Which OF THESE is a reason why a bird 'sings'?

a. To mark out its territory to others of its own species

b. To frighten other birds that may attack / eat it

c. To attract its food like worms and insects

d. To wake up other birds and animals

Quick

Answers

Answer 1
In my opinion is A.to mark out its territory to others of its own species

Related Questions

Need help someone knows the answer

Answers

Answer:

ITS B SOUND POLLUTION

I HOPE ITS RIGHT IF NOT THEN SORRY

HAVE A GREAT DAY :)

Answer:

option c solid waste buildup

cause mining produces sound pollution

burning produces air pollution

coal ash cause water pollution

Write a few sentences explaining whether the following theme from The Outsiders is universal: “People often struggle to fit in; they question the right way to live their lives.”

Answers

Sample Response: This theme is universal. It can apply to all people, and most people struggle with this question.

12. What group of organisms are most in danger of extinction?

those with small populations

both a and b

those with large populations that breed quickly

those that migrate or need special habitats

Answers

Answer:

Both A and B

Explanation:

Why is environmental science important?

Answers

Explanation:

it is where we live and share resources with order species

I hope this was helpful

Why are scientific journals considered a superior resource compared to other sources of scientific information?
I NEED HELP

Answers

Scientific journals are regarded as more superior due to the fact that they are peer reviewed.

What this means is that before a scientific journal would be approved for publishing, it first has to be reviewed by some experts in that scientific field.

What these peers do is to Approve the journal, make suggestion to the work, or they can decide to reject the work if they find it unsatisfactory.

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Scientific journals are generally specialized for distinct academic fields or subdisciplines, and they are the most important way of communicating research findings.

However, Scientific information is concerned with the creation, gathering, categorization, retention, retrieval, interpretation, transmission, and usage of data.

The major difference is that Scientific journals are peer reviewed while scientific information are merely gathering of information.

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You are the lucky student of a wacky professor who develops a time machine. He asks if you will test it with him. You get in and there is an immediate glitch–the date readout fails so that when you land you are not sure what era you are in. As your time machine lands, you see an unusual landscape before you. As you open the door you realize you cannot breathe. You quickly shut the door, realizing you are in the _____.
1) Archaean eon
2) Cambrian period
3) Cenozoic era
4) Mesozoic era

Answers

Answer: Option 1 is the correct answer

Archaean eon

Explanation:

You are in the Archean Eon era because the it was early in the Archean that life first appeared on Earth. The most two earlier of the formal divisions of Precambrian time (about 4.6 billion to 541 million years ago) and the period when life first formed on Earth It began about 4 billion years ago with the formation of Earth’s crust and enlongated to the begining of the Proterozoic Eon 2.5 billion years ago; the latter is the second formal division of Precambrian time.

In the Archean eon there are unsual landscapes no rocks are preserved from this stage. The earliest terrestrial materials are not rocks but minerals.

Throughout the Archean, oceanic and island arc crust was produced semi-half way.

You cannot breathe because there was no oxygen on the Earth. Oxygen was only present in compounds such as water and chemical reactions change to carbon containing molecules that form simple living cells that does not require oxygen.

What is the Defenition of Metabolism?

a
When offspring change and develop over millions of years
b
When living things change over time.
c
The flow of chemical energy in an organism.
d
When an organism produces an offspring

Answers

Answer:

c.

Explanation:

metabolism is defined as the flow of chemical energy in an organism.


It corresponds to the formula of an acid oxide and a basic oxide:

Select one:

A. P2O3 y BaO
B. Mag y N2O5
C. FeO Y SO3
D. HNO y CaO

Answers

Answer:

P2O3 y BaO

Explanation:

The oxides of the main group metals are basic in nature. They form alkaline solutions when dissolved in water. Similarly, the oxides of main group non metals form acidic solutions when dissolved in water.

P2O5 is an oxide of a main group nonmetallic element in group 15. We expect this oxide to be acidic and form acids when dissolved in water as expected from the chemistry of the group.

Also, BaO is an oxide of barium, a group two main group metal. Hence we expect this oxide to be basic in nature and form alkaline solutions.

