MCQ 11 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Nutrition in Amoeba takes place with the help of pseudopodia.
Reason : Different stages of nutrition in Amoeba are ingestion, digestion, absorption and egestion.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- ✓
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: B. If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Amoeba is an important protozoa found in fresh water. It feeds on microscopic plants and animals present in water. The mode of nutrition in amoeba is Holozoic. And the process of obtaining food by amoeba is called phagocytosis. The different processes involved in the nutrition of amoeba are: ingestion, digestion, absorption and egestion.
View full question & answer→MCQ 21 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Photosynthesis takes place in green parts of the plants.
Reason : Photosynthesis always takes place in leaves.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- ✓
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: C. $A$ is true but $R$ is false.
Photosynthesis takes place in green parts of the plant like leaves. In a few cases the stem is green and also takes part in photosynthesis. The green part of the leaves and stem contains cells which contain the green pigment called chlorophyll. Chlorophyll traps solar energy and converts it into chemical energy during photosynthesis.
View full question & answer→MCQ 31 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Trachea does not collapse, when there is no air in it.
Reason : Trachea is supported by cartilage.
- ✓
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: A. Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
Trachea is a tube which is conunonly known as windpipe. The air coming from the nostrils during breathing passes through trachea. Trachea is supported by rings of soft bones called cartilage. Due to this, trachea does not collapse even when there is no air in it.
View full question & answer→MCQ 41 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Larynx passes air to the pharynx.
Reason : Pharynx produces sound.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- ✓
If Assertion is true, but Reason is false.
- D
If assertion is false, but Reason is true.
AnswerCorrect option: C. If Assertion is true, but Reason is false.
Briefly, the vocal folds are folds of tissue located in the larynx $($voicebox$)$ that have three important functions: To protect the airway from choking on material in the throat. To regulate the flow of air into our lungs. The production of sounds used for speech.
View full question & answer→MCQ 51 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The movement of water and dissolved salts in xylem is always upwards.
Reason : The upward movement of water is due to low pressure created by transpiration.
- ✓
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: A. Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
The plants take in water $($containing dissolved minerals$)$ from the soil through their roots. This water, called xylem sap is carried by the xylem vessels to all the parts of the plant. The xylem vessels of the root of the plant are connected to the xylem vessels of its stem. So, the water $($containing dissolved minerals$)$ enters from the root xylem vessels into stem xylem vessels. The xylem vessels of the stem branch into the leaves of plants. So, the water and minerals carried by the xylem vessels in the stem reach the leaves through branched xylem vessels. Since the cells of the leaf are losing water by transpiration, so water from the xylem vessels in the leaf will travel to the cells by osmosis to make up this loss of water. Thus, water is constantly being taken away from the top of the xylem vessels in the leaves thus reduces the effective pressure at the top of the xylem vessels. The pressure at the top of the xylem vessels $($in the leaves$)$ is lowered whereas the pressure at bottom of the xylem vessels remains high. Due to this water flows up the xylem vessels.
View full question & answer→MCQ 61 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Ultrafiltration involves filtration of blood under high pressure.
Reason : Reabsorption of major amount of water occurs in the tubular part of the nephron.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- ✓
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: B. If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
This reabsorption may be active, as in the case of glucose, amino acids, and peptides, whereas water, chloride, and other ions are passively reabsorbed. Reabsorption of water and ions also occurs in the distal tubule and in the collecting duct.
View full question & answer→MCQ 71 Mark
For two statements are given $- $ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Capillaries are the thinnest blood vessels.
Reason : Capillaries connect the branches of arteries and veins.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- ✓
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: B. Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
Capillaries are the thinnest blood vessels and connect the branches of arteries and veins. Capillaries allow the exchange of materials like nutrients, respiratory gases, hormones, etc. between the blood and body cells through tissue fluid.
View full question & answer→MCQ 81 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as.
Assertion : Translocation of solutes takes place across the phloem.
Reason : Solutes can be translocated both in upward and downward directions.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- ✓
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: B. If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
According to the classical concept inorganic solute substances are carried in the xylem vessels with the ascending sap of water in the transpiration stream whereas phloem is the pathway of downward translocation of organic solutes $($synthesised foods like sugars, amino acids, etc$).$
View full question & answer→MCQ 91 Mark
For two statements are given$-$ one labelled
Assertion $(A)$ and the other labelled
Reason $(R)$. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below:
Assertion: Blood takes up oxygen from the alveolar air and release $CO _2$ during exchange.
