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Another phrase for variation is genetic diversity which is produce through sexual reproduction.

incisors is the teeth that help in cut and bite the food

incisors helps in cutting of food

a..Synapsis is the pairing of two homologous chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them. ... When homologous chromosomes synapse, their ends are first attached to the nuclear envelope.

b..A bivalent, sometimes referred to as a tetrad, is the association of a pair of homologous chromosomes physically held together by at least one DNA crossover. This physical attachment allows for alignment and segregation of the homologous chromosomes in the first meiotic division

c..a point at which paired chromosomes remain in contact during the first metaphase of meiosis, and at which crossing over and exchange of genetic material occur between the strands.

The breathing cycleinvolves inhalation and exhalation of air due to alternate expansion and contraction of thoracic cavity. Thus it is arhythmic process. Butexchange of gases is a continuous processas it takes place between the blood and each and every cell, by diffusion.

lichen is a symbiotic plant, stomatal opening is surrounded by stomata

Divide by fission is wrong

but mitochondria divide by fission

Sorry second option is the correct answer

Sure

answer is C. plastid are site for carbohydrate biosynthesis

And what about mitochondria???

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The directional movement of plant part in response to source of light i.e. sun is called phototropic movement .the growth is towards the light stimulus.for example :- movement of stem in response to sunlight .

A symbiotic relationship benefits both parties. The two of you have a symbiotic relationship: she fixes your car and you style her hair.

In biology, symbiotic refers to any diverse organisms that live together, but in this case, the relationship is not necessarily beneficial to both. Parasites, for example, have a symbiotic relationship with their hosts, but only the parasite benefits. If you contract a parasite, you might consider charging rent or throwing the bum out!

symboitic in genral mean "specie specific" for ex rizobium in legume plant nodules are symbiotics

Let A = (1, 5), B = (2, 3) and C = (-2, -11)

Thus, distance between AB by distance formula

√(x2−x1)2+(y2−y1)2

Here, x1= 1, x2= 2, y1= 5 and y2= 3

So,AB=√(2−1)2+(3−5)2

AB= √5AB =5units

Now, distance between BC by distance formula

√(x2−x1)2+(y2−y1)

Here, x1= 2, x2= -2, y1= 3 and y2= -11

So,BC=√(−2−2)2+(−11−3)2

=253unitsAnd distance between AC by distance formula

√(x2−x1)2+(y2−y1)2

Here, x1= 1, x2= -2, y1= 5 and y2= -11

So,AC=√(−2−1)2+(−11−5)2

=265units

Now, for collinear lines

AB+BC=AC

After substituting the values of AB, BC and AC

√5+√53≠√265

Thus, given points are non-collinear.

Two groups of microorganisms that produce antibiotics are Bacteria (e.g, Streptomyces producesStreptomycin) and some Fungi (e.g,Penicillinproduced by Penicillium moulds).

Bacteria (e.g, Streptomyces produces Streptomycin)

Microbes also play an important role in the preparation of medicines. Antibioticsare chemicals produced by micro-organisms to kill bacteria. Streptomycin, for example, is anantibiotic. Certain microbes are also used in the biological treatment of sewage and industrial effluents.

There are mainly two classes of antimicrobial drugs: those obtained from natural sources (i.e. beta-lactam antibiotic (such aspenicillins,cephalosporins) or protein synthesis inhibitors (such as aminoglycosides, macrolides, tetracyclines, chloramphenicol, polypeptides); and synthetic agents.

1m

The bacteria develop resistance to the antibiotic by adapting their DNA structure (mutation). Thus the antibiotic will not help in killing the bacteria which is a huge problem as it contains multiple antibiotic resistant strains of bacteria called super bacteria.

apoplast and symplast

Thank you.

Virat Kohli(pronunciation(help·info); born 5 November 1988) is an Indiancricketerwho currentlycaptainstheIndia national team. A right-handed top-orderbatsman, Kohli is regarded as one of the best batsmen in the world.[3]He plays forRoyal Challengers Bangalorein theIndian Premier League(IPL), and has been the team's captain since 2013. Since October 2017, he has been the top-ranked ODI batsman in the world and is currently the leading batsman in the Test rankings.[4]Among Indian batsmen, Kohli has the best everTest rating(937 points),ODI rating(911 points) andT20I rating(897 points). Kohli is ranked as one of the world's most famous athletes byESPN[5]and one of the most valuable athlete brands byForbes.[6]

Virat Kohli

Kohli in 2018

Personal informationBornNovember 5, 1988(age30)Delhi, IndiaNicknameChikoo[1][2]Height5ft 9in (1.75m)BattingRight-handedBowlingRight-armmediumRoleTop-order batsmanRelations

Anushka Sharma(wife) (m.2017)

Websitewww.viratkohli.clubInternational informationNational side

India(2008–present)

Test debut (cap269)20 June 2011vWest IndiesLast Test3 January 2019vAustraliaODI debut (cap175)18 August 2008vSri LankaLast ODI13 March 2019vAustraliaODI shirt no.18T20I debut (cap31)12 June 2010vZimbabweLast T20I27 February 2019vAustraliaT20I shirt no.18

C. Herbivore Because they mainly eat more plants and it takes long time to digest and it is difficult for it to digest.

herbivores , because they have to digest cellulose

herbivores havethe longest small intestine

omnivorous have large intestine because there digestion takes long process

Natural gas can be obtained from microbial processes it is necessary because this is man made and can be produced other fuels can get exhuasted and this can be renewed and this fuel will be cheaper.

Polarisation of the membrane of a nerve fibre

During resting condition, the concentration of K+ions is more inside the axoplasm while the concentration of Na+ions is more outside the axoplasm.

