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    Posted 2 years ago in Form 2

    Transportation Of Materials In Living Things

    i want to know about blood vessels

      11       32

    Comments  

    MAMBA SECONDARY   Posted on 3 weeks ago

    stephano lyankuba               

     

    the blood vessel are narrow tube that used in transportation of blood in the part of the body either in human or other living organism like animal

    Ticha Kidevu   Posted on 2 months ago

    hi

    BERNARD ELIAS   Posted on 4 months ago

    WHAT IS DATA

    JUMA THOBIAS   Posted on 4 months ago

    WHAT IS TRANSPORT

    Posted 2 years ago in Form 2

    Balance Of Nature

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

      7       15

    Comments  

    Nelson Kitomary   Posted on 2 months ago

    TSUP GEOF

    Geofrey Mtepa   Posted on 2 months ago

    Hi

    Ticha Kidevu   Posted on 2 months ago

    hello

    Kuluthumu Hamza   Posted on 2 years ago

    passive transport

    Posted 2 years ago in Form 3

    Coordination

    •  

      2       8

    Comments  

    Dominic Victor   Posted on 7 months ago

    Fuck

    Victor Maro   Posted on 1 year ago

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

    Fadhila Naikoyo   Posted on 1 year ago

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

    Raphael Lasway   Posted on 2 years ago

    HI

    Posted 2 years ago in Form 2

    Balance Of Nature

    What the role of decompose in tropical level.

      2       11

    Comments  

    Careen Kaunga   Posted on 5 months ago

    Hi Ben am new can we be friend s

    Lolo Mima   Posted on 1 year ago

    salute to you adam strategy perfecto answer

    Rynne 04   Posted on 2 years ago

    specify if it is secondary or primary decomposer

    ADAM STRATEGY   Posted on 2 years 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 

    Posted 2 years ago in Form 4

    Growth

    What the difference between meiosis and meitosis process. Six pont

      2       6

    Comments  

    Ciara Jol   Posted on 2 years ago

    big up bro

    Mwasi Philip   Posted on 2 years ago

    duh iyo essay

    BENSON DA SANTOS   Posted on 2 years 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 2 years ago

    tumia google mqal

    Posted 2 years 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 year 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 2 years ago

    Keep it up Ben.

    Ciara Jol   Posted on 2 years ago

    rock that explaination

    Mwasi Philip   Posted on 2 years ago

    mwanang we balaaaaa sio poa

    Posted 2 years ago in Form 1

    Introduction To Biology

    hi ladies and gentlemen

      21       102

    Comments  

    Sebastian Mollel   Posted on 2 weeks ago

    Hello

    John Soleya   Posted on 3 weeks ago

    H

    Adolph Gasper   Posted on 2 months ago

    hi

     

    Ely Joseph   Posted on 2 months ago

    Hi group

    Posted 2 years 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 2 years ago in Form 3

    Movement

    what is antagonistic muscle action

      1       1

    Comments  

    Mariam Mziray   Posted on 2 years ago

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

    Posted 2 years ago in Form 4

    Genetics

    what are bases of DNA mention them

      1       3

    Comments  

    Mariam Mziray   Posted on 2 years ago

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

    Beatrice Laizer   Posted on 2 years ago

    Adenine,thymine,guanine, cytosine

    Fankie Peace   Posted on 2 years ago

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

    Posted 2 years ago in Form 3

    Coordination

    what is antagonistic muscle action

      0       0

    Comments  

    Posted 2 years ago in Form 3

    Classification Of Living Things

    What is gymnosperms

      2       1

    Comments  

    Fankie Peace   Posted on 2 years ago

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

    Posted 2 years ago in Form 2

    Classification Of Living Things

    Hey what is  niche 

      0       2

    Comments  

    Tatu Kabandika   Posted on 2 years ago

    Enx

    Young Coco Swam   Posted on 2 years ago

    A habbitat of living things

    Posted 2 years ago in Form 1

    Introduction To Biology

    how bios is related to agriculture and medicine

      2       5

    Comments  

    Sebastian Mollel   Posted on 2 weeks ago

    Biology by definition we can say that biology is the study of life and living organisms. Agriculture depends highly on biology for selection of suitable seeds and breeds of livestock.Also biology helps pharmacist to design medicine and knowing their effects on living organisms

    Naima Saad   Posted on 2 years ago

    What is entomology

    RAMZAN MOHAMED   Posted on 2 years ago

    true

    Zainab Salim   Posted on 2 years ago

    thank u

    Posted 2 years ago in Form 4

    Genetics

    hyposecretion of hyroxine result to disorder known as

      1       1

    Comments  

    Young Coco Swam   Posted on 2 years ago

    Mm truely i hav no idea

    Posted 2 years ago in Form 1

    Introduction To Biology

    goodnight guz

      0       6

    Comments  

    Naima Saad   Posted on 2 years ago

    It is not sleeping time

    Fardowsa Abass Yussuf   Posted on 2 years ago

    He

    llo

    Anicetha George   Posted on 2 years ago

    nite

    Young Coco Swam   Posted on 2 years ago

    Ok

    Posted 2 years ago in Form 4

    Genetics

    what is agglutination

      0       2

    Comments  

    Young Coco Swam   Posted on 2 years 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 2 years ago

    Is the clamping together of red blood cell

    Posted 2 years ago in Form 4

    Classification Of Living Things

    What is proglottids

      0       2

    Comments  

    Young Coco Swam   Posted on 2 years ago

    As fankie said

    Fankie Peace   Posted on 2 years ago

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

    Posted 2 years ago in Form 4

    Evolution

    What is natural selection

      1       3

    Comments  

    Louis Frank   Posted on 4 months ago

    this is were by organism are selected by nature

    Lolo Mima   Posted on 1 year 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 2 years ago

    No idea my

    Posted 2 years ago in Form 1

    Introduction To Biology

    What is lchthyology?

      0       8

    Comments  

    Kidsavage Sam   Posted on 2 years ago

    ICHTHYOLOGY

    Careen Edward   Posted on 2 years ago

    Of course,

    Naima Saad   Posted on 2 years ago

    Zoology is the study of animals

    Hope Stanley   Posted on 2 years ago

    SCIENTIFIC STUDY OF FISH

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