Which of the following does the transportation work in plants?

• Xylem

• Phloem

• Both 1 and 2

• None of these

Answer explanation

Xylem and phloem both are responsible for transportation in plants. Xylem transports water and minerals, obtained from the soil to the plant. Phloem transports food materials from the leaves to all parts of the plant body.

Which of the following statement is correct. Statement 1: Xylem transports only upward. Statement 2: Xylem transports in both directions. Statement 3: Phloem transports only upward Statement 4: Phloem transports in both direction.

• Statement 1 and 3

• Statement 2 and 4

• Statement 2 and 3

• Statement 1 and 4

Answer explanation

Xylem transports water and minerals obtained from the soil, to the plant body. Thus transportation takes place in upward direction. Phloem transports food materials from the leaves, which is needed to be transported in all parts of the plant body. Therefore, transportation takes place in both upward and downward direction. Thus, option 4 is correct answer.

Which of the following helps us to stop blood flow when we get injured?

• RBC

• Platelets cell

• WBC

• Hemoglobin

Answer explanation

Platelets cell helps to stop blood flow when we get injured by creating blood clot at injury.

In how many chambers is the human heart divided?

• 3

• 2

• 4

• 5

Answer explanation

Human heart is divided into 4 chambers. They are - Right atrium, Right ventricle, Left atrium, Left ventricle.

For which of the following organisms the given statement is true? "During circulation, some amount of deoxygenated blood gets mixed with the oxygenated blood."

• Amphibian and reptiles

• Amphibian and mammals

• Reptiles and birds

• Birds and fishes

Answer explanation

Amphibians and reptiles have three chambered heart. Due to this reason, some amount of deoxygenated blood is mixed with oxygenated blood. Mammals have four chambered heart. Fishes have 2 chambered heart.

Which of the following is not transported by plasma in dissolved form?

• Digested food

• Oxygen

• Carbon dioxide

• nitrogen waste material

Answer explanation

Plasma transports food, carbon dioxide and nitrogenous waste in dissolved form. However, oxygen is carried by red blood corpuscles (RBC).

Nikhil used to smoke cigarettes, which caused him a lung cancer. Then which of the following life process of Nikhil will get affected?

• Transportation

• Excretion

• Respiration

• Nutrition

Answer explanation

Respiration is the process which is performed in lungs. Hence, any issue with lungs will affect the respiration process.