The composition of ‘copper matte’ is, 

(1) Cu₂S + Cu₂O 

(2) Cu₂O + FeS 

(3) Cu₂S + FeS 

(4) Cu₂S + FeO

Identify the correct equation for Hardy-Weinberg law. 

(A) (p + q)² = 1 

(2) p + q = 1 

(3) (p – q)² =1 

(4) p – q = 1

Identify a micro-organism that can produces biomass of protein. 

(1) Methylophilus methylotrophus 

(2) Monoscus purpureus 

(3) Trichoderma polysporum 

(4) Aspergillus niger

In plants, lateral roots arise from 

(1) endodermis 

(2) epidermis 

(3) pericycle 

(4) hypodermis

The gene disorder phenylketonuria is an example for 

(1) Multiple allelism 

(2) Polygenic inhentance 

(3) Multiple factor 

(4) Pleiotropy

Match the plant structures given in the column-I with their plants given in the column-TI.

(1) A – q, B – s, C – r, D – p 

(2) A – r, B – p, C – s, D – q 

(3) A – q, B – s, C – p, D – r 

(4) A – s, B – r, C – p, D – q

Pick the hormone which is not secreted by human placenta. 

(1) Prolactin 

(2) hCG 

(3) Estrogen

(4) hPL

Amniocentesis is one of the methods 

(1) for foetal sex determination 

(2) adapted for MTP 

(3) used for safe parturition 

(4) of birth control

Snow blindness is caused due to 

(1) Acid rain 

(2) Ozone hole 

(3) Green house effect 

(4) Nuclear winter

If tan^-1(x² +y²) = α then dy/dx is equal to

(1) xy

(2) – xy

(3) -x/y

(4) x/y