A sea urchin egg is treated with an inhibitor that prevents the rise in intracellular Ca2+ right before fertilization. Which of the follov events would be blocked by addition of this inhibitor? Choose one or more: O A. entry of multiple sperm into the cell O B. fertilization envelope rising from the cell surface O C. formation of vesicles under the plasma membrane O D. exocytosis of hydrolytic enzymes

Q: Where does crossing over takes place?  A. Pachytene stage B. Diakinesis stage C. Anaphase stage…

A: Crossing over is the process that produces a new combination of genes by interchanging the segments…

Q: In humans, gametogenesis results in the formation ofa. diploid egg and sperm cells.b.…

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

Q: In a newly fertilized egg, the vitelline layer O secretes hormones that enhance steroidogenesis by…

A: In Sea urchin, a capacitated sperm first crosses zona pellucida layer then it passes through…

Q: Which of the following plays the greatest role in determining how cytoplasmic division occurs during…

A: Cytoplasmic division or Cytokinesis plays the role in separation of the the original cell, its…

Q: At which age range does a human female starts the active regular cycles of meiosis? O a. 1-6 years O…

A: In females, meiosis begins at the fetal stage where the diploid cells enter meiosis I.

Q: Double fertilization in flowering plants occurs when one sperm cell fuses with an egg to form a…

A: Flowering plants are also called angiosperms and produce seeds inside the fruits.

Q: During oogenesis, oogenetic inhibitors must be deactivated after full growth to allow the

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: In the course of double fertilization, one sperm cell fuses with the egg and the second one fuses…

A: Double fertilization gives stimulus to the plant due to which the ovary develops into fruit and…

Q: Fill in the blank: The cell resulting from fertilization divides by the process of…

A: The division of a cell into two or more cells is called cell division. The mitosis and meiosis are…

Q: Double fertilization means that(A) flowers must be pollinated twice to yield fruits and seeds.(B)…

A: In plants and in animals, sexual reproduction is the process of making new individuals. In sexual…

Q: 1. There are many pathways in fertilization that remain as gray areas. Choose one of these pathways…

A: Reproduction is a basic feature of life, which is a process by which the offspring of an organism is…

Q: A chemical that prevents acrosomal proteins from interacting with proteins on the egg membrane would…

A: The binding of the sperm to the vitelline envelope of the egg is species-specific.

Q: Central self-tolerance in the immune system arises when maturing T cells in the thymus undergo…

A: Apoptosis is a process of natural cell death. T cells are matured in Thymus but are born in Bone…

Q: A couple undergoes a workup for infertility, which shows that the man has a low sperm count. The…

A: Reproduction is the process by which an organism creates more of its own progeny. Reproduction is…

Q: In unicellular organisms, mitosis helps in asexual reproduction as it produces an identical copy of…

A: Note:- here I will provide you the answers of first two related questions according to the…

Q: The Following are parts of sperm cell, what their importance in fertilization? A. Acrosomal Vesicle…

A: The Following are parts of sperm cell, what their importance in fertilization? A. Acrosomal Vesicle…

Q: SOME EVENTS IN THE PROCESS OF FERTILIZATION 1. A single sperm nucleus and an egg nucleus fuse to…

A: Fertilization is the process of combining two haploid cells, the egg and the sperm, to produce a…

Q: Mammalian sperm don’t live very long after ejaculation.Therefore, for a rhino cow to become…

A: Induced ovulation in animals is done to increase the offspring count to combat the scarcity of…

Q: Researchers investigated the step-by-step processes of cell differentiation in somites through…

A: Cellular differentiation is a process during development in vertebrates, during which an…

Q: 4. During fertilization, what process allows steps 1-4 to occur, as shown here? Tail- Outer layers…

A: Fertilization is the process by which the male and female gametes fuse to form the zygote, which…

Q: (a)In mammals , an egg fertilized by one sperm divides repeatedly (1-2-4-8-16-32-64,etc). at the 64…

A: Since you have asked multiple questions , we will solve the first question for you. If you want any…

Q: Estrogen is a female hormone that helps develop and maintain the reproductive system. Estrogel…

A: Estrogen and Its Effects Estrogens are steroids that are important in the reproductive cycles of…

Q: Somites a. begin forming at the tail end of the embryo and then move forward in a wavelike…

A: Introduction: Somites can be defined as the longitudinal series among other series of blocklike…

Q: A sperm encounters an egg's jelly coat thus triggering the acrosomal reaction. What is the first…

A: Egg cells are the largest of all the cells in our body and are about 100 microns in diameter. It is…

