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Option AMost autotrophs make their "food" through photosynthesis using the energy of the sun.Heterotrophscannot make their own food, so they must eat or absorb it. Chemosynthesis is used to produce food using the chemical energy stored ininorganicmolecules.

The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), byJames WatsonandFrancis Crickmarked a milestone in the history of science and gave rise to modern molecular biology, which is largely concerned with understanding how genes control the chemical processes within.

the twisted -ladder st... of DNA by James Watson or Francis Crick

The plant cell wall is composed of cellulose. Cellulose is a structural carbohydrate and is considered a complex sugar because it is used in bothprotectionandstructure. The plant cell wall consists of three layers. Each layer has its own uniquestructureand function

Size

Animal cells are generally smaller than plant cells. Animal cells range from 10 to 30 micrometers in length, while plant cells range from 10 and 100 micrometers in length.

Shape

Animal cells come in various sizes and tend to have round or irregular shapes. Plant cells are more similar in size and are typically rectangular or cube shaped.

Energy Storage

Animals cells store energy in the form of the complexcarbohydrateglycogen. Plant cells store energy as starch.

Proteins

Of the 20amino acidsneeded to produceproteins, only 10 can be produced naturally in animal cells. The other so-called essential amino acids must be acquired through diet. Plants are capable of synthesizing all 20 amino acids.

Differentiation

In animal cells, onlystem cellsare capable of converting to other cell types. Most plant cell types are capable of differentiation.

Growth

Animal cells increase in size by increasing in cell numbers. Plant cells mainly increase cell size by becoming larger. They grow by absorbing more water into the centralvacuole.Cell Wall

Animal cells do not have acell wallbut have acell membrane. Plant cells have a cell wall composed of cellulose as well as a cell membrane.

Centrioles

Animal cells contain these cylindrical structures that organize the assembly of microtubules duringcell division. Plant cells do not typically contain centrioles.

Cilia

Cilia are found in animal cells but not usually in plant cells.Ciliaaremicrotubulesthat aid in cellular locomotion.

CharacterAnimal cells1.CellwallAbsent. Outermost covering is plasma membrane.2.PlastidsAbsent3.VacuoleMany and small vacuoles4.CentriolePresent3 more rows

1.19 percent loss hua usko

7250-6090=1160

the answer is 1160

loss percentage = (7250-6090)/7250×100= 15.9122134..........

7259-6090=1160 the answer is 1160

Solution:

(i)Volume : 3x² – 12x

Since,volume is product of length, breadth and height therefore by factorizing thegiven volume, we can know the length, breadth and height of the cuboid.

3x²–12x

=3x(x – 4)

Hence,possibleexpression for length = 3

Possibleexpression for breadth = x

Possibleexpression for height = (x – 4)

(ii)Volume : 12ky² + 8ky – 20k

Since,volume is product of length, breadth and height therefore by factorizing thegiven volume, we can know the length, breadth and height of the cuboid.

12ky²+ 8ky – 20k

=4k(3y² + 2y – 5)

[Bymiddle term splitting]

=4k(3y² +5y-3y-5)

= 4k[y(3y+5)-1(3y+5)]

= 4k(3y +5) (y – 1)

Hence,possibleexpression for length = 4k

Possibleexpression for breadth = (3y +5)

Possibleexpression for height = (y – 1)

The most effective and safest methods of birth control are sterilization by means of vasectomy in males and tubal ligation in females, intrauterine devices (IUDs), and implantable birth control. This is followed by a number of hormone-based methods including oral pills, patches, vaginal rings, and injections.

(d) is correct option

D) is the correct answer

D) sterilisation techniques is the correct answer

option d is the right answer

a)

b)Valency means combining capicity of an element .

Relationship between the number of valence electrons and valency:

Valence electrons are the number of electrons present in the outermost shell of an atom.

Valency is the combing capicity of an element to form bonds with the other elements.

For Example:

Let us take the case of Oxygen whose Atomic number is 8.Thus,its electronic configuration is 2,6.

Oxygen has 6 electrons in its outermost shell and requires 2 more electrons to complete its octet state.

So,here Oxygen has 6 valence electrons and 2 as its valency .

The number of valence electrons increases from left to right in the periodic table.

If the number of valence electrons of an element is equal to 4 as that of carbon,the the element would also have same valency that is 4.

Human immunodeficiency virus (HIV) is a virus that attacks immune cells called CD4 cells, which are atypeof T cell. These are white blood cells that move aroundthebody, detecting faults and anomalies in cells as well as infections. ... However, a person can carryHIVwithout experiencing symptoms for alongtime.

Aids can be transmitted from person to person in many ways:

By unprotected intercourse with an infected person

By Blood transfusion

From mother to a child (By birth), it can also be spread by breastfeeding

Through oral sex, in some cases it can possible by deep kissing

By the use of hypodermic needles

AID=Acquired Immune Deficiency

a)AIDSb)HIV virusc)Sexual transmission, transmission of viruses through blood transfusion.

1) Loss of vegetation cover.

2) Pollution of water from industrial effluents and urban wastes.

answer gujarati ma send karo

Sexual division of labour means division of work on thebasis of the gender difference and according to this concept, all house workand responsibility of bringing up children is women's work.

Women all over the world have been demanding :

(a) Equal voting rights.

