Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Explain the economic importance of algae.

Distinguish between Artificial System and Phylogenetic System.

What is erythropoiesis? Write the functions of erythrocytes and thrombocytes.

Explain, why a pair of homologous Doze chromosomes is genetically different, but a pair of sister chromatids is genetically identical before crossing over in meiosis.

Write a short note on fruit.

Mango and coconut are ‘drupe’ type of fruits. In mango fleshy mesocarp is edible. What is the edible part of coconut? What does milk of tender coconut represent?

Which features make mammals as the most successful and dominant animals?

How is secondary growth accomplished in dicot roots? Explain with the help of schematic diagrams.

What is limbic system composed of? Mention its functions.

Radha's father who is a diabetic patient does not avoid food items doctor has told him in diet. He also feels lazy to go for a walk. One day, his glucose level was checked by his doctor. The doctor advised him to take injections regularly, as he was not able to control his diabetes with diet and medication. He came home and while telling the things to Radha's mother, Radha (biology student) heard them and interrupted in between. She explained that, doctor has given insulin injections to control his blood glucose level. This may be discontinued, if he will take precautions in his daily routine.

1. Which endocrine gland and its part is involved in the secretion of inslin?
2. Why doctor preferred him to take insulin injections and what is the role of insulin in controlling level of glucose in blood?
3. What precaution he should take to protect himself from such disorder?
4. What are the values reflected from Radha's character as a biology student and a daughter?