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प्रश्न
Out of xylem and phloem, which one carries materials only upwards?
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उत्तर
Xylem carries materials only upwards.
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संबंधित प्रश्न
The breakdown of pyruvate to give carbon dioxide, water, and energy takes place in ______.
The exchange of respiratory gases in the cells of plants occurs by the process of _______________
(a) Osmosis
(b) Diffusion
(c) Glycolysis
(d) exhalation
Define breathing. State the differences between breathing and respiration.
When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of:
During the deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in:
Which of the following statements are correct?
(i) pyruvate can be converted into ethanol and carbon dioxide by yeast
(ii) fermentation takes place in the case of aerobic bacteria
(iii) fermentation takes place in mitochondria
(iv) fermentation is a form of anaerobic respiration
There are five animals P, Q, R, S and T. The animal P always lives in water and has gills for breathing. The animal Q can stay in water as well as on land and can breathe both, through moist skin and lungs. The animal R lives in soil and breathes only through its skin. The animal S lives on land and breathes through spiracles and tracheae. And animal T lives in water and breathes through its cell membrane.
(a) Which of the animals could be Amoeba?
(b) Which of the animals could be frog?
(c) Which animal could be fish?
(d) Which animal could be grasshopper?
(e) Which animal could be earthworm?
Veins and arteries carry blood. Which of these carry blood back to the heart?
Answer this question.
What are the holes on the sides of the body of insects called?
Choose the odd one out in the following groups of four items each:
Diffusion, Respiratory gases, Alveoli, Capillary network
Name the body structure concerned with the given functional activity:
Prevents food from entering the trachea during swallowing.
Why is respiration essential for life?
Name the organs that bring about respiration.
Complete the analogy.
Transport of CO2 by plasma : 7% :: Transport of CO2 by bicarbonate ions: ____________.
______ refers to the physical process by which gaseous exchange takes place between the atmosphere and the lungs.
Which is the correct sequence of air passage during inhalation?
On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.
Match the correct answers with the type of respiration and respiratory substances.
| Respiration | Types of Substrates |
| A. Floating respiration | I. Proteins |
| B. Cytoplasmic respiration | II. Glucose |
| C. Protoplasmic respiration | III. Carbohydrates and fats |
Visit a doctor. Find out about artificial respiration. Ask the doctor:
- When does a person need artificial respiration?
- Does the person need to be kept on artificial respiration temporarily or permanently?
- From where can the person get supply of oxygen for artificial respiration?
