Light with an energy flux of 18W/cm² falls on a non-reflecting surface at normal incidence. The pressure exerted on the surface is:

1) 2N/m²
2) 2 × 10⁻⁴ N/m²
3) 6 N/m²
4) 6 × 10⁻⁴ N/m²

 Epistatic gene differes from dominant gene in

(1) epistatic gene is nonallelic

(2) epistatic gene never expresses itself independently

(3) epistatic and hypostatic genes are present at different loci

(4) all of these

Which of the following statement is correct ?

1) Ovules are not enclosed by ovary wall in gymnosperms
2) Selaginella is heterosporous, while Salvinia is homosporous
3) Horsetails are gymnosperms
4) Stems are usually unbranched in both Cycas and Cedrus

The position of a projectile launched from the origin at t=0  is given by  at t=2s If the projectile was launched at an angle θ from the horizontal, then θ is (take g=10m/s²).

1) tan ^-1 2 / 3    2) tan ^-1 3 / 2  3) tan ^-1 7 / 4  4) tan ^-1 4 / 5 

Which of the following diseases are caused by mosquitoes bite
1. Sleeping sickness / Malaria / dengue / flue
2. Malaria / dengue / yellow fever / filariasis
3. malaria / yellow fever / pneumonia / T.B.
4. malaria / dengue / yellow fever / sleeping sickness

For a given distance from a current element, the magnetic induction is maximum at an angle measured with respect to axis of the current. The angle is :

1) 3π /4
2) π / 4?
3) 2π
4) π / 2

A beam of monochromatic ligh first travels through glass of R.I. 1.5 and then through water (R.I. =4/3). If the difference in their wavelength in the two media is 40nm, then the wavelength of the monochromatic light in vacuum will be

1) 4000 Å
2) 4400 Å
3) 4800 Å
4) 5200 Å 

In Pisum sativum the number of contrasting characters observed by mendel are
 1) Three
 2) seven
 3) eight
 4) four

Cauda equina is
 1) Sympathetic nerve bundle
 2) Para sympathetic nerve bundle
 3) Spinal nerve bundle
 4) Sensory nerve bundle

The layer of cytoplasm forming the vacuole membrane is known as

(1) Cytoplasm

(2) Tonoplasm

(3) Nucleoplasm

(4) None of the above