Locomotion and Movement — BIOLOGY STD 11 Science — Question

During biology class, the teacher was explaining the characteristics of living things. Abhay became confused after knowing, that all the characteristics of human beings are similar to other animals. He asked his teacher about any characteristic that is exclusively found only in human beings. The teacher smiled appreciated Abhay for his attentiveness and explained him about it.

1. What is the characteristic exclusively found in humans?
2. What are the characteristics of living things?
3. Why viruses are not considered as living?
4. What values are shown by Abhay?

Would a defoliated plant respond to photoperiodic cycle? Why?

Write any four differences between inhalation and respiration.

An abnormal type of secondary growth is called anomalous secondary growth.

1. In which plants it occur?
2. How does it occur?

Describe in detail the structure of a nephron.

Define the term inflorescence. Explain the basis for the different types inflorescence in flowering plants.

Which hormones are secreted by the posterior pituitary gland? What function does each serve? Where are these hormones actually produced? How are these hormones transported to the region from where they are released?

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?

Who was the first to attempt a more scientific basis for classification of living organisms? How did he classify plants and animals?

In a given habitat we have 20 plant species and 20 animal species. Should we call this as ‘diversity’ or ‘biodiversity’? Justify your answer.