.If you removed the ZPA from a limb bud and then placed a bead soaked in Sonic hedgehog in the middle of the bud, what would be the most likely result?

Q: by looking at the picture above, describe the events that take place during fertilization of an…

A: Stages of development: Fertilization · Embryonic development - Cleavage  Fetal - Differentiation…

Q: 8. Name the two indicated structures below the arrow, seen here in the PinuS ovule.

A: Plants are majorly divided into 2 types they are vascular plants and on vascular plants. Non…

Q: Show a picture of a male, a female and a hermaphrodite papaya flowers. Label the male and the female…

A: Flowers are made up of several different parts, including sepals, petals, stamens, and carpels.…

Q: Using Venn diagram, discuss the similarities and differences of reproduction in plants and animals

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

Q: Define stem

A: To define: To define stem and its parts

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: Which of the following steps of sea urchin fertilization initiates the formation of the…

A: Fertilization is the union of male ( spermatozoa ) and female ( ovum ) gametes which results in the…

Q: Describe, in detail, fertilization.

A: The life process of the formation of a new organism from existing organisms is called reproduction.…

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

A: Fertilization, also referred to as syngamy, generative fertilization, and impregnation is the fusing…

Q: Outline the process of double fertilization, and explain the advantage it confers

A: Flowers are the site of sexual reproduction in flowering plants. Sexual reproduction in flower can…

Q: Discuss the importance of the acrosomal cap of the sperm cell. Give its importance during…

A: Introduction  Life starts from single cell called Zygote. Zygote is the single diploid cell resulted…

Q: Outline the enzymes that play important role in fertilization. Include their functions.

A: Fertilization is the event in sexual reproduction that marks the fusion of the male gamete which in…

Q: Compare and contrast the initiation of zygotic DNA replication in internal versus external…

A: INTRODUCTION Sexual reproduction starts with the combination of a sperm and an egg during a process…

Q: Write a short note on fertilization in Riccia ?

A: These plants are small and thalloid, meaning they lack root, stem, and leaf differentiation. The…

Q: What biological mechanisms account for the resemblance between offspring and their parents? Exmpain…

A: Introduction :  DNA stands for 'deoxyribonucleic acid' and it is the hereditary material in humans…

Q: Represent diagramatically different stages of fertilization.

A: Since the question do not specify any particular organism for the process of fertilization.…

Q: Describe the events that lead to slow and fast blocks to polyspermy and the differences between the…

A: Question - Describe the events that lead to slow and fast blocks to polyspermy and the differences…

Q: All of the following develop from the same germ layer, except__________."     circulatory system…

A: Except epidermis,all of the germ layers derived from the same germ layer.  Circulatory system,…

Q: Describe how Intermediate Filaments is involved in fertility (either directly or indirectly),…

A: There are three cytoskeleton elements present inside the eukaryotic cell i.e microtubules the…

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: What  similarities  do  the  illustrations  have?  What are the differences?  What trends do you see…

A: Comparing different embryonic stages of different animals is a tool that can be used to infer…

Q: 4. Look at the structures that the arrows point to below. What do these structures become once…

A: The structure shown in the above picture is termed as ovules.

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: Compare and contrast the mechanisms of polyspermy block in internal versus external fertilization.

A: When an egg is fertilized by more than one sperm it is called as polyspermy. Generally in diploid…

Q: tabular form, Cite differences between frog and chicken ovary.

A: Ovary, in zoology, female organ within which sex cells (eggs, or ova) are made. Female vertebrates'…

Q: Why are most babies born in the spring?

A: The Center for Disease Control and Prevention (cdc) presents birth rate by month data, noting July…

Q: Which of the following is an illustration of permissive interaction?   -When implanted in the newt…

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

Q: best explains the lack of white flowers in the offspring? The trait for purple flowers is dominant…

A: Dominant character is always in the form of homozygous or heterozygous where as recessive character…

Q: Explain step by step in your own words what are the events that follow fertilization

A: Introduction An organism reproduces an offspring that is biologically identical to the organism…

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A: Characteristics can be inherited or acquired. Inherited characteristics are the characteristics…

Q: Draw a comprehensive flowchart, showing derivatives of all germ layers by using your own idea to…

A: Germ layers are formed during embryonic development. They form various organs and body structures…

Q: A E F H. K Match the illustration to the name of the stage. %3B

A: Prophase is the second stage of the division cycle, which shows the condensation of genetic material…

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: 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: Explain how fertilization provides genetic diversity to the offspring

A: Fertilization is the union of two haploid gametes - the male gamete or the sperm and the female…

Q: What are the advantages and disadvantages of internal fertilization over external fertilization? How…

A: Internal fertilization - It is the fusion of egg and sperm during sexual reproduction inside the…

Q: What is the primary purpose of the fertilization membrane? a)Provide the growing embryo with food…

A: Sperm and egg (ova) are male and female gametes respectively. Fertilization is key process in sexual…

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: Research on in vitro fertilization, discuss or identify the importance of in vitro fertilization

A: Fertilization refers to the process of fusion of women's egg and men's sperm to form a zygote. It…

Q: Why do sea urchins have external fertilization?

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

Q: 15. A researcher is studying a ce- fertili: Identify the process shown in

A: A cell is a cytoplasmic mass that is outwardly attached by a cell membrane. Cells are the smallest…

Q: Draw diagrams that show how induction and morphogens can control early pattern formation and…

A: Morphogens are the substances that establish a graded distribution and elicit cellular responses in…

Q: Write short notes on hemimetabolous development

A: Metamorphosis is the developmental process occurring in insects. They include various changes in the…

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: Draw a well labelled diagram of human foetus attached to the umbilical cord.

A: The fetus is the unborn offspring of a mammal at the later stages of its development, from eight…

Q: Define the term CONTIG?

A: Millions and trillions of cells constitute the body of an organism. This is the case for a…

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…

Tissue renewal

In multicellular organisms, tissue is a level of structure that consists of a group of physically and functionally identical cells and their intercellular substances. Unicellular organisms do not have tissues. Tissues are absent or poorly differentiated even in the simplest multicellular animals, such as sponges. However, more evolved multicellular animals and plants have specialized tissues that may organize and govern an organism's reaction to its surroundings. The word tissue is derived from the Latin word 'weave.' Plants and animals have various kinds of tissue systems that differ in their work and composition according to the different requirements.