In which type of animalsdoes the placenta exist? Whatis its main function?

Q: How many days does it normally take from the fertilisation of the egg up to birth of the baby?

A: The normal human gestation period is from thirty-seven weeks to forty-two weeks or 259 days to 293…

Q: During what process does the amnion envelop theembryo?a. embryonic foldingb. gastrulationc.…

A: The amnion refers to a membrane, which closely envelops the embryo when formed initially. It gets…

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: ___________________ fluid protects the embryo from jarred movements and provides a watery…

A: The embryo inside the womb of the mother grows in a sac like bag called the amniotic sac.  It allows…

Q: Describe briefly amniocentesis and its purpose.

A: The process of fertilization includes a sperm (male gamete) fusing with an ovum (female egg). In…

Q: embedded

A: The Uteroplacental circulation is the vascular contact that is present between the uterus and the…

Q: Define about  Spermatogenesis and oogenesis in mammals. ?

A: As we know all living organisms are made of  basic unit of structure and function called as cell.…

Q: What are the stages of egg cell development in humans?

A: Oogenesis is the growth process of a primary egg cell into a mature ovum in the human female.  There…

Q: What is the differencebetween amnion and chorion?

A: Both amnion and chorion are present during a woman’s pregnancy and are part of the extra embryonic…

Q: What is the embryonic sac?Which are the cells that formthe embryonic sac? What aretheir ploidies?

A: The angiosperms are vascular plants that produce flowers and fruits, and they belong to the phylum…

Q: Where are egg cells produced in a woman’s reproductive system? ____   Where does fertilization…

A: The biological system of an organism's reproductive system, also known as the genital system, is…

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 is embryos

A: Introduction  The life starts from single cell called Zygote. A zygote is formed by the fusion of…

Q: Why must animals be modifi ed in the embryo stage?

A: In this question, we will discuss the fundamentals of how humans have learned to manipulate genetic…

Q: What is an amnion?

A: The question asks about the amnion.

Q: The fusion of a sperm and an egg cell initally produces which of thefollowing?a. blastocyst d.…

A: There are 2 types of cell namely somatic cells and germ cells. Germ cells are aimed to produce…

Q: Compare the functions of the reproductive system inmales and females.

A: Reproduction is not the necessary process for the means of survival but this process is very vital…

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

A: Answer is b.) amnion.

Q: What would happen if two sperm fertilized the same egg cell? If twosperm fertilized two egg cells?

A: Step 1 Fertilization and implantation is the process of fusion of two types of gametes (spermatozoa…

Q: What happenes if fertilization doesnot takes place in utreus?

A: Humans, as mammals, have the capability to reproduce sexually. Sexual reproduction requires the…

Q: Where does fertilization of the egg by the spermtypically occur?a. vaginab. uterusc. uterine tubed.…

A: Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete…

Q: Explain the purpose of the vagina and uterus in thefemale reproductive system.

A: The basic fundamental difference between males and females is the reproductive system and its…

Q: Define ectoderm and andoderm?

A: Except the sponges, the growing embryo in all animals develops different layers of cells called as…

Q: ow are the testes and ovaries similar

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

Q: What is the function of the placenta?

A: Placenta is formed after implantation of the embryo has occurred on the uterine wall. It is a…

Q: Which tissues and structures develop from ectoderm? frommesoderm? from endoderm?

A: During organic process, 3 primary germed layers, called exoderm, endoderm, and endoderm are shaped…

Q: Which of the following extra-embyonic membranes become the embryonic portion of the structure…

A:

Q: In the animal kingdom, only primates menstruate. Other mammalscome into season, or “heat,” during…

A: The oestrous cycle or estrous cycle is the set of recurring physiological changes that are induced…

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: How are animals classifiedaccording to the germ layerspresent in their embryonicdevelopment?

A: Germ layers are developed during embryogenesis. They are programmed to develop specific organs,…

Q: What is the period from the woman's ovulation to the start of menstruation called? a) The uterine…

A: There are two types of reproductive cycles in mammals. These are the Estrous cycle and the Menstrual…

Q: w does the fertilized egg give rise to the adult

A: Life begins with a single cell known as a Zygote. The single diploid cell produced by the merging of…

Q: Occasionally, two primitive streaks form in one embryonic disk. Predictthe result. What happens if…

A: Primitive streak : A primitive streak is defined as a transient structure that forms during the 15…

Q: How many eggs are released by a human ovary in a month? How manyeggs do you think would have been…

A: The ovary is an organ present in the female reproductive system that produces an ovum (egg cell).…

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 happens if fertilization takes place in utreus?

A: Reproductive system (or genital system) is used for the sexual reproduction. The female attains…

Q: Where oogenesis does takes place. Describe the stages of this process?

A: Diagrammatic representation of oogenesis: -

Q: What happens during embryogenesis?

A: After the process of fertilization, the process of zygote development starts to form an embryo and…

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: Name some organsims which practice asexual reproduction.

A: Every organism needs to grow in order to survive. This can be done by the method of reproduction in…

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

A: Fertilization is the process of fusion between haploid male and female gametes to form diploid…

Q: Concerning reproductionwhat is the function of thetesticles?

A: Introduction: Testicles are one of the male reproductive organs called as male gonads. These are…

Q: Which structure is part of the female reproductive organ? A (A) A (B) B (C) C (D) D

A: The flower contains many parts such as stamen, pistil, sepals, petals and nectar glands. Flower is…

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 is the part of thefemale reproductive systemwhere fecundation occurs?

A: The biological process in which a new individual is produced from a parent is called reproduction.…

Q: What are gonads? What arethe male and the femalegonads in humans?

A: Reproduction is the biological process by which new individual organisms – offspring, are produced…