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
sashaice [31]
3 years ago
7

Evolutionary theory contends that genetic ___________ is necessary and beneficial for humanity when there is an environmental ch

ange.
Biology
1 answer:
Anni [7]3 years ago
8 0

Answer:

variation

Explanation:

Genetic variation is what makes us all unique as a result of subtle changes in our DNA.  The Theory of Evolution is a process in which organisms change over time as a result of adapting to their environment.  Charles Darwin came up with the term Survival of the fittest, in any environment plants and animals from the same species show natural variation in their physical characteristics, like neck lengths in giraffes.  Darwin suggested that the plants and animals best suited to the environment will survive and pass on their characteristics to their offspring. Over time, the characteristics of the surviving members of the species will become predominant.

Example: Peppered moth

In London in the 1800's, 98% of peppered moths had light colored bodies and only 2% were dark.  The light moths were the same color as the trees so they could easily hide from hungry birds and not get eaten.  The dark moths however were easy to see and were eaten.  Then came the factories and smoke of the industrial evolution and many trees turned black with soot and suddenly the dark moths were able to survive better as they now looked like the trees and the light colored moths were easier to spot and eat.  By 1895 the dark peppered moths made up 95% of the population and the light colored moths only 5%.  This is an example of natural selection, because of the gene that makes the moths dark, it allowed them to flourish when the environment changed, they adapted, reproduced and survived.

You might be interested in
PLS HELP! NEED THREE SENTENCES!
stellarik [79]

Answer:

The pain nerves in her hand go to the brain to notify it. The brain processes this information and decides to tell the hand to remove itself from the stove. Then, the brain sends this signal back to the hand to make it remove tself from the stove.

Explanation:

3 0
3 years ago
The stalk that connects the leaf to the stem
defon
The answer is petiole. Hope this helps!!!
4 0
3 years ago
In the food chain below, which is the producer?<br><br> grass<br> mouse<br> snake<br> hawk
ivolga24 [154]

Answer:

Grass

Explanation:

Grass is the producer in the given food chain.

Note : -

Grasses are green plants which synthesize food ( carbohydrate ) in presence of sun light in the process of photosynthesis. That's why grass is called producers.

4 0
2 years ago
Read 2 more answers
Los anelidos estan en peligro de extincion? Si estan en peligro ¿Por qué? cuales son sus amenzas
NISA [10]

Sus amenazas son su predador

4 0
3 years ago
A neuron receiving impulses from two or more different axons is experiencing _______.
777dan777 [17]
The answer to this is temporal summation
5 0
3 years ago
Read 2 more answers
Other questions:
  • How big are paramecium?
    6·2 answers
  • Look at your data tables. List the cubes in order from largest to smallest. Then list them again in order of the surface area-to
    9·2 answers
  • What type of molecule is represented by the model below?
    9·1 answer
  • What is the function of the item labeled “2” on the image provided below?
    14·1 answer
  • if the substance entering the cell was un higher concentration inside the cell than outside the cell,what type of transport woul
    10·1 answer
  • Organelles are normally found it?<br>​
    6·1 answer
  • Pls help i dont understand :( will give Brainliest + 25 points!!
    12·1 answer
  • A strand of DNA was unwound and analyzed. If the nitrogen bases of the strand were A-T-C-G-G-A, what was the sequence of nitroge
    11·1 answer
  • The batteries in pacemakers do not last forever and eventually need to be
    7·1 answer
  • Carbohydrates and fats both
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!