9. It give some ideas on the developmental stages of certain animals * Chemical embryology Comparative embryology Descriptive Embryology experimental embryology 1. Which determines the arrangement of the embryonic membranes is-----

Q: A zygote is formed from the fusion of what two cells ?

A: two haploid sex cells

Q: 7. Which of the following best explains the development of twins? a. In the case of both identical…

A: The gestation period varies for twins and a single baby by around 2 weeks. The single baby is…

Q: Provide three differences of the endodermal parts of the 72-hour chick embryo with the 10 mm pig…

A: A 10 mm pig embryo is more complex than the 72 hour chick embryo. In 10 mm pig embryo, it developed…

Q: 1. Which is not a characteristic of life? * O They are composed of one or more cells. O They respond…

A: living and non living organisms are the two categories of organisms or objects present on the earth.…

Q: 3.The blue arrow is pointing to the region called ?

A: We can say that Embryogenesis is defined as the type of sequential dynamic process where the embryo…

Q: What do you think is the reason why there is a diverse way of reproduction both in plants and…

A: Fertilization is a process in which male gametes fuse with the female gamete to produce zygote which…

Q: The major organizing center of the gastrulating embryo is the A. Inner cell mass B. Primitive streak…

A: Note:- Sticking to our guidelines I have answered only ist three questions. Please ask rest of the…

Q: 3. (a) What are the four processes that drive embryonic development? (b) What two processes drive…

A: Embryonic development involves the stages of development from formation of a single celled zygote…

Q: 2. Compare and contrast gametogenesis of sperm and eggs in mammals. In your comparison, describe…

A: When the survival  time of living organisms is limited then the process which enables their…

Q: 2.  Match the tissue to the germ layer it develops from. Question   Epithelium   Central nervous…

A: We can say that The three germ layers are particularly seen in vertebrates during embryonic…

Q: What will happened to developing embryo if all vents in the incubator are closed.why

A: Eggshells contain three to six thousand small holes, called "pores", through which oxygenpasses from…

Q: 4. Into what cavity does the blastopore open? The gastrular slit? What becomes of each? 5. Explain…

A: Introduction :  The initial gut that develops during the gastrula stage is called the archenteron.…

Q: Explain the significance and describe the features of fertilization and cleavage in early animal…

A: Animal embryonic development is also called as embryogenesis. After the fertilization of the zygote,…

Q: List the stages of embryonic development and what happens at each stage

A: Human fertilization occurs when the haploid sperm cells fertilize the haploid gamete. Embryonic…

Q: Compare and contrast animals with external fertilization to those with internal fertilization. What…

A: Fertilization is a phenomenon in which male gamete known as sperm fuses of female gamete that is ova…

Q: 9.Which among the following choices lists the three phases of the ovarian cycle in the correct…

A: Ovarian cycle is a series of events that happens during a period, which contains the follicle…

Q: 9. What is parthenogenesis? 10. Humans can be classified as deuterostomes. Explain what that means.

A: Fertilization is a sexual reproduction process in plants that happens after pollination and…

Q: What defines an animal?  Pick all that are correct. Group of answer choices a.diploid b.reproduce…

A: Organism/ individuals contain lots of organ system . Organism are classified into 5 Kingdom . It…

Q: iv. Two nuclei cells in Stage W will be fertilized by two male gametes. State how the two male…

A: Blooming plants replicate physically through a cycle called fertilization. The blossoms contain male…

Q: Describe the development of the human embryo From the Formation of the Zygote to the point where the…

A: A human embryo is a distinct organism formed by either the first mitotic division after…

Q: When does an embryo become human? At fertilization? At gastrulation? At the initiation of brain…

A: Human embryonic development leads to the expansion and formation of the human embryo. It is…

Q: Answer the following questions: 7. What is the study of comparative embryology? 8. Are sperm and…

A: As per our guideline i can answer only one question but i gave you both of the answer in step 2 and…

Q: 1. What did calcium ions do during fertilization in sea urchins?

A: Sea urchins are free-living echinoderms that have venomous, sharp, brittle spines covering them as…

Q: Discuss the Distinguish the formation of cleavage snails embryos. 2. Distinguish the formation of…

A:

Q: What are the different mechanisms the egg employed to ensure that only one sperm cell will fertilize…

A: Polyspermy refers to fertilization of an egg cell by numerous sperms. It is avoided during…

Q: 3. Which is TRUE about asexual reproduction? A presence of zygote B. does not involve gametes C.…

A: According to guidelines we have to answer the first question only. so please kindly post the…

Q: Discuss the following terms: - asexual reproduction - nuclear membrane - reproduction - tetrad -…

A: Cell is the fundamental unit of life. Cell biology is the branch of biology that deals with the…

Q: 4. As the embryo develops, what do the amnion and the yolk sac become, respectively? a. A sac that…

A: The amnion is filled with the amniotic fluid due to which the amnion expand and provides protection…

Q: 7. The normal site of fertilization of an egg is in the

A: Note- As you have posted multiple questions we are solving first question for you. If you want rest…

Q: Which structures are responsible for maintaining levels of estrogen earlier and later in pregnancy?…

A: We can Say that Hormones are substances that are created in one part of an organic entity and moved…

Q: 2. Name the two ways fertilization can occur. a. Give an example animal that practices each. b.…

A: WHAT IS FERTILIZATION ? Fertilization is a process of combining of male gamete or sperm with female…

Q: Describe the development of the amniotic cavity, the bilaminar embryonic disc, the yolk sacs…

A: There are many different stages in the development of the fetus. After fertilization, the zygote is…

Q: Do you believe aborted fetal tissue should be used for transplant purposes? Why or why not? Do you…

A: In transplantation, organs from on person are transplant to another person.when organs of any person…

Q: 1. Which of the following layers protect the mammalian oocyte during ovulation? * a. cortical and…

A: Structure of mammalian Oocyte:  mature mammalian Oocytes have many layers before ovulation- Follicle…

Q: 7. Which sequence represents the correct order of events for the formation and development embryo?…

A: Reproduction is the process which is responsible for producing the young ones.

Q: 4. Hormone-based birth control methods deliver synthetic versions of progesterone in high…

A: To prevent pregnancy there are oral contraceptive pills which are used.  These piils can be used…

Q: Which round of cell division is uneven? (hint: the SEM images will be helpful) a)First b)Second…

A: During early development, sea urchins exhibit radial holoblastic cleavage.