Reason: The concentration of $O _2$ is more in alveolar air.
- A
Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
- ✓
Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
- C
$A$ is true, but $R$ is false.
- D
$A$ is false, but $R$ is true.
AnswerCorrect option: B. Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
View full question & answer→MCQ 101 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The Bowman's capsule and the tubule together make a nephron.
Reason : The function of tubule is to allow the selective reabsorption of substances like glucose, amino acids, urea, salts and water into the blood capillaries.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- ✓
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: C. $A$ is true but $R$ is false.
The function of tubule of nephron is to allow the selective reabsorption of the useful substances like glucose, amino acids, salts and water into the blood capillaries. The waste materials like urea remains behind in the tubule. It does not get reabsorbed into blood capillaries.
View full question & answer→MCQ 111 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Ureters are the tubes which carry urine from kidneys to the bladder.
Reason : Urine is stored in the urethra.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- ✓
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: C. $A$ is true but $R$ is false.
The bladder is a bag which stores urine till the time we go to toilet. The urine collected in the bladder is passed out from the body through the urethra.
View full question & answer→MCQ 121 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Phloem helps in translocation of food from the leaves.
Reason : Phloem provides mechanical support to plant.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- ✓
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: C. $A$ is true but $R$ is false.
View full question & answer→MCQ 131 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The accumulation of lactic acid in the muscles causes muscle cramps.
Reason : During vigorous physical exercise leg muscles respire anaerobically.
- ✓
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: A. Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
When anaerobic respiration takes place in human muscles, the glucose is converted into lactic acid with release of small amount of energy. The sudden build up of lactic acid in our muscles during vigorous physical activity can cause muscular cramps.
View full question & answer→MCQ 141 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Pancreatic juice digests starch, proteins and fats.
Reason : Pancreatic juice contains digestive enzymes like pancreatic amylase, trypsin and lipase
- ✓
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: A. Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
Pancreas secretes pancreatic juice which contains digestive enzymes like pancreatic amylase, trypsin and lipase. The enzyme amylase breaks down the starch, the enzyme trypsin digests the proteins and the enzyme lipase breaks down the emulsified fats.
View full question & answer→MCQ 151 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Exchange of oxygen and carbon dioxide occurs between blood vessels and alveoli.
Reason : Oxygen diffuses from alveoli to blood vessel and carbon dioxide diffuses from blood vessels to alveoli.
- ✓
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If assertion is false, but Reason is true.
AnswerCorrect option: A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
View full question & answer→MCQ 161 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The average number of heart beat of a person at rest is about $80$ per minute.
Reason : One contraction and relaxation of the heart constitutes a complete heart beat.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- ✓
$A$ is false but $R$ is true.
AnswerCorrect option: D. $A$ is false but $R$ is true.
The average number of heart beat of a person at rest is about $70$ to $72$ per minute but the number of heart beats increases too much after a physical exercise or when a person is excited.
View full question & answer→MCQ 171 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as.
Assertion : Blood clotting prevents the leakage of blood from the site of an injury.
Reason : It reduces the loss of blood from the system.
- ✓
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Blood platelets in the bloodstream, known as thrombocytes, attach to the damaged area of the blood vessel and clump together to reduce the bleeding.
View full question & answer→MCQ 181 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : During inhalation, diaphragm flattens and increases chest cavity.
Reason : Due to this, air enters the lungs.
- ✓
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If assertion is false, but Reason is true.
AnswerCorrect option: A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
When you breathe in, or inhale, your diaphragm contracts $($tightens$)$ and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity.
View full question & answer→MCQ 191 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as.
Assertion : Left atrium receives oxygenated blood from the lungs by pulmonary vein.
Reason : In the lungs, deoxygenated blood is purified and oxygenated blood is carried in pulmonary artery.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- ✓
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: C. If Assertion is true, but Reason is false.
The pulmonary arteries carry deoxygenated blood to the lungs, where carbon dioxide is released and oxygen is picked up during respiration. Arteries are further divided into very fine capillaries which are extremely thin $-$ walled. The pulmonary vein returns oxygenated blood to the left atrium of the heart.
