Systematics of Living Organisms — Biology STD 11 Science — Question

Why do we shiver during winter?

After learning organization of cell, to test one of the postulates of cell theory, Ananya requested her teacher to guide and allow her to perform a small experiment. The aim of the experiment Avas to form new cells in the laboratory using isolated cellular organelles from other cells. Though Ananya did not succeed to form new cells, teacher-guided and motivated her explaining why experiment performed by them failed.
1. Which postulate Ananya was willing to test and why new cells failed to form from the isolated organelles from other cells?
2. From the above mentioned data could you guess which type of cells they were trying to form whether eukaryote or prokaryote?

1. Define binomial nomenclature system.
2. Who proposed it?
3. Why a unique name for a particular individual is essential in a multilingual country like India?

At Andaman, authorities do not allow tourists to collect shells from beaches. Why it must be so?

What is mesentron?

Effective filtration pressure was calculated to be 20 mm Hg; where glomerular hydrostatic pressure was 70 mm of Hg. Which other pressure is affecting the filtration process? How much is it?

Explain the following terms:Division/Phylum

Observe the blood report given below and diagnose the possible disorder.

Why are archaebacteria called extremophiles?

Observe the following reactions and explain in words