Give two reasons why humans need a balanced ecosystem.​

Answers

Answer 1

Answer:

1To purify the air so we can breathe properly

2Sequester carbon for climate regulation


Related Questions

What is one condition that must be met for a population to be in genetic equilibrium?

Answers

Answer:

Hardy-Weinberg equilibrium

Explanation:

In order for the population's gene pool frequencies to remain constant, the Hardy-Weinberg equilibrium must be met. Random mating, no mutation, migration, or natural selection must all be present, as well as a big sample size.

OAmalOHopeO

What does the phosphorylation of Cdc25 by M-Cdk do? Question 4 options: It inactivates Cdc25, which promotes activation of more M-Cdk. It activates Cdc25, allowing the cell to exit mitosis. It activates Cdc25, which inactivates M-Cdk. It inactivates Cdc25, preventing further activation of M-Cdk. It activates Cdc25, which in turn activates more M-Cdk.

Answers

Answer:

It activates Cdc25, which in turn activates more M-Cdk

Explanation:

Cyclin are enzymes that regulate cell cycle progression by the activation of cyclin-dependent kinases (CDKs). These cyclins have no enzymatic activity on their own but they can activate Cdks by binding and phosphorylating them. CDKs can be activated by phosphorylation of activating sites and/or dephosphorylation of inactivation sites. Moreover, M-phase cyclins are cyclins that form M-CDK complexes in order to modulate the cell's entry into mitosis. Cdc25 is a phosphatase involved in the eukaryotic cell cycle which is well-known to regulate the entry into and progression during S (DNA Synthesis) phase and mitosis. In this regard, it has been shown that mitotic phosphorylation of Cdc25 by M-Cdks increases its intrinsic phosphatase activity, thereby Cdc25 is able to remove inhibitory phosphates from M-Cdk and, consequently, activate more M-Cdks.

"What if speciation occurred in humans?" Your essay should give a clear and precise example of speciation.
A student is asked to write an essay over the hypothetic prompt above. While brainstorming, the student came up with
four different ideas for their essay. Which idea is BEST aligned with the writing prompt and instructions?

Answers

The term speciation refers to the process by which two or more different species are produced from a single original population by different speciation mechanisms. Speciation occurs in three main steps: separation of the original population, divergence (trophic divergence, reproductive divergence, genetic divergence, etcetera), and isolation.

The most related option to speciation is  B. Two populations of humans living on separate sides of the ocean. After a catastrophic event, travel across the ocean is not possible. After millions of years of separation, the two groups are no longer able to produce viable offspring together, but can still produce within their isolated groups.

Speciation occurs when the original population is divided into two groups.  They inhabit different places and are exposed to varying environmental conditions. With time, each group experience many genetic changes. These mutations depend on each group´s environment and its ecological pressures, and they accumulate in time. Pressures act on individuals and make them adapt to the new environmental conditions. Generation after generation, the genotype of individuals will increase the fitness to survive and reproduce. Fixation of mutations will increase the difference between the two groups, up to the diverging point into two new species. Even is they get together again, these species will not be able to mate and produce offspring, and if they do, the new generations will not be viable or fertile.

The exposed case of two human population living on different sides of the ocean, is an example of allopatric speciation.

Allopatric speciation refers to the geographic separation of a continuous genetic background, originating two or more new geographically isolated groups. During these events of speciation, emerging new barriers impede genetic flow between groups, as the two new populations that are separated can not get together and mate anymore. These barriers might be geographical or ecological.  

Different stages are involved in the allopatric speciation process:

• The emergence of the barrier.  

Interruption in the genetic flow

Slow and gradual differentiation due to the occurrence of mutations in each population and their accumulation in time.  

Genetic divergence by natural selection and reproductive isolation,  impeding the two groups to mate even if the barrier disappears.  

Prezigotic isolation mechanisms favored by selection a secondary contact between the new species occurs.

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Answer:b

Explanation:

usatestprep

differentiate between kidneys and lungs​

Answers

Kidneys are used to excrete urine and toxic wastes. They are very essential for keeping the body clean. Usually it excretes urea, sodium and some salts which are considered as waste in the body.

Lungs are used to breathe in and out air. It helps us to stay alive. We breathe in oxygen rich air and breathe out foul carbon dioxide air.

What are the functions of Amoeba Organs​

Answers

Explanation:

The function of amoeba organs is nuclear.

