Does minnow’s survivorship increase if the exposure to product X is reduced?
When product X concentration increases the mortality of minnow increases as well.
Does minnow’s survivorship increase if the exposure to product X is reduced?
- Method for testing hypothesis
Organize to have identical tanks 3 in number and they should be full of 20 minnows in each. 25% of the pesticide is put in one tank. In the second tank put 50% of the pesticide. Record after three months the number of minnows that died.
- Control
The control is the third tank because no pesticide is put into it.
iii. Dependent variable
Measure of minnow health. The measure of the health condition is the dependent variable.
2: (b) Describe experimental results that would lead you to reject your hypothesis in part (a) (i). (Be specific.)
The mortality of the minnows did not increase when the concentration of product X was increased. Don't use plagiarised sources.Get your custom essay just from $11/page
Question 3: (c) One strategy for dealing with agricultural pests is integrated pest management (IPM).
IPM
IPM involves a combination of physical, biological and chemical means for controlling pests and also reduces the rate at which pesticide is used because it acts as an alternative.
Other specific approaches to control pests
- Introducing parasites that can feed on the pests
- Practising crop rotation
- Adjusting the time of planting crops.
IPM benefit to the environment
It helps reduce soil erosion and also reduce the incidental killing of organisms not targeted like the birds’ bees and spiders.
Question 4: (d) Describe TWO agricultural practices, other than those involving pest control, that increase crop yields.
- Terracing of the slopes
- Contour ploughing
- Planting cover crops
- Apply fertilizers to the soil to improve the production
- Planting many crops at the same time (intercropping).