Why do biologists measure the number of trophic levels in an ecosystem?
A. To find new treatments for diseases
B. To make it helpful for humans
C. To see if it has any food chains
D. To check its stability and health

Answers

Answer 1

Answer:

I think it's D

They measure the number of trophic levels to check its stability and health


Related Questions

What is the original source of energy for gasoline?
O plants
O Sun
O petroleum
O fossil fuels​

Answers

The original source is the sum

Answer:

Sun

Explanation:

The narrator calls stem cells extraordinary. Why does she use this term to describe these cells?

Answers

Answer:

Stem cells are called extraordinary by the narrator because stems cells which is mostly gotten from bone marrow is use in medicine for regeneration and repair of damaged tissues and organs. It is use to correct part of organs that is not working properly. It has been use for treatment of diseases over the years.

Explanation:

Stem cells are special human cells that have the ability to develop into some specialized cells which can be used to regenerate and repair damaged tissues and organs.

Stem cells can be use to replace tissues that has been damaged through diseases and it has been use for treatment of different type of diseases over the years.

Answer:

All cells reproduce to make new cells. However, stem cells actually form many different types of cells. Adult stem cells can also repair tissues in the body.

Explanation:

answer on edmentum.

A wave with a height of 5 feet and a wavelength of 15 feet has a wave base of __

Answers

Answer:

The answer is 7.5 feet.

Explanation:

When a wave has a height of 5 feet and a wavelength of 15 feet then it has a wave base of 7.5 feet. Wave base is equal to the half of the wavelength so if you consider your wavelength to be 15 feet then it is divided into 2 that would give you answer of 7.5 feet.

I hope I helped, please correct me if I'm wrong!

Helpp !
The nervous system interacts with the endocrine system by _
O A. translating messages from endocrine cells
O B. sending neurotransmitters to endocrine target cells
O C. sending neurotransmitters to neuroendocrine cells
D. receiving messages from hormones

Answers

Answer:

B. sending neurotransmitters to endocrine target cells

Explanation:

Your endocrine system works closely with your brain and central nervous system to control the creation of specific hormones and enzymes.

Read the article and use the information to answer the question that follows. Changing Theories Explain Lamarck's ideas about how organisms changed over time.

Answers

Answer:

Lamarck thought that organisms came into being through spontaneous generation

He thought they changed from simple organisms to more complex organisms because they had an innate drive to become more complex and perfect

Lamarck thought that when organisms changed their behaviors in response to a changing environment, their bodies changed. When they used a part of their bodies more, it changed accordingly. When they used a part of their bodies less, it shrank

Explanation:

Cuz I took the L for y’all

Answer:Lamarck thought that organisms came into being through spontaneous generation

He thought they changed from simple organisms to more complex organisms because they had an innate drive to become more complex and perfect

Lamarck thought that when organisms changed their behaviors in response to a changing environment, their bodies changed. When they used a part of their bodies more, it changed accordingly. When they used a part of their bodies less, it shrank

Explanation:

Hormone disruptors called phthalates are found in many detergents, perfumes, cosmetics, baby powders, body lotions for adults and babies, sunscreens, hair sprays, deodorants, soaps, nail polishes, shampoos for adults and babies, and the coatings on many timed-release drugs.

Your answer:


True

False

Answers

Answer:true

Explanation:

I just took the test

Which climatic zone is always hot and humid? arid, tropical wet, temperate continental, Mediterranean

Answers

Answer:tropical wet, is the anwers

Explanation:

The tropical wet climate zone is the climate zone that is consistently hot and humid. This climate zone is characterized by year-round high temperatures and high humidity, with average temperatures of 80°F (27°C) or more, and annual precipitation of 59 inches (1,500 mm) or more.

What is tropical wet climate zone?

The tropical wet climate zone is a type of climate that can be found in areas close to the equator. It is distinguished by high temperature, year-round high humidity and abundant rainfall. Equatorial climate or tropical rainforest climate are other names for this climate zone.

