PART - 2 - Unit V : CH - 16 Excretory Products and Their Elimination — BIOLOGY STD 11 Science — Question

Name the categories of plant hormones concerned with each of the following and describe one other function of each of the three categories of plant hormones.

1. Inhibition of seed germination.
2. Promote flowering.
3. Cell division promoting activity.

Name any six secretions from exocrine glands.

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?

1. Describe the main components of blood.
2. Differentiate between adipose tissue and blood tissue.

The major parts of the human neural system is depicted below. Fill in the empty boxes with appropriate words.

This is a graph depicting growth curve of plant organ:

1. Name the growth curve.
2. What do 'A' and 'B' depict?
3. Write the mathematical expression for phase 'A' of this type of growth.

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?

Differentiate between eyes of cockroach and eyes of frog.

Describe at least three major functions of turgor pressure.

Class XI biology students attended a seminar where the speaker explained the students about the basic macromolecule found in the body, i.e., protein. He started with the monomer unit of protein and explained about different amino acids found. As amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon; they are also considered as substituted methane. Suddenly, Ajay stood up and asked about his queries based on the topic. The guest of seminar patiently explained him all the things. Ajay became satisfied and returned home happily from the seminar.

1. What are the four substituent groups in an amino acid?
2. Why are there so many different types of amino acids?
3. Give the general formula of a-amino acids.
4. Indicate the value of Ajay reflected from the above topic.