Which of the following describe proteins? Check
all that apply.
O a large class of molecules made up of sugars
a type of molecule that can initiate or assist
other processes in the body
O a large class of molecules made up of amino
acids
O a molecule that stores the information for the
creation and functioning of cells

Answers

Answer:

a large class of molecules made of amino acids...since amino acids are the smallest particles that make up proteins.

I hope this helps

Answer: For the multiple choice the answers are B and C

Explanation: Just had this question in class

Why are amphibians considered as unsuccessful land vertebrates​

Answers

Bc amphibians arent as cool
Amphibians are unsuccessful vertebrates because there are several land habitats to which they have failed to adapt.

Which of the following is not one of the steps of the water cycle?
A. Condensation of water vapor into clouds.
B. Throughflow of underground water back to the ocean.
C. Respiration of water into the atmosphere.
D. Transpiration of water into the atmosphere.

Answers

The option that is not one of the steps of the water cycle includes options C(Respiration of water into the atmosphere)

and D(Transpiration of water into the atmosphere).

Water cycle can be defined as the constant flow or movement of water through earth, atmosphere and the oceans either in liquid states or vapour.

The four main steps of water cycle includes:

EvaporationCondensationprecipitation and Collection (this leads to formation of underground water which gradually flows back into the oceans).

In nature, water circulates mainly within the abiotic (non-living) environment; only a small proportion recycled through living organisms.

Therefore respiration and transpiration which occurs through living organisms doesn't form the major steps of water cycle, hence the correct option is C (Respiration of water into the atmosphere) and D (Transpiration of water into the atmosphere).

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different between dominant character and recessive character​

Answers

Dominant character:are always expressed when the connected allele is dominant,even if only one copy of the dominant trait exits.

Recessive character:are expressed only if both the connected allele are recessive.

Answer:

Dominant and recessive traits exist when a trait has two different forms at the gene level. The trait that first appears or is visibly expressed in the organism is called the dominant trait. The trait that is present at the gene level but is masked and does not show itself in the organism is called the recessive trait.

Explanation:

If some traits are absent or not expressed, but found in the parent, then the allele is said to be recessive.

Difference Between Recessive and Dominant Traits

DOMINANT

Dominant Trait Recessive Trait

Dominant allele is denoted by a capital letter

RECESSIVE

Recessive allele is denoted by a small letter

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Why do cells use fat and starch for long-term energy storage instead of ATP molecules?
O ATP is used for long-term storage, while fat and starch are used for immediate energy.
O ATP is used for short-term energy and to build molecules of starch and fat.
O Fat and starch are unstable and can be stored short-term, while ATP molecules are stable and stored long-term.
O Fat and starch are stable if used as energy immediately, while ATP is used as long-term storage.

Answers

The answer to your question is B :)

Answer:

Cells use fat and starch for long-term energy storage instead of ATP molecules because fat and starch are more efficient energy storage molecules than ATP.ATP is a molecule used for immediate energy, not for long-term energy storage.

Fat and starch are complex carbohydrates that can be broken down to release energy. Fat molecules are primarily composed of carbon and hydrogen, while starch is made of glucose molecules.Both fat and starch can be broken down through cellular respiration to produce ATP molecules that can be used to power various cellular processes.
However, because fat and starch molecules contain more chemical energy than ATP, they can provide a much larger amount of energy over a longer period of time.

Furthermore, ATP molecules are relatively unstable and cannot be stored for long periods of time, while fat and starch can be stored in specialized cellular structures for long-term energy needs.

Which of the following factors does not affect soil formation?
a. precipitation
b. time
C. erosion
d. none of the above
Please select the best answer from the choices provided
B
Ο Ο Ο Ο
PLS HELP ASAP

Answers

Erosion EASY precipitation effects soil so does time the longer the more it changes

Answer:

b is the answer

Explanation:

edge2021

The exchange of genetic materials between homologous chromosomes is called


a. synapsis

b. chiasmata

c. crossing over

d. cytokinesis

Answers

Answer:

c is correct answer ......

it's c;
crossing over
Chromosomal crossover, or crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes' non-sister chromatids that results in recombinant chromosomes.

What are the pigments in cyanobacteria used for?

Answers

Answer:

Pigments are useful to plants and other autotrophs

Explanation:

Not sure, but hope this helped a bit

Which of the following statements are true about antibodies?

A. Both Polyclonal and Monoclonal antibodies are naturally produced in immune
responses.
B. Polyclonal antibodies are part of the natural immune response; monoclonal antibodies
are clones of plasma cells used for medical research.

