PART - 1 - Unit I : CH - 3 Plant Kingdom — BIOLOGY STD 11 Science — Question

Differentiate between myelinated and non-myelinated axons.

Bring out the differences between plant cells and animal cells.

Manish while performing a practical in laboratory on Grams stain observed that one type of bacteria stained dark blue or purple in colour, while the other type of bacteria did not retain the crystal violet dye even after staining again and again. Instead it keeps on loosing the dye on washing. He rushed to his teacher for showing the specimen.His teacher explained that there is nothing to get worried about. As different kinds ofbacteria are found.

1. What is the basis of classifying bacteria.
2. What is the basic difference between Gram positive and Gram negative bacteria.
3. Name one Gram positive and one Gram negative bacteria.
4. What values are shown by Manish's teacher?

Lichen is usually cited as an example of ‘symbiosis’ in plants where an algal and a fungal species live together for their mutual benefit. Which of the following will happen if algal and fungal partners are separated from each other?

1. Both will survive and grow normally and independent from each other.
2. Both will die.
3. Algal component will survive while the fungal component will die.
4. Fungal component will survive while algal partner will die.

Based on your answer how do you justify this association as symbiosis.

Place the following animals in their respective taxonomic categories.

1. Housefly.
2. Mango.
3. Man.

Explain the process of digestion in the buccal cavity with a note on the arrangement of teeth.

Comment on the statement - Meiosis enables the conservation of specific chromosome number of each species even though the process per se, results in reduction of chromosome number.

Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.

Describe cilia and flagella of eukaryotic cell. How are flagella of eukaryotes different from those of prokaryotic cell?

Describe the structure of dicotyledon seed by drawing a diagram.