How is the avian feather formed? What patterns the placement of the feather bud placodes?

Q: List the advantages of evolving a deuterostome pattern of development.

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Q: Is the embryonicdevelopment in birds direct orindirect?

A: Animal developmental process can be direct or indirect. Direct development: It refers to the…

Q: How do major changes in characters evolve, and how do new features originate?

A: The change in the heritable characteristics of the species across many generations is called…

Q: What parts are persistent throughout the development of the embryo? Why are these present in all the…

A: Answer

Q: Compare and contrast between the following: (1) Area pellucida and area opaca (2) Amphibian…

A: 1) Area opaca is the region where the developing embryo is resting on the yolk. Area Pellucida is…

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: What are limb buds?

A: Vertebrates have three basic germ lines in the developing embryo. The outermost ectoderm, the middle…

Q: What is a vestigial structure? What are some examples of vestigialstructures in humans and other…

A: Vestigiality is the retention during the process of evolution of genetically determined structures…

Q: What are the archenteron and the blastopore? What is the stage of the embryonic development in which…

A: Gastrulation is the phase in the embryonic development of animals. During this phase, the blastula…

Q: what will the plumule become after the embryo grows? what will the radicle become after the embryo…

A: After the seed receives the necessary conditions for growth such as water, oxygen, right…

Q: hat parts are persistent throughout the development of the sea urchin embryo? Why are these present…

A: A multicellular animal arises from a single cell a fertilized egg. During development ,the cell…

Q: Explain the development of a feather?

A: The epidermal growths which form distinct outer covering or plumage in aves are known as Feathers.…

Q: Analogous structures perform similar functions but do not arise from common ancestry. What explains…

A: Comparative anatomy is the study of the similarities and differences in the specific dtructures of…

Q: What is the difference between homeotic and Hox genes

A: Thank you for the question  Answer : Homeotic genes : Genes which regulate the formation of…

Q: Where is the egg found in seed plants?

A: Seed plants are a group of plants. Gymnosperms and angiosperms form the group. Their seeds have…

Q: What are the notable features of the fetuses of penguin, panda, and snake that they have in common?

A: Vertebrates include five major classes i.e., Pisces, Amphibia, Reptilia, Aves, and Mammalia. They…

Q: State the neuromere origin of each brain region?

A: Introduction Neuromeres Are Known As The Segments Of The Neural Tube That Forms The Embryonic Brain…

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

A:

Q: Describe the four membranes in the avian egg. How does EACH membrane affect the developing embryo?

A: Avian egg development.

Q: Compare and contrast polyp and medusa form. How is the polyp form advantageous over medusa and vice…

A: Cnidaria is the phylum that belongs to subkingdom Eumetazoa and kingdom Animalia. There are about…

Q: What is developmental mechanism?

A: In biology, a mechanism is a system of causally interrelated elements and processes that result in…

Q: Explain Segment identity is preserved throughout development?

A: Drosophila is a genus of small flies whose members are often called fruit flies. It has segmented…

Q: What  similarities  do  the  illustrations  have?  What are the differences?  What trends do you see…

A: Comparing different embryonic stages of different animals is a tool that can be used to infer…

Q: Which letter is pointing to the female Ascaris?

A: Kingdom Animalia is a vast kingdom which comprises of animals.  It is divided into vertebrates and…

Q: How does developmental biology provide evidence of a common ancestry for vertebrates as diverse as…

A: Evolution is a gradual change that occurs in populations. Mutation, genetic drift, natural…

Q: What mechanism determines differentiation of fore limb VS hind limb?

A: Answer: Introduction: Limbs means legs and arms present in humans.Forelimbs that are present in the…

Q: What are the differences in the development of plants and animals in terms of the following?

A: The growth patterns of plants and animals vary in many ways as plant body may be gametophytic or…

Q: Is the sulcus limitans present at the 72-hour stage? State the derivatives of the sacculus and

A: Embryo development is a process that occurs after the process of fertilization has occurred and the…

Q: Why is it more difficult to determine the sex of a newlyhatched canary than a newborn puppy?

A: A sex-determination mechanism is a physiological system that controls how an organism's sexual…

Q: How do we know some fish did push-ups? What is the evidenc? B. When did most of the major human…

A:

Q: Are the skeletal plates of Blue Sea Star arranged regularly or irregularly?

A: Sea stars, additionally called starfish, are marine invertebrates of the class Asteroidea (phylum…

Q: goat but are

A: introduction  knowledge of the peripheral nervous system and vertebral column anatomy is important…

Q: what is the process which involves in the self-destruction of cells in the developing embryo as…

A: Ans: The process which involves the self destruction of cells in the developing embryo is very…

Q: What are the characteristcs of bilateral animals?

A:

Q: How do the tissues that form a bird’s wing relate to the tissues that form a fish fin or a human…

A: Comparative anatomy involves the differences and similarities in the species structures. The body…

Q: How does von baer's law of development relates with the development of the frog embryo? evidences?

A: Von Baer's laws of development These are rules proposed by Karl Von Baer. The laws demonstrates the…

Q: Explain the developmental and functional similarities and differences between: Avian amnion and…

A: The membrane , that closely covers the human and various other embryos when first formed, it is…

Q: What is the difference between radial and spiral cleavage?

A: Cleavage is defined as the process in which division form the cells and eventually the new organism.…

Q: Have the head fold and tail fold fused to form the amniotic cavity?

A: Answer: Introduction:  Embryonic development is also known as embryogenesis, is the growth of an…

Q: Is parental care of a species a factor that affects embryological development? If so, how?

A: Embryological Development -- Embryological Development also called as Embryogenesis a complicated…

Q: What are the consequences of the differences in the yolk amount and distribution of eggs among…

A: The amount and distribution of yolk inside the egg decides the pattern of cleavage. The type of…

Q: y define budding, fragmentation, and parthenogenesis, and provide some examples of animals that use…

A: Asexual reproduction is a type of reproduction that does not include the combining of gametes or a…

Q: Give an account of a quill feather?

A: Feathers refer to epidermal growth, which form distinct plumage or outer-covering of aves and few…

Q: How are the clock and the determination front connected to the role of Hox genes?

A: Developmental processes in vertebrates are regulated by genes.

Q: In a chicken embryo, What is the double membrane separating the pharyngeal pouch and furrow?

A: The animal body is a very complex creature made up of several systems. Each system in the body has a…

Q: What are the physical similarities exist between each of the embryos? How does the pattern of…

A: Introduction: Evolution refers to the change in the species with time. Every single species living…

Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.