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    Posted 1 year ago in Form 2

    Transportation Of Materials In Living Things

    i want to know about blood vessels

      8       23

    Comments  

    Edson Meleji   Posted on 2 weeks ago

    i need to discuss about sexual reproduction

    Edson Meleji   Posted on 2 weeks ago

    am new

     

    Edson Meleji   Posted on 2 weeks ago

    hello friends am new so i nee your cooperation

     

    Lolo Mima   Posted on 2 months ago

    blood vessels are essential components of the blood circulatory system blood vessels help in the transportation of the blood and essential nutrients blood vessels are subdivided into three main components which are

                                        1. ARTERIES;these are vessels which transport blood from the heart to other                                    parts of the body except pulmonary arteries.                                                                                                                                                      2.VEINS:these are vessels which transport blood from other parts of the body to                    the heart, veins ensure that blood  flows towards the heart and prevents                     backflow of the blood due to they contain valves.                                            

     

          3.CAPILARIES:tend to have walls which diffuse out food substance and water                                 but they diffuse in  carbon dioxide and other waste products                                      from  the cell.           

    Posted 1 year ago in Form 2

    Balance Of Nature

    1. What is the name given to osmosis, active transport and diffusion 

      6       12

    Comments  

    Kuluthumu Hamza   Posted on 10 months ago

    passive transport

    Rynne Salema   Posted on 11 months ago

    forms of transportation

    Allen Krizant   Posted on 11 months ago

    Transportation forms

    Matthew Nicolous   Posted on 1 year ago

    Transportation of living things 

    Posted 1 year ago in Form 3

    Coordination

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      1       7

    Comments  

    Victor Maro   Posted on 2 weeks ago

    Coordination is ability of an organisms to detect changes from internal and external environment and respond to that changes

    Fadhila Naikoyo   Posted on 5 months ago

    c00dination is the working together of organs in an organism in a proper manner to respond to the stimulus

    Raphael Lasway   Posted on 1 year ago

    HI

    BENSON DA SANTOS   Posted on 1 year ago


    coordination


    1.
    the organization of the different elements of a complex body or activity so as to enable them to work together effectively.
    "an important managerial task is the control and coordination of activities"
    cooperative effort resulting in an effective relationship.
    "action groups work in coordination with local groups to end rainforest destruction"
    2.
    the ability to use different parts of the body together smoothly and efficiently.
    "changing from one foot position to another requires coordination and balance"

    Posted 1 year ago in Form 2

    Balance Of Nature

    What the role of decompose in tropical level.

      2       10

    Comments  

    Lolo Mima   Posted on 1 month ago

    salute to you adam strategy perfecto answer

    Rynne Salema   Posted on 11 months ago

    specify if it is secondary or primary decomposer

    ADAM STRATEGY   Posted on 1 year ago

    THE IMPORTANT OF DECOMPOSITION IS TO RETURN NUTRIENTS FROM THE DEAD ORGANIC BODY BACK TO THE SOIL FOR THE USE OF OTHER ORGANISMS LIKE THE PLANTS AND BACTERIA THIS HELPS TO MAINTAIN THE CIRCULATION OF NUTRIENTS TO THE FOOD CHAIN 

    BENSON DA SANTOS   Posted on 1 year ago

    The organisms that occupy the decomposer level of a biome are essential to life on Earth. They break down dead plant and animal matter so ...

    Posted 1 year ago in Form 4

    Growth

    What the difference between meiosis and meitosis process. Six pont

      2       6

    Comments  

    Ciara Jol   Posted on 10 months ago

    big up bro

    Mwasi Philip   Posted on 1 year ago

    duh iyo essay

    BENSON DA SANTOS   Posted on 1 year ago

    Meiosis is how eukaryotic cells (plants, animals, and fungi) reproduce sexually. It is a process of chromosomal reduction, which means that a diploid cell (this means a cell with two complete and identical chromosome sets) is reduced to form haploid cells (these are cells with only one chromosome set). The haploid cells produced by meiosis are germ cells, also known as gametes, sex cells or spores in plants and fungi. These are essential for sexual reproduction: two germ cells combine to form a diploid zygote, which grows to form another functional adult of the same species.

    The process of chromosomal reduction is important in the conservation of the chromosomal number of a species. If chromosome numbers were not reduced, and a diploid germ cell was produced by each parent, then the resulting offspring would have a tetraploid chromosome set: that is, it would have four identical sets of chromosomes. This number would keep increasing with each generation. This is why the chromosomal reduction is vital for the continuation of each species.

