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Andrew [12]
2 years ago
5

In 1939, the use of DDT (a powerful synthetic chemical) as an insecticide was discovered. The United States adopted its widespre

ad use, producing up to 100 million kilograms per year (200 million pounds per year). Twenty years later, severe side effects started to be reported as a result of DDT use. Which was an advantage of using DDT?
insect and pest populations decreased

birth defect rates increased

cancer rates increased

fertility rates decreased
Biology
2 answers:
olganol [36]2 years ago
7 0
The answer is <span>insect and pest populations decreased.
</span>

DDT (dichlorodiphenyltrichloroethane) was used as an insecticide which is a substance used to kill insects. That resulted in decrease in insect and pest populations. It is a persistent and non-degradable insecticide, but as well organic pollutant readily accumulated to soils and consequently affects organisms.
nordsb [41]2 years ago
7 0

Answer:

A. insect and pest populations decreased

Explanation:

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The process of natural selection occurs randomly in nature. true or false
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False in a sense because it is not random. It is just that some organisms have more advantageous characteristics than others. These genes are then passed on which makes the likelihood of the next generation surviving greater.
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3 years ago
Louis Pasteur said, "The role of the infinitely small in nature is infinitely large." Explain what he meant, using examples of t
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Answer:

HEALTH SECTOR(microorganisms have led to the most devastating diseases of man such as HIV VIRUS, HEPATITIS VIRUS, SALMONELLA TYPHI AND PARATYPHI SPPS)

INDUSTRY(microorganisms have led to masses losses due to contamination of foods like the GROWTH OF MOLDS)

ENVIRONMENT most contamination of the environment are caused by microorganisms.

Explanation:Louis Pasteur meant that with the microscopic nature of microorganisms they have been able to make great impact in the world.

IN THE HEALTH SECTOR Microorganisms have been the major cause of the diseases of human and animals world wide, diseases such as Hepatitis A,B,C Virus,Typhoid caused by Bacteria (Salmonella typhy and paratyphy spp) etc have been a cause of a huge number of death.

INDUSTRY

Microorganisms are major causes of loss in the industries leading to large scale contamination of food products, such as Fungi infestation on foods especially of plants origin. MICROORGANISMS ALSO HAVE BENEFITS IN THE INDUSTRY AS IT IS USED IN THE FERMENTATION OF FOOD PRODUCTS.

IN THE ENVIRONMENT

Microorganisms are the major cause of environmental hazards such as the contamination of water bodies, the air (THE HUMAN FLU VIRUS) etc ALL THESE MICROORGANISMS HAVE CAUSED MASSIVE DEATHS THE WORLD OVER.

5 0
2 years ago
Which describes the boundary where earthquake activity occurs along rift valleys ?
horsena [70]
The answer will be c.
8 0
2 years ago
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The outer hair cells respond to sound by slightly tilting and changing length. because of the consequence of this, the action of
serg [7]

Basilar membranes

In an active cochlea, basilar membranes vibrate more strongly than in a dead cochlea. because all of the outer hair cells slant significantly and alter in length in response to sound. In response to basilar membrane changes, outer hair cells swell and contract. The frequency tuning curve is impacted by damage to the outer hair cells.

<h3>What are the function of Basilar membranes?</h3>

The basilar membrane is the inner ear's primary mechanical component. Over its length, it has graded mass and stiffness characteristics, and its vibration patterns separate incoming sound into its component frequencies, which trigger various cochlear areas.

Impact do outer hair cells have on our hearing :

As a nonlinear amplifier that enables the cochlea to detect sounds with great sensitivity and accuracy, outer hair cells (OHCs) play a crucial role in hearing. These distortion products can be monitored as distortion-product otoacoustic emissions as a result of the nonlinear sound processing (DPOAEs)

To learn more about Basilar membranes visit:

brainly.com/question/28074500

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5 0
1 year ago
Which two processes cycle carbon directly between the atmosphere and biosphere?
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2 years ago
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