C. Polyclonal antibodies are used for the treatment of cancer, monoclonal antibodies are
used for medical research.
D. Monoclonal antibodies work against many types of antigens; polyclonal antibodies
work against a specific antigen.

Answers

Answer:

both a and b are the correct answers

The purpose of Mendel's experiments with dihybrid crosses was to determine
whether:
A. an F2 generation could be produced from the Fi offspring.
B. one of two traits could be transformed by DNA.
O c. one trait would affect how another is inherited.
D. traits are controlled by more than one gene.

Answers

Answer:

C. one trait would affect how another is inherited

Explanation:

a) What is the earth's path around the sun called? b) How long does it take for Earth to complete a complete circuit around the Sun? c) Name one planet that is closer to the Sun than Earth and another one that is further away. .​

Answers

A) orbit
B) 365.25
C) mercury and Uranus respectively
Planet Earth's orbit around the sun, it's called Orbit.

---

It takes Earth 23.934 hours to complete a rotation on its axis and 365.26 days to complete an orbit around the sun — our days and years on Earth are defined by these gyrations.

---

Kid-Friendly Neptune

It's the last of the planets in our solar system. It's more than 30 times as far from the Sun as Earth is. Neptune is very similar to Uranus

A standing water source is used for water storage, flood control, or
electricity, it is called a
____?

Answers

Answer:

A Dam

Explanation:

Dams can be used for storing water, flood control, and generating electricity.

A farmer decides to try to increase his profits by mating his two goats that produce the most milk together. The farmer’s descendants continue the process and over 400 years the family produces goats that make more milk than any in the country. Eventually the goats change enough that they are designated a new species. This is an example of:

A. Artificial selection
B. Acquired characteristics
C. Disruptive selection
D. Natural selection

Answers

D. Natural Selection

Answer:

A.is the correct answer

Explanation:

People have been doing asimple form genetic enineeringfor thousands of years. This is called selective breeding. Selective breeding, or artifical selection, is a process where people try and improve plants and animals by selecting and breeding those that have desireable charactistics.

For example, a farmer might choose from his two largest cattle in his herd and breed them  together so that the offspring will be even bigger and produce more meat.

HELPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!! All of the following cause mechanical weathering EXCEPT ____. a. ice c. burrowing animals b. tree roots d. carbonic acid

Answers

Explanation:

c. burrowing animals is the answer

NOT A QUIZ: 10 POINTS!

Answers

Answer:

a. (black fur): phenotype

b. (AA, Aa, aa): genotypes

c. (Aa): heterozygous

d. (aa): hom0zygous recessive

e. (AA): hom0zygous dominant

Explanation:

In an experiment, researchers find that certain neurons in the visual cortex preferentially fire in response to a bar of light that is oriented at a specific angle, and that different neurons similarly respond to bars of light oriented at different angles. This finding provides the strongest evidence for:

Answers

Answer:

Feature detection

Explanation:

Feature detection involves different neurons that are activated in response to specific stimuli. For example, feature detectors are activated in the cerebral cortex through visual stimuli of specific shapes or patterns. These neurons become more and more complex as the stimuli also become progressively more complex and specific. Featured detector neurons have been identified in the toad vision, where they have been involved in the toad's behavior in response to worm-like moving stimuli (e.g., orienting), and the bat auditory cortex, where they have been involved in the measurement of the distance between the bat and its prey.

what is photosynthesis?​

Answers

Answer:

Photosynthesis is the process by which plants prepare food using water, sunlight, chlorophyll and carbon dioxide

Answer:

It is the process in which green plants use sunlight to make there own food .

Explanation:

I HOPE YOUR DAY GOES GREAT.

what is not a function of plasma membrane

Answers

Answer:

the control center of the cell.

Which part of the brain is indicated by the arrow below?
Pons
Cerebellum
Cerebrum
Medulla oblongata

Answers

Answer:

the correct answer is option ( A ) pons

Explanation:

hope it helps you

Mark my answer as brainlist

have a nice day

Answer:

A. Pons

Explanation:

I got it right on my quiz :)

which type of motion dose not change the amino produced

Answers

Answer:

silent mutation. have a great day! :)

i was gonna answer but they answer already

Why do some researchers prefer to use embryonic stem cell in medical research?

