alleryStart learning →The average adult holds roughly how much blood?
- 1 litre
- 3 litres
- 10 litres
- 5 litres
Show answer and solution
Correct answer: D. 5 litres
An average adult has a blood volume of roughly 5 litres.
Olympiad (Class 7) Transportation in plants and animals — practice questions — page 2
Explore 60 free Transportation in plants and animals questions in Olympiad (Class 7) Science. Open each question or exercise to read its content, reference answers and available explanation.
Practise Transportation in plants and animals with Quill →Transportation in plants and animals questions and exercises with answers
Showing questions 31–60 of 60.
The average adult holds roughly how much blood?Read the answer and worked solution →Which blood cells number in millions in every microlitre?Read the answer and worked solution →Which of these is a waste product carried away by blood?Read the answer and worked solution →Blood turning from a liquid to a semisolid gel to stop bleeding is called:Read the answer and worked solution →Which protein forms a mesh over the platelet plug in a clot?Read the answer and worked solution →The cancer of white blood cells is called:Read the answer and worked solution →A passenger sits still for 12 hours and clots form in the leg veins. This condition is:Read the answer and worked solution →Fatty plaques building up in artery walls and narrowing them is called:Read the answer and worked solution →Which instrument is used to take a person's blood pressure?Read the answer and worked solution →Which instrument can measure how fast a plant loses water?Read the answer and worked solution →Loss of water vapour from the leaves and stems of a plant is called:Read the answer and worked solution →A wilting plant closes its stomata. What is a direct result?Read the answer and worked solution →What share of the water taken in by roots is lost to the air?Read the answer and worked solution →Which cells border a stoma and control its opening?Read the answer and worked solution →Which tissue carries water from the root up to the leaves?Read the answer and worked solution →By which process does water from the soil enter the roots?Read the answer and worked solution →Water molecules sticking to each other helps pull water up the xylem. This property is:Read the answer and worked solution →Water climbs up a very thin glass tube dipped in a beaker. What is this effect?Read the answer and worked solution →On which day would a leaf lose water fastest?Read the answer and worked solution →Which feature helps a desert plant lose less water?Read the answer and worked solution →Why do desert plants open stomata only at night to save water?Read the answer and worked solution →Why does a cactus lose very little water through its green stem?Read the answer and worked solution →Why does transpiration cool a plant?Read the answer and worked solution →A crop has a transpiration ratio of 500. How much water is transpired for 2 kg of dry matter?Read the answer and worked solution →Why do large animals need a circulatory system?Read the answer and worked solution →What is the benefit of a double circulation with a four-chambered heart?Read the answer and worked solution →Which valve lies between the right atrium and the right ventricle?Read the answer and worked solution →In an arthropod, hemolymph is drawn back into the heart through which openings?Read the answer and worked solution →Which free-floating cells in insect hemolymph help defend against germs?Read the answer and worked solution →In birds and other non-mammal vertebrates, which cells carry out clotting?Read the answer and worked solution →
Worked practice questions
Which blood cells number in millions in every microlitre?
- White blood cells
- Blood platelets
- Red blood cells
- Lymph cells
Show answer and solution
Correct answer: C. Red blood cells
A microlitre holds 4.2 to 6.1 million red cells, far more than white cells or platelets.
Which of these is a waste product carried away by blood?
- Lactic acid
- Glucose
- Amino acids
- Fatty acids
Show answer and solution
Correct answer: A. Lactic acid
Blood removes waste products such as lactic acid, while the others are nutrients delivered to tissues.
How to practise
- Choose a Transportation in plants and animals question and try to work out your answer.
- Open the question to check the correct answer and read its worked solution.
- Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.
Put it into practice
Continue with Transportation in plants and animals practice for Olympiad (Class 7). Read explanations as you go. No signup form needed to start.
Practise Transportation in plants and animals →