    Meiosis occurs in two distinct phases: meiosis I and meiosis II. There are many similarities and differences between these phases, with each phase producing different products and each phase being as crucial to the production of viable germ cells.
    What Happens Before Meiosis?

    Before meiosis, the chromosomes in the nucleus of the cell replicate to produce double the amount of chromosomal material. After chromosomal replication, chromosomes separate into sister chromatids. This is known as interphase, and can be further broken down into two phases in the meiotic cycle: Growth (G), and Synthesis (S). During the G phase proteins and enzymes necessary for growth are synthesized, while during the S phase chromosomal material is doubled.

    Meiosis is then split into two phases: meiosis I and meiosis II. In each of these phases, there is a prophase, a metaphase, and anaphase and a telophase. In meiosis I these are known as prophase I, metaphase I, anaphase I and telophase I, while in meiosis II they are known as prophase II, metaphase II, anaphase II and telophase II. Different products are formed by these phases, although the basic principles of each are the same. Also, meiosis I is preceded in interphase by both G phase and S phase, while meiosis II is only preceded by S phase: chromosomal replication is not necessary again.
    The Phases of Meiosis I

    After Interphase I meiosis I occurs after Interphase I, where proteins are grown in G phase and chromosomes are replicated in S phase. Following this, four phases occur. Meiosis I is known as reductive division, as the cells are reduced from being diploid cells to being haploid cells.
    1. Prophase I

    Prophase I is the longest phase of meiosis, with three main events occurring. The first is the condensation of chromatin into chromosomes that can be seen through the microscope; the second is the synapsis or physical contact between homologous chromosomes; and the crossing over of genetic material between these synapsed chromosomes. These events occur in five sub-phases:

    Leptonema – The first prophase event occurs: chromatin condenses to form visible chromosomes. Condensation and coiling of chromosomes occur.
    Zygonema – Chromosomes line up to form homologous pairs, in a process known as the homology search. These pairs are also known as bivalents. Synapsis happens when the homologous pairs join. The synaptonemal complex forms.
    Pachynema – The third main event of prophase I occurs: crossing over. Nonsister chromatids of homologous chromosome pairs exchange parts or segments. Chiasmata form where these exchanges have occurred. Each chromosome is now different to its parent chromosome but contains the same amount of genetic material.
    Diplonema – The synaptonemal complex dissolves and chromosome pairs begin to separate. The chromosomes uncoil slightly to allow DNA transcription.
    Diakinesis – Chromosome condensation is furthered. Homologous chromosomes separate further but are still joined by a chiasmata, which moves towards the ends of the chromatids in a process referred to as terminalization. The nuclear envelope and nucleoli disintegrate, and the meiotic spindle begins to form. Microtubules attach to the chromosomes at the kinetochore of each sister chro

    Fausta Fayiee   Posted on 1 year ago

    tumia google mqal

    Posted 1 year ago in Form 57123

    Genetics

    The first law of Heredity which is the law of segregation states that the characteristics of living organisms are determined by hereditary factors which occur in pairs and only one pair of such factors can be represented in a single gamete.Can some one tell me what the  second law of heredity states?

     

     

     

     

     

     

     

     

     

     

     

     

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    Comments  

    Lolo Mima   Posted on 1 month ago

    duuh we nomaa you are a genius keep it up, lazima uje kuwa doctor or else kuna mkono wa mtu

    Dickson Grishon   Posted on 9 months ago

    Keep it up Ben.

    Ciara Jol   Posted on 10 months ago

    rock that explaination

    Mwasi Philip   Posted on 1 year ago

    mwanang we balaaaaa sio poa

    Posted 1 year ago in Form 1

    Introduction To Biology

    hi ladies and gentlemen

      17       89

    Comments  

    Zainab Kubenea   Posted on 5 days ago

    Biology is the study of ling things or in simple way we can say is study of me and you

    Joseph Brouser   Posted on 1 month ago

    biology-this is the study of living organisims

     

    Joseph Brouser   Posted on 1 month ago

    hi am joseph the drummer

     

    Zakayo Paul   Posted on 3 months ago

    Biology is the study of living things 

    Posted 1 year ago in Form 1

    Safety In Our Environment

    Write an essay on bilharzias under the following guidelines-causes.-symptoms.-transmission.-prevention.