Hydrocarbons are not very soluble in water because

the majority of their bonds are polar covalent, which repel water molecules
they contain ions, which make the entire molecule hydrophilic
they are less dense than liquid water, so they float on the surface
most of their bonds are nonpolar covalent, so they are not attracted to water

Answers

Explanation:

most of their bonds are nonpolar covalent, so they are not attracted to water

Answer:

D

Explanation:

took test

what are general characteristics of algae ?​

Answers

Answer:

1. it has not defined length..

2. it digest good in food vacoule

hlo

can we talk in comment section

Most algae are photoautotrophic and carry on photosynthesis.

Reproduction in algae occurs in both asexual and sexual forms.

During sexual reproduction, algae form differentiated sex cells that fuse to produce a diploid zygote with two sets of chromosomes.


1. If the temperature of the water increases from 5°C to 10°C, the goldfish in Population 1 would most likely

Answers

Answer:

hot water make it hard for fish to breathe

Explanation:

an increase in temperature of water will  reduced the dissolved oxygen in water and increase the metabolic rate of goldfish thus causing goldfish respiration rate

When many nucleotides link together, they form a biomolecule responsible for storing genetic information called a
Group of answer choices

protein.

nucleic acid.

retinal.

carbohydrate.

Answers

Nucleic acid, just know nucleic acid is made up of nucleotides

When many nucleotides link together, they form a biomolecule responsible for storing genetic information called nucleic acids. Thus, the correct option is B.

What are Nucleotides?

Nucleotides may be defined as the basic unit of the polynucleotide chain of nucleic acids such as DNA or RNA. Each nucleotide is composed of three components. They are as follows:

A nitrogenous base.A pentose sugar (ribose in the case of RNA, and deoxyribose in the case of DNA).A phosphate group.

Nucleotides are the monomers of nucleic acids. Each nucleotide is joined together by covalent bonds known as phosphodiester linkage. This linkage is present between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar of next nucleotide.

Therefore, nucleic acids are formed when many nucleotides link together which are responsible for storing the genetic information.

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explain the relationship between small particle aerosols and areas od dense population​

Answers

Answer:

Explanation:

distribution and population density in the research region of east China. ... Aerosol is defined as the scattered and small solid or liquid particles ...

Which option identifies ways that people positively affect Earth’s resources?

Answers

Answer:

c is the correct answer on EDGE2020

There are many ways by which humans can positively impact Earth's resources. These include reforestation, reducing pollution, protection of endangered species, and mindful use of water and attempts to replenish the water bodies, etc.

What are the earth's resources?

The resources present on earth which were not formed due to any kind of human intervention are called earth's resources or earth's natural resources. There are various natural resources found on earth.

Energy resources like petroleum and natural gas, metallic resources like iron, copper, and gold, and nonmetallic resources like granite, sandstone, etc are some of the examples of various resources found on earth.

However, due to the rise in consumerism, these resources are being overexploited by humans which have resulted in their depletion.

But, the awareness of this is spreading fast and humans have adopted various measures to prevent negative impacts and induce positive impacts on the resources of the earth.

Therefore, humans can have a positive impact on Earth's resources.

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READING TOOL Sequence of Events List in order the parts of a typical experiment that uses
scientific methodology. Use the headings in your text as a guide.

Answers

Answer:

2. Background research

3.Create a hypothesis

4.Experiment to test the hypothesis

5.Analyse the data from the experiemnt

Explanation:

2. Learn about the topic and research on what you need for the experiment.

3.Form a hypothesis in which you want to be tested.

4. Do an experiment in which it tests your hypothesis.

5. Analyst the data from the experiment and draw conclusions and decide whether it tests your theory.

Using the drop down menus, identify the structures common to all cells.

Answers

Answer:

i need the choices

Explanation:

Which type of microscope would be the best tool to use to view the surface of a bacterial cell? Why?

Answers

Answer:

Electron Microscope

Explanation:

The maximum theoretical resolution of images created by light microscopes is ultimately limited by the wavelengths of visible light. Most light microscopes can only magnify 1000×, and a few can magnify up to 1500×, but this does not begin to approach the magnifying power of an electron microscope (EM), which uses short-wavelength electron beams rather than light to increase magnification and resolution.

-The electron microscope can achieve a much greater resolution than that obtained with the light microscope because the wavelength of electrons is shorter than that of light.

An Electron microscope is the type of microscope that would be the best tool to use to view the surface of a bacterial cell.

