Nutrition in Animals: Class 7 Science Q&A · Page 2
32 free answers on Nutrition in Animals (Science) for Class 7 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- ScienceClass 7CBSE
Read carefully the terms given below. Which of the following set is the correct combination of organs that do not carry out any digestive functions? (a) Oesophagus, Large Intestine, Rectum (b) Buccal cavity, Oesophagus, Rectum (c) Buccal cavity, Oesophagus, Large Intestine (d) Small Intestine, Large Intestine, Rectum
Soln: The answer is (a) Oesophagus, Large Intestine, Rectum Explanation: Oesophagus pushes the food downwards, and it is not involved in any digestive functions. The large intestine absorbs water and some salts from the undigested food material, and it is not involved in the digestion process. In the rectum, the remaining waste passes and remains there as semi-solid faeces. It is not involved in any digestive function.<
- ScienceClass 7CBSE
Which of the following pair of teeth differ in structure but are similar in function? (a) canines and incisors. (b) molars and premolars. (c) incisors and molars. (d) premolars and canines.
Soln: The answer is (b) molars and premolars. Explanation: Our teeth tear and grind the food before swallowing food. There are four types of teeth. Incisors: front eight teeth, 4 in the upper jaw and 4 in the lower jaw. Canines: There are 4 canines, one on each side of each jaw. Premolars: There are 8 premolars. Two premolars in each of the upper
- ScienceClass 7CBSE
Given below from (i) to (iv) are some food items. Boiled and mashed potato Glucose solution A slice of bread Mustard oil Which of the above will give a blue-black colour when tested with iodine? (a) (i) and (ii) (b) (i) and (iii) (c) (ii) and (iii) (d) (iii) and (iv)
Soln: The answer is (b) (i) and (iii) Explanation: Mashed potato and bread are rich in starch. On adding iodine, it reacts with starch to give a blue-black colour.
- ScienceClass 7All
What is the difference between autotrophs and heterotrophs?
Autotrophs and heterotrophs are two primary categories of organisms based on their modes of obtaining energy and nutrients. Here are five key differences between autotrophs and heterotrophs: Energy Source: Autotrophs: Produce their own food by converting inorganic substances into organic compounds through processes like photosynthesis or chemosynthesis. They use sunlight or inorganic compounds as a direct source of energy to synthesize their own nutrients. Heterotrophs
- ScienceClass 7All
How much protein in 1 egg?
The amount of protein in an egg can vary slightly depending on the size of the egg, but a typical large egg (about 50 grams) contains approximately 6 grams of protein. This protein is found in both the egg white (albumen) and the egg yolk, although the majority of the protein is in the egg white. Keep in mind that the nutritional content of eggs can vary, so it's always a good practice to check the specific nutritional information provided on the packaging or consult a reliable source for the
- ScienceClass 7All
How does an amoeba obtain its food?
Amoebas are single-celled organisms that obtain their food through a process called phagocytosis. Phagocytosis is a form of endocytosis where the cell engulfs solid particles by wrapping its cell membrane around them and forming a vesicle or vacuole. Here's how amoebas obtain their food: Locating Food: Amoebas are typically found in aquatic environments, such as ponds and streams. They move by extending and contracting their pseudopodia, which are temporary extensions of their cell membrane.
- ScienceClass 7All
How do plants get nutrients?
Plants obtain nutrients from their environment through a process known as nutrient uptake. They require a variety of essential nutrients to grow, develop, and carry out their metabolic processes. Here's an overview of how plants get nutrients: Soil: Most plants acquire the majority of their nutrients from the soil. The essential nutrients in soil include macronutrients (nitrogen, phosphorus, potassium) and micronutrients (iron, zinc, copper, etc.). These nutrients are present in the form of i
- ScienceClass 7All
What is eye flu?
"Eye flu" is a colloquial term commonly used to refer to a viral eye infection, specifically conjunctivitis. Conjunctivitis is an inflammation of the conjunctiva, which is the thin, clear tissue that covers the white part of the eye and lines the inside of the eyelid. This condition is also sometimes called "pink eye" due to the characteristic red or pink coloration of the eyes. Causes of conjunctivitis (eye flu) include: Viral Infections: Most cases of
- ScienceClass 7All
What is roughage?
Roughage, also known as dietary fiber or bulk, refers to the indigestible portion of plant-based foods that remains largely unchanged through the digestive process. It includes components such as cellulose, hemicellulose, pectin, and lignin, which are structural parts of plant cell walls. While the human digestive system cannot break down and absorb these components, they play a crucial role in maintaining digestive health and have several benefits. Key points about roughage include: 1. Indig
- ScienceClass 7All
What is heterotrophic nutrition?
Heterotrophic nutrition is a mode of nutrition in which organisms obtain their organic food molecules by consuming other organisms or organic substances produced by other organisms. Heterotrophic organisms cannot produce their own organic compounds, such as sugars and amino acids, through processes like photosynthesis or chemosynthesis. Instead, they rely on external sources to meet their nutritional needs. Here are some key characteristics and examples of heterotrophic nutrition:
- ScienceClass 7All
Ingestion of solid food occurs in which type of nutrition?
Ingestion of solid food particles occurs in holozoic nutrition (also called heterotrophic nutrition). This feeding method involves: Ingestion: Taking in solid or liquid food Digestion: Breaking down complex food molecules into simpler, absorbable forms Absorption: Taking up digested nutrients into cells Assimilation: Using absorbed nutrients for energy and growth</
- ScienceClass 7All
What are the two main ways oxygen is consumed and carbon dioxide is produced?
The two primary processes that consume oxygen and produce carbon dioxide are cellular respiration and combustion. Cellular respiration is a biological process occurring in living organisms, where cells break down glucose and other organic molecules using oxygen to release energy, producing CO₂ and water as byproducts. This process is essential for life, providing the energy needed for all cellular activities. Combustion, or burning, is a chemical reaction whe