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
astraxan [27]
3 years ago
7

The fruit fly Drosophila melanogaster has an allele that confers resistance to DDT and similar insecticides. Laboratory strains

of D. melanogaster have been established from flies collected in the wild in the 1930s (before the widespread use of insecticides) and the 1960s (after 20 years of DDT use). Lab strains established in the 1930s have no alleles for DDT resistance. In lab strains established in the 1960s, the frequency of the DDT-resistance allele is 37%. Which statement is correct?a. Alleles for DDT resistance arose by mutation during the period of DDT use because of selection for pesticide resistance.
b. The evolutionary fitness associated with the heritable trait of DDT resistance changed once DDT use became widespread.
c. Resistance to DDT evolved in some fruit flies in order to allow them to survive.
Biology
1 answer:
kotegsom [21]3 years ago
3 0

Answer:

Option B, The evolutionary fitness associated with the heritable trait of DDT resistance changed once DDT use became widespread.

Explanation:

As per Darwin’s theory, few traits are inherited from the parents and some are acquired from the environment. Offspring can inherit genetic traits such as skin color, height, weight, eye color etc. from parent but the traits which offspring adopt as a response to their interaction with environment is specific to the individual only and is passed on if only it mutate the genes and is not behavioral in nature.  

Resistance to DDT is not a behavioral adaptation to environment. Hence,  the gene responsible for developing resistance against DDT fruit fly Drosophila melanogaster evolved with the increased usage of DDT. Genes which help offspring to survive in the persisting environment are passed on by the parents. Thus, in 1960 several fruit fly Drosophila melanogaster species had DDT resistant gene.

Option B, is correct

You might be interested in
Rosa listed some advantages and disadvantages of using renewable resources. Which best describes Rosa’s error?A. Wind does not e
Lynna [10]

Answer: Rosa's errors were options

A: Wind does not easily produce a lot of electricity.

C: Geothermal energy causes a lot wind pollution.

Explanation:

Wind Energy is the use of wind (kinetic energy) to provide mechanical energy and electricity through wind turbines. The wind turbines in a Wind farm ( made up of several wind turbines connected together) are then connected to electric power transmission network to generate electricity to households and grids.

Electricity is measured in Mega Watts (MW); Rosa is wrong because wind energy amounts for a significant percentage of electricity used in some developed worlds and mostly the European Union (EU) at a recorded 270 Giga Watts (GW). It is estimated that by 2020, wind energy will produce 50 percent of energy used by the EU.

Geothermal energy is the thermal energy (temperature of matter) which is gotten from energy generated and stored in the earth. Geothermal energy comes from radioactive decay of materials and the formation of earth.

Rosa is wrong, because Geothermal energy is environmental friendly and does not cause significant pollution. It does not involve fuel to harness its energy which in turn leads to stable electricity prices.

6 0
3 years ago
Read 2 more answers
HELP I NEED URGENT HELP! THIS IS DUE IN 5 MINUTES
V125BC [204]
It’s a marine/ sea sponge it is a underwater invertebrate. It is classified as animal . Also Sea sponges do not have cell walls or chloroplast typical of plants, but contain animal cells.
7 0
3 years ago
Can someone please help me if this is correct
gogolik [260]

Answer:

b

Explanation:

5 0
3 years ago
As we discussed, plesiadapiforms were initially interpreted as being the first primates. They were then interpreted as being out
alina1380 [7]

Answer and Explanation:

Primates must have long, strong fingers capable of supporting their own body weight when they need to climb, the ability to climb trees and stereoscopic vision. These skills help primates not only to survive in the wild, but facilitate the obtaining of food, resistance to predators and reproduction, these characteristics being the most favorable to maintain the continuation of the active species and competitiveness among members of the species.

6 0
2 years ago
Describe conditions that may result in the clumped dispersion, uniform dispersion, and random dispersion of populations.
KIM [24]

Answer:

The dispersion pattern of the population depends on the type of the population and their distribution in the environment. Different types of dispersion are uniform, random and clumped.

The uniform dispersion occur when the population is evenly spaced out in the area. Random dispersion is independent of the other individuals and randomly spaced. Clumped dispersion is greatly influenced by the behavior and the resources. Population are present in small patches.

5 0
3 years ago
Read 2 more answers
Other questions:
  • How many different phenotypes can be produced by a pair of codominant alleles?
    10·1 answer
  • What does the principle of uniformitarianism state?
    7·1 answer
  • You obtained sequences of several long dna fragments with no sequence similarity to any known genomes. which sequence is the mos
    7·1 answer
  • Review
    5·1 answer
  • What two things should you put for each observation
    10·1 answer
  • Briefly depict how carbohydrates, fats, and proteins are digested and absorbed. Start with the events that occur in the mouth an
    6·2 answers
  • Question 4 Multiple Choice Worth 1 points)
    12·1 answer
  • Where do the thickest deposits of terrigenous sediment typically form?
    15·1 answer
  • How much stronger is an earthquake of magnitude 7, than an earthquake of magnitude 6?
    14·1 answer
  • Will choose brainliest!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!