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

A cut parallel to the midsagittal plane would produce a ________ section. A cut parallel to the midsagittal plane would produce a ________ section. parasagittal superior frontal transverse coronal

Answers

You can use all the words is good to it

what is photo synthesis ?​

Answers

[tex]\sf\purple{Photosynthesis}[/tex] is a process by which phototrophs convert light energy into chemical energy.

The word “photosynthesis” is derived from the Greek words "phos" (which means “[tex]\sf\pink{light}[/tex]”) and "σύνθ-εóîς" (which means “[tex]\sf\red{combining\:together}[/tex] .”) And so it means “combining together with the help of light.”

The process of photosynthesis occurs in green plants (the primary producers in a food chain) and a few other autotrophic organisms such as cyanobacteria, purple bacteria and green sulfur bacteria.

Following is the photosynthesis formula:

6 CO2 + 6 H2O —> C6 H12 O6 ([tex]\sf\blue{glucose}[/tex]) + 6 O2 ([tex]\sf\pink{oxygen}[/tex]).

[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{.}}}}}[/tex]

Answer:

the process by which green plants and some other organisms use sunlight to synthesize nutrition form carbon dioxide and water.

number the steps for using a microscope to view a slide order from 1-11

Answers

can u zoom in cant see it

Which 'if any' of the following are true? Aquatic animals present a greater risk to divers than any other factor. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify. Because they are perceived as more aggressive, men are more likely to be the victim of an aquatic animal attack than women are. None of the above.

Answers

Answer:

B. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify.

Explanation:

What can happen when a community becomes isolated from the rest of its species for many generations?

a) Competition between individuals will decrease.

b)The community will grow more slowly.

c)A new species can form.

d)There would be no effect on the community.

Answers

Answer:

C) A new species can form.

Explanation:

This is the concept of genetic drift, where a species being isolated gets an unnatural change in the gene pool, and thus can evolve differently.

How do wales differ from fish

Answers

Answer:

Whales are mammals that need air from the sea's surface to survive. Whales are capable of giving birth to live young. Fish have gills and use them to draw oxygen from the water. The majority of fish lay eggs. Whales and other marine animals with horizontal tail fins, such as dolphins, have vertical tail fins, while fish have vertical tail fins.

hope this helped!

Whales are mammals
They need air to survive and they give out babies nine eggs

The ability of our bodies to maintain internal stability is called:
A. Balance

B. Digestion

C. Hypertonicity

D. Homeostasis

Answers

Answer:

D. Homeostasis

Explanation:

The ability of our bodies to maintain internal stability is called: Homeostasis

Which of the following is a result of limiting weed growth through mulching?

A. lowers the need for herbicides
B. increases the amount of pests
C. lowers the amount of crops that can grow
D. increases the need for water

Answers

Answer: its B or D

Explanation: ihope this helps

The nervous system is primarily composed of what type of cells?

A stem cells
B white cells
C skeletal muscle cells
D neurons

Answers

Answer:

D. Neurons

Explanation:

Nervous tissue is composed of two types of cells, neurons and glial cells. Neurons are the primary type of cell that most anyone associates with the nervous system. They are responsible for the computation and communication that the nervous system provides.

Answer:

D. neurons

Explanation:

i need it fast

Bacteria and other micro organisms grow and produce acids. Ravi’s mouth was
checked before and 1 hour after eating, at 15 minutes intervals. It was seen that
the environment inside the mouth was becoming more and more acidic, after
every 15 minutes.

a. Explain the reason for this.

b. Suggest the possible effects of this on the teeth.

c. How can you prevent this?​

Answers

Answer:

hey

Explanation:

i think its because f the bacteria forming inside the moith due to food

the teeth can detiriorate and break down

by brushing daily

Answer:

check cbse textbook gr.7 pg19

care of teeth

Explanation:

just go check it jobless sreerag

a group of cells which have a common origin,structure and function​

Answers

A tissue is composed of a group of cells which have a common origin, structure and function.

11. The heart is made of *
O involuntary cardiac muscle
O voluntary muscle
O skeletal muscle

Answers

the heart is made of involuntary cardiac muscle. to help you remember, cardiac is defined as “relating to heart” so if you’re ever stuck in this question again, look for the word “cardiac” and “heart”

Answer:

involuntary muscle

Explanation:

The heart has 4 different lobes with two on each side and arteries connecting both sides. The heart is made of bones and involuntary muscle. This is the reason why the heart is able to make beats. The answer is involuntary muscle.

