Question

MULTIPLE CHOICE Question 4 Which of these objects is considered to be nonliving? A a decomposing animal B minerals in the soil C dead skin cells D a rotting tree

Answer 1

Q4) B. Minerals in soils are non living since needy are not a part of the organisms. They are present in the body to support the function.rotting tree was itself a plant which was living, skin is one of the 5 sensory organs of human beings and a decomposing animal was once again an organism.

Q12) B. Intraspecific relationship because every species has a different pattern and technique for schooling. Schooling is a method adapted by the fishes to travel in group. This not only protects them from the predators but it also increases their efficiency to swim longer distance by decreasing the offorts.

Q18) according to the 10% law, only 10% of energy which was being consumed is being transferred to the next lever. Therefore

Producers-> primary consumers 23457 * 10% = 2345.7 kCal

primary consumers-> secondary consumer 2345.7 * 10% = 234.5 kCal

secondary consumer -> tertiary consumer 234.5 * 10% = 23.4 kCal

Hence your answer is D

Q20) photosynthesis is the process in which the plants makes food(sugars) using the carbon dioxide and water in presence of sunlight in leaves. The by-product of this reaction is oxygen. This is a anabolic process

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.

respiration is the process in which the the sugar is broken down to simple substances to generate energy. The by-products of this process is ware and carbon dioxide. They use oxygen to break the sugar. This is a catabolic process.

oxygen + glucose ——> carbon dioxide + water + heat energy.

the oxygen and sugar generated during photosynthesis is used during respiration to produce energy for plants to carry on their functions needed for life.

i hope my explanation was helpful to you. If you’re satisfied with my answer then please give a thumbs up. Your review matters a lot