Which one of the following best compares the eye and a camera?

Which one of the following would NOT give rise to a systematic error in an experiment?

If U = {1, 2, 3, . . . 10 } and S = { 2, 4, 6, 8, 10 }, then S ' =

A girl whose weight is 250 N walks up a slope 40 m long onto a platform 3 m high. Her gain in gravitational potential energy is:

A loudspeaker emits a steady note.A girl sings a note which is of lower pitch but higher volume. The sound wave she is producing has:

All of the following are non-metals EXCEPT for:

The correct equation for photosynthesis is:

A species of mouse has 32 chromosomes in its muscle cells.What will be the numbers of chromosomes in the mouse′s skin cells and sperm cells?

In a simple reflex action:

75 g of freshly dug soil was placed in an oven at 105 ℃ for 24 hours. It was allowed to cool, then reweighed. If the final mass of the dry soil was 66 g, what was the % water content of the original soil sample?

In an airport, a system consisting of sensors, bar code readers and remote controls is MOST LIKELY used for __________.

The main metal in tin cans used to preserve food is:

A rectangular tank is 100 cm long, 30 cm wide and 12 cm deep. The volume of liquid it will hold is

Biological catalysts in yeast are called:

The halogens are found in:

Which conclusion can be drawn from the table?

g/dm³ are units of:

Seeds are dispersed from the parent plant:

When zinc metal is added to copper sulphate solution the products are copper and zinc sulphate solution, so the material that has been displaced must be: