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The phenomenon of weightlessness occurs when there is no force of support on your body. When your body is effectively in "free fall", accelerating downward at the acceleration of gravity, then you are not being supported.

The sensation of apparent weight comes from the support that you feel from the floor, from the seat, etc. Different sensations of apparent weight can occur on a roller-coaster or in an aircraft because they can accelerate either upward or downward.

Examples:

1. Going over the top in a roller coaster

2. Putting an aircraft "over the hump" in a ballistic trajectory

Inchemistry,orbital hybridisation(orhybridization) is the concept of mixingatomic orbitalsinto newhybrid orbitals(with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to formchemical bondsinvalence bond theory. Hybrid orbitals are very useful in the explanation ofmolecular geometryand atomic bonding properties and are symmetrically disposed in space. Although sometimes taught together with thevalence shell electron-pair repulsion (VSEPR) theory, valence bond and hybridisation are in fact not related to the VSEPR model.

2)Photoperiod refers to the time that a plant or animal is exposed to light in a 24-hour period. Many types of plants require certain lengths of light exposure to enter various life cycle stages.

Inchemistry,orbital hybridisation(orhybridization) is the concept of mixingatomic orbitalsinto newhybrid orbitals(with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to formchemical bondsinvalence bond theory. Hybrid orbitals are very useful in the explanation ofmolecular geometryand atomic bonding properties. Although sometimes taught together with thevalence shell electron-pair repulsion (VSEPR) theory, valence bond and hybridisation are in fact not related to the VSEPR model.

but I want in biology

Hybridization is the process of interbreeding between individuals of different species (interspecific hybridization) orgeneticallydivergent individuals from the same species (intraspecific hybridization). Offspring produced by hybridization may be fertile, partially fertile, or sterile.

Inchemistry,orbital hybridisation(orhybridization) is the concept of mixingatomic orbitalsinto newhybrid orbitals(with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to formchemical bondsinvalence bond theory. Hybrid orbitals are very useful in the explanation ofmolecular geometryand atomic bonding properties. Although sometimes taught together with thevalence shell electron-pair repulsion (VSEPR) theory, valence bond and hybridisation are in fact not related to the VSEPR model.

Hybridization is the process of interbreeding between individuals of different species (interspecific hybridization) orgeneticallydivergent individuals from the same species (intraspecific hybridization). Offspring produced by hybridization may be fertile, partially fertile, or sterile.

true for both is the best option

(a)True( saliva mixed with food in our food after breaking process)(b)True

A green corridor is a passageway for donated organ transportation via roadwayshence option c

use distance formula for thisfind the slope and make it eqyal you will get the ans

(a)Rate of diffusionincreases with increase intemperaturedue to increase in the kinetic energy of the particles.

(b)Rate of diffusionis more for aliquidhaving lowerdensity

Inheritance involves the transfer of characters from one generation to another generation. Basic features of inheritance are elucidated.The traits could be hidden in many generations but can reappear in any generation unchanged.Traits which remain together may get separated in the next generation.One form of a particular character is exhibited frequently than the other form of the same character.

1-reproduction 2-aryabhhata

Q.no.5(b) and 6(a) answer...

Polyembryony is the phenomenon of two or more embryos developing from a single fertilized egg. Due to the embryos resulting from the same egg, the embryos are identical to one another, but are genetically diverse from the parents.

Examples are citrus and watermelon

A cross of two F1 hybrids, heterozygous for a single trait that displays incomplete dominance is predicted to give a 1:2:1 ratio among both the genotypes and phenotypes of the offspring. 1/4 will have the dominant phenotype (tall, TT), 1/2 will have the intermediate phenotype (Tt) resembling the parents of this cross, and 1/4 will have the recessive phenotype (short, tt.) When incomplete dominance occurs, it is not necessary to do a test cross to identify the heterozygotes.

