Answer the following question.
a) List out the main life characteristics of living things.
b) Define food. Why do we need it?
c) Define nutrition. Name the major modes of nutrition.
d) Differentiate between autotrophic and heterotrophic nutrition.
e) Define photosynthesis. With the help of a diagram, explain the process of
photosynthesis.
f) Can association between rhizobium and root nodules of leguminous plants be
termed as a symbiotic association? If yes, how? If not, why/
g) List the general conditions necessary for photosynthesis.
h) Can symbiotic plants, if separated live independently?
i) How is host different from a parasite?
j) How do stomata help to trap carbon dioxide from the air? Explain with the help
of a diagram.
k) Write the short notes on
i. Parasitic plants.
ii. Insectivorous plants.
l) How do saprophytic plants differ from symbiotic plants?
m) Explain how a symbiotic bacteria is helpful to a farmer?
n) What are the ways by which the nutrients content of the soil can be replenished?
o) Can we call heterotrophic plants as carnivorous plant as well?
p) Differentiate between bladderwort and pitcher plant?
Answers
Nutrition is the science that interprets the nutrients and other substances in food in relation to maintenance, growth, reproduction, health and disease of an organism. It includes food intake, absorption, assimilation, biosynthesis, catabolism and excretion.[1]
The diet of an organism is what it eats, which is largely determined by the availability and palatability of foods. For humans, a healthy diet includes preparation of food and storage methods that preserve nutrients from oxidation, heat or leaching, and that reduces risk of foodborne illnesses. The seven major classes of human nutrients are carbohydrates, fats, fiber, minerals, proteins, vitamins, and water. Nutrients can be grouped as either macronutrients or micronutrients (needed in small quantities).
In humans, an unhealthy diet can cause deficiency-related diseases such as blindness, anemia, scurvy, preterm birth, stillbirth and cretinism,[2] or nutrient excess health-threatening conditions such as obesity[3][4] and metabolic syndrome;[5] and such common chronic systemic diseases as cardiovascular disease,[6] diabetes,[7][8] and osteoporosis.[9][10][11] Undernutrition can lead to wasting in acute cases, and the stunting of marasmus in chronic cases of malnutrition.