Science Group
Explore subjects and practice MCQs
7
Chapters
1,610
Total MCQs
Science Group
1061
Answer: An organ is composed of different tissues organized to perform a particular function, such as the heart or stomach.
Answer: The kidney is an organ made of several tissues, whereas muscle, blood and bone are tissues.
Answer: The digestive system breaks complex food into simple substances that can be absorbed by the body.
Answer: The circulatory system, comprising the heart and blood vessels, transports blood throughout the body.
Answer: The epiglottis closes the opening of the windpipe during swallowing so that food passes only into the oesophagus.
Answer: The respiratory system brings in oxygen and removes carbon dioxide through the lungs.
Answer: Kidneys filter blood to remove waste and form urine, which is expelled through the excretory system.
Answer: The brain, spinal cord and nerves together form the nervous system that controls and coordinates body activities.
Answer: The skeleton gives the body its shape, supports it and protects organs such as the brain and heart.
Answer: The endocrine system is made of ductless glands that release hormones into the blood.
Answer: Endocrine glands secrete hormones that regulate growth, metabolism and other body functions.
Answer: Muscles contract and relax to produce movement of the body and its organs.
Answer: The reproductive system produces gametes and enables the continuation of the species.
Answer: The stomach is an organ of the digestive system where food is churned and partially digested.
Answer: Running involves coordinated action of muscles, skeleton, circulation and breathing to supply oxygen and remove carbon dioxide.
Answer: The cell is the basic structural and functional unit of all living organisms.
Answer: An organ system is a group of organs performing a coordinated set of related functions.
Answer: Phloem transports prepared food (sugars) from leaves to all parts of the plant.
Answer: Collenchyma has thickened cell corners that provide flexible support to young growing stems.
1080
Answer: Aerenchyma is parenchyma containing large intercellular air spaces that help aquatic plants float.