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D) is correct answer

C) is correct answer

a) is correct answer

C) is correct answer

Ans :- The reason why CO2 is transported in the dissolved form in our body is due to the fact that the CO2 gas is more soluble in water which makes it easy for its movement unlike with oxygen where it has to work more to get dissolved.

A large volume of the CO2 in dissolved form is transported to the lungs from where it is emitted out of our body.

REFLEX ACTION

THE AUTOMATIC, INSTANTANEOUS ACTION DUE TO AN EXTERNAL OR INTERNAL STIMULUS WITHOUT ANY CONSCIOUS THOUGHT MADE BY THE GREY MATTER OF SPINAL CORD IS CALLED REFLEX ACTION.

SEQUENCES OF EVENTS WHEN WE TOUCH A HOT OBJECT

RECEPTORS PRESENT IN THE SKIN ACCEPT THE EXTERNAL STIMULUS THAT THE OBJECT IS OVERHEATED.

THE SIGNAL IS CARRIED BY THE AFFERENT NERVES TO THE NERVE CENTER WHICH IS THE GRAY MATTER OF SPINAL CORD WHERE THE INSTANTANEOUS DECISION IS MADE.

EFFERENT NERVES CARRY THE SIGNAL FROM NERVE CENTER TO THE MUSCLES.

THEN AND THEN WE LIFT UP OUR HAND.

A reflex, or reflex action, is an involuntary and nearly instantaneous movement in response to a stimulus. A reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain.

Plants get nutrients from air, water, and soil. Soil is the major source of nutrients. Thirteen of these nutrients are available from soil. The remaining three nutrients (carbon, oxygen, and hydrogen) are obtained from air and water

thq chana

Ans :- Mineral nutrients are required for plant growth. It is either a constituent of an essential metabolite or is needed for an enzymatic function. The mineral nutrition of a plant is a function of all the elements it contains which participate in metabolism.

X2+5X+6X+30X(X+5)+6(X+5) ans.....

x^2 + 11x + 30

= x^2 + 6x + 5x + 30

= x(x + 6) + 5(x + 6)

= (x + 6) (x + 5)

soil

fertilization leads to the formation of zygote

malnutrition diseases or deficiency diseases

deficiency diseases is the most correct answer

Deficiency disease is right answer of this question

deficiency diseases is the most correct answer

Fragmentation is defined as the process of breaking up of body on maturation into two or more smaller pieces. Each piece of the body results in development of new individuals. The multicellular organism which reproduces by fragmentation is spirogyra.

fragmentation is the process of breaking up of body on maturation into two or more smaller piece each piece of then developes into new dividual ( the multicellular organism which which reproduce by fragmentation is spirogyra)

1.The impulse starts in a small bundle of specialized cells located in the right atrium, called theSA node. The electrical activity spreads through the walls of theatriaand causes them to contract. This forces blood into theventricles. TheSA nodesets the rate and rhythm of your heartbeat.

3.a)Congenital heart disease

This is a general term for some deformities of the heart that have been present since birth.

b)Arrhythmia

Arrhythmia is an irregular heartbeat.

2.

All of these because the brain is the thing which controls our whole system.

All of the above.As brain is responsible for thinking, regulating the heartbeat, and impulse.

all of the above because brain control all the function of body

As the size of anorganismincreases, its surface area to volume ratio decreases. ... Largemulticellular organismstherefore cannot rely on diffusion alone to supply their cells with substances such asfood and oxygenand to remove waste products. Largemulticellular organismsrequire specialisedtransport systems.

Mostmulticellularplants and animals have too small a surface area to volume ratio so diffusionwouldbe too slow to provide the necessary molecules. Therefore, they require asystemtotransportnutrients and waste products around theorganism.

The needs of a plant and animal are similar in some aspects and very different in others.

Both need to transport food molecules around the organism but plants, for instance, do not use the transport system to fight disease.

Therefore, they require asystemtotransportnutrients and waste products around theorganism

Thanks friend

Thank you so much

Anaerobic respiration is respiration using electron acceptors other than molecular oxygen (O2). Although oxygen is not used as the final electron acceptor, the process still uses a respiratory electron transport chain called physolmere; it is respiration without oxygen.

Ans :- Ans :- Three commonrefractive defectsof the eye:

Myopia or Near-sightedness

Hypermetropia or Farsightedness

Presbyopia

Myopia

Near-sightedness: A person with Myopia can see nearby objects clearly

A person with myopia cannotsee faraway objects clearly.

The far point for the myopic eye isnearer than infinity

Occurs due toExcessive curvature of the eye lens

Elongation of eyeball

The image of a distance object is formed infront of the retinaand not on the retina

Defected is corrected by usingConcave lensessuch that the lens will bring the image back on to the retina.

Hypermetropia

Far sightedness: A person with Hypermetropia can see faraway objects clearly.

A person withHypermetropiacannot seenearby objects clearly.

The near point of the eye is more than 25cm

This arises mostly during latter stages in life, as a result of the weakening of the ciliary muscles and/or the decreased flexibility of the lens.

Focal length of the eye lens is too long

Eyeball has become too small.

