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The primary components of theneuronare the soma (cell body), the axon (a long slender projection that conducts electrical impulses away from the cell body), dendrites (tree-likestructuresthat receive messages from otherneurons), and synapses (specialized junctions betweenneurons).

Microtubules associated with the cilia and centriole are present in all young neurons and many mature neurons and glia. Neuronal cilia and centrioles can be seen very easily by light microscopy in sections impregnated with silver by the Nauta method (H. A. Dahl, 1963). Centrioles can also be shown by light microscopy in neurons stained by other histological methods. (emphasis mine). They are by and large amitotic unless a trauma activates their potency to undergo limited cell division. Hence it may appear that the neurons do not have centrioles in contrast to normally dividing somatic cells.

Neuronsare permanent cells by nature so they don't divide and doesnothavecentrioles.

1.. male gametophyte

Nucleusis the central organelle of thecellwhich encloses theDNA. Apart from thenucleus, there are few other organelles which have their ownDNA.Mitochondria, power house of thecellhas its ownDNA. *Chloroplastsof the plant cells possess their ownDNA.

i think question is not complete. Plz clear the speed of car... Is it km/h OR km/s OR km/m

The oxygen during photosynthesis comes from splitwatermolecules. During photosynthesis, the plant absorbswaterand carbon dioxide.

Theoxygen released during photosynthesis comes fromthe splitting of waterduringthe light-dependent reaction

yes option (c)

Theoxygen released during photosynthesis comes fromthe splitting of waterduringthe light-dependent reaction c..

Theoxygen released during photosynthesis comesfrom thesplitting of waterduringthe light-dependent reaction

Diseases are of two types:

1. Infectious (infectious are contagious and are caused by pathogens).

2. Non-Infectious (Non-contagious and the cause is internal and non-pathogenic).

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A neuron look like a star. It has a cell body with nucleus and cytoplasm. Each neuron has a single long part called axon and many short, branched parts called dendrites

a neurone is a star like structure on urine consists of a cell body with the nucleus and cytoplasm from which long thin hair like part arises usually each neurone has a single long path called the axon and many short branch parts called dendrites

Plant and animal cellsboth undergomitotic cell divisions. Their maindifferenceis how they form the daughtercellsduring cytokinesis. During that stage,animal cellsform furrow or cleavage that gives way to formation of daughtercells. Due to the existence of the rigidcellwall,plant cellsdon't form furrows

option (a) is correct.

Genus is the correct answer

how

Main Function of cell division:Cell growth and repair.

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Spermatogenesis takes place in human seminiferous tubules

1) This produces 100 million sperms per day

2) The seminiferous tubules of the tests are the starting point for the process.

3) Spermatogenesis increases its size to form a diploid primary spermatocyte.

The cellstakein glucose and produce ethanol (alcohol) and carbon dioxide. Mostaerobic respirationhappens in the mitochondria, butanaerobic respirationtakesplacein the fluid portion of the cytoplasm.

it take place in cytoplasm

Chloroplasts are the sites of photosynthesis in plants

All green parts of a plant, including green stems and unripened fruit, have chloroplasts, but the leaves are the major sites of photosynthesis in most plants . There are about half a million chloroplasts per square millimeter of leaf surface. The color of the leaf is fromchlorophyll, the green pigment located within the chloroplasts. It is the light energy absorbed by chlorophyll that drives the synthesis of food molecules in the chloroplast. Chloroplasts are found mainly in the cells of

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The answer is scape.

Inbotany, ascapeis a longinternodeforming the basal part or the whole of apeduncle. Typically it takes the form of a long, leafless flowering stem rising directly from abulb,rhizome, or similar subterranean or underwater structure.

250 meiotic divisions to produce 1000 male gametes

but answer is 125.🤔

◇The human male and female reproductive cycles are controlled by the interaction of hormones from the hypothalamus and anterior pituitary with hormones from reproductive tissues and organs. In both sexes, the hypothalamus monitors and causes the release of hormones from the pituitary gland. When the reproductive hormone is required, the hypothalamus sends agonadotropin-releasing hormone (GnRH)to the anterior pituitary. This causes the release offollicle stimulating hormone (FSH)andluteinizing hormone (LH)from the anterior pituitary into the blood. Note that the body must reach puberty in order for the adrenals to release the hormones that must be present for GnRH to be produced.

