Differentiate between an annual and a biennial plant. Provide one example of each.

How does the application of cyanobacteria help improve agriculture output?

In a flowering plant a microspore mother cell produce four male gametophytes while a megaspore mother cell form only one female gametophyte. Explain.

A criminal blew himself up in a local market when was chased by cops. His face was beyond recognition. Suggest and describe a modern technique that can help establish his identity.

A group of youth were having a ‘rave party’ in an isolated area and was raided by police. Packets of ‘smack’ and syringes with needles were found littered around.

(a) Why is taking ‘smack’ considered an abuse?

(b) Write the chemical name of ‘smack’ and the name of its source plant.

(c) Syringes and needles used by the youth for taking the drug could prove to be very fatal. Why?