One of the most ecologically diverse regions on Earth is the tropical wet climate zone, which is also an important supplier of natural resources such as timber, fruits and medicinal plants. Deforestation, climate change, and other human activities also pose threats to the region, and they have the potential to have major impacts on the natural and economic systems that depend on this climate zone.

Therefore, the tropical wet climate zone is the climate zone that is consistently hot and humid.

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Select the correct answer from each drop-down menu.
The image shows the path of a ball that’s thrown.
At positions (A,B,C, or D) and (D,E,F, or G), kinetic energy is maximum. At position (B,C,D,or E), potential energy is maximum.

Answers

At position (A) and (G), kinetic energy is maximum. At Position (D), potential energy is maximum.

At point A and G kinetic energy will be maximum while Potential energy is maximum at point D.

Kinetic energy (KE) is initially provided to the ball while it is still in contact with the throwing hand. Once the ball leaves the hand there is no input of energy. As the ball rises the KE is transformed to gravitational potential energy (GPE). This GPE is effectively stored in the height of the ball.Now, when the ball falls back to the ground its potential energy is transformed into kinetic energy, which will continue increasing as it gains momentum, until it finally collides with a surface.

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Secondhand smoke only affects those who already smoke, due to increased smoke Innalati
4. (3.08 LC)
What factor best determines whether a person gets cancer? (2 points)
Maternal genes alone determine whether a peson gets cancer.
Paternal genes alone determine whether a person gets cancer.
A combination of environmental and genetic factors cause cancer.
Environmental factors alone determine whether any type of cancer occurs.

Answers

A combination of environmental and genetic factors cause cancer

The hip bone of a whale and the appendix of a human are referred to as ______because they have little current importance but were important in the
ancestors of these organisms.

A.embryological structures

B.homologous structures

C.vestigial structures

D.mystery structures

E.analogous structures

Answers

C. vestigial structures

Which of the following factors will most likely limit the light-dependent reactions of photosynthesis?

A. Light intensity and light quality
B. Temperature and light intensity
C. Carbon dioxide concentration and light quality
D. Carbon dioxide concentration and temperature

Answers

The answer is b because you need light

Answer:

C

Explanation:

Is knowing about physical and chemical changes of food important for a molecular gastronomy chef?

Answers

Answer: Yes,

Explanation:

Molecular gastronomy can be defined as a scientific discipline that involves the study of physical and chemical processes that may occur while cooking food. The chefs who are concerned with molecular gastronomy apply their scientific knowledge while cooking. They observe and experiment the change in food appearance, color and fragrance after cooking and try to improve the three parameters to attract the customers.

Write one scientific question about the organism in the photo.

Answers

Answer:

Please attach the photo of the organism.

Explanation:

Indicate whether each source is reliable or unreliable.

a goverment website
a university professor’s personal blog
a commercial website
an online peer-reviewed science journal

Answers

Yes, no, no, yes. These answers of mine are correct because government/journals have evidence sites from other sources

Answer:

Reliable

Unreliable

Unreliable

Reliable

Explanation:

Government websites use the domain suffix (.gov) which demonstrates that the information being provided is from the federal government (reliable).

Blogs are not reliable, especially if they are personal (unreliable)

While some commercial websites could be right, some can skew the truth to fit their perspective or lie for financial gain (unreliable)

Peer reviewed science journals provide studies and experiments, and use real examples (reliable)

A student made a model of an onion skin cell she viewed using a microscope. The scale is 1:500.The students cell model has a length of 15cm. How many centimeters is the real cells length?

Answers

Answer:

Length of the real cells = 7500 cm

Explanation:

A scale model is a physical representation of an object that has the same aspects as that of the object.

