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
babunello [35]
3 years ago
13

DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against

many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?A) All habitats should have received applications of DDT at about the same time.B) The frequency of DDT application should have been higher.C) None of the insect pests would have genetic variations that resulted in DDT resistance.D) DDT application should have been continual.
Biology
1 answer:
erastovalidia [21]3 years ago
6 0

Answer:

DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?

What would have prevented the evolution of DDT resistance in insect pests is the None of the insect pests would have genetic variations that resulted in DDT resistance.

Explanation:

You might be interested in
Avery and DNA (page 289)
Ivan

Yes, Avery, Mc Leod and Mc Carty do thought that genes may be involved in the transformation of non virulent rough Strains of <em>Diplococcus pneumoniae</em> to harmful smooth strained bacteria

<h3><u>Explanation:</u></h3>

Avery was a Canadian medical researcher who along with other two well known scientists of the contemporary time went for an experiment where he took two strains of bacteria Diplococcus pneumoniae - one is rough and nonvirulent and another is smooth and virulent. For a control run, he injected both the bacteria in separate mice and the expected result was there. Now as he injected heat killed smooth bacteria, the mice survived. But as he injected heat killed smooth bacteria with rough bacteria, although there was no organism which can kill the mice the mice died. And autopsy revealed the presence of live smooth bacteria in the lungs.

Thus they suspected something have gone from the dead smooth bacteria into the non virulent rough bacteria which lead to transformation of the rough bacteria to smooth ones. Thus, the experiment was carried on, which suspected role of genes in this transformation.

5 0
3 years ago
Compare the use of the siphon in clams and squid
inna [77]

Explanation:

  1. Siphons in Mollusca are tube-like structures in which water (or, more rarely, air) flows. The water flow is used for one or more purposes such as locomotion, feeding, respiration, and reproduction.
  2. The siphon propels the squid through the water in the opposite direction to which the siphon is pointing, much like jet propulsion. To use this jet propulsion, the squid takes in water through the large opening and then closes off the opening.

7 0
2 years ago
If you have a cell with more salt outside the cell, then inside the cell what will happen to the cell?
hodyreva [135]

Answer:

The cell would lose the water inside it causing it to die.

Explanation:

Water in cells moves towards the higher concentration of salt so if there is more on the outside the water would move on the outside causing it to die because it needs water. If it was the opposite and there was more salt inside more water would go inside causing the cell to swell and virtually exploding and diluting parts of our body.

5 0
3 years ago
Which of the following factors will have a greater impact on a population as the density of that population increases?
Karolina [17]
<span>the factor that will have the greater impact on a population is : D. Climate Climate will determine the overall environent condition in a specific region, which will eventually determine which organisms can survive there. For example, you wont find a tropical tree in a Desert</span>
5 0
3 years ago
The flexible nature of a cell membrane results from its _________
MrMuchimi
It results from the composition of the cell membrane. The cell membrane consists of a phospholipid bilayer, which have hydrophilic heads and hydrophobic tails. Hope this helps! :)
5 0
3 years ago
Read 2 more answers
Other questions:
  • 1. This region is totipotent, which means its cells can continuously divide and grow.
    9·1 answer
  • What offspring are expected from mating a roan bull and a roan cow?
    14·1 answer
  • Using the allele D to stand for a dominant sex-linked trait, show a cross with a woman who does not have a dominant sex-linked d
    6·1 answer
  • When Paige first enters a dark movie theater, she cannot see well. As her eyes adjust to the darkness, Paige is able to spot an
    13·1 answer
  • What directly controls what enters and exits a cell?
    15·2 answers
  • What are winds that blow in a certain direction most of the time and can produce surface currents called?
    11·1 answer
  • A plant has alleles for white, red, and blue flowers. The majority of the flowers are white, though the color
    11·1 answer
  • 5. In a food web, what is the role of detritivores and decomposers and at what level do
    10·1 answer
  • Question 3 of 10
    7·1 answer
  • NO LINKS AND NO FAKE ANSWERS. What is made in the thermosphere?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!