PART - 1 - Unit III : CH - 10 Cell Cycle and Cell Division — BIOLOGY STD 11 Science — Question

What is tidal volume? Find out the tidal volume for a healthy human in an hour time? Also, label the parts .4 B, C end D in the given figure of alveolus.

Describe the pentose phosphate pathway.

Some varieties of wheat are known as spring wheat while others are called winter wheat. Former variety is sown, and planted in spring and is harvested by the end of the same season. However, winter varieties, if planted in spring, fail to flower or produce mature grains within a span of a flowering season. Explain, why?

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?

Fill up the blank spaces appropriately:

Phylum/ Class	Excretory Organ	Circulatory Organ	Respiratory Organ
Arthropoda	-	-	Lungs/ Gills/ Tracheal System
-	Nephridia	Closed	Skin/parapodia
-	Metanephridia	Open	-
Amphibia	-	Closed	Lung

Describe the important characteristics of Mammal class and make a labelled diagram of bat.

Write the difference between: Pectoral and Pelvic girdle

Describe the role played by protein pumps during active transport in plants.

Explain the mechanism of transport of oxygen and carbon dioxide by the blood.

1. Mention two functions of cnidoblasts.
2. Write any four differences between reptiles and mammals.