Animal Kingdom — BIOLOGY STD 11 Science — Question

What are inclusion bodies? Name the four types of them.

Ammonia is added to soil in two ways by microbes involved in nitrogen cycle. Name and define them.

How many parathyroid glands does a human being have? Where are they located? Name the hormone secreted by them.

The respiratory centre located in the medulla oblongata of a human brain got damaged. How will this affect the control of breathing? Explain.

How does cambium ring form in a dicot stem?

Kavita (student of class VIII) returned from the school and started counting her teeth. She felt surprised and counted her teeth two more times, but each time she count, she found her teeth to be 28 in number. Then, she started counting his younger brother (student of class I) teeth and found them to 20 in number. She rushed to his father who was a dentist and told him, that her teacher taught her that human beings have 32 teeths. But she has only 28 and his brother has 20. Her father explained that number of teeth are related to the age of a child and also told her about diphyodont and heterodont dentition.

1. How is number of teeth related to the age of a child?
2. At what age, a person gets 32 teeth?
3. What do you understand by heterodont and diphyodont?
4. What values are reflected from Kavita's behaviour?

Explain some natural means of overcoming seed dormancy.

Differentiate between oxyhaemoglobin and carbaminohaemoglobin.

Who developed the staining procedure to stain the bacterial cells? Mention the two categories of bacteria based on that and differentiate between them.

Illustrate the movement of water in leaves.