5 How does smoking affect the development of babies in the womb? Read the following statements and identify the correct sequence of the four processes: (a) formation of gametes - implantation - intercourse - fertilisation (b) formation of gametes - intercourse - fertilisation - implantation (c) implantation - formation of gametes - intercourse - fertilisation (d) intercourse - fertilisation - formation of gametes - implantation (e) fertilisation - implantation - intercourse - formation of gametes 2 Explain each of the four processes mentioned in Question 21.2 . above.

8 Which of the following is a type of universal media? (A) MacConkey Agar. (B) Baird-Parker Agar. (C) \( \quad \) Mannitol Salt Agar. (D) Trypticase Soy Agar. 9

(B) State TWO ways in which flagellum helps a microorganism survive in an open environment. (2 ma All rights reserved. No part of this publication may be reproduced, stored in a retrieval sys transmitted in any form or by any means, electronic, mechanical, photocopying, reco otherwise, without the prior written permission of the Institute of Technical Education, Singapo Institute of Technical Education has made every effort to trace copyright holders, but if inadvertently overlooked any, we will be pleased to make the necessary arrangements a

(C) State TWO ways in which fermentation process helps to improve [2 marks] quality of food products.

Embroynic in character on the cell retain the ability to divide. These tissues present in mature plant are called meristematic Thoes plant tissues which

(A) State ONE example of selective media that can be used to isolate [3 marks] EACH of the following microorganisms. (i) Gram positive bacteria. (ii) Staphylococci spp. (iii) Gram negative bacteria.