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
romanna [79]
3 years ago
11

Which statement is true about natural selection?

Biology
1 answer:
Alik [6]3 years ago
8 0

Answer:

I would say B

Explanation:

Because atural selection is the mechanism for how evolution occurs over time. Basically, natural selection says that individuals within a population of a species that have favorable adaptations for their environment will live long enough to reproduce and pass down those desirable traits to their offspring.

You might be interested in
What group of carbohydrates does glucose belong to ??
UNO [17]
Glucose belongs to Monosaccharides ....
8 0
3 years ago
The dominant allele H reduces the number of body bristles in fruit flies, giving rise to a hairless phenotype. In the homozygous
DerKrebs [107]

Answer:

a. 3:1 (normal bristles to hairless)

b. 2:1 (normal bristles to hairless)

Explanation:

a.  If H allele is present, the fly will be hairless. But H allele is lethal at homozygous condition, so all hairless flies will be heterozygous for H locus (Hh). S allele has no effect on bristle number, but in presence of H allele, S produces a "normal" phenotype and is also lethal at the homozygous condition. So genotypes and phenotypes will be like this:

- SSHH: No viable- Lethal

- SSHh: No viable-Lethal

- SShh: No viable-Lehtal

- SsHH: No viable-Lethal

- SsHh: Normal

- Sshh: Hairless

- ssHH: Normal

- ssHh: Normal

- sshh: Normal  

A cross between two normal flies carrying the two alleles (SsHh) will produce (according to the attached Punnett Square):

6 Normal (SsHh, ssHh, and sshh)

2 Hairless (Sshh)

Therefore, the ratio of flies with normal bristles to hairless individuals will be 3:1.

b. When the hairless progeny of the previous cross (Sshh) are crossed with one of the parental normal flies from part a (SsHh), it will be produced (according to the second Punnett Square):

8 Normal (SsHh, ssHh, and sshh)

4 Hairless (Sshh)

So, the ratio of flies with normal bristles to hairless individuals will be 2:1.

7 0
2 years ago
In what organisms does alcoholic fermentation take place?
Artist 52 [7]
C. yeast and some bacteria
7 0
3 years ago
Read 2 more answers
How many times will a red blood cell circulate the body in its lifetime?
Step2247 [10]
Around 250,000 times.
8 0
2 years ago
Read 2 more answers
This is the energy needed to drive photosynthesis. example: it is not needed for respiration.
weeeeeb [17]
Sunlight, Carbon dioxide, and water are needed for photosynthesis to occur.
8 0
3 years ago
Read 2 more answers
Other questions:
  • Give an example of how structure determines function for the skeletal system and for the endocrine system.
    12·1 answer
  • What is natural seletion
    7·2 answers
  • which of the following is true about imprinting? a. it is often used in the training of adult animals. b. it always involves the
    11·1 answer
  • Vertebrates have an endocrine system of glands that secrete _____.
    10·1 answer
  • Which statement correctly explains whether more ATP is found in muscle cells or bone cells?
    10·2 answers
  • In the protein synthesis STEM case, which of the following mutations/errors created
    10·1 answer
  • Crossbred plants are called hybrids.
    6·1 answer
  • The sun's inner core is the hottest part of the sun. (2 points)<br> True<br> False
    7·2 answers
  • Why don't all organisms look
    13·1 answer
  • Non-flowering plants are known as seedless plants​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!