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Neko [114]
3 years ago
7

Which statement about ddt best shows how science has been impacted by society? ddt led to insect resistance. ddt was considered

harmful and was replaced by other pesticides. ddt was the first modern insecticide. ddt was used in wwii to control malaria and typhus.
Biology
2 answers:
Andreyy893 years ago
8 0

Answer:

(B) DDT was considered harmful and was replaced by other pesticides.

Explanation:

DDT (Dichlorodiphenyltrichloroethane) is a chemical used to kill pests or other insects. It is also responsible for controlling malaria during World War II, as mentioned in (D). To date, it is still considered as the most effective pest control to control insects carrying the malaria disease.  

Its controversy was reported when Rachel Carson’s Silent Spring book was released, detailing how the wildlife has been damaged due to environmental impact stemming from the use of DDT. It was found that DDT was responsible for the decline of bird of preys (falcon, eagles) in the United States due to its effects on their eggs.  

We can say from here that (B) was the right answer since due to widespread perception of its toxicity, DDT was banned from use in many countries, despite disagreements from the scientific community who believes that the hysteria over DDT was mostly unfounded.  

qwelly [4]3 years ago
3 0

Answer:

<h2><em>(B) DDT was considered harmful and was replaced by other pesticides. </em></h2>

Explanation:

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The current system used for naming organisms was developed by who?
Alja [10]
Carolus Linnæus

<span> Taxonomy, responsible for many scientific classifications and influences in various field of life sciences or biology.  Evidences that Taxonomy uses to group or categorizes species range from </span><span><span>
1.       </span>"Fossil Records</span> <span><span>
2.       </span>Comparative anatomy</span> <span><span>
3.       </span>Comparative embryology</span> 
4.       Biochemical information <span><span>
5.       </span>Cellular structure</span> <span><span>
6.       </span>Behavior</span>" 
<span>We also suggest that taxonomy has played various roles mainly in many aspects in Zoology, Botany, Anatomy and Physiology –aspects that include animal and human structures and functions. As the biotic community is so diverse it is classified to Biodiversity and the existence of properly assorting by set standard.<span> </span></span>

7 0
3 years ago
Which of the following is NOT a solution to protect the water in the two wells in danger of becoming contaminated?
Anton [14]

Answer:

The correct option is C. Building a well between the two wells that goes deeper into the earth would not stop the water from being polluted .

Explanation:

Even if a well was constructed between the wells B and C, it wouldn't have stopped the contamination of the water. As the oil would still be leaking and it would contaminate the wells.

All of the other options can be used to stop the contamination.

Option A suggests building an impermeable membrane that would stop the oil flow. Hence, the water in the wells will not be contaminated.

Option B suggests not using the water from the wells and using an alternate water supply. The alternate water supply wouldn't be contaminated with oil.

Option D suggests chemically purifying the contaminated water. This can be an effective technique to clean the contaminated water.  

7 0
3 years ago
what is the relationship between exposing to a virus and developing immunity to it? cite evidence from the text to support your
den301095 [7]

Answer:

Exposure to a virus is closely related to the development of immunity, since the immune system is responsible for creating antibodies in response to the presence of potentially harmful biological agents, such as these viruses.

Explanation:

Viruses are biological agents that can produce diseases when they enter the body of a living being.<u> In response to contact with a virus, the</u><u> immune system</u><u> synthesizes specific </u><u>antibodies</u> to combat the foreign biological agent.

Antibody immunity can be of two types. It is fast when it is mediated by immunoglobulins M (IgM), which attack the virus anywhere, while the late and prolonged response is due to the development of immunoglobulins G (IgG).

An example of immunity to a virus occurs with the exhibition to the virus of the Dengue, that creates permanent immunity to the viral serotype to which an individual is exposed.

The acquired immunity, mediated by antibodies, is the base for the development of vaccines.

8 0
3 years ago
A. Do mammals such as humans have a cloaca?
blagie [28]

Most adult placental mammals have no remaining trace of the cloaca. Being placental animals, humans only have an embryonic cloaca, which is split up into separate tracts during the development of the urinary and reproductive organs.

8 0
3 years ago
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seraphim [82]

Answer:

Direct and indirect sunlight is the main cause for the 4 different seasons

Explanation:

4 0
3 years ago
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