What is a Microscope?

A microscope may be defined as an instrument that utilizes the arrangements of lenses to make an enlarged image of a small object.

An Electron microscope produces a higher resolution of bacterial cells as compared to a standard light microscope. This is because electrons possess a much shorter wavelength than visible light.

Therefore, the correct answer to this question is an Electron microscope.

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Your question is incomplete, but most probably your full question is as follows:

Which type of microscope would be the best tool to use to view the surface of a bacterial cell? Why?

Light microscopeElectron microscope.Fluorescence microscopes.

Explain how Darwin’s theory of evolution by natural selection may have led to all giraffes having long necks.

Answers

Answer:

Because this individual had a longer neck, it was able to reach food sources that other animals couldn't...

Which process must occur for a muscle to be able to relax?
ОА. .
The amount of ATP in the neuromuscular junction must increase.
OB. Myosin and actin must attach to each other.
OC.
A nerve must initiate an action potential in the muscle fiber.
OD
The concentration of calcium in the myofibril must decrease.

Answers

Answer:

D. The concentration of calcium in the myofibril must decrease.

A field of sunflowers facing the sun is an example of

Answers

Answer:

Phototropism

Explanation:

Phototropism. Although both types of movement orient plants toward a light source, heliotropism is not the same as phototropism. Phototropism is the term that describes the growth of a plant toward any light source.

Answer:

Phototropism. Although both types of movement orient plants toward a light source, heliotropism is not the same as phototropism. Phototropism is the term that describes the growth of a plant toward any light source.

Explanation:

Image result for A field of sunflowers facing the sun is an example of

Continuously facing towards the east also helps the flowers to heat up quickly. This gives them an advantage in pollination, as warm flowers attract insects. Therefore, in the plant's interest, the flower always faces the sun and is therefore always clearly visible to these important pollinators.

An object moves 100m in 5sec, Calcutta speed.
pls answer my question!​

Answers

from g00gle!
if it doesnt let you see its 44.74 mph

please answer fast
difference between fish and frog on the habitat and structure of heart

Answers

Answer:

the answer is this

Explanation:

hope this help

good luck for your homework

Question 7 of 10
A certain plant has a color that can range from green to yellow. Some plants
are very green, and some are very yellow, but most are in between. What is
most likely true about this trait?
A. The color is a Mendelian trait.
B. There are several genes that control the color.
C. There are only two alleles for color.
D. Being yellow is a recessive trait.

Answers

Answer:

B. There are several genes that control the color.

Explanation:

According to the description of the trait in this question in which the plant exhibits a wide range of colors from green to yellow, it shows that the trait for color in such plant is controlled by two or more (several) genes. This kind of inheritance is called a POLYGENIC INHERITANCE.

Polygenic inheritance is a kind of non-mendelian inheritance (does not follow the principles of Mendel) in which phenotypic traits of an organism is controlled by several genes. Each gene possess two alleles, which equally contribute to the phenotypic expression of such trait. Traits controlled by polygenes do not conform to Mendel's laws of inheritance as the offsprings exhibit a range of traits from the mixture of parental traits as stated in the question.

In polygenic inheritance, most of the offsprings exhibit the intermediate phenotype (between green and yellow) with few extremes (green and yellow) due to a combination of the genes in the parental phenotypes. Hence, based on the description in the question, there are several genes that control the color trait in the plant.

Answer: B. There are several genes that control the color.

Explanation:

i got it right on the test

The hydrosphere does not overlap with any other spheres true or false

Answers

Answer:

False

Explanation:

It overlaps with the lithosphere. Since some rocks produce water.

Answer:

False

Explanation:

Technology has affected society by causing radical changes in how people live. For example, e-mail on the computer has changed the way we communicate with the world. Describe another example of how technology has changed how people live

Answers

Answer: the modern production of the cars change the way of transportation

Modern houses change the way where people locate

Another example of how technology has changed how people live is the widespread use of smartphones and mobile applications.

Smartphones have become an integral part of daily life for many people, revolutionizing the way we communicate, access information, and carry out various tasks.

Some ways in which smartphones and mobile applications have transformed our lives:

1. Communication: Smartphones have made communication more convenient and accessible. With features like instant messaging, video calls, and social media apps, people can easily connect with others regardless of their location.

