamete in…

Q: Which form of reproduction is useful to an animal with little mobility that reproduces sexually? a.…

A: Answer is d.)  hermaphroditism.

Q: Based on what you know about the goal of gastrulation, suggests the direct developmental consequence…

A: Embryonic development is the process of development of an embryo.  Gastrulation is a process that…

Q: Part B Using the Table Use the data from Table 1 in Part A to complete Table2. 1. Look at Table 1 in…

A: If the fertilisation occurs outside the body of the organism, it is known as external fertilisation…

Q: The process by which the structure labeled B is released from the structure labeled A is known as?…

A: The picture is showing the female reproductive system. It consists of ovary(A), Fallopian tube (C),…

Q: What is mesoderm? Name an invertebrate with mesoderm.

A: Introduction During embryonic development the three germ layers, ectoderm, endoderm and mesoderm…

Q: The folding of ectoderm on the top of the embryo during organogenesis produces...? Group of answer…

A: In humans, the folding of neuro-ectoderm gives rise to one of the most important structure i.e…

Q: Controlling for body size, would you expect a flightlessbird to produce eggs that are larger than,…

A: Flightless birds are birds that are unable to fly. These animals, which evolved from flying…

Q: What happened if there is an excessive secretion of prostaglandin during menstruation?…

A: Prostaglandins are derived from eicosanoids and has an action similar to hormones in animals they…

Q: The egg of a fish is what type of chordate egg and why? a. isolecithal b. telolecithal with total…

A: All fish eggs are surrounded by using an envelope, referred to as the zona pellucida (ZP), that…

Q: Among living animals, only birds have_____ . a. a cloaca c. feathers b. amniote eggs d. a…

A: Introduction :- The tissue that will become the female fetus's intestinal, genital, and urinary…

Q: Match the term to the correct description. + Allantois A. Fluid-filled membrane that protects the…

A:

Q: Observation of the development of embryos in sea stars shows the mesoderm forming pouches bulging…

A: Sea star classification: Kingdom       :      Animalia Phylum          :      Echinodermata…

Q: Which of the following is not true about avian eggs? Choose all possible answers. a. exhibit…

A: In development biology, cleavage is the process (following fertilization) that involves a series of…

Q: Expound how the mass of inert yolk influences gastrulation in amphibians, reptiles and mammals.

A: Answer  All these animals belong to vertebrate and vertebrates, possess much more amount of yolk as…