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This is diffusion across a semi permeable membrane.

A cell wall provides structure for plant and bacterial cells, is most definitely semi-permeable in plants, allowing small molecules and proteins to pass through based on size, anything under about 30 Kilodaltons. Then the membrane manages the actual transfer of materials to the interior of the cell. However, the cell wall provides low-level nutrients like water and carbon dioxide to flow directly into the cell, and excretion of low-level substances like oxygen to leave the cell. For a plant cell there is a cell membrane INSIDE the cell wall.

Higher level organisms like animals do not have a cell wall, just a cell membrane. For these cells, the cell membrane also manages the movement of water, CO2 and oxygen in and out of the cell, and for all plant and animal cells the membrane is usually "selectively" permeable to specific preferred ions and organic molecules, and has lipid-protein complexes embedded in it to assist in the transfer of other molecules into the cell that the membrane is not initially permeable to. In this sense, a cell membrane is semi-permeable as well.

cell wall is called completely permeable as it allows nothing to pass through it but cell membrane allows only some particles which are of the size of its pores to pass through it.

Mendel'sLaw of Dominancecan also be simply stated as: “In a cross of parents that are pure for contrasting traits, only one form of the trait will appear in the next generation. Offspring that are hybrid for a trait will have only thedominanttrait in the phenotype.”

in easy language

turgor is the right answer...

imbibbition is right

turgur is the right answer

turgor is the right answer...

imbibition is the right one

imbibition is the right one

turgor is the righg one.....

imbibition is right answer

option 1 is the right answer

option 1 is correct answer

imbibition is right answer.

1. turgor pressure is the correct answer

turgor pressure is the correct answer..

turgor is the correct answe

option 1,turgor pressure

Due to the turgor pressure

option 1,turgor is the right answer

option A is tje correct answer

turgor is the pressure which develops on the cell

(d) green pod colour.

answer is option 3 for 74 and 3 for 75

it will be filled in 1 hour that is 60 minutesso the bacteria will be half filled in 59 minutes.. because bacteria divides every minute

William Gilbert

William Gilbert invented the gold leaf electroscope

b. Charles f richter

1 unit of energy is equal to 1 kilowatt hour (kWh).1 unit = 1 kWh1 kWh = 3.6 x10^6JTherefore, 250 units of energy = 250 x3.6 ×10^6= 9 x10^8J.

1)It is necessary because:- 1. To avoid incidents in future

2. To increase public awareness

3. To teaching public measures to be taken during the disaster .

2)The disaster I have faced is flood,but fortunately my swimming skills helped me to escape from the disaster.

the power plant is based in natural gad

Noise pollution affectsboth health and behavior. Unwantedsound(noise) can damage physiological health.Noise pollutioncan cause hypertension, high stress levels, tinnitus, hearing loss, sleep disturbances, and other harmfuleffects.

Bioaccumulation is the build-up of chemicals inside of living organisms. The two causes of bioaccumulation are the amount of the chemical coming into the living organism faster than the organism can use it and the living organism not being able to break down or excrete the chemical.

Biomagnification is a cumulative increase in the concentrations of a persistent substance (e.g. pesticides, metals, etc.) as it moves up the food chain. This occurs when agricultural, industrial, or human waste pours into the ocean directly or via rivers, sewage, etc.

Bioaccumulationrefers to the accumulation of a toxic chemicalin thetissue of a particular organism.

Biomagnificationrefers to the increased concentration of a toxic chemical the higher an animal is on the food chain.

Biodiversity generally refers to the variety and variability of life on Earth. According to the United Nations Environment Programme, biodiversity typically measures variation at the genetic, species, and ecosystem level.

Ranthambore National ParkJim Corbett National Park

Nylon fibres are strong, elastic and light. It is lustrous and easy to wash. So, it became very popular for making clothes.

option b )FSH

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Nephrons are the basic filtering units of kidneys. Each kidney possesses large number of nephrons, approximately 1-1.5 million. The main components of the nephron are glomerulus, Bowman's capsule, and a long renal tubule.Functioning of a nephron:

→ The blood enters the kidney through the renal artery, which branches into many capillaries associated with glomerulus.

→ The water and solute are transferred to the nephron at Bowman's capsule.

→ In the proximal tubule, some substances such as amino acids, glucose, and salts are selectively reabsorbed and unwanted molecules are added in the urine.

→ The filtrate then moves down into the loop of Henle, where more water is absorbed.

→ From here, the filtrate moves upwards into the distal tubule and finally to the collecting duct. Collecting duct collects urine from many nephrons.

→ The urine formed in each kidney enters a long tube called ureter. From ureter, it gets transported to the urinary bladder and then into the urethra.

Nephrons are the basic filtering units of kidneys. Each kidney possesses large number of nephrons, approximately 1-1.5 million. The main components of the nephron are glomerulus, Bowman's capsule, and a long renal tubule.Functioning of a nephron:

→ The blood enters the kidney through the renal artery, which branches into many capillaries associated with glomerulus.

→ The water and solute are transferred to the nephron at Bowman's capsule.

→ In the proximal tubule, some substances such as amino acids, glucose, and salts are selectively reabsorbed and unwanted molecules are added in the urine.