Explain how sampling methods are used in ecological studies

Answers

Answer:

When using random sampling techniques, large numbers of samples/records are taken from different positions within the habitat. A quadrat frame is most often used for this type of sampling.

hi! i’ll give brainliest please help

Answers

Deposition of eroded material I believe is correct because Sedimentary layers are formed overtime from older rocks that have been broken apart by water or wind and often from chemical changes.

pls help asap pls help​

Answers

7. More than 6 months
8. 15 percent
9. Corn
10. 1
11. What types of markets are available?

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.

If H X G means H is to the South of G
H + G means H is to the North of G
H ÷ G means H is to the East of G
H-G means H is to the West of G
Then, in A÷ B +C-D; D is in which direction with respect to B.
a)North

b)South

c)North-East

d)South – East

Answers

Answer:

C. North-East

Explanation:

North" (and any subsequent words) was ignored because we limit queries to 32 words.

Provide an example of how eukaryotic cells are used in biotechnology: *

Answers

Answer:

Eukaryotic cells are plants, animals, protists, fungi. Their genetic material is organized in chromosomes. Golgi apparatus, Mitochondria, Ribosomes, Nucleus are parts of Eukaryotic Cells.

Animals such as cats and dogs have eukaryotic cells.

Plants such as apple trees have eukaryotic cells.

Fungi such as mushrooms have eukaryotic cells.

Protists such as amoeba and paramecium have eukaryotic cells.

Insects have eukaryotic cells.

Humans are composed entirely of eukaryotic cells. Related Links: Examples.

Explanation:

Bacterial strains, especially Actinomycetes have been used in biotech production and drug discovery for years. Genetic methods now open the field of combinatorial biosynthesis that has improved impressingly in the past couple of years. Also, the productivity of yeast and other fungi in a variety of different processes has improved significantly since genetic methods have been introduced. In addition, a number of recent works considerably widens the potential of plant biotechnology. This review covers examples describing the use of prokaryotic cells and plant cells in biotech production.

Hope this helps! ^^

Bacterial strains such as Actinomycetes have been used in biotech production and drug discovery for years.

What is Biotechnology?

Biotechnology is defined as the integration of natural sciences and engineering sciences to achieve the application of organisms, cells, their parts and molecular analogs to products and services.

It is described as the technology that uses biological systems, living organisms or parts thereof to develop or create various products such as brewing and baking bread are examples of processes that fall under the concept of biotechnology where the use of yeast i.e. living organism to prepare the desired product, bacterial strains such as Actinomycetes for making drug etc.

The most important area of biotechnology is the production of therapeutic proteins and other drugs through genetic engineering.

Thus, Bacterial strains such as Actinomycetes have been used in biotech production and drug discovery for years.

Learn more about Biotechnology, here:

https://brainly.com/question/12871062

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Is there a way to know any test exam style questions for 9th grade biology because biology is a very complex subject and lots of information to learn and I want to study the key details thanks:D

Answers

So I’m doing 9th grade bio honors rn and what I find works really well is the Barron’s review books.

which process uses carbondioxide present in the air
a.burning of fossil fuels
b.production of glucose
c.asimillation in animals
d.breakdown of organic matter

Answers

Answer:

a.burning of fossil fuels

Answer:

b.production of glucose

Match the structure with the correct type. A structure type may be used more than once. 35.bat wing and mouse arm_____A. homologous structure 36.reptile foot and bird foot ____B. analogous structure 37.dolphin fin and fish tail ____C. vestigial structure 38.eves on a blind cave fish ____ 39.snake tongue and dog nose ____

Answers

Answer:

35. A. homologous structure

36. B. analogous structure

37. B. analogous structure

38. C. vestigial structure

39. B. analogous structure

Explanation:

A homologous structure is a similar structure/trait found in different species because they diverged (evolved) from a common ancestor, i.e., these species share a common ancestor that had the homologous structure/trait. A homologous structure may have the same or different functions in the descendants. Conversely, an analogous structure is a similar structure/trait that evolved independently (i.e., by convergent evolution) in different species to have the same function, thereby these species don't share a common ancestor with the trait. Finally, a vestigial structure is a rudimentary biological structure found in an organism that has lost its original/ancestral function (e.g., the appendix in humans or the hindlimbs of the snake). Vestigial structures provide strong evidence for evolution by use/disuse of body parts.

