In sea urchin, which step of egg and sperm recognition involves the formation of a fertilization cone?   Sperm binding to the egg's vitelline membrane   Fusion of the sperm and egg membranes   Acrosomal reaction   Chemo-attraction   Sperm binding to the egg's jelly coat

Q: What cells are found in each tissue type? X. Y.

A: Chondrocytes  is term used for cartilage cell , they are building block of the cartilage…

Q: D А- -E B- C- OALL

A: Structural changes occurs in different stages of chick embryo.The 72 hour chick embryo shows the…

Q: is when an egg is released from the ovary. This typically occurs once a month in females.

A: Branch of biology that deals with the study of all those processes which take place during…

Q: Muscle cells differ from nerve cells mainly xpress different genes ontain different genes se…

A: The cell:- are the basic building blocks and functional units of all living beings on the earth.…

Q: The photo on the left shows an early frog embryo after three mitotic divisions of a fertilized egg.…

A: Introduction: Once the female frog has laid its egg, the male frog releases its sperm in the water…

Q: Some animals, like aphids, alternate between sexual and asexual reproduction. Describe environmental…

A: Evolution is a  process of gradual changes in the genetic composition of an organism based on the…

Q: Fertilization triggers the egg to complete meiosis II.     True   False

A: Fertilization triggers the egg to complete meiosis II.  The statement is TRUE.

Q: What are the molecular switches involve in sporulation? explain the switches involved not the…

A: Spores are cells that are produced by bacteria, fungi, or plants in response to adverse…

Q: Discuss how and why the queen honey bee aborts the worker bees' sexual maturation.

A: * Basically honey bee Colony have three types of honey bees namely  Queen bee Drones Worker bees…

Q: It asks to use the development images below to identify one of each of the following in the photos:…

A: Fertilization is the process of formation of Diploid zygote from the male and female gamete 's…

Q: The formation of the fertilization envelope in a sea urchin egg is most directly stimulated by an…

A: After fertilisation, a barrier known as the fertilisation envelope develops around the egg. The egg…

Q: Who is definitive and intermediate host? (Zoology subject)

A: The above diagram is on the life cycle of plasmodium. Here we have to find out what is the…

Q: a. CELL? = b. CELL? = c. CELLS? =

A: Sea urchin is spiny echinoderms, sea urchin have both sex male or female with testis and ovaries…

Q: Draw the amphibian and avian unfertilized eggs. Label membrane coverings and orientation of…

A: Unfertilized eggs are the eggs that have not been fertilized by sperm.

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: Toxoplasma gondi: Releases oocysts by gametogony in intestinal epithelium of dog. Oocyst is…

A: Toxoplasma gondii is an eukaryotic protozoan and is an obligate intracellular parasite which causes…

Q: Describe the evidence that the development of honeybee queens is due to exposure to royal jelly.

A: Ans: The honey bee is a type of eusocial flying insect and belongs to the genus Apis.

Q: Which diagram shows asexual reproduction occurring in a cell?

A: Reproduction is a biological process process in which an organism gives rise to young ones. It is…

Q: Blastocoel Visible nucleus O Archenteron Blastopore O Fertilization envelope

A: Formation of the fertilization membrane/fertilization envelop  The most important changes that…

Q: What is "ecdysis"? O The outermost covering of an ovum that undergoes external fertilization. O A…

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

Q: . How does the fertilization envelope form in sea urchins?What is its function?

A: Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete…

Q: Why is it immoral to culture headless embryos when in fact it can help to help people who need organ…

A: Murder of an individual is considered immoral. On similar terms, an embryo which is cultured to be…

Q: Use this diagram to answer the question: Gametes 1. zygote

A: Here, he picture depicts the process of fertilization. It is depicting chromosomes and refers to…

Q: In neurulation, what cell types are involved? What morphogens are present (and antagonists)? What…

A: Neurulation is the process that gives rise to the nervous system in embryonic development. This…

Q: Asexual reproduction Imago Hemimetabole Heterometabolic Caterpillar Discontinued Nymph 1 Continued…

A: G: PUPA B: Larva 1 F: Larva 5 D: Larva 3 (Can not see AT and VS in the image)

Q: One of the hypotheses is that a chimera formed from the fusion of two separately fertilized oocytes.…

A: Fertilization is a process that is the fusion of two gametes, one from the male and one from the…

Q: what will happen to the egg when it was soaked in warm water

A:

Q: The graph describes the change in egg membrane potential associated with fertilization in the sea…

A: Reproduction is the process of producing a new generation of organisms from the existing ones. It…

Q: Which mechanism prevents an ovum from being fertilized by multiple sperm cells? A. Once a sperm…

A: An egg should be prepared by only one sperm in particular. To forestall polyspermy, the zona…

Q: Which of the following is an illustration of permissive interaction? The epidermis signals the…

A: In life processes often one interaction is followed by a counter interaction. The most favorable…

Q: Give two ways nature uses to hide differences between X- and Y-sperm in mammals?

A: Most cells of the mammals contain both an X and a Y chromosome, but in the process of…

Q: Which of the following centers the chromosomes along the microtubules and orients the spindle during…

A: Introduction Chromosomes are long, linear structures composed of DNA and associated proteins,…

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.

Q: Select from the following adaptations for reproduction that occurred during protostome…

A: Introduction  Mollusks, annelids, and arthropods are all included in the diverse group of animals…

Q: Compare and contrast external versus internal fertilization. Describe at least three major…

A: External fertilization External fertilization is a mode of reproduction in which a male organism's…

Q: Cells migrate, transforming a blastula into a gastrula. Answer Bank The presence of a cell wall…

A: Plants and animals are two distinct kingdoms of living organisms. They have different…

Q: After the sperm cells enter a synergid, one fertilizes the egg in a two-step process. First there is…

A: Fertilization is a process which includes fusion of haploid male and female gametes (egg and sperm)…

Q: auer larva ? It's a larva from a special variant of C. elegans that was first identified in samples…

A: Dauer larva is a larval stage of C.elegans. This stage of larva is very much different from other…

Q: 8. The major event in the embryonic development of animals that results in a layered embryo is…

A: Fertilization is the process in which the male and the female gametes unite to form the zygote.…

Q: Give typing answer with explanation and conclusion  early accumulation of beta-catenin in the…

A: INTRODUCTION Spemann's organizer It is the cluster of cell present in the amphibians embryo. It…

Q: Explain the wingless and hedgehog feedback mechanism that is used to pattern the fly embryo.

A: ANSWER;-The wingless & hedgehog that is used to pattern the fly embryo. Wingless:- Its earliest…

Q: In the blanks below, identify the essential developmental process (NOT developmental stage)…

A: The every organism's embryo undergo the different developmental stages so that all the structures…