1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ket [755]
3 years ago
15

Distinguish between first-generation pesticides and second-generation pesticides used by people to combat pests, and give an exa

mple of each. Distinguish between broad-spectrum and narrow-spectrum pesticides.
Biology
1 answer:
Lady bird [3.3K]3 years ago
6 0

Answer:

No short answer.

Explanation:

First and second generation pesticides differ vastly in terms of their contents and effects.

First generation pesticides were used in early 20th century up until the 1940's and they consisted chemicals such as mercury and lead which were not biodegradable and they started adding up in the soil until it was not fertile anymore. Second generation pesticides were divided into three groups as chlorinated hydrocarbon, organophosphates or carbamates and consisted of chemicals that were less harmful for the soil and did not accumulate over time. Some examples to second generation pesticides can be DDT or dimethoate.

Broad spectrum and narrow spectrum pesticides have the difference of effective range between them. Narrow spectrum pesticides are designed to target a specific organism such as a specific plant or an insect whereas broad spectrum pesticides are applicable to a wider range of organisms and still have the same effect for each.

Chitin Inhibitors can be given as an example of narrow-spectrum pesticides and the second generation pesticides in the answer can be given as an example of broad-spectrum pesticides.

I hope this answer helps.

You might be interested in
IS THIS RIGHT PLEASE HELP also which is an example of an omnivore- 50 points !!
Aneli [31]

Answer:

Omnivores include bears,birds,dogs,raccoons,foxes,certain insects,and some humans

omnivores are animals or humans that eat both meat and vegetables

3 0
2 years ago
In galapagos finches, Darwin noted that beak size and shape seemed to reflect
Hatshy [7]

...that seemed to reflect the size of seeds the birds ate.

3 0
3 years ago
Some algae demonstrate the phenomenon of alternation of generations, in which a multicellular, diploid, spore-producing organism
Leto [7]

Answer:

Option c. Only the haploid organism may also reproduce asexually.

Explanation:

It is scientifically approved that algae and fungi are able to form true asexual spores. This process of spore formation involves mitosis and resultant spore is called mito-spore which develop into new offspring.

Reference: Smith, B. A., and DANIEL D. Burke. "Evidence for the presence of messenger ribonucleic acid in Allomyces macrogynus mitospores." Journal of bacteriology 138.2 (1979): 535-541.

3 0
3 years ago
Jessie was conditioned to blink using an air puff and a tone. the experimenter then presented only the tone until the blink resp
kondor19780726 [428]

This is referred to as: spontaneous recovery

Spontaneous recovery is a theory of learning and memory which involves unexpected and recurrence of a conditioned response after a period of reduced response or delay. Spontaneous recovery is associated with classical conditioning and operant conditioning. Extinction will happen quickly after a spontaneous recovery, if the conditioned and unconditioned stimulus is not connected.


6 0
2 years ago
Which change is an environment effect of farming?
olga2289 [7]

Answer:

b

Explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • The small pieces of rock plus plant and animal pieces are called?
    6·2 answers
  • Which term refers to a mathematical formula that correlates with body fat?
    14·1 answer
  • Which of the following is a feature of vitamin E?​ a. ​The vitamin functions as a hormone-like substance. b. ​The RDA is based o
    10·1 answer
  • Help! i’ll give brainliest
    5·2 answers
  • Leachate is a harmless solution that can be pumped out of a landfill.<br> True or False
    14·2 answers
  • What is produced from the splitting of water during the light dependent reactions?
    13·1 answer
  • Dna coils tightly during division and assembles into visible. True or False
    13·1 answer
  • Which of the following should be used to make a precise measurement of liquid volume
    12·2 answers
  • What enzyme do retroviruses carry to create more DNA?
    13·1 answer
  • Please help quick!! Asap in test!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!