7.3 List any TWO advantages of genetically modified crops. 7.4 Mention TWO disadvantages of genetically modified crops. 7.5 In a paragraph of eight to ten lines, discuss the advantages and disadvantages of using science and technology to increase food production. Include examples in your answer.

3. Which of the ff. is a producer? \( \begin{array}{ll}\text { a. fish } \quad \text { b. shrimp } \quad \text { c. algae } \quad \text { d. crab }\end{array} \) \( \begin{array}{l}\text { 4.All the organisms below are decomposers except } \\ \text { a. fungi } \quad \text { c. bacteria } \\ \text { b. sea lion } \quad \text { d. fungi and bacteria } \\ \text { 5. Arrange the feeding relationship of the ff. organisms living in } \\ \text { intertidal zone }\end{array} \) Fish ------seaweeds------shore birds

23 Which of the following statements is TRUE about the methylene blue reduction test (MBRT) conducted for pasteurised milk samples? \( \begin{array}{ll}\text { (A) } \quad \text { Microbial load of milk samples can be determined quantitatively. } \\ \text { (B) } \quad \text { Decolourization of methylene blue is caused by the loss of electrons. } \\ \text { (C) A UV-Vis spectrophotometer is required to monitor the colour change. } \\ \text { (D) } \quad \text { Milk sample with longer reduction time is of better quality than sample with } \\ \text { shorter reduction time. }\end{array} \) CC)

1.1.6 The main purpose of an engine's air filter is that it ... A controls the engine's air intake volume B reduces the engine's air intake noise. C prevents air from entering combustion chamber D prevents dust and other foreign matter from entering the engine

Suppose there are 30 bacteria in a Petri dish at start time. Seven hours later, there are 360 bacteria in the dish. 1.) Express the number of bacteria, P, as a function of \( t \) hours passed. Note: Round the growth rate to 4 dec. places. \( P(t)= \) 2.) Use the model from part a to determine the number of bacteria, rounded to a whole number, in the dish after 20 hours:

Choose the most suitable answer. IMark Mushrooms and mould belong to the group of living things called fungi. How are they similar? P They cannot make their own food. Q They reproduce from spores. R They can only be seen with a microscope.