Transport in Plants — BIOLOGY STD 11 Science — Question

What is the general structure of Bryophytes?

When a substrate is being metabolized, why does not all the energy that released in one step. It is released in multiple steps.What is the advantage of step-wise release?

Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem? Give reasons.

Double fertilisation is an unique event to angiosperms. Explain the event and its possible significance.

1. Draw a labelled diagram of the basic body plan of chordates.
2. Mention the four characteristic features which all chordates possess.

During summer vacation, Nitin was studying inside the home. He said to his mother that he is feeling hot inside. His mother advised him to sit under a tree in the garden to beat the heat. He was surprised after listening to his mother's opinion as temperature was much high outside than inside. He still went out and started studying under the tree. After few hours, he came to his mother and asked about it. His sister who was a biology student of class XI heard their conversation and told his brother that it is all due to the phenomenon of transpiration.

1. What is transpiration? Also indicate the transpiring organ of the plant.
2. What are the general factors that affect transpiration?
3. Name different types of transpiration.
4. What values are displayed by Nitin's sister's character?

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?

Ankita prepared hard for the test at home. All text based question and one practical based question on lock and key hypothesis was given to check whether the students had understood the phenomenon or not. Ankita who was a topper of class was the only student who was able to solve the problem. All others were unable to attempt the same. Teacher felt happy and asked Ankita to explain the process in the class.

1. Who proposed the lock and key hypothesis?
2. What is the nature of enzyme action?
3. Why are enzymes also called biocatalyst?
4. What values are reflected from Ankita's character?
5. The hypothesis was given by Emil Fischer in 1894.

What are SA and AV nodes? What are their functions?

How will you define life as a biologist? What features make you different from non-living things?