The chemical bond that connects nitrogenous bases like adenine and thymine is hydrogen bond.
What holds nitrogenous bases in a DNA molecule?DNA is a double stranded molecule made up of monomers called nucleotides.
Each nucleotide subunit is composed of three major components:
Nitrogenous basesFive-carbon sugarPhosphate groupThe nitrogenous bases, which are four in number, are held together in the DNA molecule by hydrogen bonds. That is; Adenine and Thymine are held together by hydrogen bonds.
Therefore, the chemical bond that connects nitrogenous bases like adenine and thymine is hydrogen bond.
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Answer:
b
Explanation:
4) A hypothetical bacterium swims among human intestinal contents until it finds a
suitable location on the intestinal lining. It adheres to the intestinal lining using a feature
that also protects it from phagocytes, bacteriophages, and dehydration. Fecal matter from
a human in whose intestine this bacterium lives can spread the bacterium, even after
being mixed with water and boiled. The bacterium is not susceptible to the penicillin
family of antibiotics. It contains no plasmids and relatively little peptidoglycan. The cell
also lacks F factors and F plasmids. Which of the following statements about the bacteria
is most probably accurate?
A) The bacterium cannot donate DNA through conjugation with another cell.
B) The bacterium cannot take up DNA from its external environment.
C) The bacterium cannot form an endospore.
D) The bacterium cannot reproduce.
Complete the sentence. Fracking collects _________ that forms when organic matter is compressed under great temperature and pressure.
coal
crude oil
water vapor
natural gas
Answer:
the answer is natural gas :)
Explanation:
Petroleum and natural gas are formed from compressed organic matter
Use the data and what you have learned about evolution to explain how mutation is a random process, but natural selection is not random.
The data are not found here, but evolution means 'descendence with modification', which may occur due to natural selection and mutations.
What is evolution?Evolution is descendence with modification, which generally is caused by a process called natural selection.
Natural selection 'selects' the most adaptive variants in the population, which occurs due to the emergence of mutations.
A mutation is any genetic change in the nucleotide sequence of the genome of an individual.
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Which organism doesn't
photosynthesize?
A. some bacteria
B. plants
C. algae
D. fungi
Answer:
D. Fungi
Explanation:
Fungi does not contain the green pigment chlorophyll and therefore are incapable of photosynthesis.
why donation should be encouraged
Answer:
Donations should be encouraged to help needy peoples and build a better society. Donations also show the kidness of individual. Donating small amount also may save someones life and health. This is why donations should be encouraged to save the society.
what is difference about the outermost boundary in a plant cell compared to an animal cell?
Answer:
Cell wall: plant cells have a cellulosic cell wall, which is absent in the case of animal cells. The plasma membrane serves as the outermost boundary for an animal cell
Outline seven soil pollutants and state two effects of each of this seven soil pollutants.
[tex]\bold{\huge{\underline{ Answer }}}[/tex]
Soil pollutants are substances which contaminates the soil. Soil pollutants are very harmful substances ,they makes the soil toxic . The presence of these substances in higher concentration directly affects the ecosystem, earth etc.
Here are some major soil pollutants :-1) Industrial wastes
Industrial wastes are the common soil pollutants. The discharge of industrial waste in the soil makes it very toxic and directly affects the growth of plants (agriculture) .Industrial waste also affects the life of some organisms like earth worms which makes the soil more fertile.2) Pesticides
Pesticides are the substances which are generally used to kill the pestes. It includes Insecticides, herbicides and fungicides. The higher concentration of pesticides in cropfield directly affects the human health and responsible for soil pollution, water pollution etc.3) Hydrocarbons
Hydrocarbons are the substances which are composed of hydrogen and carbon. Only some hydrocarbons are responsible for soil pollution as they are very harmful for living organisms. for example the most harmful hydrocarbons is PAHs ( Polycyclic aromatic hydrocarbons) .PAHs in soil affects the growth of plants and it is indirectly responsible for the cancer in humans.4) Metals
Most of the people don't know that the higher concentration of some metals makes the soil very toxic . The concentration of these metals in soil directly kills the human beings and other living organisms.5) Non - biodegradable substances
Most people throw the trash in the soil even they know that soil can't degrade the non - biodegradable substances. When these non - biodegradable wastes eaten by street animals it directly affects the health of those animals and disturbs the ecosystem.6) Human activities
Some people really don't care about the environment. They always do ,what they want to do without even thinking about its consequences on the environment. They throw Cigrattes in the soil, Drop alcohol in soil .These activities makes the soil toxic and the crops that are grown in contaminated soil directly affects the human health.7) Acid rain
It is major reason for the contamination of soil. Some people thought that, It is the natural cause of soil pollution but that's not the reality. Humans are the one's who are responsible for acid rain. Contamination of these acids makes the soil very toxic that it kills the plants on the spot.Answer:
See below.