     

    -treatment.

     

     

     

      1       0

    Comments  

    Posted 1 year ago in Form 3

    Movement

    what is antagonistic muscle action

      1       1

    Comments  

    Mariam Mziray   Posted on 1 year ago

    antagonistic muscle action is the an ability of the tricep to contract and the bicep to relax

    Posted 1 year ago in Form 4

    Genetics

    what are bases of DNA mention them

      1       3

    Comments  

    Mariam Mziray   Posted on 1 year ago

    there are four bases of DNA and RNA are:Adenine(A),Guanine(G),Crytosine(C)Thymine(T)

    Beatrice Laizer   Posted on 1 year ago

    Adenine,thymine,guanine, cytosine

    Fankie Peace   Posted on 1 year ago

    Bases are the part of DNA that stores information and gives DNA the ability to encode phenotype, a person's visible traits.

    Posted 1 year ago in Form 3

    Coordination

    what is antagonistic muscle action

      0       0

    Comments  

    Posted 1 year ago in Form 3

    Classification Of Living Things

    What is gymnosperms

      2       1

    Comments  

    Fankie Peace   Posted on 1 year ago

    The gymnosperms, also known as Acrogymnospermae, are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes.

    Posted 1 year ago in Form 2

    Classification Of Living Things

    Hey what is  niche 

      0       2

    Comments  

    Tatu Kabandika   Posted on 1 year ago

    Enx

    Young Coco Swam   Posted on 1 year ago

    A habbitat of living things

    Posted 1 year ago in Form 1

    Introduction To Biology

    how bios is related to agriculture and medicine

      2       4

    Comments  

    Naima Saad   Posted on 1 year ago

    What is entomology

    RAMZAN MOHAMED   Posted on 1 year ago

    true

    Zainab Salim   Posted on 1 year ago

    thank u

    Young Coco Swam   Posted on 1 year ago

    Biology is the study of life in which lif complyses living things so in agriculture bios is related by medicine given for health of plants and animals...in medicine it relate with bios by making some medicine some knowledge from bios must b applied eg.this medicine can cure malaria or certain disease

    Posted 1 year ago in Form 4

    Genetics

    hyposecretion of hyroxine result to disorder known as

      1       1

    Comments  

    Young Coco Swam   Posted on 1 year ago

    Mm truely i hav no idea

    Posted 1 year ago in Form 1

    Introduction To Biology

    goodnight guz

      0       6

    Comments  

    Naima Saad   Posted on 1 year ago

    It is not sleeping time

    Fardowsa Abass Yussuf   Posted on 1 year ago

    He

    llo

    Anicetha George   Posted on 1 year ago

    nite

    Young Coco Swam   Posted on 1 year ago

    Ok

    Posted 1 year ago in Form 4

    Genetics

    what is agglutination

      0       2

    Comments  

    Young Coco Swam   Posted on 1 year ago

    This is the problem which occur when thers blood confusion eg. A person with Blood group A to be given blood group B this makes aggulation tus leads blood to clotte inside the body and can cause death

    Beatrice Laizer   Posted on 1 year ago

    Is the clamping together of red blood cell

    Posted 1 year ago in Form 4

    Classification Of Living Things

    What is proglottids

      0       2

    Comments  

    Young Coco Swam   Posted on 1 year ago

    As fankie said

    Fankie Peace   Posted on 1 year ago

    a segment of a tapeworm containing both male and female reproductive organs.

    Posted 1 year ago in Form 4

    Evolution

    What is natural selection

      1       2

    Comments  

    Lolo Mima   Posted on 1 month ago

    this is also known as survival for the fittest this when the natural mechanism tends to favour an indivual example of natural selection is when two people take the same medicine but one seems to be affected bz the medicine while the other seems to not be affect but the medicine thus the medicine has naturally selected....i think so aint sure

    Young Coco Swam   Posted on 1 year ago

    No idea my

    Posted 1 year ago in Form 1

    Introduction To Biology

    What is lchthyology?

      0       8

    Comments  

    Kidsavage Sam   Posted on 7 months ago

    ICHTHYOLOGY

    Careen Edward   Posted on 9 months ago

    Of course,

    Naima Saad   Posted on 1 year ago

    Zoology is the study of animals

    Hope Stanley   Posted on 1 year ago

    SCIENTIFIC STUDY OF FISH

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