Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Differentiate between ureotelism and ammonotelism.

Describe three reasons for the generation of a proton gradient between the lumen of thylakoids and the stroma of chloroplasts.

Diatoms are also called as ‘pearls of ocean’, why? What is diatomaceous earth?

What are SA and AV nodes? What are their functions?

Compare the following: Central neural system (CNS) and Peripheral neural system (PNS)

Why is conduction in a nerve called on the electric phenomenon?

Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green ? Why?

Mention the characteristics of meristematic phase, elongation phase and maturation phase of plant growth.

Analyse the events during every stage of cell cycle and notice how the following two parameters change. Number of chromosomes (N) per cell.

Angiosperms are the most advanced among plants and show more variety than any other division of plants. Additionally, most of the useful plants for us belong to the division angiosperm. Which of the following lessons can be taken from this? What are the benefits of learning multiple skills in our life?

1. A diverse group of students is always good for academic learning.
2. If a student knows multiple skills, then he is more likely to become relevant for the society.
3. A student with better physical features is likely to be a better student.