Explanation:
1) Plastic / Glass:
● Non biodegradable substances & takes a long time to decompose.
● Harmful substances are released into the soil.
2) Acid rain:
● Changes the acid level of the soil.
● Causes harm to the plants, insects & ground water.
3) Pesticides / Insecticides / Artificial fertilisers:
● Alters the health of the soil.
● Causes harm to the plants & the organisms living in the soil.
4) Heavy metals (merculy, arsenic etc.)
● Causes toxic harm to plants & animals.
● Highly poisonous .
5) Industrial wastes:
● pH level of the soil can be altered.
● Makes ground water either too acidic or too basic.
6) Radon:
● Harms microorganisms .
● Can cause lung diseases.
7) Hydrocarbons:
● Affects soil health
● Affects the micoorganisms in the soil.
___________________
Hope it helps ⚜
When a garter snake consumes a mouse, what happens to the organic matter that made up the mouse's body?
A.
It changes form.
B.
It is destroyed.
C.
It leaves the ecosystem.
D.
It becomes more massive.
Which of the following is NOT true about bacteria
Answer:
The answer would be B
Explanation:
:=)
Answer:
B.
Bacteria are single-celled prokaryotic organisms, and it is a proven fact that prokaryotic cells lack a nucleus, cytoplasm, and membrane-bound organelles.
If the anterior pituitary began overproducing FSH due to a tumor, and it no longer responds to normal feedback mechanisms; what would happen
If the anterior pituitary began overproducing FSH due to a tumor, then the levels of inhibin would increase.
What is inhibin?The inhibin protein is a crucial factor involved in the generation of follicle-stimulating hormone (FSH) present in the body.
Inhibin protein is generated by specialized cells such as Sertoli cells (males) and granulosa cells (females).
In males, inhibin protein concentration in the blood is correlated to sperm (male gametes) count.
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Which term describes the exchange of oxygen and carbon dioxide between the blood and the cells of the body?
External respiration
Internal respiration
Aerobic respiration
Anaerobic respiration
Ο ΟΟΟ
Answer:
The exchange of gases between the blood and tissue cells is internal respiration.
Which choice states the planet or planets that have an elliptical oroit around the sun
O Earth Jupiter and Mars
Jupiter
Mars
Earth
Answer:
Earth Jupiter and Mars
Explanation:
i took the test :)
Answer: Earth, Jupiter, and Mars
Explanation: Earth, Jupiter, and Mars
Review the age structure diagram below:
Breakdown of Chinese population by age categories and gender. The age groupings are represented in intervals of 5, starting with 0-4 years old at the bottom, and concluding with 85+ years at the top. The x-axis represents percentage of population from one to five on each side. Males are on the left, and females are on the right.
© 2021 Census.gov
In which category do you see the greatest difference between males and females?
Ages 0-4
Ages 30-34
Ages 45-49
Ages 85 and up
Answer:
Ages 30-34. Look at the difference in a detailed way
:
what if the sun disappears one fine day ?
state the consequences of such a situation over the solar system.
thankyou ~
Explanation:
Sun plays an important role in our solar system especially planet like earth are dependent on sun for food, water and air. Sun helps to balance the ecosystem on earth.
