What structural adaptation in chickens allows them to lay theireggs in arid environments rather than in water?(A) extraembryonic membranes(B) yolk(C) cleavage(D) gastrulation

Q: Is the embryonicdevelopment in birds direct orindirect?

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

Q: What selective forces might limit the stage of development at which humans are born?

A: Introduction: The evolution of humans are influenced by the following five factors: Natural…

Q: Which is theextraembryonic membranewhose function is to storenitrogen wastes of theembryo? Is this…

A: The membrane that is known to assist the developing embryo is known as an extraembryonic membrane.…

Q: Is the mammalianembryonic development director indirect?

A: The process of embryonic development is otherwise known as embryogenesis. Fertilization is the…

Q: How do the shape and structure of the uterus of the fetal pig compare with that of the human?

A: Reproductive system is used for the sexual reproduction. Female internal reproductive organs include…

Q: How do the location and the relative size of the bulbourethral glands of the fetal pig compare with…

A: Reproductive system is used for the sexual reproduction. Female internal reproductive organs include…

Q: What do you call the movement in which the yolk plug is formed in amphibians?

A: Introduction:- The residual patch of endodermal cells generated after the formation of the dorsal…

Q: Why do mammalian eggs have a small concentration of yolk, while bird and reptile eggs have a large…

A: Eggs are divided into three types on the basis of the amount of cytoplasm present in them. They are…

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: 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: What experimental evidence demonstrates that molecular gradients in the egg control development?

A: Morphogens:          A substance that standardize a graded distribution and elicit distinct cellular…

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: what structure is the pointer pointing to? O Notochord what germ tissues are those structutres made…

A: There are different types of body structures, each specified for a particular function. These…

Q: Why are blastomeres in the pigmented part of the egg smaller and more numerous than in the…

A: The other terms associated with developmental biology include embryogenesis or embryology. This…

Q: Why are sea urchins have external fertilization? What are the adaptive advantages of external…

A: Sea urchins are significant herbivores on coral reefs, & in certain environments they assume a…

Q: describe direct and indirect development and name some animal groups that have each type of…

A: Difference between the direct ns indirect development is listed below.

Q: what characteristics are shared among bird embryos, pig embryos, and human embryos?

A: There are several similarities between the embryos of different species of animals and birds. It was…

Q: What mechanisms have evolved in animals with(a) external fertilization and (b) internal…

A: The process that involves fusion of the male and female gametes namely sperm and ovum respectively…

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: In a developing Chicken embryo, what is the fate of the postanal gut?

A: Postanal gut is the the extreme end of the alimentary canal.

Q: In what ways do a bull’s reproductive organ structures differ from that of the human? How are the…

A: The reproductive system(male and female) is a complex system with a number of interconnected…

Q: ''Because of the many later developmental trans-formations that produce the elaborately structured…

A: The germ layers develop early in embryonic life, through the process of gastrulation. Triploblastic…

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: what evolutionary advantages does the amniotic egg have? explain how each component of the egg plays…

A: Allow embryos to grow faster and to a greater extent before hatching. Animals are no longer reliant…

Q: are the essential similarities and differences between the development of sperms and eggs in mammals

A: Both sperm and ovum are haploid having 'n' number of chromosome.  Both undergoes mitosis as well as…

Q: In the 33 hr. chick embryo stage what structure/s would serve as a guide to approximately…

A: Auditory vesicles are distinct. Three pairs of arterial arches arise from the ventral aorta. Somites…

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: n your own words: Expound how the mass of inert yolk influences gastrulation in amphibians,…

A: In evolutionary biology, evolutionary developmental biology is considered a new norm. It developed…

Q: A mammalian embryo puts the trophoblast into a hurried frenzy before it decides to proceed to the…

A: Trophoblasts refer to the cells that produce the external layer of a blastocyst. They can be seen…

Q: Can the dorsal lip of the blastopore inducecells in another part of the amphibian embryoto change…

A: The dorsal lip of a blastopore is a structure formed during the early development of the embryo. The…

Q: Regarding mammals, amphibians, and reptiles, explain thoroughly in what way does the inert yolk's…

A: Evolutionary developmental biology is considered a new norm in evolutionary biology. It arose from…

Q: a

A: Primitive streak is a thickened epiblast structure of blastula that is formed during the embryonic…

Q: What structures are derived from the ectoderm, mesoderm, and the endoderm?

A: Embryology is the study of development and growth of fertilized egg(zygote) into mature embryo. The…

Q: In northern latitudes, a variety of birds and mammals createstorage depots of food, termed caches,…

A: Physiology of development The study of functional qualities at various phases of an individual…

Q: How do the eggs ovulated into the abdominal cavity find their way out of the frog’s body?

A: To understand the path of the egg we need to understand that frogs lay eggs. This process usually…

Q: In a developing chicken embryom, what is the fate of the postanal gut?

A: A postrectal extension of the embryonic hindgut to the cloacal membrane where the anal opening forms…

Q: Which statement does NOT accurately describe somites?   series of tissue blocks   form the ribs and…

A: Embryology is the study of development and growth of fertilized egg(zygote) into mature embryo. The…

Q: What structures carry the egg from the ovaries to the uterus? Are these structures the same in all…

A: Introduction The ovary is a female reproductive organ that produces an egg called an ovum. This goes…

Q: n the early stages of amphibian development, what layer is involved in yolk digestion? What is the…

A: Embryonic development proceeds through these stages - cleavage, blastula, gastrulation, and…

Q: Distinguish two mechanisms by which flatworms supply yolk for their embryos. Which system is…

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

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: Question #1 What is importance of pharyngeal pouches in development? Question #2 What duct empty…

A: Bile is a type of fluid that is made and released by the liver. Bile is stored in the gallbladder.

Q: What are homeotic genes and what is the “homeobox” contained in such genes? What is the function of…

A: A group of genes that control the pattern of body formation during the early development period of…

Q: What is the importance of the pharyngeal pouches in development? Discuss.

A: In embryology, pharyngeal pouch is defines as "any of a series of evaginations of ectoderm on either…

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: To what extent has mesoderm migrated in the blastoderm of the 24 hour chick embryo

A: After twenty-one days of incubation, a chick emerges from a fertile egg. On the surface of the yolk,…

Q: Explain: Is the degenerating blastocoel visible in the frog gastrula? How much yolk protrudes…

A: Introduction :- In early mammalian embryos, a blastocoel is a chamber that is filled with fluids,…

Evolutionary adaptations

Evolutionary adaptation is the process through which organisms adapt or adjust to their surroundings to increase the chances of survival, mating, and reproduction. An organism's behavior, physiology, and structure are adjusted or changed to make it more suited to its environment.