NTSE Test: Life Processes - Class 10 MCQ

The kidney is the excretory organ of the vertebrates. Each kidney has nearly one million complex tubular structures called nephrons, which are the functional units of the kidney and serve to filter wastes from the blood

1. Autotrophs are the organisms that prepare their own food, whereas, heterotrophs are the organisms that are dependent on other organisms for food.

2. Autotrophs have chlorophyll, whereas, heterotrophs lack chlorophyll.

Autotrophs are organisms that can produce their own food using light energy through photosynthesis or by using chemical energy through the process of chemosynthesis.

Hence, autotrophs obtain carbon from inorganic sources like carbon dioxide.

Heterotrophs cannot synthesize their own food and are dependent on other organisms for nutrition.

Hence, heterotrophs obtain reduced carbon in the form of carbohydrates from other organisms.

• Lymph is a colorless fluid, containing specialized lymphocytes, which are responsible for the immune responses of the body.

• Lymph is also an important carrier for nutrients, hormones, etc. Fats are absorbed through lymph in the lacteals present in the intestinal villi. Lymph lacks RBCs and platelets.

• Lymph contains white blood cells. So option (d) is correct.

b) Stomach: It is the digestive part which is J shaped and store food around 4-5 hours and churn the food with churning movement and acid and pepsinogen mix with the food which forms pepsin which helps in the digestion of protein.

c) Mouth: It is the first part of the digestive tract where food is broken down into a paste by teeth and digestion of starch starts here with the help of enzyme salivary amylase. So the correct option is 'Both B and C'.

Transpiration is the process by which plants lose water in the form of water vapor. Water vapor is almost entirely free of dissolved salts and solutes, so water lost through transpiration is essentially pure water. 

a) Respiration