TNPSC Biology Objective Questions and Answers - 1

Question: 1

The initial point where the energy enters into the ecosystem is

(A) Water

(B) The Sun

(C) Green plants

(D) The soil

Question: 2

Which of the following is not a part of the biotic environment?

(A) Air

(B) Man

(C) Insects

(D) Trees

Question: 3

Dehydration is a symptom of

(A) Anthrax

(B) Cholera

(C) Tuberculosis

(D) Leprosy

Question: 4

The disease, affecting the retina of the eye, that is considered to be hereditary is

(A) Hepatitis

(B) Retinoblastoma

(C) Skin cancer

(D) Leukaemia

Question: 5

What is responsible for the secondary growth of the plants?

(A) Cuticle

(B) Phloem

(C) Xylem

(D) Cambium