Q: Egg laying in fruit flies can be triggered (induced) when males transfer their sperm to females.…

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

Q: In general, mammalian sperm are viable even if they are aneuploid, but pollen grains (a.k.a. “plant…

A: Sperm is the microscopic, elongated haploid motile male gamete or also called as paternal gemate.…

Q: Pathway (in order) of the following in the frog: a. urine b. egg cells c. sperm cells

A: Introduction :- In sexual reproduction, sperm is the male reproductive cell, or gamete (forms in…

Q: If you add a chemical to an egg cell that prevents the fast and slow blocks from occurring but does…

A: The fast block to polyspermy can be accomplished by altering the electric potential of the egg…

Q: In animals, meiosis of germ cells produces gametes. Some plant cells also undergo meiosis, but the…

A: Plants reproduce sexually, they use meiosis to produce haploid cells that have half of the genetic…

Q: nderstood, scientists do know that high levels of the hormone estrogen lead to the formation of r…

A: Oxytocin is a peptide hormone that is produced by the hypothalamus and stored in the posterior…

Q: Right after the fertilization process, the zygote polarizes first its membrane and then its…

A: introduction The zygote is polarized by an asymmetric stimulus from the environment, such as…

Q: Select ALL of the following that occur during spermiogenesis: Microtubules form a flagellum The…

A: Spermatogenesis is the process through which primary male sperm cells undergo meiosis and generate…

Q: Which of the following is not true regarding asexual reproduction? Select one: O a. The produced…

A: First we will see the meaning of asexual reproduction. The asexual reproduction involves the…

Q: What would happen if stem cells divided like spermatogonia? O There is a huge stock of stem cells in…

A: Spermatogenesis is the formation of the sperm from 2n cells to n cells. According to me the option…

Q: an egg cell were treated with EDTA, a chemical that binds to calcium ions: The acrosomal reaction…

A: Physiologically, the acrosomal reaction requires presence of calcium ions for the reaction to…

Q: Sexual differentiation begins close to 4 weeks after fertilization, but cannot be seen visually…

A: The formation of the reproductive organs begins shortly after egg fertilisation, with the primordial…

Q: Draw a labelled diagram of a section through ovary.

A: The female reproductive system includes the ovaries, fallopian tubes, uterus, vagina, vulva, mammary…

Q: A small amount of cytoplasm will leak out of a fertilized Drosophila egg if it is punctured at the…

A: In wild type, Anterior end consists of bicoid protein in high concentration and in posterior end…

Q: The developmental pattern of C. elegans is said to be mosaic because (a) development is controlled…

A: Introduction:- The nematode worm Caenorhabditis elegans is perfect for understanding the genetic…

Q: Meiosis is called reduction division. Explain why and where the reduction occurs and how this…

A: According to bartleby's guideline, I can provide only one question's answer. Kindly post the…

Q: the ectoderm of a gastrula stage vertebrate embryo, what is the major function of BMP4? a). repress…

A: Hello. Since your question has multiple parts, we will solve first question for you. If you want…

Q: You are studying reproduction in starfish (also known as sea stars).  You are able to successfully…

A: Sexual reproduction is the process in which the male and female gametes fuse together to form a…

Q: make a Venn diagram, to discuss the similarities and differences of reproduction in plants and…

A: Plants are eukaryotic multicellular organisms. Plant cells consist of the cell walls for the support…

Q: A classical experiment studying the fate determination of stem cells in the developing embryo uses…

A: Introduction Muscles are a type of soft tissue. muscles are made up of a lot of flexible fibres.

Q: The embryos of complex multicellular animals must establish spatial coordinates if development is to…

A: To find   The reference coordinate for developing frogs for the development to proceed

Q: 1. How many spermatids are formed from 10 spermatogonium B?  a. 20 b. 40 c. 80 d. 160 2. Oogenic…

A: Spermatids These are haploid cells that are produced through the second division of a spermatocyte.…

Q: Explain the consequent of each of the following on neurulation: a. Inhibition of microtubules…

A: Neurulation is one of the major development stages of embryonic development of animals. Neurulation…

Q: An oocyte is an immature reproductive cell found in many sexually reproducing organisms. A crawfish…

A: A female gametocyte or germ cell engaged in fertilization is called an oocyte. It is an embryonic…

Q: (a) Distinguish between asexual and sexual reproduction. Why isvegetativereproduction also…

A: Organisms are capable of creating a new organism and pass on their genetic information by performing…

Q: Mitosis occurs in which of the following situations? (select ALL that apply) A. Yeast cells…

A: Meiosis is a reductional cell division (a special cell division) that occurs in sex organ (testis…