Here is an assumption what would happen if sun disappear for one day only, it would be more curt if it disappear forever but from POV of one day below are certain consequences of such a situation over solar system,
You might be thinking if sun disappear then we would be seeing the moon for a whole day but don't forget, moon don't have it's own light, it reflects the rays coming from sun if sun disappear then surely moon would be like a ball kept in dark.It would happen for the first time if an asian man calls to someone in Europe, usually when here is night there is day and vica versa, but this time both will have same appear (night only)There's a idiom in Indian Hindi language that says "seeing the stars during the day time" which we use when we are going through something worse that we see the stars during daytime, but this time every human being on earth will see the stars during daytime, do not forget stars have their own light, they are not sun dependent.For the first time Night Blooming Jasmine will bloom and spread it's fragrance for 24 hours.Often when the earth revolves around its axis, a certain part of it receives light from the sun.But for the first time the earth will rotate around its axis without the sunlight falling on any part.people who are not allowed to go out of the house at night time can now enjoy the night out in the day too.Those trees and plants who slept in the hope that they would cook food in the morning with sunlight, they would not even know that their food has gone missing.Our ozon layer will have it's first leave from his duty.The bad thing is for the patients of night blindness, they will not be able to see this imaginary scene.Thanks for joining brainly community!
where did the materials that formed earth come from
Do u know Spanish because I need help on this Spanish test
Answer:
Hello, yes I speak spanish.
What happens to oxygen as air pressure decreases?
Pls I really need help
Answer:
just doing ths for points
Explanation:
have a nice day bye
Which planets are the
coldest? Which are the warmest? Why?
Answer:
The hottest planet in the solar system is Venus with an average temperature of 864 degrees Fahrenheit or 462 degrees Celsius.
The coldest planet in the solar system is Neptune with an average temperature of -353 degrees Fahrenheit or -214 degrees Celsius.
Explanation:
Why venus is the hottest planet in the solar system?
The hottest planet in the solar system is Venus with an average temperature of 864 degrees Fahrenheit or 462 degrees Celsius. The coldest planet in the solar system is Neptune with an average temperature of -353 degrees Fahrenheit or -214 degrees Celsius.(In short venus is closed to the sun)
Why Neptune is the coldest planet in the solar system?
Neptune is the coldest planet within our Solar System because it is the furthest planet from the Sun. The Sun is the ultimate source of energy for the Solar System. The temperature of a planet is affected by its distance from the Sun. Radiation from the Sun is lost to its surroundings as it travels through space.
Correct me if I'm wrong, Hope this helps
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Answer:
The coldest planets are Pluto, Neptune, Jupiter, Mars, Saturn and Uranus. Then the warmest planets are Mercury, Venus and Earth
Explanation:
The hottest planet in the solar system is Venus with the average temperature of 464 degree Celsius and the coldest planet in the the solar system is Pluto with an average temperature of -225 degree Celsius.
what are the human system
Answer:
The human system is a complicated living organism that is structured of internal and external organs and fluids. It has the heart, liver, kidneys, stomach, large and small intestines, brain, and skin.
Which phase of cell division is shown?
O prophase
O anaphase
telophase
O metaphase
Answer: I don't have the picture you're looking at, but I can try to give you some clues to help you out.
Prophase is where the chromatids enter the cell and the chromosomes attach to the spindle fibers in the cell.
Metaphase: all of the chromosomes line up in the center of the cell (I use this trick I made up to remember this one: The chromosome will have Met the teacher's expectations when they line up in the center of the cell.)
Telophase: is where the sister chromatids go to opposite sides of the cell right before they split
Anaphase is when they finally split and are now classified as two different cells. One parent cell and one daughter cell.
I hope this helps you to solve your problem!
