What  similarities  do  the  illustrations  have?  What are the differences?  What trends do you see from stage 1 to stage 3?

Q: What are morphogens, exactly? Explain how they affect the patterning of tissue throughout embryonic…

A: Pattern formation is a development process by which the cells acquired different identities…

Q: What parts are persistent throughout the development of the embryo? Why are these present in all the…

A: Answer

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: 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: Why does the dispersion or contraction stage of the developmental cycle assume a complex character

A: Family development is a notional methodology for the orientation of the research and set an abstract…

Q: The cells that pull the archenteron through the blastocoel in the sea urchin are _____ cells called…

A: The early stage in the development of the embryo is referred to as gastrulation. Gastrulation is a…

Q: Animals and plants both have diploid and haploid cells. How does the animal life cycle differ from…

A: The alternation of generations is the alternation of a sexual phase and an asexual phase in the life…

Q: hat parts are persistent throughout the development of the sea urchin embryo? Why are these present…

A: A multicellular animal arises from a single cell a fertilized egg. During development ,the cell…

Q: How many functional eggs (ova) result from one oogonium?     A. 1 and 3 polar bodies   B. 18…

A: In sexually reproducing organisms haploid gametes are produced. Female gametes are called eggs…

Q: Where is the egg found in seed plants?

A: Seed plants are a group of plants. Gymnosperms and angiosperms form the group. Their seeds have…

Q: lame specific structure "A" Ovary lame specific structure "B" anther A-

A: The given figure it of a flower. Flower is considered to be a reproductive organ of the plant. If…

Q: Why are blastomeres in the pigmented part of the egg smaller and more numerous than in the…

A: The other terms associated with developmental biology include embryogenesis or embryology. This…

Q: Fill in the blank:  A human offspring is called a(an) ___________________ until the end of the…

A: The development of human offspring takes around nine months. The development involves four stages.…

Q: iv. Two nuclei cells in Stage W will be fertilized by two male gametes. State how the two male…

A: Blooming plants replicate physically through a cycle called fertilization. The blossoms contain male…

Q: 26. What stage is this? 27. What stage is this? 28. What stage is this? A C E F 29. What stage is…

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

Q: Draw and label the parts of frog neurulation stages as seen in x.s. and w.m. preparations.

A: Neurulation in frog is a folding process in which the vertebrate embryos which essentially manages…

Q: What is the evolutionary significance of parthenogenesis in the class insects?

A: Parthenogenesis is a type of asexual reproduction in which the offspring develops from unfertilized…

Q: At this stage of embryogenesis, the plant embryo forms eight cells. In Arabidopsis thaliana, it is…

A: Embryogenesis of a single cell gives rise to a living multicellular organism. The embryo formed from…

Q: In frog neurulation the notochord _______ the formation of the _______ in the ectoderm next to it.…

A: ANSWER) (a) expresses, neural plate

Q: Consider the similarities and differences in the reproductive cycles (haplontic, diplontic, and…

A: All these life cycles are based on the haploid and diploid phases. This is called alternation of…

Q: What is the difference between direct and indirect development?

A: Development refer to the process of the formation of the adults from the progeny stage. There are…

Q: In embryos with spiral cleavage the 4d cell gives rise to which germ…

A: INTRODUCTION Mesoderm It is a germ layer formed during gastrulation. Present between ectoderm and…

Q: In mammals, primordial germ cells migration ends when they reach the _________________   posterior…

A: Primordial germ cells (PGCs) are highly specialized cells that act as precursors of gametes, which…

Q: why do the embryos of different species resemble each other?

A: The embryo is an early stage of development in multicellular organism (from fertilization to start…

Q: How much genetic information is found within gametes (eggs and sperm)? A. Each gamete contains one…

A: There are two types of gametes male and female.Male gametes are called as sperms which are formed…

Q: What is one of the ethical issues related to using embryonic stem cells? O A. Embryonic cells are…

A: Embryonic stem cells (ESCs) are collected from early-stage embryos i.e a group of cells that produce…

Q: Which choice below shows a correct order of events during development? Gastrula, blastula, neural…

A: Embryonal development consists of many stages and involves  Cellular division  Cellular…

Q: Give one possible function of the observed phenomenor

A: In the diagram, the organism is a sea-cucumber.

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: The embryo found in the mosses, ferns, pines, and flowering plants is; Haploid Diploid Neither

A: Embryo  It is early stage of development of a multicellular organisms.

Q: For each embryonic tissue type, write one organ or differentiated cell type that is derived from…

A: Introduction:- The endoderm (inner layer), ectoderm (outer layer), and mesoderm (middle layer) are…

Q: Is parental care of a species a factor that affects embryological development? If so, how?

A: Embryological Development -- Embryological Development also called as Embryogenesis a complicated…

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: The grandfather has hairy-eared son. His son married a girl who gave birth to a boy. What are the…

A: Introduction: The pedigree refers t the family tree, which is drawn with genetic standard symbols.…

Q: How many are in each stage?

A: Hi! Thank you for the question. It seems some of the cells aren't properly visible. So, I am…

Q: Question #1 What is importance of pharyngeal pouches in development? Question #2 What duct empty…

A: Bile is a type of fluid that is made and released by the liver. Bile is stored in the gallbladder.

Q: Give an analogy on how the concepts of determination and differentiation are seen in personal events…

A: During the early embryonic development  , the cells are said to be totipotent because of their…

Q: mammals, primordial germ cells migration ends when they reach the _________________   posterior…

A: Premordial germ cells are only means of genetic transmission between parent and offspring.…

Q: IDENTIFICATION (Developmental Biology) Question #1. Refers to the arrangement of the mitochondria,…

A: Developmental biology deals with the study of development of multicellular organisms from single…

Q: By looking at the picture above, describe the events that take place during fertilization up to the…

A: Fertilisation is q process of fusion of male and female games resulting in the formation of a…

Q: What evolutionary changes occur to the egg covering between external and internal fertilization?…

A: Life first evolved with external fertilisation and later on internal fertilisation. Since, external…

Q: Embryos with cleavage pattern depicted in panel B exhibit mosaic development. B A) True B) False

A: Embryo  In developmental biology, the early stage of multicellular organism that is form by…

Q: What process is occuring indicated by the letter A Name the strcuture indicated by the letter B Name…

A: The given diagram shows the life cycle of the angiosperms. Angiosperms are the flowering plants in…

Q: Label the parts of the ovule in the free-nuclear- and mature stage. Indicate the ploidy of the…

A: Labeling of the parts of the ovule in the free-nuclear- and mature stage is done below:

Q: What is embryological studies?* O the study of the development of an embyo O the study of plant and…

A: Fertilization is a process of fusion between the male gametes (sperm) and the female gametes (egg).…

Q: It appeared, then, that something in the region of the gray crescent was essential for proper…

A: The amphibian eggs, when divided into two blastomeres along the plane of first division, the cells…

Q: Embryo Gene 1: R Red (or purple) aleurone, dominant Colorless aleurone, recessive Gene 2: Colorless,…

A: 1. For answer 1 determine all the genotype in F2 generation in this figure.  2. Predict the color…