Question

I am giving 100 points so please answer properly......

1. We make our own food in the kitchen. This means that humans are also autotrophs. Do you agree? Give reasons.

2. Why can't animals make food from carbon dioxide, water and sunlight, like plants do?

3. The pitcher plant and Venus flytrap are green plants that can photosynthesize. Why do they need to feed on insects?

4. Plants do not have a digestive system like us. Why do they not need a digestive system?

Answer 1

1. We can not be considered as autotrophs as we are just modifying the food by cooking it.

2. Plants have pigment called chlorophyll which converts carbon dioxide , water and sunlight into food . Animals don;t have this pigment and hence can't make their own food.

3. Such plants generally grow in soil that has less quantity of nitrogen and hence has to take nitrogen from external sources like insect.

4. Digestive system is used to break complex food into simple particles that can be absorbed by body . Plant make their own food and these food is simple and hence don't need digestive system

Answer 2

1. we make our own food in the kitchen but where do we obtain the products from the answer is plant and some might say that way plant also obtain products but the major difference between the products we humans use and plants use is that material which plants use are not edible by them but the materials which we obtain can also be eaten without cooking so that's why we are classified as heterotrophic
2.Animals can't make food from CO2 , sunlight,water because we do not have chlorophyll to synthesized sunlight and we do not have the mechanism plants have in their body
3. pitcher plant go through the process of photosynthesis but still they eat plants because they are not able to fulfill their nutirents by the process of photosynthesis due to which they eat insects to fulfill their other needs( it's same like us when we start eating egg to fulfill protein deficiency)
4.They do not have a digestive system like us because the food they eat is already broken down into smaller units(glucose) so they do not need a digestive system because the food is already digested.


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