A. There is no controversy surrounding the use of embryonic stem calls
B. The use of embryonic stem cell is much less expensive than the use of adult stem cells
C. No living tissue is damaged when scientists use embryonic stem cells
D. Embryonic stem cells are able to differentiate into a wider range of call than adult stem cells

Answers

Answer:

Cell therapies would use stem cells, or cells grown from stem cells, to replace or rejuvenate damaged tissue. Scientists also want to use stem cells to understand disease and find drugs that might treat it. Embryonic stem cells could be used to make more specialized tissues that have been lost to disease and injury

The researchers prefer to use embryonic stem cell in medical research as Embryonic stem cells are able to differentiate into a wider range of call than adult stem cells.

What are the functions of embryonic stem cells?

A blastocyst, an early-stage pre-implantation embryo, is the source of embryonic stem cells, which are pluripotent stem cells. Four to five days after fertilization, human embryos reach the blastocyst stage.

The human blastocyst, an early stage of the developing embryo that lasts from the fourth to seventh day after fertilization, contains embryonic stem cells (ESCs) in its inner cell mass. In typical undeveloped turn of events, they vanish after the seventh day.

The ability to differentiate into cell types belonging to the three germ layers (ectoderm, endoderm, and mesoderm) is what is meant by the term "pluripotent." the three distinct types of tissue that are present during embryonic development and later combine to form the adult.

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All cells are contained within a membrane called the:

A. Cell wall
B. Cytoplasm bilayer
C. Cytosol
D. Phospholipid bilayer

Answers

Answer:

Phospholipid bilayer

Explanation:

That is essentially the primary componenent of the cell membrane where phospholipids form two layers.

Correct the answer to your question is D :)

scientists who believe global warming is happening would agree with which of the following statements?
(A) There are few, if any, misconceptions about global warming
(B) Most scientists agree that global warming is occuring
(C) Human activity is a minor cause of global warming.
(D) There is little humans can do to stop global warming

Answers

Answer:

B. Most scientists agree that global warming is occurring.

Explanation:

There is a large deal of misconception in the public surrounding global warming. Human activity is the primary cause of global warming, and therefore, there are many actions that humans could take to stop global warming.

What is the difference between a food chain and food web

Answers

A food chain follows one path of energy and materials between species. A food web is more complex and is a whole system of connected food chains. In a food web, organisms are placed into different trophic levels. ... Producers are the basic trophic level while top predators are the peak level.

Answer:

A food chain is a sequence of organisms through which nutrients and energy pass as one organism eats another. A food chain must start with energy from the sun, have a producer (an organism that makes food by itself with energy from sun), and have at least one consumer eat and gain nutrients from another consumer or a producer. At the end of the food chain, there must be a decomposer to break down the dead animals into nutrients, which is beneficial for soil. Additionally, there must be arrows to indicate the flow of energy travelling from one organism to another. An example of a food chain would be:

sun -> roses -> caterpillar -> crows -> garter snakes -> mushrooms

Energy source: Sun

Producer: Roses

Consumer: Caterpillar

Secondary consumer: Crows

Tertiary consumer: Garter snakes

Decomposer: Mushrooms

A food web is basically an interconnection of multiple food-chains in a graphical representation to see which animal eats what and their niche (role they play in an ecological community). Here's an example of a food web (not mine, credits to creator):

Suppose you are a genetics counselor who is working with a 21-year-old pregnant woman who has just discovered that her father has Huntington's disease, a rare dominant autosomal trait. This disease usually develops in middle age, so people carrying this trait do not find out they have this genetic disorder until midlife. What are the chances that the child she is carrying will develop the disease

Answers

Answer:

s

Explanation:

