Biological Classification — BIOLOGY STD 11 Science — Question

The diagram shows a section of cell membrane. Identify the components labelled A-F.

Make a simple diagram of a flowering plant and show/ label its different parts.

Plants have no respiratory system. Give three reasons as to how plants can get along without respiratory organs?

Write the name of three parasitic protozoans.

Describe the structure of contractile proteins.

Mention the ploidy of the following:
i. Protonemal cell of a moss
ii. Primary endosperm nucleus in dicot
iii. Leaf cell of a moss
iv. Prothallus cell of a fern
v. Gemma cell in Marchantia
vi. Meristem cell of monocot
vii. Ovum of a liverwort
viii. Zygote of a fern

Give the location of hepatic caecae in a cockroach. What is their function?

Give a description of the appendicular skeleton in human.

You have heard about several insectivorous plants that feed on insects. Nepenthes or the pitcher plant is one such example, which usually grows in shallow water or in marsh lands. What part of the plant is modified into a ‘pitcher’? How does this modification help the plant for food even though it can photosynthesize like any other green plant?

Angiosperms are the most advanced among plants and show more variety than any other division of plants. Additionally, most of the useful plants for us belong to the division angiosperm. Which of the following lessons can be taken from this? What are the benefits of learning multiple skills in our life?

1. A diverse group of students is always good for academic learning.
2. If a student knows multiple skills, then he is more likely to become relevant for the society.
3. A student with better physical features is likely to be a better student.