Question

1)Differentiate between aerobic and anaerobic
Respiration.
2)explain the structure of heart with neat and
labelled diagram
3)state the cause of ozone depletion
4)Howe ozone for formed.
5)Define Photosynthesis
6)explain the digestion of food with neat and
labelled diagram
7)Explain the following terms with examples
(i) phototropism
(ii) Geotropism
(iii)Hydrotropism
(iv) thigmotropism
8) give an example of food chain
9)what is 10%law of energy transfer in tropic levels


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Answer 1

Answer:

1 . Aerobic respiration is a set of metabolic reactions that take place in the presence of oxygen, occurring in a cell to convert chemical energy into ATPs. Anaerobic respiration is a process of cellular respiration where the high energy electron acceptor is neither oxygen nor pyruvate derivatives.

2.the human heart is divided into four chambers . the upper two chambers are called right and left atrium. and the lower two chambers are called the right and left ventricle. the left atrium receives the oxygenated blood from the lungs via the pulmonary vein.

3. Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere (see details below). ... CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity.

4. Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere. In the first step, solar ultraviolet radiation breaks apart one oxygen molecule (O2) to produce two oxygen atoms (2 O) (see Figure Q2-1).

5. the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.

8. The 10% Rule means that when energy is passed in an ecosystem from one trophic level to the next, only ten percent of the energy will be passed on. A trophic level is the position of an organism in a food chain or energy pyramid.

Answer 2

Answer:

1) aerobic is done in the presence of air or oxygen.... but anaerobic respiration is done in the absence of air or oxygen

5) the process through which green plants make their food with the help of Co2 and H2o and sunlight in the presence of chlorophyll is known as photosynthesis

8) grass→grasshopper→frog→snake→eagle

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