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The female reproductive system provides several functions. Theovariesproduce the female egg cells, called the ova or oocytes. The oocytes are then transported to thefallopian tubewhere fertilization by a sperm may occur.

I) The uterus prepares itself every month in the hope of recieving a fertilised egg.

The blood lining thickens which is richly supplied with blood vessels necessary for the nourishment of the embryo.

2.(iii) Uterus Zygote develops into foetus that gets the nutrition and protection from the walls of uterus.Placenta is a disc embedded in uterine wall where foetal blood comes very close to maternal blood and exchange of materials like oxygen and waster materials takes place. It slowly develops into a new born baby after nine months in mother's body.

I) The uterus prepares itself every month in the hope of recieving a fertilised egg.

The blood lining thickens which is richly supplied with blood vessels necessary for the nourishment of the embryo.

2.(iii) Uterus Zygote develops into foetus that gets the nutrition and protection from the walls of uterus.Placenta is a disc embedded in uterine wall where foetal blood comes very close to maternal blood and exchange of materials like oxygen and waster materials takes place. It slowly develops into a new born baby after nine months in mother's body.

Asexual reproduction takes place through buddingin yeast.

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So so these are as following crabs blue whales octopussealsfishsharksseahorsewalrussquadjelly fish

(NEXT-GENeration) A common label applied to a major upgrade of a hardware or software product.

option A is the answer

The cycle begins with the reaction between acetyl-CoA and the four-carbon oxaloacetate to form six-carbon citric acid. Through the next steps of the cycle, two of the six carbons of the citric acid leave as carbon dioxide to ultimately yield the four carbon product, oxaloacetate, which is used again in the first step of the next cycle. During the eight reactions that take place, for every molecule of acetyl-CoA the cycle produces three NADH and one flavin adenine dinucleotide (FAD/FADH2), along with one molecule of ATP.

Figure: The Citric Acid Cycle (Krebs Cycle).

http://m.sparknotes.com/biology/cellrespiration/citricacidcycle/section2/

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Vegetative propagationmethod is used for growing certain plants which do not produce viable seeds. It is also used for growing of plants bearing superior traits, because they produce genetically identical plants. ... Plant which require lot of care during early stages of development are also grown by this method.

bear fruit earlier than normal plants

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Ans :- An advanced organism or higher organism has a complex body structureand organization. For example, anAmoebais more primitive as compared to astarfish.Amoeba has a simple bodystructureand primitive features as compared to a starfish. Hence, anAmoebais considered more primitive than a starfish.

it may be the orangutan.

Democracyis a system of government in which the citizens exercise power directly or elect representatives from among themselves to form a governing body, such as a parliament. ... Representatives stand in an election and the citizens vote for their representative.

1.Theatmosphereisessential for lifebecause it maintains an appropriate climate for the sustenance oflifeby carrying out the following activities: (i)Atmospherekeeps the average temperature of the Earth fairly constant during day time. (ii) It prevents a sudden increase in temperature during day time.

2.In this regard,waterisessentialsimply because it's a liquid at Earth-like temperatures. Because it flows,waterprovides an efficient way to transfer substances from a cell to the cell's environment.

diabetes.diabetesjournals.org

Although secreted by the pancreas,glucagondirectly impacts the liver as it works tocontrolblood sugar levels. ... In each of these processes,glucagonand insulin work together. Insulin will prevent glucose levels from increasing to a point that is too high, whileglucagonprevents it from dropping too low.

Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to blood sugarlevels, but in opposite fashion! Insulin is normally secreted by the beta cells (a type of islet cell) of the pancreas

Insect pests are one of the main causes for losses in agriculture production, and current control technologies based on pesticide application or the use of transgenic crops expressing Bacillus thuringiensis toxin proteins are facing efficacy challenges. Novel approaches to control pests are urgently necessary. RNA interference (RNAi) is a gene silencing mechanism triggered by providing double-stranded RNA (dsRNA), that when ingested into insects can lead to death or affect the viability of the target pest.

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After making asthak and fourwe will getR bar Q+ Sthanks

Active immunity involves your bodies direct response to an unknown pathogen. This response is the production of antibodies specific to the antigen of a particular pathogen. This type of immunity is not immediate as it takes time to have create enough of the correct antibodies to fight the pathogen. However, the response lasts for a long period of time and in some cases, where antibodies remain in the body as memory cells, immunity to the specific pathogen may be life long. Conversely, passive immunity is an immune response which involves antibodies obtained from outside the body.