Why is the nucleus no longer observable in the zygote?

Q: Explain block to polyspermy?

A: Polyspermy: - It is the process, where egg has been fertilized by so many sperms. In this condition…

Q: How are gametes and zygotes related?

A: Gamete refers to a haploid sex cell that is sperm in males and egg (oocyte) in females. A zygote is…

Q: What do you mean by acrosome?

A: In most animals, the sperm is the male gamete that fuses with the female gamete and forms the…

Q: Why do most zygotes develop after certain amount of embryo is formed?

A: The embryo is the early stage of the development of multicellular living beings. A fertilized egg…

Q: What is external cephalic version?

A: External cephalic is a type of external rotation of fetus in utero.The physician rotates the fetus…

Q: What are limb buds?

A: Vertebrates have three basic germ lines in the developing embryo. The outermost ectoderm, the middle…

Q: How similar is the genetic information within each blastomere?

A: Blastomere: Its is a stage in early embryonic development. It is 2 celled structure formed by first…

Q: What type of gamete is produced by an antheridial head? By an archegonial head?  Are these produced…

A: The anthredial head and archegonial head are present in the bryophytes. The bryophytes are also…

Q: Is an zygote a life?

A: Cell division is a process of a parent cell replicating it chromosomal content and dividing itself…

Q: What term is associated with sexual reproduction?

A: Sexual reproduction It is defined as the process in which new organisms are formed through combining…

Q: How is a zygote formed?

A: Sexual reproduction: It is a type of reproduction that involves the fusion of gametes. It required…

Q: What is the thick connective tissue layer that surrounds the parenchyma of the ovary called?

A: Ovary is the female reproductive organ.It has distinctively two regions: cortex which contains…

Q: What is a morula, and how is it formed?

A: Embryonic development or embryogenesis is the development of embryo from fertilized egg and its…

Q: Name the third tier of embryonal cells in pinus formed.

A: All plants come under the kingdom Plantae. They are eukaryotes, multicellular, and having cell…

Q: What is the Septum description of discorbis?

A: Discorbis is species in the Protista kingdom . They are seen every where and are seen in shells.…

Q: Indicating the name and respective ploidy of each involved cell how can theformation of egg cells…

A: the formation of egg cells from the germ cells occurs in the ovaries this process is known as…

Q: what are Acrocentric Chromosomes?

A: Chromosomes are rod-shaped condensed chromatin fibers that act as hereditary vehicles as they store…

Q: How big is a zygote?

A: A zygote is a cell that forms as a result of fertilization or fusion of male and female gametes. The…

Q: Match the answer to the questions about each indicated structure. A E B D F

A: a) Structure A and B are Diploids (2n)  b) Letter F represents Female gametophyte c) Letter G…

Q: How is ovary attached to back wall?

A: Ovaries are the female gonads and the primary female reproductive organs. They secrete hormones,…

Q: Name the two indicated structures below the arrow, seen here in the Pinus ovule.

A: Pinus is a tree that belongs to a group of plants known as gymnosperms. This plant is mainly…

Q: Draw the diagram of male thallus and female thallus and differntiate them?

A: The thallus is the vegetative a part of the body which will not differentiate into roots, stem, and…

Q: What do you mean by trophoblast?

A: Trophoblast is layer of a particular type of cells. A cell is the basic structural and functional…

Q: What is acrocentric chromosome?

A: Chromosomes are rod-shaped condensed chromatin fibers that act as hereditary vehicles as they store…

Q: Identify the encircled part. What is the function of this?

A: INTRODUCTION Bronchioles : The bronchi branched into small tiny tubules called bronchioles which…

Q: How many chromosomes will be there in the zygote?

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: Is anther are bilobed if yes then why?

A: Plants are non-motile living beings that shows the capacity of producing their own food utilizing…

Q: What is blastomeres?

A: Embryonic development is also called as embryogenesis. It is a process by which the embryo forms and…

Q: following is an example of epistasis?

A: Epistatis: It is defined as the the action of masking one gene upon expression of another gene. Even…

Q: Which type of symmetry is associated with cephalization?Why is it important? What is usually…

A: Symmetry, in biology, the repetition of the parts in an animal  in an orderly fashion. Symmetry…

Q: What is Homoplasmy

A: The branch of biology that includes the study of genetic variations, genes, and inheritance in the…

Q: What is dominant epistasis?

A: Gene is a functional unit of heredity. A gene is a sequence of nucleotides in genome that codes for…

Q: What are zygotes and other cells carrying two matching sets of chromosomes?

A: Gametes are basically the reproductive cells of an entity or organism.  Sperm cell and egg cells…

Q: What are the differences between astral and anastral mitosis?

A: As we know all living organisms are made of  basic unit of structure and function called as cell.…

Q: What is the difference between radial and spiral cleavage?

A: Cleavage is defined as the process in which division form the cells and eventually the new organism.…

Q: Which germ layer does structure #5 arise from?

A: The given image depicts a chicken embryo after about 33 hours of fertilization. At this stage, the…

Q: Describe a zygote?

A: The fusion of male and the female cells is known reproduction.

Q: What is the difference between a follicular cyst and a corpus luteum cyst?

A: Asymptomatic women frequently have ovarian cysts, also known as ovarian masses or adnexal masses,…

Q: How many acrocentric chromosomes do we have?

A: Chromosomes are long thread like structures present in all the cells of the body. They carry coded…

Q: Define term Homosapiens

A: Charles Darwin stated that the evolution of man would take not thousands of years but millions of…

Q: Where do cleavage furrow form??

A: Mitosis is the phase in cell cycle where the division of replicated chromosomes into two new nuclei…

Q: What other developmental hallmarks are often associated with spiral or radial cleavage?

A: Based on the directions and angles the cleavage furrow cuts, cleavage is of four types, namely,…

Q: How do taenias classifyaccording to the division ofsexes?

A: Taenia is a genus of tapeworm belonging to Phylum Platyhelminthes. This phylum is characterised by…

Q: How strobili are differentiate between male and female?

A: A strobilus is a reproductive structure characterized by overlapping scale-like parts, as a pine…

Q: What is the function of structures Y and Z?

A: Introduction The reproductive component of a plant is called a flower. The bloom is divided into two…

Sleep Physiology

Sleep is a condition of reduced muscle movement in the body. Awareness about the surroundings is reduced at the time of sleep. The body stays mildly responsive or non-responsive to external stimuli. The sleep-wake cycle is controlled by the circadian rhythm that produces a resting phase for the body.