Define chordamesoderm

Q: a. How many spermatozoa does one secondary spermatocyte produce?   b. Where in zygote does the first…

A: The male gamete "sperm" fuses with the female gamete "Ovum" and after this fusion "Zygote" develops.…

Q: Explain the process of spermatogenesis and oogenesis in vertebrates.

A: Spermatogenesis is the by which sperm cell develops. Oogenesis is the growth process by which the…

Q: How is the mesoderm(third germ layer) oftriploblastic animals formed?

A: The germ layers develop early in embryonic life, through the process of gastrulation. Triploblastic…

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: 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: State some functions of amniotic fluid.

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

Q: 12 10 13

A: The life of multicellular organisms start in a single cell called zygote which is formed after…

Q: Name two structures derived from each of the three embryonic tissue layers: endoderm, ectoderm, and…

A: Two structures derived from each of three embryonic tissue layers are : Endoderm  gives rise to…

Q: Distinguish between parthenogenesis and hermaphroditism.

A: The biological process through which an organism produces its offspring from its parents is called…

Q: What is cephalization? How does lateral symmetry favor cephalization?

A: Symmetry is the balanced distribution of duplicate body parts or shapes within the body of an…

Q: Cleavage produces daughter cells called ________.a. trophoblastsb. blastocystsc. morulaed.…

A: Cleavage is described as the procedure of cell division in early embryo to generate a cluster of…

Q: What is the difference between a mesoderm and a mesoglea?

A: Diploblastic animals contain body wall which develop from 2 embryonic germ layer - ectoderm and…

Q: Define segmentation, and give two examples of segmented structures in the embryo.

A: The science that investigates the processes by which multicellular organisms like plants and animals…

Q: Write the Patterns of embryonic cleavage and whole mechanism of cleavage. Write gastrulation in sea…

A: Cleavage is the division of cells in early embryo. There may be equal or unequal divisions.

Q: In terrestrial arthropods, fertilization is always internal (True/False)?

A: Arthropoda is the largest phylum in the animal kingdom, which includes such familiar forms as…

Q: Distinguish between modes of mesoderm formation

A:

Q: A gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the…

A: In developmental biology, gastrulation is a stage early in the embryonic development of many…

Q: Distinguish the structures of the female reproductive system that (a) produce the egg, (b) transport…

A: Sexual reproduction is a type of reproduction in which organism under goes different cycles like…

Q: Define the function of ova and avary in female reproductive system of frog?

A: The female reproductive system in frog has a pair of ovaries, a pair of oviducts that open into the…

Q: What is ejaculatory duct and its function in cockroach?

A: Cockroaches (Periplaneta americana) fall under the phylum Arthropoda of the class Insecta.

Q: Name the embryonic membranes and give the importance of each

A: Embryonic membranes are the membranes that lead to the development of the embryo in the mother's…

Q: Name the three embryonic tissue layers of vertebrate embryos,and describe the process by which they…

A: Gastrulation is the cycle where differentiated cells from the zygote move to their particular areas.…

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: Identify the structures of an egg and a sperm that aredirectly involved in fertilization.

A: Fertilization is that the method by that the male and also the female gametes (sperms and therefore…

Q: Define ectoderm and andoderm?

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

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: Label each tissue with the specific source germ cells: v Gastrointestinal tract A. Intermediate…

A: We are tripoblastic organisms that means we contains three types of germ layers that includes…

Q: Umbilical cord contains A allantois B yolk sac C arteries veins

A: The umbilical cord is a stretchable, tubular  structure which joins the fetus to the mother during…

Q: Explain the implantation of blastula and differentiate the embryonic from extraembryonic tissues.

A: The development of multi-cellular organisms begins from a single-celled zygote, which undergoes…

Q: Sketch scrotum and outline each part with explanation.

A: The scrotum is a skin pouch that hangs from the body between the legs at the front of the pelvis. It…

Q: Give technical name of female used to bring up in vitro fertilized egg to maturity.

A: Pregnancy is also termed as gestation during which one or more offspring develop in the uterus of a…

Q: oviposition for

A: Oviposition is the process of expelling eggs from the oviduct to the external environment.

Q: Which embryologic tissue develops into the spinal cord (mesoderm/ectoderm/endoderm)?

A: The formation of the embryo is one of the defining features of sexual reproduction. This embryo…

Q: Mention function of testis in humans?

A: The male reproductive system contains scrotum, testes, sex glands, penis, and spermatic ducts. All…

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: Name the process of embryo connecting with uterine wall of mother.

A: Embryonic development is the development of embryo from fertilised egg and its subsequent…

Q: Explain gastrulation in fish

A: Gastrulation in Fish: - Gastrulation is defined as a process in which gastrula is formed from a…

Q: Illustrate an egg in early cleavage, distinguish this stage from thise that follow (2,4,8 cell…

A: In developmental biology, several stages are there which determines the development of the fetus…

Q: 12. 11 13 10

A: Chick embryo The development of fertilised chicken egg is termed a chick embryo. It is extensively…

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 is mesoderm? Name an invertebrate with mesoderm.

A: Introduction During embryonic development the three germ layers, ectoderm, endoderm and mesoderm…

Q: Gastrulation is brought about by an invagination of the blastula. True or False?

A: It is true.

Q: An early stage embryo consisting of mutiple layers is a blastula O True False

A: In mammals, a blastula is an initial phase of embryonic development.

Q: Name the fully developed part of ovary containing egg.

A: The fully developed part of the ovary containing egg is called Graafian follicle and the associated…

Q: differentiate spermatozoon vs. ovum

A: Spermatozoon is a male gamete, which is produced in the testes of males. It is motile in nature. It…

Q: Draw an annotated diagram of the mammalian female reproductive system, making sure to label (name…

A: The female reproductive system presents various purposes. The ovaries provide the egg cells, named…

Q: Define oestrus cycle.

A: Sexual reproduction in most mammals is regulated by endocrine changes by secretion and inhibition of…

Q: Gastrulation occurs to form which three tissues? O hypoblast O ectoderm mesoderm O endoderm O B, C,…

A: During the early stages of embryo development, a multitude of signals are being released, some of…

Q: Enlist any two functions of a female placenta.

A: A fetus is the unborn offspring of an animal that develops from an embryo. The placenta is a…