Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Make a comparative account of the five kingdoms ole (in Whittaker's classification) on the following characters:

1. Cell wall
2. Body organisation.

Write short note on the following,
Hypertension.

Kritika's biology teacher explained the different phases of plant growth in her class. She taught that growth of plants takes place in three successive steps or phases from germination to maturation phase. Kritika reached home and asked her elder sister, a biology post-graduate student to clarify the phases in detail. Kritika's sister told her that she will explain the complete process with the help of experimentation. She took few seeds of pea and germinated them on a circular filter paper, soaked with water in a petri-dish. After two days of growth, she picked up a couple of seedlings with straight radicle and marked it from tip to base with the help of a waterproof ink and again placed the seedlings on moist filter paper to allow them to grow.

1. Mention different phases of growth in plants?
2. List the conditions required for growth.
3. What values are reflected from nature of Kritika's sister?

Give the cause for the Heart sounds.

The biology teacher asked the students to verify the Pavlov's experiment in dogs to establish the conditioned response (reflex). The class was divided into two groups. The teacher asked them to submit the reports. Group 2 did not repeat the experiment. The teacher praised group 1 and also gave another chance to group 2 students.

1. Which experiment was performed by students?
2. Explain the experiment in brief.
3. What is conditioned reflex?
4. What values did group 1 exhibit?

Ruchi's father was not well for last 8 days. He gave pale look in his eyes and skin all over the body, when she saw his father's degrading health became worried and took him to the doctor. The doctor did the medical check up and found that he was suffering from jaundice.

1. How is Jaundice cause?
2. Mention the functions of RBCs.
3. What values are shown by Ruchi towards her father?

What is the vascular tissue system? Draw a labelled diagram of the radial and conjoint open vascular bundle.

Why biologists do not favour common names? Discuss briefly.

It is always taught by our teachers and parents that we should not eat food or fruits without washing our hands as it contains thousands of germs and pathogens which we cannot see with our naked eyes.

1. What are germs?
2. What are the basic difference between the unicellular and multicellular organisms?
3. Name the instrument that allow us to study the unicellular organisms.
4. What values are taught by our teachers and parents?

Name the three basic tissue systems in the flowering plants. Give the tissue names under each system.