chúng ta cần làm gì để bảo vệ môi trường sống không còn tác nhân đột biến?

Answers

Answer 1
Fjdyc jesjnehfiejshwjqbdh jevdjedn

Related Questions

Hi, I learned that an Knight anole is a invasive species in Florida. There is one on my humming bird feeder. Is it alright to leave it alone and let it drink the honey or are they too much of a threat to Florida?

Answers

Answer:

they pose a serious threat to the diversity of native lizards and birds.

Explanation:

Summarize active transport In your answer consider the direction of transport and any external
energy or special structures that are needed in the process .

Answers

Answer:

an area of lower concentration to an area of higher concentration.

ATP

Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.

the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plant

membrane pumps (such as the sodium-potassium pump) and vesicle transport.

Primary Active Transport.

The Cycle of the Sodium-Potassium Pump.

Generation of a Membrane Potential from the Sodium-Potassium Pump.

Secondary Active Transport.

Sodium Potassium Pump.

Endocytosis.

Exocytosis.

Active Transport.

Explanation:

Moving substances across a cell membrane against their concentration gradient, from an area of lower concentration to a region of greater concentration, is a process known as active transport in cells.

Thus, Active transport uses external energy—typically in the form of ATP (adenosine triphosphate)—to move materials against the concentration gradient as opposed to passive transport, which depends on the natural movement of particles.

Active transport involves the movement of materials across the cell membrane by means of specific membrane proteins called carrier proteins or pumps.

Thus, Moving substances across a cell membrane against their concentration gradient, from an area of lower concentration to a region of greater concentration, is a process known as active transport in cells.

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when does crossing over occur? how many chromatids are involved? how many homologous chromosomes?

Answers

Answer:

The normal human karyotype is made up of 46 chromosomes: ... The 2 sister chromatids are linked mainly by a paracentric heterochromatin ...

Explanation:

Which equation best models cellular respiration? (1 point)
o 6H20 + 6CO2- C6H12O6 + 602 + Energy
O C6H12O6 + 602 6H20 + 6CO2 + Energy
O 6H20 + 6CO2 + Energy – C6H12O6 + 602
O C6H12O6 + 602 +6CO2-6H20 + Energy

Answers

The equation best models cellular respiration is: C6H12O6 + 602 = 6H20 + 6CO2 + Energy

CELLULAR RESPIRATION:

Cellular respiration is the process by which living organisms obtain energy by breaking down food molecules.

Cellular respiration can occur in the presence of oxygen (aerobic) and this combines glucose molecule to form carbon dioxide (CO2) and water (H2O) and release energy for use.

The general equation for cellular respiration is as follows:

C6H12O6 + 602 = 6H20 + 6CO2 + Energy

Therefore, the equation best models cellular respiration is: C6H12O6 + 602 = 6H20 + 6CO2 + Energy (ATP).

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Answer:

For connexus students: Cell Work Unit Test

Explanation:

1. 12

2. Chlorophyll breaks down because there's less sunlight.

3. The Calvin-Cycle is light independent (does not need sunlight)

4. light

5. C6 H12 O6 + 6O2 + 6H2O + energy

6. Pyruvic Acid+ NADH --> Lactic Acid+ NAD+

7. Acetyl-CoA joins with a large molecule called oxaloacetic acid

8.Electrolosis

9. ATP

10. Krebs Cycle

11. Oxygen

12. 12

13. Ectotherms cannot insulate- and can only control their body temperature by choice.

14. Shivering

the exchange of gases within the cells of the body is known as

Answers

Explanation:

The exchange of gases between the blood and tissue cells is internal respiration. Finally, the cells utilize the oxygen for their specific activities: this is called cellular metabolism, or cellular respiration. Together, these activities constitute respiration.

internal respiration.

The light-dependent reaction should happen before the Calvin cycle because ________.

Select one:

a. its products are important to the fixation of carbon dioxide.
b. plants are more active during the day than at night.
c. photosynthesis happens faster when there is sunlight.
d. more products are produced during the day than at night.

Answers

ANSWER:

A.

BECAUSE THE LIGHT DEPENDENT REACTION SHOULD HAPPEN BEFORE THE CAL-VIN CYCLE.

HOPE IT HELPScan you brainlest me
great !! And I don’t know my bad

All organisms interact with and depend upon each other and their environment to satisfy their basic needs. Relationships between organisms include predation, competition, and symbiosis. Consider the food web. Select ALL of the relationships that exhibit competition for resources.

