Answer:
The forestry department is using a<u> 1. </u><em><u>chemical method</u></em><u>.</u> This involves using a 2. <em><u>foliar spray</u></em> method, in which department personnel will spray directly on trees' leaves.
Explanation:
- White pine blister is a fungal disease of plant caused by fungus <em>Cronartium ribicola.</em>
- This fungus infects the plant through the stomata of the leaves.
- There are several methods of controlling pests and pathogen in agriculture which include ; mechanical methods; chemical methods and Biological methods.
- Mechanical methods include constructing barriers, electrical fencing etc.
- The biological method include introduction of organisms that will suppress pathogen activity.
- Chemical methods include use of pesticides , that are poisonous chemical substance that will kill the pathogen.
- Here the forestry department decides to spray insecticides thus, they are using a chemical method.
- Secondly they are going to spray the insecticide on each leaf so they have chosen the method of foliar spray and not the cut stump treatment or basal bark method.
The answer would be A. When supply exceeds demand
This is because there is plenty supply for the forest without animals dying from things such as, lack of food.
When demand exceeds supply it throws an ecosystem off because some animals aren't getting the food they need and therefor dying. So that eliminates answers C. and D.
When supply and demand are both 0 that means that there are no animals to demand and there are no supplies for demand leaving no sustainable ecosystem.
Answer:
Insects, such as water striders, and spiders, such as fisher spiders, can glide or scamper across the surface of water. These critters are small enough that their weight can be supported almost entirely by surface tension, the relatively weak forces that hold water molecules together.Explanation:Insects, such as water striders, and spiders, such as fisher spiders, can glide or scamper across the surface of water. These critters are small enough that their weight can be supported almost entirely by surface tension, the relatively weak forces that hold water molecules together.
Answer:
- E. Does photosynthesis performed by elodea remove CO2 from the water?
- F. Does cellular respiration occur at a higher rate than photosynthesis in the tube with only elodea?
Explanation:
The tubes were placed under a growth light and as the elodea is growing, it would need photosynthesis to provide food. The color changes will therefore allow the students to see the effect photosynthesis has on the CO2 in the water by checking to see if the BTB turns blue which would mean that CO2 was removed by photosynthesis.
The students will also be able to see which process occurs faster in the tube with only elodea because the dominant color would show if cellular respiration occurs faster than photosynthesis or if the case is the reverse. For instance, if respiration is occurring faster, there will be more CO2 which would turn the BTB towards yellow, if photosynthesis is faster the BTB will turn towards blue and if the rates are similar, the BTB will remain green.