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Questions in biology

[Free] If a woman is admitted to hospital for giving birth, which hormone is helping her in the delivery of her baby and releasing of milk? A. Vasopressin B. Aldosterone C. Progesterone D. Oxytocin

[Free] Living organisms can be divided into two main groups: plants and animals. The main difference between the two is that plants can make their own food using sunlight, but animals cannot. Which of the following can be put under the category of plants? A. only rose B. only grass C. only rose and grass D. all - banyan, rose, and grass

[Free] Match the following parts of a plant to their correct roles. | S.NO. | Column A | Column B | |---|---|---| | 1. | Leaf | a. take food to all parts of a plant | | 2. | Stem | b. collect water and minerals from the soil | | 3. | Root | c. has a baby plant inside it | | 4. | Flower | d. makes food | | 5. | Fruit | e. grows from a flower | | 6. | Seed | f. beautiful part of a plant that produces seeds or fruit |

[Free] C. State True or False. 1. Deforestation is one of the main causes of the loss of biodiversity. 2. Trees help in the percolation of water underground. 3. Today, only 20% of India is covered with forests. 4. The term fauna refers to all the plant life in a particular region or area. 5. Bandipur National Park, Karnataka is famous for Tiger. D. Answer the following questions in one or two words each. 1. Name two endangered species of animals. 2. What does IUCN stand for? 3. Which book categorizes different species into different threatened categories? 4. Write the names of two national parks located in India. 5. Where is Jim Corbett National Park located?

[Free] In this analogy of endocrine function, what is the key and what is the lock? A) Both the hormone and hormone receptors are locks. B) The hormone is the key, the hormone receptor is the lock. C) The hormone receptor is the key, the hormone is the lock.

[Free] F. Fill in the blanks. 1. The two main climatic factors that influence natural vegetation are ______ and ______. 2. In tropical regions, deserts are found at the ______ margins of continents, while deciduous forests are found at the ______ margins. 3. Lions and zebras are to the African savanna what ______ and ______ are to the North American prairies. 4. The ______ is a natural scavenger which is now endangered in India. 5. The full form of CITES is ______. 6. In India, ______ is celebrated to encourage the planting of trees. G. State whether the following statements are true or false. 1. Plants and animals are natural resources. 2. Severe and lasting changes in the environment may cause some plants and animals to become extinct. 3. Across regions, trees increase in height as the rainfall decreases. 4. The length of the growing season of a plant depends on the amount of rainfall. 5. A biome may consist of several ecosystems, both terrestrial and aquatic. 6. Some animals are bred in captivity to save them from extinction.

[Free] A. Identification: Directions: Fill in the blanks and choose the term inside the box with the correct term to complete the statements. Write your answers before the number. (15 items) Terms: Digestion, Liver, Ulcer, Villi, Amylase, Stomach, Esophagus, Absorption, Gallbladder, Pancreas, Mechanical digestion, Duodenum, Constipation, Peristalsis, Large Intestine 1. The process of breaking down food into smaller pieces. 2. A long, muscular tube that connects the mouth to the stomach. 3. The organ that produces bile. 4. Type of digestion that involves chewing and grinding. 5. The enzyme found in saliva that starts starch digestion. 6. Tube-like structure where water is absorbed and waste is formed. 7. The process of taking nutrients from digested food into the bloodstream. 8. A disease caused by acid attacking the stomach lining. 9. A muscular organ where food is mixed with gastric juices. 10. Finger-like projections in the small intestine for nutrient absorption. 11. Organ that stores bile. 12. Organ that secretes insulin and digestive enzymes. 13. The first part of the small intestine. 14. Digestive disorder caused by irregular bowel movements. 15. Involuntary wave-like muscle movements that push food forward. B. Multiple Choice: Directions: Choose the correct answer. Write only the letter of the correct answer. (8 items) 1. Which of the following best describes mechanical digestion? A. absorbs nutrients B. occurs only in the stomach C. physical breakdown like chewing D. involves enzymes breaking down food 2. Which part of the digestive system is responsible for most nutrient absorption? A. stomach B. esophagus C. small intestine D. large intestine 3. Which organ produces enzymes for digestion and regulates blood sugar? A. Gallbladder B. Pancreas C. Stomach D. Liver 4. What is the function of bile? A. Absorbs water B. Emulsifies fats C. Produces insulin D. Breaks down starch 5. Which digestive disease is often caused by a lack of fiber? A. Ulcer B. Diabetes C. Heartburn D. Constipation 6. Where does chemical digestion of carbohydrates begin? A. Liver B. Mouth C. Stomach D. Small intestine 7. Which is a preventive measure for food poisoning? A. Eating spoiled food B. Ignoring expiration dates C. Washing hands and food properly D. Not drinking water 8. Which organ secretes hydrochloric acid? A. Stomach B. Pancreas C. large intestine D. small intestine

[Free] To which of the following proteins in the thin filament of the skeletal muscle does calcium bind? a. troponin b. actin c. tropomyosin d. dystrophin e. myosin

[Free] Fill in the blanks: 1. ______ is the world of living things on the planet, which makes use of the environment around it. 2. The relationship between living and non-living things in the environment is called ______. 3. Green plants make their own food and are called as ______. 4. We cannot make our food and have to depend on plants and other animals, so we are called ______. 5. ______ substances are harmless to our environment because they can be transformed to a harmless natural state. 6. ______ is the process of making our environment unhealthy and dirty. 7. The unidirectional flow of energy in the form of food from one organism to another is called a ______. 8. ______ is a surrounding or a house of a particular plant or animal. 9. ______ and sewage should be protected to mix or flow with our natural water resources, to make ourselves survive happily. 10. There are biotic, ______ and cultural components of our environment.

[Free] An experiment was carried out to investigate the effect of gibberellic acid (GA) on the growth of dwarf pea plants. GA can be absorbed by leaves. Six identical pea plants were planted in pots containing 100 g of soil. The leaves of each plant were sprayed with equal volumes of water containing different masses of GA. The soil in each pot received 20 cm³ water each day and the plants were continuously exposed to equal light intensity from above. After seven days the stem height of each plant was measured and the percentage increase in stem heights calculated. The results of the experiment are shown in the table below. | Mass of GA applied (micrograms) | Percentage increase in stem height (%) | |---|---| | 0.01 | 90 | | 0.03 | 120 | | 0.05 | 160 | | 0.08 | 240 | | 0.10 | 320 | | 0.11 | 350 | 2.4.1 State a hypothesis for this investigation. 2.4.2 Identify TWO variables, not already mentioned, that should have been controlled to ensure the experimental procedure was valid. 2.4.3 How will an increase in the number of plants used in this investigation influence the results? 2.4.4 Explain the use of gibberellins in agriculture to improve fruit development.