A scale model can be used in fields like engineering, film making,  salesmanship, etc

Length of the student's cell model = 15 cm

The scale is [tex]1:500[/tex]

So,

Length of the student's cell model / Length of the real cells  = [tex]1:500[/tex]

15 / Length of the real cells  = [tex]1:500[/tex]

Length of the real cells  = 15 × 500 = 7500 cm

Answer:

7500 cm

Explanation:

we in the same grade problem i am on this test

Many people place bat boxes on their property to provide housing that attracts insect -eating bats. Explain how this activity has a positive effect on the environment.

Answers

Answer:

Bat boxes at homes provide housing to insect-eating bats which has two major positive effects on the environment:

Bat boxes provide bats a natural habitat and they act as natural pest control in the environment. They are very helpful for reducing or controlling the population of mosquito and balance the food chain in the environment.Bat is known as very good pollinators which helps in the pollination of flowers or spread their seeds. So bat boxes at home increase pollination in nearby areas and increase biodiversity in the environment.

Hence, bat boxes at houses have a positive effect on the environment.

define the general difference between an autotroph and a heterotroph

Answers

Answer:

Explanation:

If we break down the word autotroph, auto means “self” and troph means "feeding" or nourishment. However, when we break the word heterotroph, we get hetero- meaning other, and troph meaning feeders.

This is the critical difference between these two groups. Autotrophs synthesize or make their own food whereas, heterotrophs cannot make their own food thus have to rely on others by eating or absorbing others. For example, plants are autotrophs because they can make their own food using photosynthesis, whereas, humans are heterotrophs because we have to eat others to survive.

Answer:

autotrophs  are organisms that can produce their own food from the substances around them using light or chemical energy

heterotrophs cannot synthesize their own food and rely on other organisms plants and animals for nutrition

Explanation:

WILL GIVE BRAINIEST!!Scientists use models of earthquakes to (5 points)
change their location
stop them from occurring
understand the process
increase the waves formed in the process

Answers

Answer:

C. Understand the process

Explanation:

When scientists create models of earthquakes, they are trying to learn more about them to try and keep people safe in the event that one does happen. It is practically impossible to change the location of an earthquake or stop it from occuring, since earthquakes are caused by the movement of massive continental plates. Scientists also definitely do not want to increase the waves formed in the process, as this would contribute to the damage. Therefore, the correct answer is choice C, understand the process. Hope this helps!

Scientists use models of earthquakes, so as to: C. understand the process.

What is an earthquake?

An earthquake simply refers to a sudden, natural shaking of the ground, due to movements within the Earth's crust and upper mantle (lithosphere) which typically creates seismic waves.

In order to have a better understanding of the features of an earthquake and the processes that are associated with, scientists generally use models of earthquake.

In conclusion, earthquake models are simulations which can be used by scientists to better understand the process.

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If there are 10 chromosomes in a particular cell at the start of prophase. How many will be present in the same cell after cytokinesis has occurred? Explain why you think so?

Answers

Answer:

10

Explanation:

assuming it goes through mitosis, the chromosomes are doubled and during mitosis the sister chromosomes are separated so the daughter cell has 10 chromosomes

What kind of banded rock is formed by cavities in rocks left by gas bubbles?

A. Fossils
B. Marble
C. Agates

Answers

I believe this is agates I’m not quite sure though
agates
hope this is correct :)

Identify the large brown tectonic plate and whether it is oceanic or continental

Answers

Option and image is not provided in the question. So the image is attached below and complete question is as following:

Identify the large brown tectonic plate and whether it is oceanic or continental?

A. Eurasian, continental B. South American, oceanic C. African, oceanic D. North American, continental

Answer:

D. North American, continental

Explanation:

Tectonic plates are defined as the region or area of the Earth's crust and uppermost mantle, that is present far below the sea around the world.

The given image shows that  the large brown tectonic plate is North America and it is continental plate because it lie under surface land masses.

Hence, the correct answer is D. North American, continental .

