In humans, the development of fertilised egg takes place in the: (a) ovary (b) testis (c) oviduct (d) uterus

Q: consider a pig that has only fully formed ovary. how would this affect the pig's future…

A: Anything the gilt encounters before its first mating has the potential to influence its reproductive…

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: If an egg cell were treated with EDTA, a chemical that bindscalcium and magnesium ions,(A) the…

A: EDTA - Ethelene diamine tetra acetic acid is a chelating agent and is very effective chelator of…

Q: Where does fertilisation occur in human beings?

A: Fertilization is the process by which occurs when the male and the female gametes fuse together to…

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 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: If it takes just one sperm to fertilize an egg,why do males make so many?

A: During fertilization, the head of sperm binds to the zona pellucida layer of egg and induce acrosome…

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: Why do mammalian eggs have a small concentration of yolk, while bird and reptile eggs have a large…

A: Eggs are divided into three types on the basis of the amount of cytoplasm present in them. They are…

Q: What structural adaptation in chickens allows them to lay theireggs in arid environments rather than…

A: The vertebrate embryo requires an aqueous environment for their development. The amphibians and…

Q: Where does fertilization takes place in human female?

A: The human female reproductive system includes a pair of ovaries, oviducts, uterus, vagina, vulva,…

Q: The beginning of brain and spinal cord formation is termeda. cephalocaudal folding.b.…

A: Gastrulation process is characterized by formation of three primary germ layers, they are ectoderm,…

Q: Parthenogenesis isa. the process by which the germ layers form.b. involved in the formation of the…

A: Reproduction is the process by which living beings produce their own kind.

Q: The inner cell mass of a human blastocysta. gives rise to the chorion.b. gives rise to the…

A: Cell is the basic unit of life. Based on the number of cells an organism may be prokaryotic or…

Q: Investigate how the mass of the inert yolk affects reptiles, mammals and amphibians gastrulation

A: The development of multi-cell organic entities starts from a single celled zygote, which goes…

Q: What are some advantages of the pronounced cephalization that occurred as vertebrates evolved from…

A: Answer- Animals are adapted and evolved so that they can survive and reproduce well. In tetrapods…

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: 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: 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: Compare the structures of the egg and sperm. What structural modifications do sperm have that…

A: The process of producing new organisms from the pre-existing ones is called reproduction. It may be…

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

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

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: Which structure connects the embryo to the placenta?

A: Umbilical cord

Q: Why are sea urchins have external fertilization? What are the adaptive advantages of external…

A: Sea urchins are significant herbivores on coral reefs, & in certain environments they assume a…

Q: what characteristics are shared among bird embryos, pig embryos, and human embryos?

A: There are several similarities between the embryos of different species of animals and birds. It was…

Q: What is the differences between Mammals and Frogs in Spermatogenesis?

A: Gametogenesis is the process of manufacturing gametes or daughter cells in gamete-producing mother…

Q: Does the distribution of Ca²+ in an egg correlate with formation of the fertilization envelope?

A: During fertilization, sperm-induced rise in cytoplasmic Ca2+concentration.

Q: The archenteron develops into(A) the mesoderm.(B) the endoderm.(C) the placenta.(D) the lumen of the…

A: Gastrulation is the process of reorganization of the blastula, a hollow structure into a two or…

Q: differentiate the frog and mammalian spermatogenesis. Spermatogenesis Frog Mammal

A: Spermatogenesis is the development of haploid sperm cells from germ cells in the testis'…

Q: Why are the ectoderm and endoderm called the “germ” layer?

A: Gastrulation is the process of the embryonic development in which cell  movements establish the…

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: Where does the fertilization of a human egg normally take place?

A: Fertilization is the process of combining haploid gametes (egg and sperm) to produce a diploid…

Q: How many eggs do you think were released by the ovary of a female dogwhich gave birth to 6 puppies?

A: Reproductive system of female dog comprises of vulva, vagina, cervix, uterus (Y shaped), oviducts…

Q: Using sea star embryos as an example, describe gastrulation. Explain how the mass of inert yolk…

A: Gastrulation is the process in the embryonic development of many animals. In gastrulation, there is…

Q: In the 33 hr. chick embryo stage what structure/s would serve as a guide to approximately…

A: Auditory vesicles are distinct. Three pairs of arterial arches arise from the ventral aorta. Somites…

Q: The egg travels from the ovaries to the uterus via the ?????

A: Female reproductive system consists of organs and glands which are involved in reproduction  Female…

Q: What are the four extraembryonic membranes of amniotic eggs of birds and other reptiles and what is…

A: Step 1 Extraembryonic membranes are those membranes that surround the embryo of terrestrial…

Q: What is the fate of the four extraembryonic membranes in embryos of placental mammals?

A: Any of the tissues, derived from the fertilized egg, that encase or in any case add to the help of…

Q: What structures carry the egg from the ovaries to the uterus? Are these structures the same in all…

A: Introduction The ovary is a female reproductive organ that produces an egg called an ovum. This goes…

Q: In comparing external and internal fertilization, what evolutionary change can be seen in the coats…

A: In sexual reproduction, the process of fusion of two gametes to form a zygote is known as…

Q: What happens in the process of fertilization in animals and humans?

A: The cells of the biological unit of life. the cells comprise tissues which collectively forms an…

Q: What is ripened ovary known as?

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

Q: Hermaphroditic animals can self-fertilize, except earthworms. Why? And is this an advantageous or…

A: Earthworms are invertebrate animals belonging to the phylum Annelida. the animals have tube-like…

Q: What is the difference between the testes of shark and frog?

A: Testes are the male reproductive organ that is responsible for producing spermatozoa or male…

Q: From which of the following is the embryo developed? a) Trophoblasts b) Blastocoelen c) The…

A: In humans the period of pregnancy is about 39-40 weeks. This is called as gestational period. During…

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…