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Glucagon and insulin regulate the level of sugar in blood. These hormones are secreted by the pancreas.

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Insulin and glucagon are hormones that help regulate the levels of blood glucose, or sugar, in our body.

Insulin is normally secreted by the beta cells (a type of islet cell) of the pancreas.

insulin hormone that help in regulating the levels of blood

Insulin . the gland which secrets this hormone was Ilets of langerhans . the beta cell secrets this hormone

insulin is a hormone which regulates the blood sugar level in the body and is produced by the gland called pancreas.Its deficiency can cause diabeteis

◆ Insulin and Glucagon are the hormones that helps regulate the levels of blood glucose or sugar In our body.

◆ Pancreas is the gland which secreted insulin hormones.

Ganong's light screen experiment demonstrates that light is essential for photosynthesis.

1. When a pot plant is kept for 48 hours in dark room, the leaves become free from starch.2. Thus dark treated plant is called destarched plant.

3. Ganong's light screen is a clip like instrument with a tin foil disc having a star shaped opening through which light can enter.

4.This closes the lower hollow cylindrical box like structure. The advantage of light screen is to allow free ventilation and at the same time it cuts off light.

5.The light screen is fixed to a leaf of the destarched potted plant as shown in the figure. The entire experimental setup is placed in sunlight for 4 to 6 hours.

6. The leaf subjected for experiment is tested for starch.

7. Only the star shaped part of the leaf exposed to the sunlight turns blue. The Ganong's light screen experiment demonstrates that light is essential for photosynthesis.

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The Miller–Urey experiment was a chemical experiment that simulated the conditions thought at the time to be present on the early Earth, and tested the chemical origin of life under those conditions. The experiment supported Alexander Oparin's and J. B

(Ori) is a sequence from where replication starts.

Any piece of DNA when linked to this sequence can be made to replicate within the host cells.

The sequence is also responsible for controlling the copy number of the linked DNA.

Monohybrid Cross

For monohybrid cross, Mendel began with a pair of pea plants with two contrasting traits i.e., one tall and another dwarf. The cross-pollinationof tall and dwarf plants resulted in tall plants. All the hybrid plants were tall. He called this as a first hybrid generation (F1) and offspring were called Filial1or F1progeny. He conducted an experiment with all the seven contrasting pairs. He observed that the entire F1progeny showed one pattern in their behavior i.e., they resembled either one of the parents. Another parent character was completely absent.

He continued his experiment with self-pollination of F1progeny plants. Surprisingly, he observed that one out of four plants were dwarf while other three were tall. The tall and the short plants were in the ratio of 3:1. He also noted that no progeny was in intermediate height i.e., no blending. The result was same for other traits of plants too. And he called them second hybrid generation and offspring were called Filial2or F2progeny.Mendel observed that traits were absent in F1generation had reappeared in F2generation. He called such suppressed traits as recessive traits and expressed traits as dominant traits. He also concluded that some ‘factors’ are inherited by offspring from their parent over successive generations.

Later, these ‘factors’ were calledgenes. Genes are responsible for the inheritance of traits from one generation to another. Genes consist of a pair of alleles which code for different traits. If a pair of alleles is same i.e., TT or tt, such alleles are called homozygous pair while those that are different or non-identical (e.g. Tt) are called heterozygous pair.

The cross between two monohybrid traits (TT and tt) is called monohybrid cross. Monohybrid cross is responsible for the inheritance of one gene. It can be easily shown through a Punnett Square.

very nice answerrrrrrr

Generally, themonohybrid crossis used to determine the dominance relationship between two alleles. Thiscrosswas originally used by biologist GregorMendel, who crossed two pea plants to obtain a hybrid variety and discovered the dominance relationships between alleles of several genes.

Disaster Management is very necessary initiative for home,School,Or any institution.As disaster is a sudden outburst.Either, It can be a Manmade disaster or Natural Disaster,it results a huge losses upon Humanity.As many people injuried/died infew seconds or many houses/buildings destroyed by disaster. So it is necessary to plan before some terrible incident occurred. ..Disaster Mangement implementation is a very crucial part in Society.

1. planning and preparedness2. mitigation3. response4. recovery

Characteristics of Pre disaster management are as follows:

1) Mitigation2) Preparedness3) Response4) Recovery

(i) In this method only a small amount of tissue is needed as the initial explant for regeneration of millions of clonal plants in a year.(ii) This method provides a possible alternative method for developing resistance in many species.(iii) It provides a mean for international exchange of plant materials, hence the problem for introduction of disease can be solved in quarantine.(iv) Stock can be quickly proliferated in vitro as it is not season dependent

Advantages of using plastic containers:1) plastic do not react with food stored in them2) plastics are light weight and are strong3) They are easy to handle and safe4) They are lower in price

Transpiration is the process by which plants absorb and distribute water through their roots and release water vapor through their leaves.

Transpiration is the primary basis by which a plant sustains its life.

