21. In 1960, an invasive species of fish was introduced into the stable ecosystem of a river.
Since then, the population of a native fish species has declined. This situation is an example of
an
1) Ecosystem that has recovered
2) Ecosystem altered through the activities of humans.
3) Environmental impact caused by physical factors
4) Ecological niche without competition

Answers

Answer 1
4) ecological niche without competition

Related Questions

If 65,000 kcal are
available in the
producers trophic
level, how much
energy is available
to the secondary
consumers?

Answers

Answer:

13000 would be avalable because 10% is taken every time it is eaten so 65,000 with 10% taken out twice (20% of 65,000) is only 13,000 kcal available to the secondary consumers.

Which is not an immune system disorder
- Allergies
- Asthma
- Fungi
- HIV/AIDS

Answers

Answer:

Fungi

Explanation:

Answer: Asthma

Explanation: Asthma is Shortness of breath, wheezing, and cough are symptoms of a LUNG ILLNESS characterized by constriction of the airways, the tubes that convey air into the lungs, which are irritated and restricted.

need help with this please

Answers

Answer:

Nucleic Acid

Explanation:

Have a good day :)

Which type of evidence provides the best support for the hypothesis that the ancestors of tetrapods evolved legs before tetrapods were first seen on land?

Answers

Answer:

" Fossil record" is the right answer.

Explanation:

Prior knowledge, comprising fossils, rests as well as impressions of species perfectly deposited throughout sedimentary rock throughout early archaeological eras.These are established upon this superpose law which always claims that perhaps the lower layers typically younger than the whole upper ones in uninterrupted factors leading.

______ farming, or production for cash, usually take place on large holdings.

Answers

Cash crop farming, or production for cash, usually take place on large holdings. I think.

Explain how an aquatic biome could consist of multiple ecosystems. Include at least two examples of ecosystems in your explanation.

Answers

Answer:

an aquatic ecosystem is an ecosystem in the body of water examples are marine ecosystem and fresh water ecosystem

An aquatic ecosystem is an ecosystem in the body of water examples are marine ecosystem and fresh water ecosystem.

What is ecosystem and example?

An ecosystem is a area where flora, faunna, and other organisms, as well as weather , work together to form a life.

Examples of land-based ecosystems are forest ecosystems, grassland ecosystems, tundra ecosystems, and desert ecosystems.

Thus, An aquatic ecosystem is an ecosystem in the body of water.

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An individual has type ab blood. The father has type a and the mother has type b. What is the individual's phenotype an example of

Answers

Answer:

Codominance

Explanation:

Codominance is a type of inheritance pattern in which two alleles of a gene both express themselves in a heterozygous state. Codominance occurs when neither of the two alleles involved are recessive instead both dominate simultaneously.

As described in this question, the father of an individual has type A blood and the mother has type B. However, the individual has type AB blood. This is because alleles for blood types A and B both phenotypically express themselves in the individual. Hence, blood type A and B are said to be codominant and the AB phenotype is showing an example of CODOMINANCE.

How does air pollution affect water pollution?

Answers

Air pollution can also have a direct effect on water pollution. When particles like sulfur dioxide get high into the air they can combine with rain to produce acid rain. Acid rain can turn lakes acidic, killing fishes and other animals.

1. How
or an
alkali
you test to see if a liquid is an acid​

Answers

When acidic solution is placed on litmus paper, the blue litmus will turn red while the red litmus will stay red. Alkalis turn red litmus blue while the blue litmus stays blue. Distilled water is neutral and will leave the litmus colour unchanged

Which term is defined as the components in an ecosystem, such as soil, air, and sunlight?

biometric
antibiotic
abiotic
biotic

Answers

Explanation:

Abiotic factors refer to non-living physical and chemical elements in the ecosystem. Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere. Examples of abiotic factors are water, air, soil, sunlight, and minerals.

the increase to heart rate is a normal homeostatic response and allows for an adjustment of the body's set point during exercise. Identify one other response that your body makes to help maintain homeostasis for a "set point" that can't be adjusted & Describe why it does that. *

Answers

Answer:

it increases oxygen levels and decrease carbon dioxide levels

How many races of people are there?