→ The filtrate then moves down into the loop of Henle, where more water is absorbed.

→ From here, the filtrate moves upwards into the distal tubule and finally to the collecting duct. Collecting duct collects urine from many nephrons.

→ The urine formed in each kidney enters a long tube called ureter. From ureter, it gets transported to the urinary bladder and then into the urethra.

there are three types of muscles (I) Striated muscles (ii) unstriated muscles (iii) cardiac muscles

Hypertrophy is an increase inmusclemass due to the addition of structural proteins. ... Resistanceexercisecauses hypertrophy. Power-producingmuscleshave a higher number of FG fibers than of slow fibers. Strenuousexercisecausesmusclecell damage that requires time to heal

1. Reduce food waste2. Save water3. Make your own cleaning products4. Save electricity5. Drive less to save petrol6. Reuse containers7. Start a garden8. Minimise wastage of paper9. Stop using plastic bags10. Minimise using synthetic products instead of natural.

The major causes of species losses in a geographical region are:(i)Habitat loss and fragmentation.(ii)Over-exploitation of natural resources.(iii)Alien species invasions can cause decline or extinction of indigenous species.(iv)Co-extinctions, i.e. when a species become extinct, the plant and animal species associated with it in an obligatory way, also become extinct.

Infections are caused by microscopic organisms known as pathogens.can also be transmitted through our skin through insect or animal bites. The best way to prevent infections is to block pathogens from entering the body.

Two ways are:

1.Practice good food-safety techniques to avoid getting sick

2.Vaccinations are essential if you are to avoid getting sick

1. vaccination2.personal hygiene like washing hands, safe handling of food, wearing masks etc

vaccination is the best way

diseases can be prevented by healthy life style and proper vaccination

total number of muscles in human body is 650.

correct

They are also called antagonistic muscles . The first muscle does an action which the second muscle can reverse.

Ans :- 1. The transmission of signals is not a continuous process. The nervous system becomes unable to transmit signals immediately after it has transmitted one signal.

2. The nervous system also does not connect with every part of the body.

1)parathyroid hormone2)This response to gravity iscalled geotropism, or gravitropism. Therootsare exhibitingpositive geotropism, or growth with gravity, while the stem is exhibiting negativegeotropism, or growth against gravity. Different parts of a plant grow in opposite directions because they have different functions.3)phototropism4)a specialized cell transmitting nerve impulses; a nerve cell

Thesomatic nervous system(SNSorvoluntary nervous system) is the part of theperipheral nervous system associated with the voluntary control of body movements viaskeletal muscles.

Ans :- Fatigue more quickly thansmoothor cardiac muscles. Are able to stretch and resume original shape.Striated appearance comes from formation of actin and myosinmuscle fibres. Smooth musclesare found inthewalls of hollow structures, including veins and blood vessels.

Glycerin is used to prevent the drying of the leaf and safranine is used for giving a darker shade to the leaf or stomata

The medulla oblongata is part of the brain stem that controls most of these involuntary actions (The brain stem is the posterior part of the brain that is continuous with the spinal cord. It is made up of three segments; the medulla oblongata, the midbrain and the pons).

Here are some of the regions of the medulla and their functions:

i) Reflex centers - this is responsible for reflexes such as swallowing, vomiting, sneezing and coughing.

ii) The cardiac center - responsible for the regulation of the heart rate.

iii) The vasomotor center - this is responsible for the regulation of blood pressure.

iv) Respiratory center - this is responsible for the breathing activity.

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. Remove a healthy leaf from the potted plant.

2. Remove a part of the peel from the lower surface of the leaf. You can do this by folding the leaf over and gently pulling the peel apart using forceps. Keeps the peel in a watch glass containing water.

3. Put a few drops of safranin stain in a watch glass.

4. After 2-3 minutes take out the peel and place it on a clean glass slide.

5. Put a drop of glycerin over the peel and place a clean coverslip gently over it with the help of a needle.

6. Remove the excess stain and glycerin with the help of blotting paper.

7. Observe the slide under the low-power and high-power magnifications of the compound microscope.

1. Remove a healthy leaf from the potted plant.

2. Remove a part of the peel from the lower surface of the leaf. You can do this by folding the leaf over and gently pulling the peel apart using forceps. Keeps the peel in a watch glass containing water.

3. Put a few drops of safranin stain in a watch glass.

4. After 2-3 minutes take out the peel and place it on a clean glass slide.

5. Put a drop of glycerin over the peel and place a clean coverslip gently over it with the help of a needle.

6. Remove the excess stain and glycerin with the help of blotting paper.

7. Observe the slide under the low-power and high-power magnifications of the compound microscope.

The occasion of tree plantation in July/August is called Van Mahotsav.

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As bile helps in the emulsification of fats and it also makes the medium alkaline for the pancreatic enzymes to act...

i)Liverii)Pancreasiii)parietal cells (also called oxyntic cells) in the gastric glands in the stomach.iv)small intestine

fat is the right answer from my view because I am I 9

none of these because this color indicates the presence of iodine

carbohydrates is the answer

right answers carbohydrates

d is the right answer

Blue black colour indicates the presence of starch in potato extract.

carbohydrates is the correct answer