Locomotion and Movement — BIOLOGY STD 11 Science — Question

While teaching in a classroom, teacher told students that cockroaches are omnipresent and they are useful as well as harmful for mankind. Ram found this interesting and asked many questions regarding the topic to his teacher.

1. Which features enable the cockroaches to thrive in almost all places?
2. How is it useful to humans?
3. What are the negative impacts of its presence in our surroundings?
4. What values does the Ram possess as a student?

Explain the importance of C₄ cycle.

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?

Discuss briefly the role of nucleolus in the cells actively involved in protein synthesis.

Raju has recently joined the gym. The very first day, while doing exercise, he felt increased rate of respiration, heartbeat, sweating, etc. He got worried as he experienced the sudden changes in his body. He discussed it with his brother who is a biology student. His brother smiled and explained him that these are the normal activities of the organs/ organ systems that occur during exercise for the maintenance of normal physiology of the human body.

1. Name the processes that are necessary for maintaining normal physiology of the human body.
2. Define coordination and integration.
3. Explain the functions of various organs of the by body that are coordinated and integrated during exercise.
4. What values did Raju's brother possess?

How can we say that artificial pacemaker is a life saving instrument?

Write any three advantages of scientific names.

Write the differences between: Systole and Diastole.

With the help of proper diagram describe various regions of root.

Explain with examples the categories determined on the basis of nitrogenous excreting substances.