Define transpiration

A similar problem is uploaded. Only replace 12 by 15 and 132 by 135 n solve

Totipotency is the ability of a living cell to express all of its genes to regenerate a whole new individual.

ability of cells to regenerate in case of injury

both A & B.

1) The andaman and nicobar island one of the seven union territories of india .2) Collection of coral and shells are banned and punishable in andaman and nicobar island .3) One must need special permission from fisheries department and forest department for collection of any coral or shells .4) The shores of the Andaman and nicobar island are losing their magnificent coral reefs because of deforestation and heavy siltation by development activities

Nitrogen dioxide (NO2)and carbon monoxide are important ambient air pollutants.

High-intensity, confined space exposure to NO2 has caused catastrophic injury to humans, including death.

Increased levels of carbon monoxide reduce the amount of oxygen carried by haemoglobin around the body in red blood cells. The result is that vital organs, such as the brain, nervous tissues and the heart, do not receive enough oxygen to work properly.

6)i) Amniocentesis is the process.ii)Amniotic fluid is being extracted by the syringe.iii)This procedure is useful for detecting the genetic defects in the foetus.iv) This process is often misused to detect or test the sex of the foetus ,due to which in case if the foetus is found to be a female the pregnancy is terminated , which leads to female foeticide.v)1-placenta 2-Amniotic fluid 3-foetal cells 4-uterine wall

are u sure it's correct

u r in class 8 right

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The major divisions in kingdom plantae are (I) Thallophyta (ii) Bryophyta(iii) Pteridophytes(iv) Gymnosperms(v) Angiosperms= The first level of classification among plants depends on whether the plant body has well differentiated reproductive tissues. The next level of classification among plants depends on whether the differentiated plants body has special tissues for conduction and water within it. Further classification looks at the ability to bear seeds and whether the seeds are enclosed within fruits.

Ans :- Evolution theory by natural selection was first formulated by Darwin's book ''on the origin of species'' is the process by which organisms change over time as a result of change in heritable physical or behavioral traits.

These changes allows an organism to better adapt to it's environment and also help it to survive and have more offspring.

The theory of evolution has been supported by proof from a wide variety of scientific discipline, including paleontology, geology, genetics and developmental biology.

The first proof is the common traits, you and your closest relatives look more alike than you and your cousins. Likewise you look more like your cousins than you do more your distant relatives and more like your distant relatives than people on the other side of the globe.

The closer you are related the more similarity you share, this is because the similarities have been inherited from a common ancestors. The more faded the distant the similarity becomes.

The species with large number of similarities tend to live near each other, Penguin species only live in the Southern Hemisphere, marsupials live almost exclusively in Australia, cacti almost exclusively in the Americas, lemurs in Madagascar etc,

If evolution was not true this geographical patterning would make no sense at all, Furthermore these similarities often seem to be completely arbitrary rather than having some selective advantage.

(2) with out muscles

4

Option (4) is correct.

bhalapur is nearly 84 km Frome the block office mohla in the rajanandgaon district of chhattisgarh

The firsttrophic levelis that of plants orproducers. Organisms in this trophic level generally get their energy from the sun converting the energy in the sun to carbohydrates.The second trophic level is that of herbivores or first level consumers. These organisms get their energy from eating plants or producers. It takes approximately 10 kg of organic mass at the producer trophic level to support 1 kg of organic mass at the first level consumer level. Another way of saying this is that roughly 10% of energy available at the previous level is available to the organism the next trophic level up.The energy continues to flow upward from the first level consumer level to the second level consumer level. Second level consumer are carnivores that get their energy from eating first level consumers. Again there is a 10% amount of the energy that flows upwards from the first level to the second level.There are carnivores that operates at the third, fourth and even fifth levels of energy. These are sometimes called top carnivores.

Metals:

Metals are usually goodconductorsof heat and electricity.

They are hard, opaque, shiny, lustrous and malleable and ductile.

Metals usually formionicbonds.

-Metals:

Non-metals are usually goodinsulatorsof heat and electricity.

They are usually brittle and have dull appearence.

-metals usually formcovalentcompounds.

option b is the right answer

option b is the right answer

organelles that are full of cell sap and provide turgidity and rigidity to the plant cell are vacuole

b point is a rig ht answer

organelles that are full of cell sap and provide turgidity and rigidity to plant cell are Vacuoles.

Avacuoleis a membrane-bound organelle. They are a kind of vesicle.Vacuolesare closed sacs, made of membranes with inorganic or organic molecules inside, such as enzymes. They have no set shape or size, and the cell can change them as it wants. They are in most eukaryotic cells and do many things.

option b is the right answer

option b is the right answer

option b. is the right answer

option, b is the right answer

option A is the correct answer

b) vacuoles is a correct answer of this question

vacuoles is the correct answer h

B) vacuoles is the right answer

c is correct options ✨😃

that's called stomata

that's called stomata and it participate in transpiration

vacules Tani raadhaniya

vacoule is full of sap provide rigidity to plant cells.

