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
Fofino [41]
3 years ago
7

Which factors can prevent permanent fixation of an allele (i.e. maintain genetic diversity)? Hint: You're going to have to try d

ifferent values than just those presented in the exercise--try to keep both alleles present! a. Gene Flow b. Genetic Drift c. Natural Selection d. Mutation
Biology
1 answer:
aleksandr82 [10.1K]3 years ago
3 0

Answer:

Option D

Explanation:

Mutations are changes that occur in the DNA sequences as a result of environmental factors like exposure to some certain chemicals or radiation that can be passed down to the offspring and this increases genetic variations which can prevent permanent fixation of an allele.

You might be interested in
A capsule stain is described as a negative stain because the capsule itself __________. does not take up stain has a negative ch
KonstantinChe [14]

Answer:

Does not take up the stain.

Explanation:

Negative staining refers to the process wherein the unstained specimen is visualized under the darkly stained background.

One of the examples is capsule staining wherein the capsulated cells are stained with India ink or nigrosin dyes. The particles of these dyes stain the background blue-black but cannot enter the capsule.

Hence, the light-colored capsulated cells are visualized in the midst of the blue-black background.

6 0
3 years ago
How do amphibians breathe on land and in water​
gizmo_the_mogwai [7]

Answer:

Most amphibians can breathe both through cutaneous respiration (through their skin) and buccal pumping - though some also retain gills as adults. Some aquatic salamanders (and all tadpoles) have gills and can breathe underwater thanks to them. The Mexican axolotl, for example, never loses its gills.

7 0
2 years ago
Saltwater fish constantly drink water but still excrete concentrated urine to compensate for the water loss. They also have gill
Dmitrij [34]

Answer:

The above paragraphs describes that how salt- and fresh-water fish regulates their osmoregulation. Hence, the correct answer would be c. have adapted to deal with osmosis.

Osmosis is the process by which solvent's molecule move from region of low concentration (hypo-tonic) to the region of high concentration (hyper-tonic) through a semi-permeable membrane.

In sea-water fishes, the body fluids are hypo-tonic to the surrounding water and thus water is kept moving out of their gills. In order to prevent the excess water loss they need to drink water constantly and excrete concentrated urine.

In contrast, fresh-water fishes body fluids are hyper-tonic to surrounding water and hence, water keeps entering in their body through gills. So, in order to prevent excess dilution they absorb salt from surrounding with the help of gills and also their bodies reabsorb salt from urine.

3 0
3 years ago
Read 2 more answers
In the analysis step of the scientific method, what is analyzed?
Vlad1618 [11]
The answer is C. The Experiment!!!!!
6 0
3 years ago
Read 2 more answers
How is the dispersive model different from the semiconservative model of DNA replication?
iogann1982 [59]

Answer:

It it not, In the dispersive model, one of the two resulting double helices is made of two old strands, and in the semiconservative model the other is made of two new strands.

6 0
3 years ago
Other questions:
  • I am a relatively fast-acting chemical messenger that affects mood, hunger, sleep, and arousal. what am i?
    8·1 answer
  • Show the possible genotypes and phenotypes of the offspring from a cross between a heterozygous male with type A blood and a het
    6·1 answer
  • When biologists use keys to systematically separate groups of organisms based on couplets, or pairs of characteristics, what is
    13·1 answer
  • Help please!........................................................
    5·1 answer
  • What layer forms the largest portion of the earth
    14·1 answer
  • 6. What is An organism like a green plant that can make its own food
    8·1 answer
  • I don’t understand this
    5·1 answer
  • 1. What is the name for the process in which DNA→RNA
    8·1 answer
  • What are some plans that can benifit Kelley's Island State Park?
    15·2 answers
  • Abus
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!