Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Why reproduction is necessary? Is it essential for survival? If a living organism does not reproduce, in which category it will belong, living or non-living? How is sexual reproduction different from asexual reproduction.

What are the characteristic features of Euglenoids?

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?

Give the name of the bones present in the lower leg in humans.

How does reabsorption take place in the excretory system in human?

Amrita's biology teacher taught in biology class that food helps in building the body and alsoprovides us energy to work. However, she was not able to understand the mechanisms involved.
So, she discussed it with his father who is a professor of biology in a college. He answered that in living organisms certain structures, present in the cells and known as power houses of cells, which are responsible for conversion of food into energy.
Read the above passage and answer the following questions.

1. Which cell organelles are known as power house of cell? Why?
2. List major components of mitochondrion.
3. What values are displayed by Amrita's father?

Draw a standard ECG and explain the different segments in it.

Each plant or group of plants has some phylogenetic significance in relation to evolution: Cycas, one of the few living members of gymnosperms is called as the ‘relic of past’. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement?

By looking at a plant externally can you tell whether a plant is C₃ or C₄? Why and how?

Write the difference between red and white muscles.