greenhouses and crops

Question 1

humid greenhouse?

Answer 1

decrease transpiration

Question 2

light greenhouse?

Answer 2

increase photosynthesis

Question 3

soil pH?

Answer 3

incorrect means enzymes denature

Question 4

CO2 in greenhouse?

Answer 4

increase photosynthesis

Question 5

temperature in greenhouse?

Answer 5

increase kinetic energy, increase photosynthesis

Question 6

what pesticide kills fungi?

Answer 6

fungi

Question 7

what pesticide kills weeds?

Answer 7

herbicides

Question 8

what pesticide kills insects?

Answer 8

insecticides

Question 9

advantages of pesticides

Answer 9

small time to work
kills everything
only needed once

Question 10

disadvantages of pesticides

Answer 10

expensive
pests can become resistant
can cause environmental damage
toxins can build up in food chain

Question 11

advantages of biological control

Answer 11

only needed to be introduced once
one initial cost
pest specific
pest will not become resistant
no effect on other animals

Question 12

disadvantages of biological control

Answer 12

takes time to reduce pests
doesn’t kill everything
expensive if needed to repopulate

Question 13

step 1 of yoghurt making

Answer 13

milk is pasteurised at 95 degrees to kill unwanted bacteria

Question 14

step 2 of yoghurt making

Answer 14

milk is homogenised to disperse fat globules

Question 15

step 3 of yoghurt making

Answer 15

cooled to 40 degrees so milk can be inoculated with lactobacillus without denaturing enzymes

Question 16

step 4 of yoghurt making

Answer 16

the culture is incubated at 40 degrees for several hours to allow the lactobacillus to digest milk proteins and ferment lactose to lactic acid

Question 17

step 5 of yoghurt making

Answer 17

yoghurt mix becomes thick because lactic acid causes pH to decrease making milk proteins coagulate

Question 18

step 6 of yoghurt making

Answer 18

yoghurt stirred and cooled to 6 degrees to a smooth consistency so fruit and flavorings can be added