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
SOVA2 [1]
3 years ago
7

Cichlids, a type of fish, were introduced to a lake around 200 years ago. Over the years, the fish have developed into two disti

nct groups. One group stays in the main lake and the other group resides in the streams that flow into it. Both groups of cichlids breed in the same streams at the same time of year. However, the groups are splitting into two genetically and physically different types of fishes. How would you classify this type of speciation
Biology
1 answer:
alina1380 [7]3 years ago
7 0

Answer:

sympatric speciation

Explanation:  

Different sympatric species have the same closest ancestor and live in the same area but inhabiting different niches.

The steps for sympatric speciation are:

  1. An ancestral species inhabit a geographic area.
  2. With time, different populations of the same species occupy different niches or microhabitats in this general area.
  3. As the microhabitats are different, they have different environmental pressures that are acting on each population.
  4. These pressures lead to the origin of differences between groups, which need to adapt to each environment
  5. Each population suffers genetic changes due to environmental conditions. These changes are inheritable.
  6. With time, these differences drive to the final complete divergence of populations, becoming different species and reproductively isolated.

In sympatric speciation, the interruption of genetic flow must be fast, and there must be differences in niches so no species can compete and displace the other species. <em>Speciation occurs in the same distribution area of the original species</em>. The new species originate in a place with no physical barriers but different environmental pressures.

In the exposed example,

  • <em>The introduced Cichlid fishes 200 years ago</em> → Original species and the common ancestor between the new derivated species
  • <em>The lake</em> → general geographic area
  • <em>The main lake and the streams</em> → Microhabitats or niches with different pressures each
  • <em>The groups are splitting into two genetically and physically different types of fishes. They do not mate. There is no genetic flow between groups.</em> → Speciation process.
You might be interested in
List five factors or behaviors that affect cholesterol levels in the body, how these factors affect cholesterol levels, and whet
anyanavicka [17]
Hey there,
Q1 & Q2) 
1) Heredity- Genes carry genetic information for cholesterol. So, it can be passed down from your parents.
2) Diet- Cholesterol depends on the food you eat. If you eat food with too much saturated fat, you get a high level of cholesterol. 
3) Weight- If you are obese, you are more prone to get cholesterol. Thus, you need to lose weight
4) Exercise- Exercise regularly to maintain a perfect cholesterol level
5) Stress- If you are a student, take breaks in between study timings to keep you less stress or if you are an adult, go for walks and do something that you like the most to calm your brain down.

Q3) Cholesterol causes plague to grow in your hearts. This thick, hard plague will block the arteries and will cause heart attacks and strokes. 

Q4) Pros- <span>Helps maintain healthy cholesterol levels, lowers risks of heart attacks and strokes
       Cons- C</span><span>ould create too many HDL leaving not enough cholesterol for the body to be healthy.

Hope this helps :))

~Top
</span>
7 0
3 years ago
After lunch, our blood sugar is high. Insulin is released in order to lower our blood sugar to an acceptable level. What is the
kumpel [21]

Answer:

Homeostasis

Explanation:

It is what makes to where you are a warm enough temperature that's not to hot and not to cold. It tells all the cells in that one part of your body what to do keep it balanced. If you don't understand this just comment on my answer and say what you need to tell me so I know what to adjust so you can understand it.

8 0
3 years ago
Which of the following helps an ecosystem "fix" problems after a disturbance?
vitfil [10]
High trees
Explanation
4 0
2 years ago
Which three components make up almost all of the energy earth receives from the sun?
OlgaM077 [116]
Visible light, UV light, and Infrared Radiation I believe.<span />
6 0
3 years ago
Read 2 more answers
When seeds germinate the shoot automatically grows up out of the soil and
Temka [501]

Answer: The shoot grows up towards the sunlight is Positive Phototropism

The root grows down the soil is Positively Geotropism / positive gravitropism.

happy to help again :)

3 0
3 years ago
Read 2 more answers
Other questions:
  • Name 3 types of fossils and describe how they form
    10·2 answers
  • How does a diversity of organisms increase the chances that some will survive a major change in environment ?
    11·1 answer
  • What are the two main types of rock found in the leeuwin national park?
    5·1 answer
  • Explain the statement: “Cells are the basic units of structure and function in living things.”
    6·2 answers
  • How do I do this lab report assignment?
    13·1 answer
  • A scientist believes that she has found a new life form. Which of the following conditions is not considered essential in determ
    11·1 answer
  • Give an example of a biochemical similarity between two different organisms
    7·2 answers
  • What part of the rotifer is responsible for crushing food?
    7·1 answer
  • The options are: ecosystem, population, food web, or niche
    6·1 answer
  • Based on what you were told about the
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!