Answers

Answer:

Explanation:

Relationships in the food web that show competition for resources include:

Herbivores competing for producers. Carnivores competing for herbivores. Carnivores competing for other carnivores.

What are some examples of competition in the food web?

Competition in the food web involves organisms of different species trying to use the same resource.

A herbivore such as a cow competing with another herbivore such as a goat, to eat grass (producer) shows competition.

Leopards and Cheetahs competing for a rabbit shows carnivores competing for herbivores.

Then carnivores and omnivores such as lions and humans can compete for other carnivores as well such as jackals.

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What is the charge for all of the elements in Group 1?

Answers

Hiii i believe it is a +1 charge

hazards to humans that come into contact with it,
4. Study the graphs in the stimulus. Order the events that occurred at the Bodega Bay study
site, where scientists used traps to catch and count samples of marine organisms, from
1to 5. Write a 1 by the first event to occur and a 5 by the last event.
5 The number of native clams per sample falls from 100 to 10.
1 Scientists find European Green Crabs in Bodega Bay.
4 Scientists find that the number of native clams per sample has risen to 40.
3 The number of native shore crabs per sample falls from 25 to 20.
2 The number of European Green Crabs per sample falls from 5 to 4.

Answers

Number 1 to 5 which would be that then answer

Compare and contrast Eubacteria and Archaebacteria.

Answers

Answer:

Archaea is a single-celled bacterium that thrives in severe circumstances, whereas Eubacteria lives and flourishes in normal settings. Archaea is the earliest bacterial species yet discovered, dating back to the formation of the world.

TWO predator adaptations used to help them capture their prey are *
camouflage
outrunning prey
mimicry
fleeing

Answers

Answer:

Under the pressure of natural selection, predators have evolved a variety of physical adaptations for detecting, catching, killing, and digesting prey. These include speed, agility, stealth, sharp senses, claws, teeth, filters, and suitable digestive systems.

Explanation:

hope this helps mah dude.

how does your body acquire the oxygen the cells in your body need to function?

Answers

Answer:

You take in oxygen and it goes to your lungs. It spreads through your body, going through your bloodstream, and going to your heart. The excess oxygen turns into carbon dioxide leaves through your mouth. When it leaves, the plants take the carbon dioxide and turn it back into oxygen, and repeating this process.

(I'm pretty sure this is the answer. Hope it helps:)

Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.

What are the functions of hemoglobin?

Hemoglobin is a protein in your red blood cells that carries oxygen to your body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs.

Hemoglobin, abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein present in red blood cells of almost all vertebrates as well as the tissues of some invertebrates. Hemoglobin in blood carries oxygen from the respiratory organs to the rest of the body.

Hemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues. Myoglobin, in muscle cells, accepts, stores, transports and releases oxygen.

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Question 9
Which is a negative impact of destroying the rainforests?

Answers

The Animals woud be hurt

Explanation:

The environment would be bad to be destroyed for the animals in the rainforest.

loss of habitat, increased greenhouse gases, water un the atmosphere, soil erosion and flooding, destruction of homelands

Design a controlled experiment to determine the effect of hot, dry air on head lice. In your experimental design, be sure to:
• state the hypothesis to be tested in the experiment [1]
• state one way the control group will be treated differently from the experimental group [1]
• state one result of the experiment that would support the hypothesis [1]​

Answers

An experiment is carried out to answer a question. The hypothesis predicts what is expected to occur. Experimental and control groups are compared to analyze the results, supporting or not the hypothesis.

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

BACKGROUND

When people are infested with head lice, it is recommended to wash their cloth and dry it with hot air over 53 or 54ºC for 5-30 minutes.

Head lice and eggs seem to die when exposed to those conditions by getting dehydrated.

SITUATION

We will assume that we work in a primary school and that students from the 3rth grade are being affected by this parasite.

We want to know if applying hot air to these students before entering the class will make a difference and help to control this problem.

So, we will propose an experiment to answer this question.

HYPOTHESIS

A hypothesis is a conjecture. A researcher hypothesizes to predict what is going on or what is expected to occur. The hypothesis is a claim of how it works a relation between two or more variables. Usually, it is written in the present time.

Hypothesis ⇒ Applying hot air to students' heads kills the head lice that students are carrying.

To evaluate the effect of hot air, we need to keep control of as many other variables as possible.

To do so, we asked students' families not to use other treatments on students' heads and to bathe them daily.