2. Information Access: Smartphones provide instant access to a vast amount of information through the internet. With a few taps on a smartphone screen, people can search for news, look up facts, find directions, or access educational resources.

3. Online Shopping: E-commerce platforms and mobile shopping apps have revolutionized the way people shop. With smartphones, individuals can browse and purchase products or services from anywhere, anytime.

These are just a few examples of how smartphones and mobile applications have significantly changed the way we live.

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We use electrical devices that produce motion, light, and sound. Which aspect of energy explains why these devices are possible?

Answers

Answer:

The suns energy or the solar energy

Explanation:

14. Brainstorm and write at least 3 potential challenges or important points to consider when conducting the described
data collection.


Answers

When conducting an experiment, there are different aspects to consider, such as the question that drives to the reseach, the hypothesis, theoretical framework, variables involved -independent, dependent, and controll-, methodology, study groups, data analisys, among others.    

In the exposed example, Pincky is lacking theoretical framework, defining which are the study groups, methodology to collect data, and a description of data analysis.

---------------------

The scientific method is a research method that consists of systematic observations, measures, experimentation, analysis, and verification of a hypothesis. It is based on two aspects: reproducibility, which is the capability of reproducing the experiment in any other place by any researcher, and refutability, which is the susceptibility to be refused.

When conducting an experiment, you need to consider,

Definition and problem statement. The question for which there is not an answer yet.

Hypothesis formulation. A hypothesis is a scientific conjecture, not verified, that requires corroboration.

Data collection and analysis. This step involves testing the observations.

Results

Verification of hypothesis. This step involves the deriving of the working hypothesis.

Discussion and Conclusion.

Previous knowledge about the study object is always required for a better understandig.  A question the investigator wants to answer. The main goal of the study, which is basically what the investigator wants to find out. The researcher makes a hypothesis to predict what is going to happen. The experiment is to be performed to answer the question. The conclusions through which the hypothesis might be rejected or accepted.

--------------

So in this experiment there must be,

Theoretical framework, such as information about the species, life stage at which they begin chirping, about external factors that might affect it or benefit it, and etcetera.

The goal: To know how temperature affects cricket´s chirping

Hypothesis: Crickets chirp less frequently under cold temperature than under warm temperature.

Variables: Temperature → Independent

                 Chirp frequency → Dependent

                 Water and food supply, light exposure, refuge → Controlled

Study groups: group of crickets exposed to a warmer temperature

                        group of crickets exposed to a colder temperature

Methodology: Individuals analyzed should be in the same development stage, or at least be sexually mature. Two groups of 10 individuals each should be placed under the same conditions, excepting for temperature. One of the groups should be exposed to warmer temperatures and the other one to lower temperatures. Chirps should be recorded for a week.

Data analysis: Using the chirps records, the frequency can be measured for each group. Results should be compared using different statistical analyses.

Results: Results should be clearly exposed, using texts, charts, and graphs.

Discussion and Conclusion: Hypothesis acceptance or rejection. Discussion about the expected results against the observed ones.

-----------------------------

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CER

Can someone help me with these questions? Thank you.

Answers

Answer:

1.C

2.E

3.C

4.R

5.E

6.R

7.E

8.C

9.E

(do not take my word for it maybe wait for someone else to answer to compare to mine)

can someone please tell me what bug this is?

Answers

Answer:

kinda looks like a cricket or grasshopper prob a cricket tho

Explanation:

Tara placed a grape in a solution, after sometime she noticed that the grape started to shrink.
a. Name the solution and explain.
b. Then Tara placed the raisin in a solution and noticed it started to swell up. Name the solution and explain

Answers

Answer:

a. Hypertonic solution

b. Hypotonic solution

Explanation:

There are basically 3 types of solutions in biology,

1) Isotonic-Same concentration of solute and solvent inside  the grape and in the solution.

2)Hypotonic solution-More concentration of solvent in the solution than in the grape.

3)Hypertonic solution-More concentration of solvent in the grape than in the solution.

Now,

a. Tara had kept the grape in a hypertonic solution. The solvent will start draining from the grape to equalize the concentrations of solvent inside and outside. So, the grape shrank due to loss of water.

b. Tara kept it in a hypotonic solution. The solvent will start entering the grape to equalize the concentrations of solvent. So, the grape started swelling.

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