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organelles कि पौधों का रस से भरा सेल होते हैं और सूजन के साथ और संयंत्र सेल की कठोरता प्रदान

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In plant cells,vacuolesare full of cell sap and provide turgidity and rigidity to the cell. In Amoeba, the foodvacuolecontain the food items that is consumed by it and contractilevacuolesexpels excess water and some wastes from the cell.correct option is (B)

Organelles that are full of cell sap and provide turgidity and rigidity to the plant cell are Vacuoles.Correct option is (B)

Multicellular organisms contain a large number of cells. So a large number of cells divide simultaneously. They cannot survive by cell to cell division.

In multicellular organisms there is division of labour. Each cell performs different functions and divide at different time points and at specific spaces. So, cell by cell division is not possible.

Acell wallis a structural layer surrounding some types ofcells, just outside thecellmembrane. It can be tough, flexible, and sometimes rigid. It provides thecellwith both structural support and protection, and also acts as a filtering mechanism.

A cell wall is a structural layer surrounding some types of cells,just outside the cell membrane.

a protective layer on the outside of a plasma membrane of plant, fungi, and bacteria cells

a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose.

A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.

A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid.

Multicellular organisms cannot divide cell by cellbecause of the following reasons:Multicellular organismscontain a large number ofcells. So a large number ofcells dividesimultaneously. Theycannotsurvive by celltocelldivision.

plants,fungi, bacteria,algae and archaea.

Basically in plants..

The following properties contribute to soil fertility in most situations:

Sufficient soil depth for adequate root growth and water retention;

Good internaldrainage, allowing sufficient aeration for optimal root growth (although some plants, such as rice, tolerate waterlogging);

Topsoil with sufficientsoil organic matterfor healthysoil structureandsoil moistureretention;

Soil pHin the range 5.5 to 7.0 (suitable for most plants but some prefer or tolerate more acid or alkaline conditions);

Adequate concentrations ofessential plant nutrientsin plant-available forms;

Presence of a range ofmicroorganismsthat support plant growth.

Genes come in pairs, called alleles, and each pair is located in a specific position (or locus) on a chromosome. If the two alleles at a locus are identical to each other, they are homozygous; if they are different from one another, they areheterozygous.

The haploid organisms produce gametes which unite during fertilisation and form a zygote. The diploid zygote undergoes meiosis immediately to produce haploid organisms. This type of meiosis that occurs after fertilisation is called zygotic meiosis.

Itis seen that the contrasting alleles segregate during meiosis and a phenotypic ratio of 1:1 is obtained, in contrast to the 3:1 Mendelian ratio. Similarly, a ratio of 1:1:1:1 is obtained when two pairs of genes are considered instead of the 9:3:3:1 ratio.

hence, option (d) is correct

Mendel'slaw of independent assortment, statesthat allele pairs separate during the formation of gametes. Thismeansthat traits are transmitted to offspringindependentlyof one another. Mendel concluded that traits were transmitted to offspringindependently.

1. a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.

2. Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. The material that diffuses could be a solid, liquid or gas. ... One of the main characteristics of diffusion is the movement of molecules along the concentration gradient.

3.Plasmolysis is the process in which cells lose water in a hypertonic solution. The reverse process, cytolysis, can occur if the cell is in a hypotonic solution resulting in a lower external osmotic pressure and a net flow of water into the cell.

4.Imbibition is a special type of diffusion when water is absorbed by solids-colloids causing an enormous increase in volume. Examples include the absorption of water by seeds and dry wood. ... Water potential gradient between the absorbent and the liquid imbibed is essential for imbibition.

5. Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses. Guttation is not to be confused with dew, which condenses from the atmosphere onto the plant surface.

the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat.

Malnutrition is a condition that results from eating a diet in which one or more nutrients are either not enough or are too much such that the diet causes health problems. It may involve calories, protein, carbohydrates, vitamins or minerals.

Mosses also spread asexually by sending out new shoots in the spring from last years plants as well as fragmentation. Pieces of the moss body can break off, move by wind or water, and start a new plant if moisture permits.

hence, option (b) is correct.

can you answer my all questions which I posted today

no change in egg if you put it in water

And the Answer is 1.11111111111111111111111111111111111111... mention not!🙂

stroma is the right answer

the right answer is 1 stroma

chlorophyll is present in the stroma of the chloroplast.

is answer (1). stroma

(1) stroma is correct answer that question

this answer is stroma

ln chloroplast,chlorophyll is present in the Stroma

The correct answer is Thylakoids.

stroma is the corret option of this question

in chloroplast chlorophyll is present in the stroma

answer. 1 detail solution Chlorophyll is the light trapping pigment found in the chloroplast of green plants. Chloroplasts are structurally made up of two components- thylakoids (internal membrane structures) and stroma. Some of the thylakoid membranes are stacked one above the other and are called as grana. The grana contain light trapping pigment chlorophyll and are thus the site of light reaction. The stroma contains enzymes, which are responsible for dark reaction part of photosynthesis.

The green pigment chlorophyll is located within thethylakoidmembrane, and the space between thethylakoidand the chloroplast membranes is called thestroma