Other Questions
Draw a frequency polygon for the following data:Marks0 - 1010 - 20 20 - 30 30 - 40 40 - 5050 - 60No. of Students71522301610 You have 576 feet of fencing to enclose a rectangular plot of land. Find the dimensions of the rectangular plot that would maximize the area. List the smaller number first. How would you describe the difference between the graphs of f(x)=2/3 x^3 and g(x)=2/3(-x)^3 Huffman Corporation constructed a building at a cost of $30,000,000. Weighted-average accumulated expenditures (WAAE) were $12,000,000, actual interest was $1,200,000, and avoidable interest was $1,600,000. If the salvage value is $2,400,000, and the useful life is 40 years, depreciation expense for the first full year using the straight-line method isa. $690,000b. $705,000.c. $720,000.d. $735,000. Cual era la frase que responda el cuervo y por que? de poema el cuervo Edgar Allan Poe In the figure alongside, show that angle(a+b+c+d) = 4 right angles AYUDA DOY CORONA, DEBO ENTREGARLA HOY A LAS 6:00 P.MNecesito descomponer este prrafoUn presente se olvid del pasadoPero pronto Cali empez a verse como un gigante que expanda sus tentculos sin control, se vio henchido y sometido por sus propias fuerzas. En un abrir y cerrar de ojos, entre 1933 y 1958, aument cinco veces su poblacin. Los defensores de la ciudad de hierro no previeron la marea de inmigrantes que llegaron a recorrer las calles y a trabajar en las fbricas. La ciudad en expansin se sali de las manos de sus administradores. Aqu y all se extendan invasiones, barrios piratas y barrios clandestinos. Algunos bordearon la zona del ro y en pocas de invierno sufrieron inundaciones.Urbanizaciones piratas vendieron lotes en tierras inestables sin suministro de agua ni alcantarillado. El crecimiento desmedido de la ciudad de hierro desbord la capacidad de la vieja Cali. El precio del suelo se elev y quienes no podan comprar tierra se fueron a vivir a las altas pendientes del occidente, cerca a las minas de carbn que explotaban para alimentar el ferrocarril. En 1953, la ciudad, constreida y rebasada, empez a buscar maneras de tomar las aguas del ro Cauca y explotar sus tierras aledaas. Para contener las inundaciones construyeron un jarilln en el oriente de la ciudad, crearon canales para la recoleccin de aguas lluvias y estaciones de bombeo.En los aos siguientes Cali continu su expansin desbordada. Miles de inmigrantes llegaban en busca de empleo, otros terminaron desplazados por la violencia en el campo y se asentaron a pelear un espacio en la gran urbe. Muchas comunidades negras llegaban desde los asentamientos del pacfico y el norte del Cauca, mientras comunidades campesinas venan desde parcelas precarias saqueadas por la violencia.Pronto las empresas debieron extender nuevas redes de acueducto y alcantarillado. Al ro Cauca empez a llegar el 70% de las aguas sucias de Cali. Todos los residuos fecales, industriales y hospitalarios vertidos a las alcantarillas desembocaban en las aguas del ro Cauca. Para mitigar el dao y explotar las tierras inundables que bordeaban el cauce, la CVC, la entidad protectora de las aguas y la contaminacin ambiental de la regin, construy un extenso canal que interceptaba los ros Lili, Melndez y Caaveralejo. Estos a su vez ya haban sido interceptados por nuevos sectores de la ciudad y usados como depsitos de desperdicios. Buscaban que los ros desembocaran sobre el canal y que en l se produjera una corriente de agua menor a la corriente natural para que los contaminantes se dispersaran tras su llegada al ro Cauca.Tambin los administradores de los servicios pblicos buscaron un lugar para arrojar las toneladas de basura que, a diario, produca la nueva ciudad de hierro. En 1967 escogieron el suroriente y sobre un antiguo cauce del ro, en una zona de humedal, dispusieron doce mil metros cuadrados, con una profundidad de veinte metros bajo el nivel del mar, para arrojar todos los desechos de la ciudad. Le llamaron el basuro de Navarro, un gigante colector de descomposicin. Jonas has gone through a whirlwind of drama in the first nineteen chapters of this novel. If he were to have written a four-stanza poem about everything happening in his life in the nineteen chapters, what would it sound like?From the novel "The Giver". 1. The speed of Sun in km/s is __________ Which of the following are examples of third party software that banks use? (Select all that apply.) A -compliance reportingB -unencrypted Microsoft Suite C -accounting softwareD -customer relationship management b) Use Greens theorem to findx^2 ydx-xy^2 dy where C is the circle x2 + y2 = 4 going counter clock wise. PEASE HELP. What are the two main sources of energy on earth? Explain some things that each source creates/powers/ does for earth. Read the passage.Clean & Green laundry detergent removes stains better than other leading laundry detergents. But Clean & Green is safe for the environment, too. So buy Clean & Green. Your clothes get clean, and the environment stays green.Which statement about this advertisement is true? Which of the following stores the operating system?O Von Neumann centerO Bluetooth centerO the cloudO random access memory find the missing side corruption is a social crime.why? The nucleus in a body cell of a fly contains 12 chromosomes.How many chromosomes are there in the nucleus of a sperm from this fly?a) 3 b) 6 c) 12 d) 24 Salary paid to Saroj by cheque Rs. 35,000 trun in negativea..She reads a book. Which equation can be used to find the length of Line segment A C?