7. Answer the following in details:
a. Are all plants autotrophs? Justify your answers with examples.
b. How are the leaves of pitcher plant modified to catch insects?
c. How do fungi and algae benefit from each other? What is this relationship called?
d. What is the role of stomach in the digestive process?
e. how does digested food get absorbed ?
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Answers
Explanation:
1 Most of the plants are autotrophs and they produce their own food. But some plants such as pitcher plant and venus fly trap plant are parasitic in nature.
2Pitcher plants are several different carnivorous plants which have modified leaves known as pitfall traps—a prey-trapping mechanism featuring a deep cavity filled with digestive liquid. ... The plants attract and drown their prey with nectar.
3Fungi and algae share their food among each other. The algae or the cyanobacteria benefit their fungal partner by producing organic carbon compounds through photosynthesis. And the relationship is called symbiotic relationship.
4 Stomach. The stomach is a hollow organ, or "container," that holds food while it is being mixed with stomach enzymes. These enzymes continue the process of breaking down food into a usable form. Cells in the lining of the stomach secrete a strong acid and powerful enzymes that are responsible for the breakdown process.
A) Most of the plants are autotrophs and they produce their own food. But some plants such as pitcher plant and venus fly trap plant are parasitic in nature.
B) Pitcher plant is an insectivorous plant that derives nitrogenous compounds by trapping and consuming insects. The leaf of a pitcher plant is modified to form a pitcher-like structure. When an insect sits on the pitcher, the lid of the pitcher gets closed and the insect gets trapped inside. The insect is then digested by the enzymes secreted by the plant. In this manner, pitcher plants fulfil their requirement of nitrogen by feeding on insects.
C) Fungi and algae share their food among each other. The algae or the cyanobacteria benefit their fungal partner by producing organic carbon compounds through photosynthesis. And the relationship is called symbiotic relationship.
D) The stomach is a hollow organ, or "container," that holds food while it is being mixed with stomach enzymes. These enzymes continue the process of breaking down food into a usable form. Cells in the lining of the stomach secrete a strong acid and powerful enzymes that are responsible for the breakdown process.
E) The digested food is absorbed into the blood in the human body by the small intestine. The digested food passes through the walls of the small intestine and then into our bloodstream. Here the digested food is broken down into vitamins, minerals, proteins, carbohydrates and fats. These all nutrients are reached to different cells and tissues by means of blood.