Answer:

The answer is D because the plate is not touching the water and is the north American

Explanation:

Help me answer these photosynthesis and cell respiration

Answers

The commas (,) I used separate the 2 processes

No,yes
Yes,no
Chloroplasts, mitochondrion
Yes, no
Carbon dioxide +water(in the presence of sunlight energy),
Oxygen and glucose
Oxygen +glucose +energy, carbon dioxide + water
Carbon dioxide is used up(photosynthesis), carbon dioxide is produced(respiration)
Light energy, glucose
Released, captured

PHOTOSYNTHESIS
Light energy
CO2+ H2O (——————-> O2+C6H12O6

RESPIRATION
O2+C6H12O6——————> CO2+H2O

what did the results of the experiment show​

Answers

What experimemt is it?

Energy Distribution provides utilities, which are
career advancement opportunities.
services provided to people and organizations.
materials provided to people and organizations.
products for commercial consumption first.

Answers

Answer:

services provided to people and organizations

Energy Distribution provides utilities, which are products for commercial consumption first.

How Energy Distribution provide utilities?

The most common media used to distribute energy are steam, air, hydronics and electricity.

These form of media creates products like electric power that offer services and career advancement opportunities.

Whereas hydronics provides utilities to people and organizations.

Hence Energy Distribution provide utilities to products for commercial consumption first.

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L 2.2.4 Quiz: Translation
Which amino acid chain will be formed by the codons shown below?
GUC CUU CCG
Messenger
Second base in codon
RNA Codons U
c
A
G
UUU UCU UAU UGU
UUC)
Phe
UCC UAC
}Tyr
UGC)
Cys
с
U
Ser
UUA
Leu
UCA
UAA Stop UGA Stop A
UUG UCG
UAG Stop UGG Trp G
CUU CCU CAU CGU
U
CUC CCC
His
CAC CGC
Leu Pro
CUA CCA CAA
Gin
CGA
CUG CCG CAG CGG
AUU ACU AAU
Asn
AGU
AUC
Ser
lle ACC AAC) AGC
A
Thr
AUA ACA AAA
AUGStart Me ACG
Lys
AGA
AAG) AGG
Arg
GUU GCU GAU GGU
GUC GCC
Asp
GAC, GGC
G
Val
с
Ala
GUA GCA GAA
Gly
Glu
GGA
GUG GCG GAG) GGG
Arg
First base in codon
POCO POCO POCO 20co
Third base in codon
O A. Leu His Ser
O B. Val Leu Pro
O C. Pro Val Pro
O D. Val Pro Pro

Answers

Answer:

uuu ucu uau ugu uuc) phe ucc uac }tyr ugc) cys

Answer:

The answer is Val Leu Pro

An experiment was designed to investigate the effect of caffeine on the rate of the
heartbeat of fruit flies. Two populations of fruit flies were grown in a lab. Both
populations were raised drinking the same type of water and the same type of food.
Both populations were exposed to the same amount of light and regulated
temperature at 20 degrees Celsius. The fruit flies' heartbeats were then monitored
at two hour intervals. The fruit flies of population one were given caffeine five
minutes before their heartbeat was checked. The fruit flies of population two
were not given any caffeine.



what is the control variable
what is the expirimental group
what is the independent variable
Name a controlled variable or constant
was quantitive or qualitative data collected ​

Answers

Control - The ones not given caffeine
Experimental - The ones given caffeine
Independent - Addition of caffeine
Constant - Light
Data - Quantitive

Which two hypotheses can be supported with quantitative data?

Answers

Answer:

People who eat low-protein diets are more likely to have less muscle mass.

Eating less salt lowers blood pressure over time.

Why anaerobic respiration is rapid than aerobic respiration​

Answers

Answer:

The amount of pressure that is released.

Explanations:

Aerobic respiration is known as a major advantage, base of the amount of energy it releases. Aerobic respiration releases more energy than anaerobic respiration, causing it to become more rapid.