View full question & answer→MCQ 201 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Most of the living organisms carry out aerobic respiration.
Reason : Mitochondria is the site of aerobic respiration in the cell.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- ✓
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: B. Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
Most of the living organisms carry out aerobic respiration. For example human, dogs, cats, lions, deer, birds, lizards, grasshopper, etc. and most of the plants carry out aerobic respiration by using oxygen of air. The first step of breakdown of glucose into pyruvic acid occurs in cytoplasm. Aerobic breakdown of pyruvic acid takes place in mitochondria.
View full question & answer→MCQ 211 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Useful plant wastes are essential oils, tannin, gums, resins, natural rubber, etc.
Reason : Rubber plant is the common example of a plant which exudes latex $($used in tyre industry$)$ as an excretory product.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- ✓
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: B. If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Natural rubber is found as a milky liquid in the bark of the rubber tree, Hevea Brasiliensis. To produce the raw rubber used in tire manufacturing, the liquid latex is mixed with acids that cause the rubber to solidify.
View full question & answer→MCQ 221 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Urine formed enters the ureter through the kidneys.
Reason : It is temporarily stored in the urinary bladder.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- ✓
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: B. If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
The urinary system, also known as the renal system or urinary tract, consists of the kidneys, ureters, bladder, and the urethra. The purpose of the urinary system is to eliminate waste from the body, regulate blood volume and blood pressure, control levels of electrolytes and metabolites, and regulate blood $\ce{pH}$. The urinary tract is the body's drainage system for the eventual removal of urine. The kidneys have an extensive blood supply via the renal arteries which leave the kidneys via the renal vein.
View full question & answer→MCQ 231 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Tongue is a part of mouth that bears several taste buds.
Reason : It is helpful in producing speech.
- A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- ✓
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: B. If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Most of the taste buds in your mouth are near the tip and around the edges of your tongue, but some are also in your throat and a few are located in the roof of your mouth. When food enters your mouth, the nerve receptors send a signal to the brain to order the production of saliva.
View full question & answer→MCQ 241 Mark
For two statements are given $- $ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The large intestine is the largest part of the alimentary canal.
Reason : Tiger has a shorter small intestine, than herbivores.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- ✓
$A$ is false but $R$ is true.
AnswerCorrect option: D. $A$ is false but $R$ is true.
The small intestine is the largest part of the alimentary canal. It is about $6.5$ metres long in an adult man. Though small intestine is very long, it is called small intestine because it is very narrow. The length of small intestine differs in various animals depending on the type of food they eat. Meat is a food which is easier to digest. So, tiger which is a carnivorous animal has a shorter small intestine than herbivores.
View full question & answer→MCQ 251 Mark
For two statements are given $- $ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The plants store some of the waste products in their body parts.
Reason : Raphides are the solid waste products of plants.
- A
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- ✓
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: B. Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
The plants store some of the waste products in their body parts. For example some of the waste products are collected in the leaves, bark and fruits of the plants. The plants get rid of these wastes by shedding of leaves, peeling of bark and fruits. Some of the plant wastes get stored in the fruits of the plant in the form of solid bodies called raphides. These are removed when the fruits, get detached from the plant. For example, the 'Yam' fruit has needle shaped raphides on its surface.
View full question & answer→MCQ 261 Mark
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Ventricles have thicker walls than auricles.
Reason : Ventricles have to pump blood into various organs with great pressure.
- ✓
Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
- B
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
- C
$A$ is true but $R$ is false.
- D
$A$ is false but $R$ is true.
AnswerCorrect option: A. Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
Ventricles are larger and thick walled chambers of the heart. These act as distribution chambers, as they supply blood to all parts of our body with high pressure.
View full question & answer→MCQ 271 Mark
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Leaves are the major photosynthetic organs of a plant.
Reason : They contain chloroplasts.
- ✓
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
- C
If Assertion is true, but Reason is false.
- D
If Assertion is false, but Reason is true.
AnswerCorrect option: A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
The leaves are the primary photosynthetic organs of plants, serving as key sites where energy from light is converted into chemical energy. Similar to the other organs of a plant, a leaf is comprised of three basic tissue systems, including the dermal, vascular, and ground tissue systems.
View full question & answer→