As a result, the potassium ions move faster from inside to outside as compared to sodium ions.

Therefore, the membrane becomes positively charged outside and negatively charged inside. This is known as polarization of membrane or polarized nerve.

Duringprophasethe nucleoli disappear and the chromatin fibers thicken and shorten to form discretechromosomesvisible with the light microscope. Each replicatedchromosomeappears as two identical chromatids joined at the centromere.

Personwho isentitledto enjoy all thelegal rightsand privilegesgrantedby a state to the people comprising itsconstituency, and is obligated to obey its laws and to fulfill his or duties as called upon. Also called national. See alsodomicileandresident.

Yes, thechromosome number of zygote,embryonic celland adult is the same. Thischromosome numberis maintained constant by the process of mitosis or equational division that maintains thechromosome number. Only the gametes of an organism undergoing sexual reproduction have have thenumberofchromosomes

The nuclear membrane, also called the nuclear envelope, is a double membrane layer that separates the contents of the nucleus from the rest of the cell. It is found in both animal and plant cells. A cell has many jobs, such as building proteins, converting molecules into energy, and removing waste products.

Thenuclear membrane, also called thenuclear envelope, is a doublemembranelayer that separates the contents of the nucleus from the rest of the cell. It is found in both animal and plant cells.

the nu

Thenuclear membrane, also called thenuclear envelope, is a doublemembranelayer that separates the contents of the nucleus from the rest of the cell. It is found in both animal and plant cells. A cell has many jobs, such as building proteins, converting molecules into energy, and removing waste products.

Variation are observed because of the genetic makeup

Organisms reproducing sexually involve fusion of gametes due to which variations in the genes of the zygote takes place.This ensures the survival of the organism.This is the reason why there is more diversity among organisms which reproduce sexually.

Mitosis has four sequentialstages: prophase, metaphase, anaphase, and telophase. In prophase, each chromosome becomes condensed and morevisible, and there is the breakdown of thenuclear membraneand appearance of spindle fibers.

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Allantois serves as an excre­tory and respiratory structure.

Reproduction can be broadly classified into two types- asexual reproduction and sexual reproduction.

Asexual Reproduction: A single parent is involved in such kind of reproduction. Individuals reproduced are genetically and morphologically identical to their parents. It is more commonly observed in single-celled organisms along with some plants and animals.

Sexual reproduction is an advanced mode of reproduction. Two individuals of opposite sex are involved here and it allows the formation of new variants by the combination of the DNA from those two different individuals. This process involves the fusion of the male and the female gamete. This, in turn, produces variants, which are not identical to their parents and to themselves.

reproduction is very important for all organisms.living organism reproduce to produce young one like them.Had the process of reproduction not been there, all the plant and animal would have become extinct.

Reproduction is the process by which new organisms (offsprings) are generated. A living organism does not need reproduction to survive, but as a species, they need that for continuity and to ensure that they are not extinct. They will be extinct. This means reproduction is essential for the survival of all species.

Binary fission-amoebaRegeneration-Echinoderms (such as the sea star)Budding - Hydra

presence of more than one embryo inside the seed is called polyembryony

peristalsis is movment of oesophagus during food ball is transfered to stomach

8. Peristalsis is a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract. The process of peristalsis begins in the esophagus when a bolus of food is swallowed.9. Air sacs are tiny sacs off the larger breathing tubes (tracheae) of insects, as extensions of the lungs in birds, and as end organs in the lungs of certain other vertebrates. They serve to increase respiratory efficiency by providing a large surface area for gas exchange.

Planarians can reproduce asexually by fission (the body splits in two)

why is forest considered a natural ecosystem ?

Planaria can be cut into pieces, and each piece can regenerate into a complete organism. Cells at the location of the wound site proliferate to form amass of cellsthat will differentiate into new tissues and regenerate the missing parts of the piece of the cut planaria.Very small pieces of the planarian, estimated to be as little as 1/279th of the organism it is cut from, can regenerate back into a complete organism over the course of a few weeks.New tissues can growthat have the ability to create all the various cell types.The organism itself does not have to be completely cut into separate pieces for the regeneration phenomenon to be witnessed. In fact, if the head of a planaria is cut in half down its centre, and each side retained on the organism, it is possible for the planaria to regenerate two heads and continue to live.

Euglena and Amoeba shows binary fission

Mature spirogyraon attaining aconsiderable lengthbreaks into two or more fragments. These fragments then grow into complete organism.

Mature spirogyraon attaining aconsiderable lengthbreaks into two or more fragments. These fragments then grow into complete organism.

When the mature filament of a spirogyra attains considerable length the filament breaks up into smaller fragments or pieces, and eachfragment grows into a new filament/individual.

It undergoes Frangmentation. It breaks into filaments and these filaments further leads to new organisms.hope it helps☺

female frog lays eggs under water, usually in the spring. She may lay as many as20,000 eggs.

The female gametophyte of angiosperms is Embryosac

(1) parthenogenesis is the answer

Parthenogenesis is the right answer.

1) parthenogenesis is the correct answer

parthenogenesis others are mostly done by sexual reproduction by fusion of male and female gametes

option (1)is the right answer.

1 . parthenogenesis is correct

Parthenogenesis is right answer.

( 1) parthinogenesis

it's answer is parthogenesis . and if you thinking about parthenocarpy then it is wrong because in parthenocarpy fruit is form without fertilization and in parthogenesis embryo is form without fertilization.

(3) is correct answer

Dosto nakl krne se kuch nhi hota h so pls aaap logo ka confidence increase mt kro 3 is correct answer