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
amm1812
3 years ago
13

describe how natural selection can sometimes lead to persistence of harmful or even lethal allele include exampple

Biology
1 answer:
balu736 [363]3 years ago
8 0

Answer:

<em>Look below.</em>

Explanation:

This question may have made it seem like natural selection is a harmful process -- be wary of this. To understand this, you have to note something known as heterozygote advantage. All this means is that the heterozygotes, the organism that expresses both the dominant and recessive alleles, rather than the homozygotes, organisms that express both dominant or both recessive alleles, have an advantage. An example is with sickle cell disease. People heterozygous for the sickle cell trait are more resistant to malaria for some reason, whereas the homozygotes are not. Because heterozygotes (which have a harmful allele and normal allele) have the advantage, natural selection selects for this trait and favors it. This leads to the "persistence of harmful or even lethal allele[s]." Again, just because the organism has a lethal allele isn't necessary always a bad thing. :)

You might be interested in
HELP PLEASE IM GONNA DIE IF I DONT PASS
astra-53 [7]

Answer:

you would see rivers and mountains.

pine peak is the highest point because there are more circles surrounding it and its also named.

it is flowing away from the ocean because fresh water fish have to swim UP river to spawn in the ocean.

i think its 20 but im not sure

Explanation:

i hope this helps :)

4 0
3 years ago
6 different between mango and lotus
wariber [46]

Answer:

Mango tree: ... They are also grown mostly for the mango fruit production as the mango production achieved Mangifera is their genus name . They have relatively large leaves and can grow up to the height of 40 meter. Rose plant : They are the plants which means they are relatively small and has the weak stem.

8 0
3 years ago
Some bacterial cells are resistant to a variety of antimicrobials because they actively pump the drugs out of the cell.
ad-work [718]

True. Some bacterial cells are resistant to a variety of antimicrobials because they actively pump the drugs out of the cell.

A significant resistance mechanism in Gram-negative bacteria is drug efflux. It expel solutes from the cell. Antimicrobials and metabolites are just a few of the hazardous compounds that Efflux pumps help bacteria remove from their interior environments so they can regulate it.

The main efflux systems in Gram-negative bacteria are members of the RND superfamily and typically consist of an outer membrane protein channel, a periplasmic protein, and a cytoplasmic membrane pump. The most common example is  MFS (such as Bmr and Blt in Bacillus subtilis) and the ABC transporters.

Learn more about antimicrobials here:

brainly.com/question/13052094

#SPJ4

4 0
2 years ago
What molecules do both dna and rna contain
podryga [215]
DNA and RNA are both made up of monomers called nucleotides. They also both have three nitrogenous bases: Adenine, Cytosine, Guanine.
8 0
3 years ago
Read 2 more answers
Which structures inside the cell put proteins together? A. Centrosomes B. Golgi bodies C. Organelles D. Ribosomes
siniylev [52]
Answer is D Ribosomes
8 0
3 years ago
Read 2 more answers
Other questions:
  • Two heterozygous white (brown fur is recessive) rabbits are crossed
    15·1 answer
  • Which of earth’s layer is a liquid
    8·2 answers
  • Which process is responsible for the growth and repair of human tissue
    7·1 answer
  • Describe the effects that enzymes can have on substrates amoeba sisters
    15·1 answer
  • Why is U-235 the most common nuclear fuel instead of the more abundant U-238? State a clear topic sentence and support it with e
    12·1 answer
  • You exhale about .0800 liters of CO2 (carbon dioxide) gas in a single breath. 22.4 liters of CO2 contain 6.022 x 1023 molecules.
    7·1 answer
  • MAKING BRAINLIEST, THANKS AND FIVE STARS TO CORRECT ANSWER! PLZ AND THANK YOU! HAVE A GREAT DAY! :D
    10·1 answer
  • What comes first egg or chicken. please answer ASAP
    9·2 answers
  • Write the definition for the word Proliferation IN YOUR OWN WORDS.
    13·2 answers
  • What is the best way to deal with biodiversity hotspots?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!