In this way, we were sure that all students

were equally affected by the parasite, took showers every day, and neither was using any other product that could affect the results.

Our population was the 3rth grade students ⇒ 64 children ⇒ 30 girls + 34 boys.

Before the experiment, we separated the 3rth grade into two groups.

Group A ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Experimental groupGroup B ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Control group

→  Treatment

Each student from group A received hot air every day for one week before entering the class.

Hot air was 53ºC and was applied for 5 minutes.

→  Control

Each student from group B did not receive the treatment for one week before entering the class.

CONTROL GROUP

The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.

Individuals of the control group are selected from the same population as the treatment group.

***  These two groups are identical in all aspects except for the independent variable, which changes in the treatment group but remains constant in the control group.  ***

The control group is Group B. The only difference between the control and the experimental group is that the first one did not receive the treatment. Every other aspect was equal for both groups.

The only way the control group was treated differently from the experimental group was that the control group did not received the treatment, while the experimental group did.

RESULTS

After one week, groups were compared to see if the hot air was effective in killing head lice.

When comparing the control and the experimental group, we could see that students from group A were free of parasites.

Students from group B were still affected by the head lice.

CONCLUSION

The results support the hypothesis. Hot air turned to be a great treatment for lice control.

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

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¿Cuáles son los factores biológicos o vivos que afectan a un ecosistema?

Answers

Answer:

true

it have later than 1234567

Answer:

Translate

Explanation:

Which statement is a hypothesis that would best address the question "Are rainbow trout eating all the macroinvertebrates in streams and starving out other fish species?" If rainbow trout are eating all the macroinvertebrates, then keeping rainbow trout out of new river habitats will allow native species to recover. If rainbow trout are eating all the macroinvertebrates, then introducing them to other streams will help native species recover. Rainbow trout will eat a variety of macroinvertebrates and native fish species. Rainbow trout hunt and prey upon native fish species.

Answers

A possible hypothesis here is; "If rainbow trout are eating all the macroinvertebrates, then keeping rainbow trout out of new river habitats will allow native species to recover."

A hypothesis is a statement that is tentatively put forward to explain an observation. Usually, a hypothesis is an if .... then statement. This is one of the first things that we must look out for when considering each of the statements.

Since we have observed that rainbow trout eating all the macroinvertebrates in streams and starving out other fish species, it follows that  keeping rainbow trout out of new river habitats will allow native species to recover."

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viruses are not considered living organisms because they are not composed of:

Answers

Answer:

Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things

Explanation:

Answer:Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.

PLEASE HELP DUE TODAY NO LINKS WILL REPORT AND IF COULD ADD EXPLANATION THAT WOULD HELP

Answers

Answer:

24 sq meters

Explanation:

4 times 6 is 24

Answer: Try 24m^2 so just type in answer box “2”

Explanation:

If you like this answer please give brainleist and rating! Hope this helps!^_^

Select the statement that is true.
A. DNA has the sugar deoxyribose, while RNA has the sugar ribose
B. Thymine is only present in DNA, while cytosine is only present in RNA
C. DNA and RNA are both double-stranded
D. Translation copies DNA to mRNA, while transcription coverts mRNA into proteins

Answers

Answer:

C. DNA and RNA are both double-stranded

Explanation:

This is the only one that is true.

PLEASE HELP WITH THESE QUESTIONS!!! ALSO NO LINKS PLEASE THEY DONT LET ME VIEW THEM!!!

1. Which choice shows functions of proteins in living organisms?

A.) Store the genetic code and give support

B.) Structure and support

C.) Immediate and stored energy

D.) Store energy and the genetic code


2. Which choice best describes a long chain of amino acids?

A.) Polypeptide

B.) Peptide

C.) Nucleic acid

D.) Disaccharide


3. What could cause a change in the shape of a red blood cell that would affect its function?

A.) A change in the quaternary structure of the protein hemoglobin

B.) A change in the primary structure of the protein hemoglobin

C.) A change in the secondary structure of the protein hemoglobin

D.) A change in the tertiary structure of the protein hemoglobin

Answers

Answer:

1.C. 2.A. 3.B

Explanation:

Hope it helped you brainiest pls and thank you have a great day!!!!1

Proteins help Store energy and the genetic code. The long chain of amino acids describes the long chain of polypeptides.

What is protein?

Proteins are among the most prevalent organic molecules in biological systems and have a much wider range of structural and functional variations. Many thousands of proteins, each serving a different purpose, can be found in a single cell.

