If identical human twins develop from separate placentas, when must the embryo have separated? When must separation have occurred if the twins share a common placenta but develop within separate amnions?

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 happens to the embryo after week 8? Select one: a. All organ formation has completed, so the…

A: Fetal development within the womb is called prenatal development. It is a process that occurs in…

Q: Are all of the cell nuclei in the embryo sac haploid or is just the egg haploid?

A: The group of organisms with eukaryotic cells having cell walls and autotrophic nutrition are called…

Q: At which stage of embryogenesis, major patterns of the internal tissues of the embryo have been…

A: Embryogenesis It is defined as a process which occurs after the process of fertilization of an…

Q: Why is knowing information about embryo development important

A: EMBRYO DEVELOPMENT:- It is the process of formation of the embryo, starts with the fusion of male…

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: What are embryophtes?

A: Plants are mainly multicellular organisms, predominantly photosynthetic eukaryotes of the kingdom…

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: 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: Why does the dispersion or contraction stage of the developmental cycle assume a complex character

A: Family development is a notional methodology for the orientation of the research and set an abstract…

Q: Compare the differences in the arrangement of the chorion, amnion and placenta in the formation of…

A: Identical twins, also known as monozygotic twins, are twins formed when a single egg is fertilised…

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: Compare and contrast embryogenesis and morphogenensis and Outline the difference of somatic…

A: Embryo  Embryo is the developing young one of multicellular organisms.

Q: When does meiosis occur in girls? In boys?

A: Meiosis is where a solitary cell divisions twice to deliver four cells containing a large portion of…

Q: During what embryonic stage can morphogenesis be seen?   Question 9 options:   a)  The morula…

A: Basically morphogenesis means the development of organs and organ system by the process 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: Which of the following rows correctly identifies the development of the germ layers? Select one:…

A: The germ layers are an embryonic collection of cells that aid in the creation and development of…

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: What are the types of twins and which of them share a placenta and amniotic sac ?

A: Twin pregnancies occur when the mother conceives two fetuses. Twins are classified based on the…

Q: Identify the events in embryonic and fetal development and their relative chronology.

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

Q: From what you know about embryonic development, do you think that a cell from the inner cell mass or…

A: The outer germ layer from which the nervous system is derived during embryonic development is called…

Q: Explain how the flat embryonic disc takes on the cylindrical shape of a tadpole.

A: The embryo is the first phase of the development of the offspring. The life cycle starts shortly the…

Q: What is developmental mechanism?

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

Q: When does an embryo become a fetus? Select one: a. When gastrulation forms the three primary germ…

A: At the end of the 8th week after fertilization (10 weeks of pregnancy), the embryo is considered a…

Q: Suppose we would want to have mirrored lateral sides (meaning both the left and right portion are…

A: The majority of animals have bilateral symmetry. They have anterior-posterior (A-P) and the…

Q: Where is the egg located in the archegonium?

A: In Bryophytes plants, the female and male sex organs are termed archegonia and antheridia…

Q: What are the correct pairings of developing and embryonic structures in the gastrulation of…

A: Note: Sorry, since you have posted multiple questions, as per the honor code we will be authoring…

Q: Suppose we would want to have mirrored lateral sides (meaning both the left and right portion are…

A: During the development of a chick embryo, Blastodisc growth occurs only in a small area of the egg.…

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: How is embryology different from developmental biology?

A: During their life cycles;most of the living organisms like plants and animals undergoes various…

Q: Are the similar structures among vertebrate species during embryogenesis homologous structures?…

A: The existence of similar structures in different species is one of the most important pieces of…

Q: Can sperm with DNA fragmentation fertilize an egg?

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

Q: What is the one defining characteristic that determines a mammal?

A: A) Well evolved creature, (class Mammalia), any individual from the gathering of vertebrate…