How does amount of yolk affect cleavage? Compare cleavage in a sea star with that in a bird

Q: Explain how the structure of the placenta prevents mixing of fetal and maternal blood while allowing…

A: -First to understand placenta .  Placenta -- It is composed of fetal part which includes the…

Q: In a developing chicken embryo, what mesoderm lines the amniotic cavity?

A: The amnion, chorion, yolk sac, and allantois are the four extraembryonic membranes found in amniotes…

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: Which embryonic germ layer lines the outer surface of the embryo

A: An embryo is the early stage of human development in which organs form critical body structures.

Q: Where does fertilization takes place in human female?

A: The human female reproductive system includes a pair of ovaries, oviducts, uterus, vagina, vulva,…

Q: How are the ovum and spermatozoa transported to the site of fertilisation? Describe the process of…

A: Fertilization is a natural life process that involves the union of male and female gametes,…

Q: Describe the fertilization process and how an egg prevents fertilization by more than one sperm?

A: The reproductive system of the body is one of the important systems of the human body which ensures…

Q: How does oviposition occurs in female turtles. Provide the pathway involved in the oviposition…

A: Answer :- As we know that Males have a couple of penises that pass sperm from their cloaca to the…

Q: What are the hormones involved in milk production and milk secretion? Discuss the hormonal control…

A: The mammary gland is located in the anterior thoracic wall. They are composed of the tubuloalveolar…

Q: What Causes the End of Cleavage in a Frog Embryo?

A: All frogs reproduce sexually, but instead of the fertilization taking place inside the female, it…

Q: Compare the structures of the egg and sperm. What structural modifications do sperm have that…

A: The process of producing new organisms from the pre-existing ones is called reproduction. It may be…

Q: Explain the way in which the egg gets prepared for fertilization during oogenesis.

A: The process through which the male and female gametes combine to create the zygote is known as…

Q: Which structure connects the embryo to the placenta?

A: Umbilical cord

Q: pig fetus  Describe how the developing fetus exchanges material during pregnancy.

A: The placenta is a membrane, which surrounds the developing fetus during pregnancy. It provides…

Q: What are some of the uses for the yolk from the fleece of a sheep?

A: Sheep are quadrupedal, ruminant warm blooded creatures normally kept as domesticated animals. Like…

Q: What is the differences between Mammals and Frogs in Spermatogenesis?

A: Gametogenesis is the process of manufacturing gametes or daughter cells in gamete-producing mother…

Q: Where does fertilization take place in human body.

A: Humans are the multicellular complex organism and reproduce by sexual mode. This mode of…

Q: How is an egg (oocyte) prepared during oogenesis for fertilization? Why is preparation essential to…

A: Oogenesis is defined as the process by which the female sex cells or ova or egg cells are produced.…

Q: Does the distribution of Ca²+ in an egg correlate with formation of the fertilization envelope?

A: During fertilization, sperm-induced rise in cytoplasmic Ca2+concentration.

Q: What triggers activation of the egg?

A: The sperm of several species are attracted to the eggs of their own species by the process of…

Q: How is the process of gastrulation accomplished in mammalian embryos?

A: In developmental biology Gastrulation is the process that take place in the early embryonic…

Q: The archenteron develops into(A) the mesoderm.(B) the endoderm.(C) the placenta.(D) the lumen of the…

A: Gastrulation is the process of reorganization of the blastula, a hollow structure into a two or…

Q: Which statement accurately describes what occurs during the follicular phase of the ovarian cycle?…

A: ANSWER The first half of menstrual cycle is follicular phase and it starts first day of menstrual…

Q: If the egg is NOT fertilized, the lining of the uterus will shed.  This is called?

A: In the event that the egg is fertilised by a sperm cell as it goes down the fallopian tube,…

Q: what are the functions of the placenta

A: The question asks about the placental functions.

Q: How does the fertilized egg give rise to the adult body?

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

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: How is the yolk formed in terms of embryogenesis

A: Embryogenesis is the course of improvement of an undeveloped embryo from the zygote. In…

Q: The placenta function to Select one: A. Produce blood cells B. Provide nutrition for the growing…

A: The placenta is a temporary, membranous, vascular organ that develops in females during pregnancy.…

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: Diagram spermatogenesis in mammals. Begin with a spermatogonium possessing six chromosomes;…

A: Chromosome is a compact structure of a DNA molecule wrapped around some proteins. It is generally…

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: What are the defferent mechanism the egg employed to ensure that only one sperm cell will fertilize…

A: Polyspermy is a fatal condition in which several sperm nucleus engage with the female nucleus.…

Q: What happens to the second sperm nucleus, the one that does not fertilize the egg cell? What is the…

A: Sexual reproduction is a fusion of male and female gametes to produce offspring from the zygote.…

Q: How is and egg (oocyte) prepared during oogensis for fertilization? Why is preparation essential to…

A: The process of formation of gametes is known as gametogenesis. In females, oogenesis is a process of…

Q: Where does fertilization normally takes place in a human female.

A: Fertilization is the process of fusion of female gamete (ovum) and male gamete (sperm). Both the…

Q: What specifically will happen if multiple sperm were able to fertilize one egg during fertilization?

A: It can lead to  polyspermy. When the sperm fuses with the egg, it triggers the release of calcium…

Q: How does the embryo get nourishment inside the mother’s body?

A: Embryo means the developing offspring from the time of approximately 2nd to 8th weeks after the…

Q: In traditional accounts of fertilization, which characteristics are associated with eggs, and which…

A: The female reproductive cell, or gamete, in most anisogamous species is the egg cell, or ovum…

Q: What is fertilized egg known as?

A: Fertilization When male gamete fuses with female gamete, this process is known as fertilization.

Q: During the embryonic developmen, the trophoblast will developed into  Select one: A. The embryonic…

A: Developmental biology focuses on the study of developmental sequences of organisms. The embryonic…

Q: What happens in the process of fertilization in animals and humans?

A: The cells of the biological unit of life. the cells comprise tissues which collectively forms an…

Q: What is the function of tail in the sperm.

A: Reproduction is the process that ensures the continuity of species on earth. It is the main feature…

Q: Which sequence details the maturation of an oocyte and the process of ovulation? 1. Graafian…

A: The process of follicle and oocyte maturation occurs simultaneously in the ovary of females. The…

Q: What occurs in the female after fertilization of the egg? What happens if the egg is not fertilized?

A: The menstrual cycle refers to the monthly series of changes that a woman's body undergoes in order…