If the plasma membrane ruptures or breakdown then the cell will not be able to exchange material from its surrounding by diffusion or osmosis. Thereafter the protoplasmic material will be disappeared and the cell will die.

Crop rotation :The practice of growing different crops in succession on the same land chiefly to preserve the productive capacity of the soil.

The primary disadvantage of crop rotation is that it requires increased expertise, equipment, and differing management practices. Nutrient management programs have to be altered due to differing crop requirements. Weed control practices must be altered also. However, in general, advantages of crop rotation typically outweigh the disadvantages.

It increases the soil fertility.

disadvantage of crop rotation is the soil will not fertile

The primary disadvantage of crop rotation is that it requires increased expertise, equipment, and differing management practices. Nutrient management programs have to be altered due to differing crop requirements. Weed control practices must be altered also. However, in general, advantages of crop rotation typically outweigh the disadvantages.

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Rotatinggardencropsto new areas each year assists in preventing disease and reduces insect pests. It may also prevent the depletion of nutrients in the soil, as eachcrophas its own requirements for nutrients.

Prokaryotic cell

1. Size : generally small ( 1-10 µm) Where 1 µm = 10-6m.

2. Nuclear region: It is not well defined and known as nucleoid.

3. Chromosome: single

4. Membrane-bound cell organelles absent

Eukaryotic cell

1. Size: generally large ( 5-100 µm)

2. Nuclear region: well defined and surrounded by a nuclear membrane

3. More than one chromosome.

4. Membrane-bound cell organelles are present.

This is a farming system where a farmer grows two or more different type of crops on the same piece of land at the same time.

.Inter-cropping and crop rotation are used to obtain maximum benefit. Inter-cropping helps in preventing pests and diseases to spread throughout the field.

.It increases soil fertility, whereas crop rotation prevents soil depletion, increases soil fertility, and reduces soil erosion.. Both these methods reduce the need for fertilizers. It also helps in controlling weeds and controls the growthof pathogens and pests in crops.

Inter-cropping and crop rotation are used to obtain maximum benefit. Inter-cropping helps in preventing pests and diseases to spread throughout the field. It also increases soil fertility, whereas crop rotation prevents soil depletion, increases soil fertility, and reduces soil erosion. Both these methods reduce the need for fertilizers. It also helps in controlling weeds and controls the growth of pathogens and pests in crops.

Metal carbonyl, any coordination or complex compound consisting of a heavy metal such as nickel, cobalt, or iron surrounded by carbonyl (CO) groups. They are used in the preparation of metals of exceptionally high purity and as catalysts in organic syntheses.

Waters in the region of higher ( cooler, more poleward) latitudes than tropical latitudes; literally those between the tropic of cancer and the Arctic circle in the northern hemisphere, and the tropic of Capricorn and the Antarctic circle of the southern hemisphere

it is form of static electricity

please give me another answers

charging by friction

The frictional charging process results in a transfer of electrons between the two objects that are rubbed together.

option number( b )friction

(a) spiracles is the correct answer

(b) gills is the correct answer of the given question.

a). spiraclesSpiracles is the correct answer

4.a)The breathing cycle involves inhalation and exhalation of air. One inhalation and one exhalation makes one breathing cycle. When we breathe in the thoracic cavity expands and when we breathe out the thoracic cavity contracts. Thus breathing is a rhythmic process. But the gas inhaled reaches to each and every cell through blood. So the exchange of gases is a continuous process as it takes place between the blood and each and every cell, by diffusion.

b)If conducting tubes of a circulatory system develops a leak, the blood clots. After a leak the number of platelets would get increased that minimize the leakage and inactive thrombin becomes active thrombin in the presence of thromboplasm. This active Thrombin converts the inactive fibrinogen into active fibrin and it results with a clot.

But, if a person does not develop with blood clot, immediate medical attention must be given. Otherwise it may lead to death.

c)

streptomycin is an antibiotic.