Homologous and Analogous structures differentiate in origin and function. Vestigial structures have lost their function. A) Homologous, B) analogous, C) analogous, D) vestigial, E) analogous.

What is an homologous structure?

Homologous characters are the structures of different organisms that,

are composed of the same basic elements. share the same position in the body and the same relationship with adjacent structures.share the same embryological development.

These structures might express some variations between the organisms that might be related to their function and to the environment. Their function is not necessarily the same in all the organisms involved.

These homologous characters are present in organisms related that share a common ancestor.

What is an analogous structure?

Analogous structures are those body parts of different organisms that accomplish the same function, but they are originated from different areas. These structures do not share the same origin.

What is a vestigial structure?

Vestigial structures are those body parts, genetically determined, that have been retained during the evolution of the taxonomic group but have lost or reduced their original function.

Such vestigial structures were plenty functional in the ancestors of new species, but now are typically degenerate, stunted, or rudimentary, and tend to be much more variable than homologous non-vestigial parts.

 

According to these definitions, we can answer the questions.

bat wing and mouse arm_homologous structure_reptile foot and bird foot _analogous structure dolphin fin and fish tail _analogous structure_eyes on a blind cave fish are _vestigial structure_ snake tongue and dog nose _analogous structure_

You will learn more about homologous, analogous and vestigial structures at

https://brainly.com/question/1017285

https://brainly.com/question/882540

https://brainly.com/question/2882009

https://brainly.com/question/478049

https://brainly.com/question/1891149

What is the purpose of mitosis?

Answers

Answer:

Mitosis creates more diploid cells by copying each chromosome and moves it to the other side of the cell.

Explanation:

This lets the cell get divided straight down the middle.

This is the name given to all of the water on Earth.
atmosphere
hydrosphere
biosphere
lithosphere

Answers

Answer:

Explanation:

hydrosphere

2

since hydro means water btw

please mark brainliest

Often organisms seem similar in their outward appearances. For example, a porpoise and a shark seem closely related, but they are not. Such similarity is the result of .

Answers

Answer: Such similarity is the result of CONVERGENT EVOLUTION

Explanation:

Evolution can be defined as the theory that was developed based on the findings of scientists that living organisms are descended from a common ancestor.

The current theory of the process of evolution makes use of present day knowledge of genes and chromosomes to explain the source of genetic variation upon which natural selection works. It postulates that although natural selection is the only force that regularly produces adaptive evolutionary change, other forces too play a part in evolution.

Evolutionary changes may show the following patterns:

--> one species gradually transform into another species.

--> one or more species evolve as offshoots of a single ancestral species to fill a wide variety of habitat. This is known as divergent evolution.

--> Many superficially similar looking species arise from different ancestral species. This is known as CONVERGENT EVOLUTION. It is shown by organisms occupying very similar kinds of environment. That is why a porpoise and a shark seem closely related, but they are not.

Toxic gases enter earth due to

Answers

Explanation:

Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities

I need help once again!!

Answers

Answer:

I believe the answer is A. An organ system supports all parts of the organism.

Explanation:

This answer makes the most sense to me.

What would you expect to occur if you were to repeatedly lift 25 pounds over your head for 1 minute, rest for 1 minute, and then repeat the exercise?

Answers

Your weight would remain the same

How do you think new proteins affect the fitness of children?



They have no effect on fitness


They increase fitness


They decrease fitness


All of the above

Answers

Answer:

All of the above

Explanation:

Protein is especially important to consume after a workout, as during exercise you are effectively breaking your muscles down. That is why it's common to see people at the gym eating protein bars or drinking whey shakes when they have finished their routine. It helps to increase the impact of their exercise.

Excess protein consumed is usually stored as fat, while the surplus of amino acids is excreted. This can lead to weight gain over time, especially if you consume too many calories while trying to increase your protein intake

Some high-protein diets include foods such as red meat and full-fat dairy products, which may increase your risk of heart disease. A high-protein diet may worsen kidney function in people with kidney disease because your body may have trouble eliminating all the waste products of protein metabolism.

when two heterozygous individual are crossed,the proportion of the offspring that are true breeding for dominant trait is

Answers

Answer:

75%

Explanation:

If you drew a Punnett Square, you will see that the possible outcomes would be AA, Aa, aA, and aa. Three out of the four would exhibit the dominant trait.

how is human population dealing with air pollution?

Answers

Answer:mostly people build trees near the factory areas stop using vehicles which produce etc.....HOPE IT HELPED
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