Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Name the type of joint between the following:-

1. atlas/axis
2. carpal/metacarpal of thumb
3. between phalanges
4. femur/acetabulum
5. between cranial bones
6. between pubic bones in the pelvic girdle

The cells of a unicellular organism are usually spherical whereas those of multicellular tend to be many-sided. Why?

Define RQ. What is its value for fats?

Differentiate between neurons and neuroglia.

The essential functions of roots are anchorage and absorption of water and minerals in the terrestrial plant. What functions are associated with the roots of aquatic plants. How are roots of aquatic plants and terrestrial plants different?

Differentiate between: Respiration and Combustion

A person had roti and dal for his lunch. Trace the changes in those during its passage through the alimentary canal.

Draw illustrations to bring out the anatomical difference between: Monocot stem and Dicot stem.

Teacher was teaching the mechanism of absorption of water in plants or any other solid particles. Akhil when reached home, saw that his mother was complaining his father about the difficulty in closing doors during rainy season. Akhil explained his parents that it is due to the phenomenon of imbibition.

1. What do you understand by the term imbibition?
2. Imbibition is different from the process of osmosis. Comment.
3. What values do you learn from the Akhil's behaviour?

A typical angiosperm flower consists of four floral parts. Give the names of the floral parts and their arrangements sequentially.