All proteins are composed of one or more chains of amino acids, despite the fact that their structures and activities differ substantially from one another.

In biological reactions, enzymes function as catalysts, accelerating the reactions. Each enzyme may distinguish between one or more substrates, or the molecules that act as the catalysts for the reactions they catalyze.

Therefore, Proteins help Store energy and the genetic code. The long chain of amino acids describes the long chain of polypeptides.

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"Good science" is based on evidence, and results are able to be repeated. *

True

False

Answers

Answer:true

Explanation:

true
explanation: looked it up

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Known as the 'Pine Tree State; Maine's state tree is the Eastern white pine. Consider the model. Cärbon dioxide, water, and sunlight
are reactants of photosynthesis and are used to produce glucose and release water as a byproduct. What advantage does the pine tree
have in performing photosynthesis compared to deciduous trees such as oak or maple?
34)
A) Pine trees need less water to do photosynthesis.
B) Pine trees produce twice as much glucose as deciduous trees.
C) Pine trees do not lose their leaves and can photosynthesize all year.
D) Pine trees get more sunlight than oak trees due to their darker color.

Answers

Answer:

C) Pine trees do not lose their leaves and can photosynthesize all year.

Explanation:

In cold-temperate and Arctic regions, however, evergreens are typically cone-bearing shrubs or trees (conifers), such as pines and firs. Many tropical species of broad-leaved blooming plants are evergreen. Thus, option C is correct.

What are features of pine trees?

Pine trees may photosynthesize in the winter because they retain their needles all year long! Compared to trees that lose their leaves, this is a significant advantage.

Their leaves therefore stay green and stay attached for a longer period of time than their deciduous counterparts because they can preserve more water.

However, because of their tiny surface area, needles are not as effective at absorbing the sun's energy.

Therefore, Pine trees do not lose their leaves and can photosynthesize all year.

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List the following events in the order they occur: _____ a. The motor end plate is depolarized. _____ by. The sarcomeres contract. _____ c. Acetyl choline is released from the axon terminal into the synaptic cleft. _____ d. The depolarization triggers an action potential which propagates along the sarcolemma and the T tubules. _____ e. An action potential arrives at the axon terminal

Answers

The answer is what follows:

-An action potential arrives at the axon terminal.

-Acetyl choline is released from the axon terminal into the synaptic cleft.

-The motor end plate is depolarized.

-The depolarized triggers an action potential with propagates along the sarcolemma and the T tubules.

-The sarcomeres contract.

During the winter, a homeowner places a heavy cloth curtain across the stairwell leading upstairs from the main rooms. Which is the best explanation of the reason she does this?

A.
She wishes to place a radiating surface across the stairwell to help keep the area warm.
B.
She wishes to prevent the stairwell walls from drawing thermal energy away from downstairs by conduction.
C.
She wishes to keep hot air from downstairs from flowing up the stairwell by convection.
D.
She wishes to keep hot air from upstairs from flowing down the stairwell by convection.

Answers

Answer:

D.

She wishes to keep hot air from upstairs from flowing down the stairwell by convection

The volume (V) of a cylinder can be determined by using the formula
V = ar?h,
where r = the radius of the base, and h = the height of the cylinder. What is the result
of solving this equation for r?

Answers

Answer:

Explanation:

To solve for r, simply means to isolate the variable:

[tex]V = pi*r^2*h\\[/tex]

The inverse of multiplication is division, so divide both sides by pi and h

[tex]\frac{V}{pi*h} = r^2[/tex]

[tex]r = \sqrt\frac{V}{pi*h}[/tex]

In single celled organisms what are the materials primarily stored in?

Answers

Answer:

In single-celled organisms, materials are stored primarily in. ribosomes.

Mistletoe is a plant that lives on the branches of trees. The mistletoe plant sends its roots in through the bark of trees and takes away water and minerals that the tree needs.

Explanation:

Which of the following organelles houses DNA in eukaryotic cells?

Question 12 options:

Nucleus

Mitochondria

Golgi apparatus

Endoplasmic reticulum

Answers

Answer:

The nucleus

Explanation:

The nucleus is the most conspicuous organelle found in a eukaryotic cell. It houses the cell's chromosomes and is the place where almost all DNA replication and RNA synthesis occurs. The nucleus is spheroid in shape and separated from the cytoplasm by a membrane called the nuclear envelope.

what forms after the glycosidic linkage reaction between glucose and galactose is complete

Answers

What forms after the glycosidic linkage reaction between glucose and galactose is complete would be lactose.

