The diagram shows some of the stages of how a length of DNA can be removed from one organism and introduced into another organism. Which row is correct? Answer: 4)…

A straight line passes through the points P ( 3,− 3) and Q (6, 9). Which one of the following is an equation of a straight line which is parallel…

A student carries out an experiment to determine the density of the material from which two identical solid objects are made. She uses a balance and a measuring cylinder containing…

Element X has the electronic structure 2, 8, 3.Which of the following statements about this element are correct?1 The element is in Group 12, Period 3 of the Periodic Table.2…

The diagram shows a kidney and its associated vessels from a healthy individual. Which row correctly identifies the vessels along with the concentration of urea they contain. Answer: 1) D…

Consider the following three statements:1 A mass of 4.0 kg requires a resultant force of 5.0 N to act on it in order toaccelerate it at 1.25 m / s…

The equation for the complete combustion of methane is:CH4(g) + 2O2(g) CO2 (g) +2H2O (g)If 1.60 g of methane were completely burned in 8.00 g of oxygen (an excess) to…

The sex of a species of fruit fly is determined by the number of X chromosomes relative to the number of non-sex chromosomes (A) in a cell. This is called…

Simplify:2x + 3     +      2x – 3 -2 2x – 3             2x + 3 Answer: 24) D Let us first solve the first…

A car is being driven at 20 m / s when the driver sees a child run into the road. The driver’s usual reaction time is 0.70 s, but this…