- AnaMae10
There is a forest fire. Which cycle will be affected the most? A. Carbon cycle. B. Nitrogen cycle. C. Water cycle d. Oxygen cycle
Answer:
oxygen cycle
Explanation:
due to lose of oxygen the air will be polluted
A vaccine is a substance that contains all or part of a noninfectious version of a disease-causing organism. When the vaccine is administered to a person, the person's immune system attacks the noninfectious version of the organism and learns to recognize its surface proteins. The next time the immune system comes in contact with the same surface proteins, it has a defense already prepared in order to respond quickly to the invading organism. In this way, a vaccine gives people immunity to the disease-causing organism.
Vaccines can be life-saving, but there have been a few cases of people catching a disease from the administered vaccine.
How might genetically engineered organisms solve this problem?
A.
Disease-causing organisms could be genetically engineered to produce insulin instead of toxins.
B.
Harmless organisms could be genetically engineered to have surface proteins from disease-causing organisms.
C.
Harmless organisms could be genetically engineered to recognize and destroy random cells in the body.
D.
Disease-causing organisms could be genetically engineered to only be harmful to plants.
Examine the words.
impulse, presynaptic cell, neurotransmitters, receptors, postsynaptic cell
What idea can be described using all the words listed?
O the difference between the somatic and autonomic nervous systems
O the transfer of information from one neuron to another
O the difference between the central and peripheral nervous systems
O the flow of information within a neuron
Answer:
Answer is B
Explanation:
The idea that can be described using all the words listed is "the transfer of information from one neuron to another".
What is impulse?The term "impulse" refers to the electrical signal that travels down a neuron, while the term "presynaptic cell" refers to the neuron that sends the signal.
"Neurotransmitters" are chemicals released by presynaptic cells in order to send a signal to the next neuron.
The "receptors" on the surface of the postsynaptic cell are proteins that bind to neurotransmitters and receive the signal.
Finally, the "postsynaptic cell" is the neuron that receives the presynaptic cell's signal.
Thus, these terms describe the process of information transmission from one neuron to another across a synapse, the tiny gap between two neurons.
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Give an example of a scientific theory.
Answer:
Example of scientific theory is given below
Dalton's atomic theory, Einstein's theory of gravity, and the kinetic theory of matter.
Explanation:
PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE
Answer:
Einstein’s theory explained a famous observation that Newtonian gravity could not: a subtlety in the orbit of the planet Mercury. And his equations implied further slight deviations from Newtonian calculations. Over the last century, general relativity’s predictions have been repeatedly verified by modern precision measurements. To physicists today, general relativity and gravity are essentially synonyms.
The diagram below represents a process leading to the formation of a human embryo
Process 1 is known as:______
The first step in the formation of the human embrayo and it is called fertilization.
What is fertilization?The first step in the formation of a human embrayo is called fertilization. The term fertilization has to do with fusion of the male and female gametes to form a zygote.
Hence, the diagram as shown is the first step in the formation of the human embrayo and it is called fertilization.
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How could you take a protein with a known sequence of amino acids and use it to create an artificial gene?
It is possible to take a protein with a known sequence of amino acids and use it to create an artificial gene due to the genetic code.
What is the genetic code?The expression genetic code makes reference to certain triplets of nucleotides or codons that encode specific amino acids.
In consequence, it is possible to design a specific nucleotide sequence in order to synthesize a protein.
The genetic code shows how genetic information flows from DNA to RNA and then to protein.
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Explain how mental health are caused by substance abuse
Answer:
This is because: Certain illegal drugs can cause people with an addiction to experience one or more symptoms of a mental health problem. Mental health problems can sometimes lead to alcohol or drug use, as some people with a mental health problem may misuse these substances as a form of self-medication.
Answer:
Substance abuse can cause prolonged psychotic reactions and it can make anxiety, depression even worse.
Which type of pollution includes CFC'S and smog?
Answer: B
Explanation: trust me
What are the two main forces that cause soil erosion?
A. Water and wind
B. Plate tectonics and earthquakes
C. Plate tectonics and water
D. Earthquakes and wind
Answer:
A. Water and Wind
Explanation:
Running water is the leading cause of soil erosion because water is abundant and has a lot of power. Wind is also a leading cause of soil erosion because wind can pick up soil and blow it far away.
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