The image of a distance object is formed inbehind the retina and not on the retina

Defected is corrected by usingConvex lensessuch that the lens will bring the image back on to the retina.

Hypermetropia

Far sightedness: A person with Hypermetropia can see faraway objects clearly.

A person withHypermetropiacannot seenearby objects clearly.

The near point of the eye is more than 25cm

This arises mostly during latter stages in life, as a result of the weakening of the ciliary muscles and/or the decreased flexibility of the lens.

Focal length of the eye lens is too long

Eyeball has become too small.

The image of a distance object is formed inbehind the retina and not on the retina

Defected is corrected by usingConvex lensessuch that the lens will bring the image back on to the retina.

Presbyopia

Thepower of accommodation of the eye usually decreases with ageing. The ciliary muscles weaken and thereby the flexibility of the eye lens reduces.

The near point moves away.

Spectacles with convex lenses are recommended

photosystem 1 in outer membrane of thalakoid and photosystem 2 in inner membrane of thalakoid

Electric generator, also calleddynamo, is any machine that convertsmechanical energytoelectricityfor transmission and distribution over power lines to domestic, commercial, and industrial customers. Generators also produce the electrical power required for automobiles, aircraft, ships, and trains.

The reverse conversion of electrical energy into mechanical energy is done by anelectric motor, and motors and generators have many similarities. Many motors can be mechanically driven to generate electricity and frequently make acceptable manual generators.

Inelectricity generation, ageneratoris a device that convertsmotive power(mechanical energy) intoelectrical powerfor use in an externalcircuit. Sources of mechanical energy includesteam turbines,gas turbines,water turbines,internal combustion engines,wind turbinesand even handcranks. The first electromagnetic generator, the Faraday disk, was invented in 1831 by British scientistMichael Faraday. Generators provide nearly all of the power forelectric power grids.

Inelectricitygeneration, ageneratoris a device that converts motive power (mechanical energy) intoelectricalpower for use in an external circuit.

electric generator also called dynamo is it any machine that converts mechanical energy to electricity for transmission and distribution with power lines to domestic commercial and industrial customers generator is also produce the electrical power required for automobiles aircraft and trains .

examplesof organisms which dosaprophytic nutritionare :- fungi such as mucor and Rhizobium.. , soil bacteria etc.PARASITIC NUTRITION:- it is the mode ofnutritionin which theparasiticorganism lives on the body of their host (another organisms) and getsnutritiondirectly through their body.

Example of saprophytic Nutrition :1. Rhizobium

Example of Parasitic Nutrition :2. Pitcher Plant

saprophytic nutrition: fungiparasitic nutrition: musquito

Asaprophyteor saprotroph is anorganismwhich gets its energy from dead and decaying organic matter.

This may be decaying pieces of plants or animals. This means that saprophytes areheterotrophs.

They areconsumers in the food chain. This is the typical life-style of fungi.

In 1913, for the first time ever, a virus (vaccinia) was grown in cell culture, and then in the 1930s,yellowfever and small pox viruses were grown in cell culture that aimed for vaccine production 3, 4, 5.

1-From bacteria found in their roots. Eg- Rhizobium.2 - Ur answer is attached!! Prefer this chart!!

Molluscais the second largestphylumofinvertebrateanimals. The members are known asmolluscsormollusk. Around 85,000extantspeciesof molluscs are recognized.The number of fossil species is estimated between 60,000 and 100,000 additional species.Molluscs are the largestmarinephylum, comprising about 23% of all the named marineorganisms. Numerous molluscs also live infreshwaterandterrestrialhabitats. They are highly diverse, not just in size and inanatomicalstructure, but also in behaviour and in habitat. The phylum is typically divided into 8 or 9taxonomicclasses, of which two are entirelyextinct.Cephalopodmolluscs, such assquid,cuttlefishandoctopus, are among the mostneurologically advancedof allinvertebrates—and either thegiant squidor thecolossal squidis the largest known invertebrate species. Thegastropods(snailsandslugs) are by far the most numerous molluscs and account for 80% of the total classified species.

Cleaning of water is a process of removingpollutants

Somatic cell division. The objective of mitosis is to make two genetically identicalcellsfrom a singlecell. In thecellsof our body, we start with 46 chromosomes in a singlecelland end up with 46 chromosomes in twocells. ... Therefore we will include genes on our chromosome diagrams and slide show.

There are five harmones in plant1.auxin2.gibberlins3.cytokines 4.ethylene5.absicisic acid

1. Come to open ground2. Use first Aid if needed.3.Don't use matches, candles, or any flame. Broken gas lines and fire don't mix.4.If you're in a car, stop the car and stay inside the car until the earthquake stops.5.Don't use elevators (they'll probably get stuck anyway).

The body uses feedback mechanisms to monitor and maintain our physiological activities. There are 2 types of feedback mechanisms – positive and negative. Positive feedback is like praising a person for a task they do. Negative feedback is like reprimanding a person. It discourages them from performing the said task.The human body is like any other system. It carries out a myriad of functions, and like any functioning entity, it needs a way of maintaining balance. This balance is called homeostasis. Our body employs certain methods with which it keeps a measure of how well our systems are functioning. Any imbalance is corrected as soon as possibleso the system is returned to a balanced state.Feedback Mechanisms

Our body uses the feedback it receives from a particular process to monitor how well it is functioning. Based on the outcome, it decides whether it should continue performing a specific action, or if it should stop the action. This is called a feedback mechanism.

The body uses feedback mechanisms to monitor and maintain our physiological activities. There are 2 types of feedback mechanisms – positive and negative.

Positive Feedback Mechanism

Positive feedback is like praising a person for a task they do. This praise encourages them to do more of that particular activity. On the other hand, negative feedback is like reprimanding a person. It discourages them from performing the said task, and they do the opposite instead. In the end, however, it all leads to homeostasis – maintaining a balance within the body. After all, it’s not as easy as snapping your fingers!Negative Feedback Mechanism

The term “negative” doesn’t refer to a “bad” effect, so to speak. It simply implies that the current state of an activity is not beneficial,so the body then brings about the opposite effect.

Let’s consider the case of our blood sugar level. Our blood sugar levels are mainly controlled by 2 hormones – insulin and glucagon. These are secreted by the pancreas through special cellsknown as the Islets of Langerhans. Insulin converts glucose molecules to glycogen and glucagon converts glycogen to glucose.

When the sugar concentration in our blood increases, after a meal, for example, it is detected by receptors in the pancreas. These receptors then secrete insulin. This converts glucose to glycogen, which is stored in our liver. Thus, the sugar concentration in our blood isbrought back to normal.

Conversely, when the sugar levels in our blood drop, this change is detected by the receptors in the pancreas. These stimulate the release of glucagon and stop the secretion of insulin. The glucagon converts the stored glycogen in the liver to glucose molecules, thus increasing the blood sugar concentration.

The endocrine system is a chemical messenger system consisting of hormones, the group of glands of an organism that carry those hormones directly into the circulatory system to be carried towards distant target organs, and the feedback loops of homeostasis that the hormones drive. In humans, the major endocrine glands are the thyroid gland and the adrenal glands. In vertebrates, the hypothalamus is the neural control center for all endocrine systems. The field of study dealing with the endocrine system and its disorders is endocrinology, a branch of internal medicine.[1]

thanks

These are the glands which secrete their product directly into the blood stream, they are also known as endocrine glands. For example pituitary gland, thyroid etc.

The endocrine's feedback system helps control the balance of hormones in the bloodstream. If your body has too much or too little of a certain hormone, the feedback system signals the proper gland or glands to correct the problem. A hormone imbalance may occur if this feedback system has trouble keeping the right level of hormones in the bloodstream, or if your body doesn't clear them out of the bloodstream properly.

Endocrine glands (or ductless glands) are those which release their produce or hormones directly into the bloodstream. They don't need ducts to send the hormones to another part of body.

MostDNAislocatedin the cell nucleus (where it is called nuclearDNA), but a small amount ofDNAcan also be found in the mitochondria (where it is called mitochondrialDNAor mtDNA).

cleae

explain clearly

DNA is present in chromosomes, mitochondria and plastid.

इसमें दीर्घ संधि का उपयोग हुआ है

Ablood type(also called ablood group) is a classification ofblood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of redbloodcells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on theblood groupsystem.

Within the ABO system, people can be one of four groups - O, A, B or AB, while in the Rh(D) system they can be either Rh(D) positive or Rh(D) negative. Each system is inherited independently of the other. As a result, there are eight main blood groups.

plz give me thanks and best answer

A blood type is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells. These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.

c. Use the lift should not be done.

fourpossible phenotypes: A, B, AB, & O

B)more is the right answer

The ratiobetween births and individuals in a specified population and time often expressed as number of live births per hundred or per thousand population per year. — called alsonatality.

The blood flows through the glomerulus under great pressure which is much greater than in the capillaries elsewhere .The reason for this greater pressure is that the efferent arteriole is narrower than the efferent arteriole. This high pressure causes the liquid part of the blood to filter out from the glomerulus into the renal tubule. This filtration under extraordinary force is called ultrafiltration

I will give you answer wait a minute

(i) 26 = 2 x 13

91 = 7x13

HCF =13

LCM = 2 x 7 x 13 =182

Product of the two numbers = 26 x 91 = 2366

HCF X LCM = 13 x 182 = 2366

Hence, product of two numbers = HCF x LCM

(ii) 510 = 2 x 3 x 5 x 17

92 = 2*2*23

HCF = 2

LCM = 2*2*3*5x17x23 = 23460

Product of the two numbers = 510 x 92 = 46920

HCF x LCM = 2 x 23460

HCF x LCM = 46920

Hence, product of two numbers = HCF x LCM

(iii) 336 = 2 x 2 x 2 x 2 x 3 x 7

336 = 24 x 3 x 7

54 = 2 x 3 x 3 x 3

54 =2 x 33

HCF = 2 x 3 = 6

LCM = 24x 33x 7 = 3024

Product of the two numbers = 336 x 54 = 18144

HCF x LCM = 6 x 3024 = 18144

Hence, product of two numbers = HCF x LCM