Forum

The Living World

Try to collect all the currently accepted meanings for the word ‘species’.
Discuss with your teacher the meaning of species in case of higher
plants and animals on one hand, and bacteria on the other hand.

26/10/2024

Biology

11th (Science)

The Living World

Can you identify the correct sequence of taxonomical categories?
(a) Species-Order- Phylum -Kingdom
(b) Genus -Species- Order -Kingdom
(c) Species- Genus- Order- Phylum

26/10/2024

Biology

11th (Science)

The Living World

Define a taxon. Give some examples of taxa at different hierarchical
levels.

26/10/2024

Biology

11th (Science)

The Living World

Given below is the scientific name of Mango. Identify the correctly
written name.
Mangifera Indica
Mangifera indica

26/10/2024

Biology

11th (Science)

The Living World

What do we learn from identification of individuals and populations?

26/10/2024

Biology

11th (Science)

The Living World

What different criteria would you choose to classify people that you
meet often?

26/10/2024

Biology

11th (Science)

The Living World

Why are the classification systems changing every now and then?

26/10/2024

Biology

11th (Science)

Sets

Write the following as intervals :
(i) {x : x ∈ R, – 4 < x ≤ 6} (ii) {x : x ∈ R, – 12 < x < –10} (iii) {x : x ∈ R, 0 ≤ x < 7} (iv) {x : x ∈ R, 3 ≤ x ≤ 4}

26/10/2024

Mathematics

11th (Science)

Sets

Write down all the subsets of the following sets
(i) {a} (ii) {a, b} (iii) {1, 2, 3} (iv) φ

26/10/2024

Mathematics

11th (Science)

Sets

Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are incorrect and why?
(i) {3, 4} ⊂ A (ii) {3, 4} ∈ A (iii) {{3, 4}} ⊂ A
(iv) 1 ∈ A (v) 1 ⊂ A (vi) {1, 2, 5} ⊂ A
(vii) {1, 2, 5} ∈ A (viii) {1, 2, 3} ⊂ A (ix) φ ∈ A
(x) φ ⊂ A (xi) {φ} ⊂ A
4

26/10/2024

Mathematics

11th (Science)