PART - 1 - Unit II : CH - 5 Morphology of Flowering Plants — BIOLOGY STD 11 Science — Question

Differentiate between Apoplast and Symplast pathways of water movement. Which of these would need active transport?

Does pyruvic acid enter the 'Krebs' cycle directly?

Kritika's biology teacher explained the different phases of plant growth in her class. She taught that growth of plants takes place in three successive steps or phases from germination to maturation phase. Kritika reached home and asked her elder sister, a biology post-graduate student to clarify the phases in detail. Kritika's sister told her that she will explain the complete process with the help of experimentation. She took few seeds of pea and germinated them on a circular filter paper, soaked with water in a petri-dish. After two days of growth, she picked up a couple of seedlings with straight radicle and marked it from tip to base with the help of a waterproof ink and again placed the seedlings on moist filter paper to allow them to grow.

1. Mention different phases of growth in plants?
2. List the conditions required for growth.
3. What values are reflected from nature of Kritika's sister?

Explain the importance of photosynthesis

Prakhar, a class XI student went out after rains in the garden. He saw earthworms on the ground and wondered how they are able to move, eat and perform various function of life Next day, he went to his biology teacher and asked her about the same. Her biology teacher politely explained him about how different animals have various levels of organisation of cells. She also told her that except sponges and coelenterates, all the animals of the kingdom-Animalia have organ- system level of organisation.

1. What kind of body organisation are present in sponges and coelenterates?
2. Write about the organisation type in lower animals, like protozoans.
3. In which phylums organ system level organisation is found?
4. What values are shown by Prakhar?

At a stage of their cycle, ascomycetes fungi produce the fruiting bodies like apothecium, perithecium or cleistothecium. How are these three types of fruiting bodies different from each other?

Describe the structure of the rib cage of the human.

1. Name the cranial meninges that cover the brain.
2. Write down one function of cerebellum and cerebrum each.

Describe the structure of Brain.