Question

D. Answer the following in brief.
1. What is meant by symbiotic relationship?
2. How do vessels help the roots of plants?
3. Write the equation for the process of photosynthesis.
4. Why some plants have red leaves or leaves with yellow patches?
5. Explain holozoic nutrition with examples.
E. Answer the following.
1. Why cuscuta is called a parasite?
2. How does Venus fly trap plant catch an insect ?
3. Differentiate between saprophytic and parasitic type of nutrition.
4. Leaves are food factory of the plant.Explain.
5. Euglena is both an autotroph and a heterotroph in nutrition.How?

Answer 1

Answer:

3 ans The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

1 ans : the living together of two dissimilar organisms in more or less intimate association or close union. 2 : the intimate living together of two dissimilar organisms in a mutually beneficial relationship especially : mutualism.

Answer 2

D.1 : the living together of two dissimilar organisms in more or less intimate association or close union. 2 : the intimate living together of two dissimilar organisms in a mutually beneficial relationship especially : mutualism

2. It is through two kinds of elements of xylem tissue called, xylem vessels and tracheid that water and minerals move from roots of a plant to its leaves. ... Xylem vessels have pits in their cell walls where lignin is not deposited.

3. The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2.

4. During spring and summer when there is plenty of sunlight, plants make a lot of chlorophyll. In autumn when it starts to get cold, some plants stop making chlorophyll. ... As chlorophyll goes away, other pigments start to show their colors. This is why leaves turn yellow or red in fall.

5. Holozoic nutrition (Greek: holo-whole ; zoikos-of animals) is a type of heterotrophic nutrition that is characterized by the internalization (ingestion) and internal processing of gaseous, liquids or solid food particles. ... Ingestion: In animals, this is merely taking food in through the mouth.

E. 1. The Cuscuta plant is called a parasite because it has no chlorophyll and absorbs food material from the host. In this process, the host is deprived of its valuable nutrients.

2. To attract flies or other prey, the Venus flytrap secretes nectar on to its open traps. Insects smell the sweet nectar and once they land on the leaves, they trip the trigger hairs on the outside of the traps. This causes the cells in the leaves to expand. In less than a second, the leaves shut.

3.A mode of nutrition in which organisms obtain nutrition from dead and decaying matters is called the Saprotrophic Nutrition. Parasitic Nutrition refers to heterotrophic nutrition, in which parasites depend on other living organisms for their food.

4. The leaf is called the food factory of the plant because it makes food by the process of photosynthesis with the help of raw materials like water and carbon-dioxide using sunlight and chlorophyll.

5.of sunlight i.e autotrophic, when deprived of sunlight they behave like heterotrophs by predating on other smaller organisms. Hence Euglena is autotrophic and heterotrophic both is a true statement.

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