Amniotic eggs, compared to non-amniotic eggs, are a useful adaptation for

Q: Is the type and pattern of the cleave of an egg the same to all species of animals?

A: During the mitotic division, the cytoplasm of the egg is divided into multiple parts which then…

Q: This TRUE of enterocoely. O Results in the formation of coelom. O Results in processes in protostome…

A: Embryonic development refers to the development of a multicellular embryo from a fertilized egg.…

Q: an amniotic egg was crucial to the evolution of vertebrates because it provides the following to the…

A: The amniotic egg was the crucial evolutionary step that allowed the living organisms to breed…

Q: Explain the advantages and disadvantages of self fertilization in these flatworms

A: Flatworms are the organisms that belong to the phylum “Platyhelminthes’. These organisms are…

Q: In the deuterostomes the digestive tract (Gut) forms from the cells of the a) ectoderm b) nerve…

A: Deuterostome are type of division of animals in which blastula of developing embryo becomes anus…

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

A:

Q: Investigate how the mass of the inert yolk affects reptiles, mammals and amphibians gastrulation

A: The development of multi-cell organic entities starts from a single celled zygote, which goes…

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: Which of the following is develops into the archenteron? A. the placenta B. the endoderm C. the…

A: Placenta is an organ which helps in providing oxygen and nutrients to growing baby and removal of…

Q: During the embryological development of chordates, the midline dorsal layer of ectoderm folds in on…

A: In humans (a chordate), by the end of the third week of gestation, three basic germ layers…

Q: The Virginia opossum, or possum, is the only North American marsupial. Describe how its young are…

A: Marsupials are mammals with a marsupium. Marsupium is the pouch within the organism is a…

Q: postanal gut?

A: Introduction  Take out of digestive Cdx2 produces various results relying on the formative stage at…

Q: Aquatic animals in which fertilisation occurs in water are said to be: (a) viviparous without…

A: Animals show two types of fertilization that includes external fertilization and internal…

Q: In terrestrial arthropods, fertilization is always internal (True/False)?

A: Arthropoda is the largest phylum in the animal kingdom, which includes such familiar forms as…

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: Match the germ layer with the correct derivative Gastrodermis v [ Choose ] Ectoderm Endoderm…

A: There are 3 germ layers ectoderm, mesoderm and endoderm giving rise to different organs in…

Q: Compare human and sea urchin development prior to and after the gastrula stage.

A: Changes in cell shape and mobility(movements) are critical during early development because the…

Q: Compared to eutherians, marsupial placentas are more highly developed. o marsupial nipples are…

A: Marsupials and Eutherians all have evolved from ancient mammals. Regarding their method for bearing…

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: If the egg is not fertilized in mammals, the endometrium is shed as

A: Introduction: The inner layer is the endometrium. During a woman's menstrual cycle, hormones cause…

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: 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: Gastrulation in birds and mammal

A: Gastrulation is the process during embryonic development that changes the embryo from a blastula…

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: Show a model of female reproductive system of turtle showing structures and pathways during…

A: An early scientist who made useful noteson the status of the sea turtle reproductivetract was J. R.…

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: 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: Spermatogenesis and oogenesis

A: Oogenesis is the growth process where the primary egg cell or ovum becomes a mature ovum. There are…

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: Briefly explain how and why the yolk distribution in mammalian eggs has changed from their…

A: According to Bartleby expert, when multiple questions are posted we are allowed to answer the first…

Q: What distinguishes an amniotic egg from eggs laid by other animals, including fishes, amphibians,…

A: Amniotic eggs are eggs layed by reptiles and birds. The organisms which lay these eggs are called…

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: Explain gastrulation in fish

A: Gastrulation in Fish: - Gastrulation is defined as a process in which gastrula is formed from a…

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: Describe embryonic gastrulation in protostomes vs. Deuterostomes

A: Protostomes:  The clade of animals originally thought to be characterised by the formation of the…

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: In protostomes and deuterostomes, the space between the endoderm and the ectoderm is important…

A: The space between the endoderm and the ectoderm is important in the evolution of protostomes and…

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: 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: 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: Number these steps in vertebrate embryogenesis in order.       ______  formation of archenteron…

A: The embryonic development begins after fertilization that involves fusion of male and female…

Q: While the aminotic egg offers many advantageous, it also has limitations. Which of the following is…

A: The evolution of the amniotic egg is one of the most important evolutionary steps which leads to the…

Q: Label the parts of the Amphibian Spermatogenesis and Oogenesis.

A: Oogenesis is the process of formation of ovum from germ cells in female ovaries.

Q: State the differences of the frog and human embryology.

A: Embryology is the branch of science that deals with the embryo and the embryonic development. Frogs…

Q: hat happens when the egg is not fertilized

A: Answer: FERTILIZATION : It is the process of fertilize the egg cell of female with sperm cell of…

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…

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…

Tissue renewal

In multicellular organisms, tissue is a level of structure that consists of a group of physically and functionally identical cells and their intercellular substances. Unicellular organisms do not have tissues. Tissues are absent or poorly differentiated even in the simplest multicellular animals, such as sponges. However, more evolved multicellular animals and plants have specialized tissues that may organize and govern an organism's reaction to its surroundings. The word tissue is derived from the Latin word 'weave.' Plants and animals have various kinds of tissue systems that differ in their work and composition according to the different requirements.