Answer:

Anaerobic respiration is a shorter process than aerobic respiration so a complete cycle of anaerobic respiration is shorter than one of aerobic respiration.

Explanation:

Aerobic respiration involves three stages: glycolysis (the breakdown of glucose into pyruvate), the Krebs cycle (the breakdown of pyruvate into carbon dioxide and hydrogen), and the electron transport chain (hydrogen produced in the Krebs cycle bonding to oxygen to form water).

On the other hand, anaerobic respiration has fewer stages. Anaerobic means 'without oxygen', and so the process takes place without needing any oxygen. In anaerobic respiration, glucose is broken down into pyruvate, just like in aerobic respiration, however due to the lack of oxygen, that pyruvate is broken down into either lactic acid (e.g. in humans), or ethanol (e.g. in yeast). This process is called fermentation, and it doesn't take as long as the Krebs cycle and the electron transport chain, so that's why anaerobic respiration is more rapid than aerobic respiration.

Which of the following means a hormone that aids in growth of gonads?
Glycogenesis
Thyrotoxic
Pancreatitis
Gonadotropin

Answers

Answer:

thyrootoxic

Explanation:

The hormone which aids in the growth of gonads  is Gonadotropin. The correct option is gonadotropin.

Gonadotropins are  defined as the hormones which  play an important  role in the growth and development of gonads. The gonads refer to the male and female reproductive organs, such as the testes and ovaries. Gonadotropins stimulate the production of sex hormones and even  regulate the reproductive processes. These homones are essential for the normal functioning of the reproductive system.

Gonadotropins are  classified as glycoprotein hormones  which are secreted by gonadotropic cells of the anterior pituitary which is present in vertebrates.This family includes the mammalian hormones follicle-stimulating hormone (FSH) and luteinizing hormone (LH), the chorionic gonadotropins, human chorionic gonadotropin (hCG) and equine chorionic gonadotropin (eCG),as well as at least two forms of fish gonadotropins.

Thus, the correct option is gonadotropin.

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10. Which describes products that help people meet needs or solve problems?
models
feedback
.
technology
science

Answers

Science because there is a reason behind everything

Design     models ig idk

(◕‿◕✿)

Other Questions
Context is ______. a- anything beyond the specific words of a literary work that may be relevant to understanding the meaning of a text. b- anything that may be relevant to understanding the meaning of a text, except history and biographyc-limited to the words of a literary work that are relevant to understanding the meaning of a textd-limited to the historical facts of a text Find the age ttt of a sample, if the total mass of carbon in the sample is mcmcm_c, the activity of the sample is AAA, the current ratio of the mass of 14 6C 614C to the total mass of carbon in the atmosphere is rrr, and the decay constant of 14 6C 614C is lambda. Assume that, at any time, 14 6C 614C is a negligible fraction of the total mass of carbon and that the measured activity of the sample is purely due to 14 6C 614C. Also assume that the ratio of mass of 14 6C 614C to total carbon mass in the atmosphere (the source of the carbon in the sample) is the same at present and on the day when the number of 14 6C 614C atoms in the sample was set. Express your answer in terms of the mass mamam_a of a 14 6C 614C atom, mcmcm_c, AAA, rrr, and lambda. View Available Hint(s) The standard free energy change, G', for this reaction is +6.7 kJ/mol. However, the observed free energy change (G) for this reaction in pig heart mitochondria is +0.8 kJ/mol. What is the ratio of [isocitrate]/[citrate] in these mitochondria at 25.0 C? On January 1, 20X1, Draper Inc. signed a five-year noncancelable lease with Thornhill Company for custom-made equipment. The lease calls for five payments of $161,364.70 to be made at the beginning of each year. The leased asset has a fair value of $900,000 on January 1, 20X1. There is no bargain purchase option, and ownership of the leased asset reverts to Thornhill at the lease end. 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