In human development, an embryo is most sensitive to chemicals, radiation, and pathogens during the first trimester because this is the time when a) tissues are differentiating b) organs are increasing in size c) the fetus grows rapidly d) fetal movements begin e) implantation occurs

Q: List the four primary tissue types of the adult body and identify which of the three primary germ…

A: A tissue is defined as a group of cells which are having a similar structure and are organized to…

Q: What are the major features of embryonic development at various months of pregnancy?

A: Within twenty hours after the fertilization, the zygote starts to divide rapidly into many cells.…

Q: What are three notable features between the fertilized and unfertilized egg?

A: Sperms and eggs are the gametes produced by male and female animals respectively in sexual…

Q: Describe the processes of fertilization, embryonic development, fetal development, and birth.

A: Answer- Every organism reproduces for their continuity of species. In sexual mode of reprodution the…

Q: What is the first major event that occurs during organogenesis?

A: Organogenesis is the formation and development of organs from embryonic cells or germ layers.  It…

Q: Explain the Human embryo at beginning of fifth week ?

A: The time between conception and birth of a baby is called the gestation period. A normal gestation…

Q: What is yolk? What is its role in fertilization and development?

A: The development of organisms depends on the supply of resources. In embryo development nutrition of…

Q: Describe the major events that transform a fertilized egg into an embryo?

A: BASIC INFORMATION  FERTILIZATION  It is the process of the fusion of the male as well as the female…

Q: What are Embryonic stem cells are used for?

A: ESCs (Embryonic Stem cells) or Human embryonic stem cells are used pluripotent cells which have the…

Q: What is embryos

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

Q: What is the significance of cleavage during the early stages of development?

A: The cleavage is the division of cells in the early stage of an organism. This implies that with each…

Q: What are the main functions of each of the extraembryonic membranes?

A: Foetal membranes are called extraembryonic membrane because they are not a part of the body of the…

Q: How do the somites, intermediate mesoderm, and lateral plate mesoderm contribute to embryonic…

A: The early stages in the case of embryonic development start with fertilization. The fertilization…

Q: What is an amnion?

A: The question asks about the amnion.

Q: What technology would enable a fetus born in the fourth month to survive in a laboratory setting?…

A: First of all, it is nearly impossible that four months (12 or 13 weeks) fetus can survive outside…

Q: Why does only one sperm fertilize the egg, and why is this important?

A: Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and…

Q: What are extraembryonicmembranes?

A: The embryology is the study of the formation and development of embryonic structures right from the…

Q: What structural features of the endometrium and myometrium contribute to their functions?

A: Uterus is one of the important organ of the female body. It serves many important functions in the…

Q: If identical human twins develop from separate placentas, when must the embryo have separated? When…

A: Reproduction is the biological process through which the new individual organism is produced from…

Q: What is the major function of the Placenta?

A: The placenta is an organ that develops in uterus during pregnancy. The placenta is the interface…

Q: What determines whether an embryo will develop into a male or a female?

A: The process of fertilization is the union of male and female gametes. It results in the formation of…

Q: Identify and describe the stages of human embryonic development

A: Stages of embryonic developement: Germinal stage ~ Fertilization, cleavage, blastulation,…

Q: What is the role of the HCG hormone in pregnancy?

A: HCG or Human Chorionic Gonadotropin hormone is one of the crucial hormones in pregnancy. Here we…

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: What is the first stage of labor in a pregnancy?

A: The first stage of labor and birth occurs when the regular contractions are felt. During the first…

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: . At what point during a pregnancy does this organ or system begin to develop, function, and become…

A: Note: Since you have asked multiple question, we will solve first question for you. If you want any…

Q: What is embryological development?

A: Embryo is defined as the early developmental stage of an animal. It is an embryo while it is in the…

Q: What happens during embryogenesis?

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

Q: Which hormones are secreated by the placenta to maintain pregnancy?

A: The placenta is an organ that develops in uterus during pregnancy.  The placenta is the interface…

Q: Why is fetal Hb essential for the survival of placental animals?

A: Hemoglobin is an oxygen transport protein in mammals. It is made up of four sub-units. Adult…

Q: what are the major events of embryo development? what are the major events of fetal development?

A: Embryo development as the name suggests the development or formation of the embryo. Embryo…

Q: Is an embryo a life?

A: Reproduction is a process through which an organism produces organisms of similar kinds. It is of…

Q: What is the time period of gestation in human beings?

A: The uterus of the woman plays a critical role in childbirth because the baby develops there.

Q: normal sequence of developmental stages is...

A: Correct sequence zygote--> morula--> blastocyst--> embryo--> fetus

Q: What is the technical term for the fertilized egg?

A: The process of fusion of gametes from male and female parents is called fertilization. The sperm is…

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: For successful reproduction to occur, various gonadotrophic hormones need to be involved. What…

A: Reproduction implies reproduction. Reproduction is the biological process by which an organism…

Q: What are implants? How do they help in preventing fertilisation?

A: Fertilization is a process of fusion of gametes, male and female gametes. In other words, it is a…

Q: How does the structural and biochemical changes during spermiogenesis help the sperm in…

A: Spermiogenesis is a process of maturation of spermatids into the mature spermatozoa.It is the final…

Q: What tissues and organs arise from the three germ layers in embryonic development?

A: In developmental biology, various stages are involved for the development of a foetus. Gastrulation…

Q: How can matter alone construct itself into the organized tissues of the embryo?

A: The embryo is the development stage in multicellular organisms. The development of the embryo begins…

Q: what is amniocentesis?

A: Prenatal genetic tests are conducted before the birth to detect any genetic disorder. It helps to…

Q: What are two important differences between the processes of spermatogenesis and oogenesis in…

A: The process of formation of gametes is called as gametogenesis. In the diploid organism, the gametes…

Q: Why would the absence of a father affect the timing of puberty?

A: Puberty is defined as the stage when a child starts to grow sexually. During this stage, physical…

Q: Why would a premature infant require supplemental oxygen?

A: If the infant is described as pre-mature means, the baby was born before the completion of the…