Answers

Answer:

Caucasian, Mongoloid or Asian, Negroid or Black, and Australoid are the four major race classifications in the world, according to most anthropologists. The racing classification system was created in 1962 by Carleton S. Coon. The four major races are then divided into 30 subgroups.

Explanation:

Answer:

The world population can be divided into 4 major races, namely white/Caucasian, Mongoloid/Asian, Negroid/Black, and Australoid. This is based on a racial classification made by Carleton S. Coon in 1962.

hope this helps

have a good day :)

ps I looked it up

Explanation:

I thought it was a lot xD

What is the negative impact of paper on society

Answers

Answer:

Deforestation has increased. Paper manufacturing used up to 40% of the global wood. The process of making paper releases nitrogen dioxide, sulfur dioxide, and carbon dioxide into the air, contributing to pollution such as greenhouse gases.

Explanation:

hope this helps!!!!!!

For the following nitrogen base sequence, write the complimentary sequence on the line provided.
A – T – C – C – T – A – G – A – A
_________________________

Answers

Answer:

TAGGATCTT

Explanation:

a - t

c - g

Which of the following limit cell size? Select all of the answers that apply.

Answers

Where is the picture?

if a badger has 23 chromosomes in it’s egg cell, how many chromosomes are in it’s muscle cell?

Answers

Answer:

46 in it muscles cell

Explanation:

You just need to remember the sex organ is half of the number of the other cell.

One of the pieces of evidence for evolution that Charles Darwin collected on his travels aboard the HMS Beagle was the observation of fossils of extinct animals and similar, but noticeably different species. Giant ground sloth fossils were very similar in shape to the bones of sloths that inhabited the regions of South America he was exploring. The main difference was the size, as the ground sloth fossils were significantly larger that the bones of the sloths he captured alive. What was a conclusion that Darwin was able to arrive to based on this piece of evidence

Answers

Answer: Darwin was able to arrive at a conclusion that there was no relationship between the fossils of the ground sloth and the bones of the captured sloths that currently reside in South America.

Explanation:

Evolution is defined as the sum total of adaptive changes that have taken place over a very long period of time. It leads to the development of new species from earlier ones. Evolution is an extremely slow process. It is difficult to obtain direct evidence of evolution in action. However, scientist such as Darwin, have gathered a great deal of indirect evidence that supports the theory of evolution. These evidence comes from many sources including:

--> fossils records

--> biochemical similarities

--> molecular records

--> Comparative anatomy and

--> embryology.

FOSSILS RECORDS shows the existence of species that are now in extinct which lived on Earth during different periods of the planet's history. They provide evidence that organisms from the past are not the same as those found today due to adaptive changes that has occurred over a long period of time on the organism in order to survive in its environment.

There was no relationship between the sloths because of the difference in BONE MASS.

Where do plants and animals get carbon? Explain​

Answers

Answer:

From the air

Explanation:

For plants especially its the sunlight. The animals then eat the plants transferring the carbon into their bodies.

Answer:

Where do plants and animals get carbon? Explain​

Remember that plants and other producers capture carbon dioxide and deplete it in glucose (C 6 H 12 O 6) through photosynthesis. Then when animals eat plants and other animals, they get the carbon from those organisms.

Explanation:

I hope it helps you :)♫

Phosphorylation of ADP to ATP occurs
A. via ribosomes on the endoplasmic reticulum.

B. in the nucleus

C. in the mitochondria

D. within the cell membrane

Answers

Answer:

C. in the mitochondria

Explanation:

Mitochondrial ADP/ATP carriers transport ADP into the mitochondrial matrix for ATP synthesis, and ATP out to fuel the cell, by cycling between cytoplasmic-open and matrix-open states. ... Because these features are highly conserved, this mechanism is likely to apply to the whole mitochondrial carrier family.

Answer:

C. in the mitochondria

Explanation:

Phosphorylation of ADP to ATP occurs in the mitochondria.

are males more likely to have hypophosphatemia than females explain

Answers

Answer:

Males are more likely to have hypophosphatemia.