It consists of the heart and thebloodvessels running through the entire body. The arteries carrybloodaway from the heart; the veins carry it back to the heart. ... The pulmonarycirculationis where the fresh oxygen we breathe in enters theblood. At the same time, carbon dioxide is released from theblood

એક રંગસૂત્ર ડિસઓર્ડર જેમાં માદા માત્ર એક X રંગસૂત્ર સાથે જન્મે છે

monosomik rangsutra

The heart is an organ which beats continuously to act as a pump for the transport of blood, which carries other substances with it. The human heart is divided into four chambers. The upper two chambers are called right and left atrium and the lower two chambers are called the right and left ventricles. Right atrium receives carbon dioxide-rich blood from the body. Blood from right atrium enters the right ventricle, which contracts and pumps the blood to the lungs. On the other hand, oxygen-rich blood from the lungs returns to the left atrium. From the left atrium, blood enters left ventricle. Left ventricle contracts and pumps the blood to all parts of the body. Hence, the rhythmic contraction and expansion of various chambers of the heart maintains the transport of oxygen to all parts of the body.

A biotic factor is a living thing that has an impact on anotherpopulationof living things or on the environment.Abiotic factorsdo the same thing, but they are non-living. Together, biotic and abiotic factors make up an ecosystem. To survive,biotic factorsneed abiotic factors. In turn, biotic factors can limit the kinds and amounts of biotic factors in an ecosystem.

For starters, there's no such thing as acoconut tree.Coconutsgrow onpalms— which are nottrees. ...Mango treesare tropicaltreesthat belong to a floweringplantgenus whileCoconut treesare member of thePalmfamily and the only species of the coco genus. Botanically they do both produce a drupe or stone fruit

Ahoeis an ancient and versatile agricultural and horticultural hand tool used to shape soil, remove weeds, clear soil, and harvest root crops. Shaping the soil includes piling soil around the base of plants (hilling), digging narrow furrows (drills) and shallow trenches for planting seeds or bulbs.

Ans :- Sensory neurons are the cells that contain sensory receptors. They send information from the body to the central nervous system, the brain and spinal cord. They connect sensory input to other cells that are required for action. In areflex arc, the sensory neuron sends a signal to the interneuron and activates it.

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The structural and functional unit that carries out reflex action is called a reflex arc.2)it consists of five components.3)They are receptor, a sensory nerve, a association neuron, a motor nerve and aneffector organ.

Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation). Variation may be shown in physical appearance, metabolism, fertility, mode of reproduction, behaviour, learning and mental ability, and other obvious or measurable characters.

As the air heats up again, fog will slowly disappear as the tinywaterdroplets once again return to a gas in the form ofwatervapor. There are four main types of fog. Radiation fog occurs when the ground radiatesheatoutward while the air above the ground begins to cool after thesunsets.

when the bottle is closed.

With the help of SICKLE, following agricultural practices takes place:

SICKLE is used at the time of cereal crops harvesting.

It comes very handily while cutting the grass and weeds because of the curvy blades which helps to cut them efficiently.

Sickle agricultural tool is also used for preparing best hay for livestock.

Nutrition disorders are diseases that occur when a person's dietary intake does not contain the right amount of nutrients for healthy functioning, or when a person cannot correctly absorb nutrients from food. Nutrition disorders can be caused by undernutrition, overnutrition or an incorrect balance of nutrients.

One of the steps in this processing, called RNA splicing, involves the removal or "splicing out" of certain sequences referred to as intervening sequences, or introns. The final mRNA thus consists of the remaining sequences, called exons, which are connected to one another through the splicing process.

Cerebellum of thebrain maintains posture and equilibrium of the body.

The important nutrients that need to increase during adolescence includeenergy,protein,calcium, andiron.Energyneeds of adolescents are influenced by activity level, basal metabolic rate, and increased requirements to support pubertalgrowthand development.

The removal of intros from RNA is called splicing.

Thank you for my ask question .

growth in plants is dependent on plant hormones