Glucose and galactose are known as simple sugars or monosaccharides. Monosaccharides can combine together to form disaccharides or even polysaccharides.The combination of monosaccharides to form di or polysaccharides happens by a process known as condensation reaction.The condensation reaction results in the formation of glycosidic linkage or bond and elimination of water moleculesGlycosidic bond is a type of covalent bond th joins one sugar molecule to another sugar or non sugar molecule.

Thus, lactose is a dissacharide consisting of one glucose and one galactose unit which combine together by condensation and formation of glycosidic bond with elimination of water.

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Answer:

Water and lactose.

Explanation:

Glucose and galactose combine via glycoside linkage, forming lactose and water. Lactose is a sugar mostly found in milk.

which area of the brain is responsible for many of our circadian rhythms including sleep?

Answers

Answer:

Hypothalamus

Explanation:

It is found in the forebrain

HELP ASAP!!!!
The diagram below shows a cell placed in a solution.


A cell is shown placed inside a beaker. It is labeled Cell. The solution inside the beaker is labeled 2 percent salt solution and the solution inside the cell is labeled 4 percent salt solution.


What will most likely happen to the cell?


It will expand as water moves out of it.

It will shrink as water moves out of it.

It will expand as water moves into it.

It will shrink as water moves into it.

Answers

Answer:

It will expand as water moves into it.

Explanation:

Answer:

D.It shrink as water moves into it

Explanation:

I HOPE THIS HELPS!!!!

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HELP ASAP. A cargo plane and a private jet leave at the same time from the same airport traveling in opposite directions. The jet travels at twice the speed of the cargo plane. They are 2,400 miles apart in 4 hours. Find the speed of the cargo plane and the jet plane. ////////////////Rate Time DistanceCargo ___________________________Jet A certain whale can eat up to 2,400 pounds of food in a day. Which of the following best represents an estimate of the pounds the whale can eat in a day?A. 2 x 10B. 3 x 10C. 2 x 10D. 3 x 10Daily Question For Fun!!! Study the list of events in the history of Rome.80 CE The Colosseum was built.395 CE Rome split into two empires.509 BCE Rome became a republic.44 BCE Caesar was assassinated.753 BCE Rome was founded.64 CE Much of Rome burned.Which event would appear first on a time line?A) Rome was founded.B) Much of Rome burned.C) The Colosseum was built.D)Rome split into two empires.RIGHT ANSWERS ONLY. PLEASE What were three reasons for starting the colonies in the New World?the need for a Northwest Passagethe need for a Northwest Passagea desire for adventurea desire for adventureto escape religious persecutionto escape religious persecutionpoor people needed helppoor people needed helpa desire for profita desire for profit Please help me help please help What is the number for pi? Which sentence best shows the differenceamong classes in ancient Egypt?O All people wore clothing when they died.O All people were given a funeral ceremony.O Some people used oil of cedar as part of their burialrituals.O Some people could afford special procedures when theydied. A passenger train leaves the train station 5 hours after a freight train left the same station. The freight train is traveling 30 mph slower than the passenger train. Which equation helps to find the rate of each train, if the passenger train overtakes the freight train in three hours.3r = 5(r - 30)3r = 8(r - 30)3r = 8(r + 30)5r = 3(r - 30) What happened to the tragedian (actor) that Edna was in love with in the Awakening? Find the value of 4b for b = 1/2. What is a difference between how ants and elephants primarily use grouping for survival? PLEASSSWEEEE What is the slope y, equals, x, plus, 5? What are the things that you look for in a doctor?Name at least 5 of them Solve each compound inequality -10-2v 2. What are core elections? How are they represented in the shorthand electron configurations? 6 + blank = 4 what is the blank part Please show work if needed if not then just answer!:) Imagine that you are a U.S. ambassador to one of the following countries:Venezuela, Armenia, New Zealand, Algeria, or Kenya. Write the name of thecountry below. What size resistor would produce a current flow of 5 Amps with a battery voltage of 12.6 volts Joyce and Linda are identical twins who are 50 years old and enjoy exercising daily. Joyce avoids eating any dairy or animal products and eats granola made with canola oil for breakfast. Linda prefers rich foods, and eats bacon, eggs, and buttered toast each morning. Which statement describes a logical inference that can be made from the provided information?