Explanation:

In females, a mutation would have to happen in both copies of the genes to cause the disorder. It is rare having females with 2 altered copies of this gene. Males are X-linked by recessive disorders much more frequently then females.

How can you check the accuracy of the results of your experiment?

1. by testing different variables
2. by assuming your results are correct
3. by completing a different experiment
4.by repeating your experiment

Answers

Answer:

I think either 1 or 4 but I think 1

Answer:

Explanation:

4 is the answer

PLZZ HELP ME THIS IS AN ASSIGMENT I WANT YOU TO DO IT IN YOUR OWN WORDS AND NO SCAMMED
1.)Skilled Scientist level from Rubric: Student used critical thinking skills and evidence to establish a possible relationship among organisms and a possible evolutionary history of traits.
How many different species are there?


2.) List the different genus groups:


3.) Explain in your own words the order in which the creatures’s traits may have evolved starting from the first likely trait. (HINT: Which trait is the most common across the creatures? Be sure you list ALL of the physical features from the key above from most common to least common)

Answers

Answer:^^^^

Explanation:

above me is correct!

What is expected to happen to the species that is less suited to
compete for resources if the competitive exclusion principle is
observed?

Answers

Answer:

die out and move from the area are the answer

Explanation:

Anatomical terminology was standardized to do
which things? Select all that apply.
to consolidate the study of history into
smaller textbooks
to streamline communication related to the
health sciences
to avoid confusion and miscommunication
when discussing parts of the body
to get people more interested in joining the
health-science industry

Answers

I think it would be the middle 2 answers.

Answer:

B. To streamline communication related to the health sciences

C. To avoid confusion and miscommunication when discussing parts of the body

Explanation:

ANSWER ASAP LOOK AT THE PICTURE BELOW


CORRECT ANSWER = BRAINLIEST!

LINKS OR FILES = REPORT

Answers

Answer:

A

Explanation:

Assuming these are carbon dioxide molecules, which way do you think the molecules will move and why?

A. Out of the cell. They want to move from high to low concentration (DOWN the concentration gradient)

B. Into the cell. They want to move from low to high concentration (UP the concentration gradient).

Answers

Answer:

A. Out of the cell. They want to move from high to low concentration (DOWN the concentration gradient)

Explanation:

Although the cuticle provides important protection from excessive water loss, leaves cannot be impervious because they must also allow carbon dioxide in (to be used in photosynthesis), and oxygen out. These gases move into and out of the leaf through openings on the underside called stomata (Figure 3b).

Answer:

A. Out of the cell. They want to move from high to low concentration (DOWN the concentration gradient)

Explanation:

The option (A) is the correct answer. This statement is the required answer.

The pH of 1 to 6 is basic
true or false

Answers

Answer:

False

Explanation:

Answer:

False

Explanation:

PH is acidic between 0 and 7, and basic when it is over 7.

7 is neutral.

The expression of both alleles for flower color produces a new pink. this illustrates incomplete dominance. Which of the following would be correct phenotype ratio from a cross between two heterozygous pink flowers

Answers

Answer:

C is the answer

If the half-life of a radioactive substance is 500 million years and you have
192 atoms of it, how many half-lives will have passed by the time that only 3
atoms of the substance remain?
A. 4
B. 5
C. 6
D. 2.

Answers

The number of half-lives that has elapsed when 3 atoms of the radioactive substance remains is 6 (Option C)

Data obtained from the questionHalf-life (t½) = 500 million yearsOriginal amount (N₀) = 192 atomsAmount remaining (N) = 3 atoms Number of half-lives (n) =?

How to determine the number of half-lives

2ⁿ = N₀ / N

2ⁿ = 192 / 3

2ⁿ = 64

2ⁿ = 2⁶

n = 6

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Can someone help I’ve been stuck at this question for the past 10 minutes


A _____ extinction occurs when many species go extinct in a relatively short period of time

Answers

Answer:

I think it's

A mass extinction occurs when many species go extinct in a relatively short period of time.

Explanation:

Mass extinction is usually defined as a loss of about three-quarters of all species in existence across the entire Earth over a “short” geological period of time. Hence, I think the answer is correct.

Answer:

The correct answer is Mass

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