(b) Enhancement of political and legal status of women.

(c) Improvement of educational and career opportunities forwomen.

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2. Larynx, is also called adam apple

2 larynx is also called adam's apple

option (b) is correct.

Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis. The absorbed water is transported through the roots to the rest of the plant where it is used for different purposes: It is a reactant used in photosynthesis.

Microsoft PowerPoint is an easy program to use and a powerful tool for giving a presentation. Whether your presentation needs a visual kick, tools for collaboration, easy access or the ability to share information beyond the initial meeting, PowerPoint is a good option. It can even help reduce speaking anxiety by drawing eyes away from the speaker and towards a screen. Just do not expect this technology to substitute for sound and dynamic speaking skills.

MS Paint use to draw any sketch and to edit image.

Though a large percentage of the total area is desert and even though there is little forest cover, Rajasthan has a rich and varied flora and fauna.

The natural vegetation is classed as Northern Desert Thorn Forest (Champion 1936).

These occur in small clumps scattered in a more or less open forms.

Density and size of patches increase from west to east following the increase in rainfall.

The Northwestern thorn scrub forests lie in a band around the Thar Desert, between the desert and the Aravallis.

It was subsequently named "Peak XV". In 1865, it was renamed Mt. Everest to honor Sir George. Everest is also called Chomolungma in Tibet and Sagarmatha in Nepal.

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1. An Atom is the smallest and an indivisible unit of matter. Ions are Atoms with an electrical charge.2. In an Atom the number of electrons and protons will be equal while in an ion they would be unequal.3. An Atom can take part in a chemical reaction while an ion cannot.4. An ion can exist independently while an Atom cannot.5. Atoms are generally unstable while Ions are stable.6. Atoms combine to form a molecule while Ions form an electrovalent bond.

Pepsinis an endopeptidase that breaks downproteins intosmaller peptides (that is, a protease). It is produced in the stomach and is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest theproteinsin food

The answer is angiosperms

angiosperms

thanks

angiosperm

Dihybrid cross is a cross between two different lines/genes that differ in two observed traits. According to Mendel's statement, between the alleles of both these locus there is a relationship of complete dominance - recessive

-African trypanosomiasis, also known as sleeping sickness, is an insect-borneparasitic disease of humans and other animals.

-It is caused by protozoa of the species Trypanosoma brucei. There are two types thatinfecthumans, Trypanosoma bruceigambiense(TbG) andTrypanosoma brucei rhodesiense(TbR).

-They are transmitted to humans by tsetse fly (Glossina genus) bites which have acquired their infection from human beings or from animals harbouring human pathogenic parasites.

Phanerogams includes higher plants that bear flowers and seeds.They contain an embryo along with stored food which serves for the initial growth of the embryo during germination.The plant body is sporophytic and differentiated into root,stem and leaves.Vascular system (xylem and phloem) are well developed.Sex organs are multicellular.Criteria for division:on the basis of naked or protected ovules and absence or presence of fruits , the sub kingdom Phanerogams are divided into two subdivision. They are:1. Gymnosperms 2. Angiosperms

Plants with well differentiated reproductive tissues that ultimately makes seed is called phanerogams

Phanerograms- They are plants.____________________________•They have well differentiated reproductive system•Include gymnosperm and angiosperm•Seeds are present•Plant have covered embroys with stored food called "seeds"•Have a proper vascular tissue

This is a structure of trypanosoma, which causes sleeping sickness..

option. d.

Angiosperms ; Dicotyledons

When two or more computers are connected together so they can communicate with one another, they form a network. The largest computer network in the world in the Internet.

Thefivemost well knownclasses of vertebrates(animals with backbones) are mammals, birds, fish, reptiles, amphibians. They are all part of the phylum chordata -- I remember "chordata" by thinking of spinal chord. There are also a lot of animals without backbones.

Proper farm management Good guality of foodsMedicines on time

Below are the four important components of poultry farm management:

1) Selection of disease free and suitable breeds.

2) Proper and safe farm conditions.

3) Proper food and water.

4) Maintenance of hygiene and health care.

1) Selection of disease free and suitable breeds.

2) Proper and safe farm conditions.

3) Proper food and water.

4) Maintenance of hygiene and health care.

Vertebratesare furtherclassified according toseveral criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are furtherclassified intoclasses Pisces, Amphibia, Reptilia, Aves and Mammals. Pisces include the fishes.

Vertebratesare furtherclassified according toseveral criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are furtherclassified intoclasses Pisces, Amphibia, Reptilia, Aves and Mammals. Pisces include the fishes.

Amphibians among plant belongs to Bryophyte.

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Thallophytahas the simplest organismsinplants division. Thallophyta is the lowest group ofplants. This grouphas the simplest organisms

1 In 1914 the majority of the 166 million population were Slavs but as well as Jews and Turks there were dozens of other nationalities. Several of these groups wanted regional autonomy and this was the cause of a constant source of political conflict.

2TsarNicholas IIruled the Russian Empire as an absolute monarch. However, following the loss of the war with Japan in 1905, serious disturbances took place in St. Petersburg and Nicholas was persuaded to accept a reduction in his power.

3In 1914 theRussian Armywas the largest army in the world. However, Russia's poor roads and railways made the effective deployment of these soldiers difficult