Grade 7 Science Quiz: Animal Life Processes (Set 2)

Question 1

In Amoeba, once the food is engulfed by pseudopodia, it is trapped inside a specific structure for digestion. What is this structure called?

Accepted Answer

C) Food vacuole

Answer

A) Nucleus

Answer

B) Contractile vacuole

Answer

D) Cytoplasm

Question 2

Ruminants like cows can digest cellulose, which humans cannot. Which part of their stomach contains bacteria that help in this process?

Accepted Answer

B) Rumen

Answer

A) Abomasum

Answer

C) Omasum

Answer

D) Reticulum

Question 3

If the surface area of the small intestine is increased by finger-like projections called villi, and each villus increases the area by $a$ units, the total absorption efficiency is proportional to:

Accepted Answer

A) The total surface area available

Answer

B) The length of the large intestine

Answer

C) The volume of the stomach

Answer

D) The amount of water ingested

Question 4

During heavy exercise, our muscle cells undergo anaerobic respiration. Identify the correct chemical equation for this process:

Accepted Answer

D) $	ext{Glucose} ightarrow 	ext{Lactic Acid} + 	ext{Energy}$

Answer

A) $	ext{Glucose} ightarrow CO_2 + 	ext{Water}$

Answer

B) $	ext{Glucose} ightarrow 	ext{Alcohol} + CO_2 + 	ext{Energy}$

Answer

C) $	ext{Glucose} ightarrow 	ext{Acetic Acid} + 	ext{Energy}$

Question 5

When we exhale, what is the movement of the diaphragm and the ribs?

Accepted Answer

B) Diaphragm moves up, ribs move down and inwards

Answer

A) Diaphragm moves down, ribs move out

Answer

C) Diaphragm and ribs both move upwards

Answer

D) Diaphragm stays flat, ribs move out

Question 6

An insect like a cockroach has small openings on the sides of its body for gas exchange. These are called:

Accepted Answer

C) Spiracles

Answer

A) Gills

Answer

B) Lungs

Answer

D) Stomata

Question 7

Rohan got a cut on his finger, and it stopped bleeding after a few minutes due to the formation of a dark red clot. Which component of blood is responsible for this?

Accepted Answer

B) Platelets

Answer

A) Red Blood Cells (RBCs)

Answer

C) White Blood Cells (WBCs)

Answer

D) Plasma

Question 8

Which blood vessel carries carbon dioxide-rich (deoxygenated) blood from the heart to the lungs?

Accepted Answer

A) Pulmonary artery

Answer

B) Pulmonary vein

Answer

C) Aorta

Answer

D) Vena cava

Question 9

If a person's heart beats 18 times in 15 seconds, what is their pulse rate per minute?

Accepted Answer

C) 72 beats/min

Answer

A) 60 beats/min

Answer

B) 108 beats/min

Answer

D) 80 beats/min

Question 10

Aquatic animals like fish excrete cell waste as a gas which directly dissolves in water. This gas is:

Accepted Answer

D) Ammonia

Answer

A) Carbon dioxide

Answer

B) Nitrogen

Answer

C) Oxygen

Question 11

The process of transpiration in plants serves a similar function to which animal process regarding temperature regulation?

Accepted Answer

A) Sweating

Answer

B) Digestion

Answer

C) Circulation

Answer

D) Excretion

Question 12

In the human excretory system, the filtered urine is carried from the kidneys to the urinary bladder by which tubes?

Accepted Answer

B) Ureters

Answer

A) Urethra

Answer

C) Nephrons

Answer

D) Capillaries

Question 13

Why is blood red in color?

Accepted Answer

C) Due to Hemoglobin in RBCs

Answer

A) Due to presence of Plasma

Answer

B) Due to WBCs

Answer

D) Due to the presence of nutrients

Question 14

Bile juice is stored in the gall bladder and helps in the digestion of which component of food?

Accepted Answer

A) Fats

Answer

B) Proteins

Answer

C) Carbohydrates

Answer

D) Vitamins

Question 15

The process of utilizing absorbed food for growth and energy by the body cells is known as:

Accepted Answer

D) Assimilation

Answer

A) Ingestion

Answer

B) Digestion

Answer

C) Absorption

Question 16

Which of the following is the correct pathway of air in humans during inhalation?

Accepted Answer

C) Nostrils $\rightarrow$ Pharynx $\rightarrow$ Trachea $\rightarrow$ Lungs

Answer

A) Nostrils $\rightarrow$ Lungs $\rightarrow$ Pharynx $\rightarrow$ Trachea

Answer

B) Nostrils $\rightarrow$ Trachea $\rightarrow$ Pharynx $\rightarrow$ Lungs

Answer

D) Lungs $\rightarrow$ Trachea $\rightarrow$ Pharynx $\rightarrow$ Nostrils

Question 17

Dialysis is a treatment given to patients when which of their organs fail to function?

Accepted Answer

B) Kidneys

Answer

A) Heart

Answer

C) Liver

Answer

D) Lungs

Question 18

Sweating serves two purposes: cooling the body and:

Accepted Answer

A) Removing excess water and salts

Answer

B) Absorbing oxygen from air

Answer

C) Digesting proteins

Answer

D) Circulating blood

Question 19

In a closed circulatory system, the blood vessels with the thinnest walls that allow for the exchange of materials are:

Accepted Answer

B) Capillaries

Answer

A) Arteries

Answer

C) Veins

Answer

D) Aorta

Question 20

What happens to the breathing rate of a person during heavy physical activity?

Accepted Answer

C) It increases to provide more oxygen

Answer

A) It decreases

Answer

B) It stays the same

Answer

D) It stops momentarily