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Naya [18.7K]
4 years ago
12

An increase in pesticide use has resulted in a decrease in the local blue jay population. What is the BEST explanation for the d

ecreased blue jay population? A) Blue jay food supply increased. B) Blue jay food supply decreased. C) Many blue jays moved into the area. D) Infection with the pesticide destroyed most of the blue jay population.
Biology
2 answers:
max2010maxim [7]4 years ago
8 0
B would be the right answer

Dovator [93]4 years ago
7 0

The right answer is B) Blue jay food supply decreased.

Blue Jay feed mainly on plants, such as wild fruits, acorns, hazelnuts, beechnuts, corn and other cereals, and all kinds of insects. They can thus contribute largely to the fight against the caterpillar.

The increase in insecticides will deprive them of one of these food sources that are insects. which causes a decrease in their food supplies.

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3 years ago
The incidence of skin cancer has increased dramatically in parts of Australia where people are experiencing greater UV exposure
Marina86 [1]

Answer:

The correct answers are:

1. stratospheric ozone depletion

2. climate change

3. desertification/land degradation

4. freshwater decline

5. biodiversity loss.

Explanation:

1) Stratospheric ozone depletion- ozone layer is the protective layer around the earth that protects us from harmful rays such as UV rays coming from the sun. There are depletions or holes in the ozone layer in some parts of Australia and therefore, therefore leading to skin cancer.

2) climatic change - The change in the average temperature or precipitation of an area that takes place due to global warming that changes the earth's climate is changing rapidly.

3) desertification or land degradation - It occurs due to past overuse of fertilizer or barren land that has zero crop yield.

4 )freshwater decline - freshwater is an essential part of the irrigation of crops in agriculture and due to the downfall of groundwater its decline the freshwater produce in these parts.

5) biodiversity loss - Coral reefs are habitats for many aquatic organisms and used as various ways of biodiversity. If there is a loss or decrease in their numbers it will affect and decline the biodiversity of the area.

7 0
3 years ago
PLS HELP!
lilavasa [31]

Answer:

evolution of life on Earth

Explanation:

Life began on Earth at least 3.5 to 4 billion years ago, and it has been evolving ever since. At first, all living things on Earth were simple, single-celled organisms. Much later, the first multicellular organisms evolved, and after that, Earth's biodiversity greatly increased.

7 0
3 years ago
Whats the oceans climate
igor_vitrenko [27]
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8 0
3 years ago
In natural selection what must be true of traits that are passed down through generationsal selection where do the alleles or tr
goblinko [34]
I'm not sure if I will answer the question you asked, as I many have interpreted it incorrectly. In natural selection, there must be variance in the gene pool, the total frequency of alleles in a population. Now, one of the organisms may have a gene that somehow helps them survive from the selective force much better compared to the others. If this does happen, over time the gene pool will narrow down to become just the genes of that organism that survived better in the first place because the rest would be taken care of by the selective force. So, the alleles and trait come from the first organisms that had the advantage over the others of its species.
3 0
3 years ago
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