Answer:
Adenine, thymine, cytosine, guanine
Explanation:
some things use uracil instead of guanine but its less common. also to remember which ones pair up, remember Apple in the Tree (Adenine pairs with Thymine), and Car in the Garage (Cytosine pairs with Guanine).
When we ingest food containing large molecules such as lipids, carbohydrates,
and proteins, these molecules must undergo catabolic reactions whereby enzymes
split these into smaller molecules. This series of reactions is
A. absorption.
C. chemical digestion.
B. secretion.
D. mechanical digestion.
Which of the following objects could be used to model the structure of a DNA molecule?
A. a snowflake
B. a ladder
c. a three-dimensional cube
D. a branching tree
Answer:
Ladder
Explanation:
The structure of the double helix is often described as being like a ladder that has been twisted into a spiral shape. Therefore, option (B) is correct.
What is the structure of DNA?DNA (deoxyribonucleic acid) is a long, linear polymer that is made up of repeating units called nucleotides. Each nucleotide consists of a sugar (deoxyribose), a phosphate group, and one of four nitrogenous bases: adenine (A), guanine (G), cytosine (C), or thymine (T). The sequence of these nitrogenous bases determines the genetic information encoded in DNA.
One of the most common models for the structure of DNA is the "double helix" model, which was proposed by James Watson and Francis Crick in 1953. This model depicts DNA as a double-stranded helix that is held together by hydrogen bonds between the complementary nitrogenous bases A and T, and G and C. The two strands of the helix are antiparallel, meaning that they run in opposite directions. The structure of the double helix is often described as being like a ladder that has been twisted into a spiral shape.
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Un laboratorio que produce una fórmula para matar piojos recibió muchas quejas de parte de sus
clientes debido a que la efectividad del producto fue disminuyendo con el tiempo. Debido a esto
decidió cambiar la fórmula y el nuevo producto es capaz de eliminar el 100% de los piojos. ¿Cómo
explicarías que el primer piojicida fue perdiendo efecto con el tiempo? ¿Te parece que el nuevo
piojicida va a evitar recibir quejas luego de pasado un tiempo? ¿Por qué?
Answer:
Es probable que a través del tiempo la población de piojos también se vuelva resistente al segundo pijojicida. Los piojos resistentes se generan por un proceso de selección natural
Explanation:
La evolución es el proceso mediante el cual los organismos cambian (evolucionan) con el tiempo con el fin de adaptarse a sus condiciones ambientales. La selección natural opera seleccionando aquellos individuos mejor adaptados al ambiente en el cual cada individuo se desarrolla. Los individuos adaptativamente superiores poseen más chances de sobrevivir y de reproducirse, trasmitiendo de este modo sus genes a la descendencia. Las mutaciones representan la fuente principal de variabilidad genética en la forma de nuevos alelos y genes. Las mutaciones que son beneficiosas y confieren una ventaja adaptativa son seleccionadas por selección natural. En este caso, la resistencia al primer piojicida se debió a la aparición de una o más mutaciones las cuales confirieron resistencia al primer compuesto. Con el tiempo, la frecuencia de los individuos portadores de mutaciones beneficiosas en la población de piojos fue incrementándose paulatinamente (como resultado del proceso de selección natural). Es muy probable que este proceso evolutivo también se repita con el segundo piojicida.
What process is described in the situation above? a. respiration c. feedback inhibition b. circulation d. cellular activity
Question isn't complete but explanation will be given for each option
Answer and Explanation:
A. Respiration: respiration occurs when organisms take in oxygen, combine it with glucose to release carbon dioxide, water and ATP. Respiration is different from breathing since it is more of a biochemical process than physical process.
B. Feedback inhibition: feedback inhibition occurs in metabolism when an the end product of an enzyme inhibits further production of end products by the enzyme in order to reduce concentration and reduce waste that occurs when more is produced than needed by cells.
C. Circulation: circulation involves the heart, arteries and veins whereby the heart pumps blood( which carries oxygen,hormones and nutrients) and the arteries move them in circulation through the body and back to the heart through the veins, giving off waste products.
D. Cellular activity: cells are the most basic form of life known. Cellular activities are basically the activities of cells in an organism. Examples of cellular activities include: work of enzymes in digestion, cell division, synthesis of protein from amino acids etc.
Answer: C
Explanation:
Just did the quiz
Hydra is called a diploblastic animal .Why?
Where can Alveoli be found? A. In the cell membrane. B. In the hypothalamus. C. In the liver. D. In the lungs.
descirbe your house to your classmate who plans to attend your birthday party
Answer:
3 bedrooms 4 bathrooms
Explanation:
What is one of the reasons why Gregor Mendel chose to study pew plants
5 Which situation would be most likely to cause a DNA mutation? O A A wood frog in a lake is exposed to temperatures below 0°C during the wi OB. A person spends one hour each day under the ultraviolet rays of a tanning OC. A maple tree becomes dormant to prevent water loss during a drought. OD. A culture of cells is placed in a chamber and exposed to high pressure for Reset Nex
Answer:
B. A person spends one hour each day under the ultraviolet rays of a tanning bed.
Explanation:
Genomics refers to the scientific study of genes (DNA) found in living organisms such as humans and animals.
A genome can be defined as the complete set of hereditary instructions that is typically found in the deoxyribonucleic acid (DNA).
Deoxyribonucleic acid (DNA) is an organic complex-molecular structure found in all living organisms.
Basically, it comprises of genes and is essentially the foundation block of all living organisms such as humans, animals and plants.
Mutation can be defined as an alteration in the DNA sequence (nucleotide sequence) of a cell of a living organism either due to improper transcription, genome editing or environmental factors such as smoking, ultraviolet (UV) light, etc.
Hence, when a person spends one hour each day under the ultraviolet rays of a tanning bed, it's most likely to cause a DNA mutation. A continuous exposure to ultraviolet (UV) light would cause an uncontrolled division of certain body cells, which then invade the surronding tissues and interfere with the normal functioning of the body.
According to the principle of maximum parsimony,
A. phylogenies based in DNA require the most base changes.
B. the preferred tree is the one that minimizes the amount of evolutionary change.
C. a large number of trees should be examined.
D. in the case of trees based on morphology, a parsimonious tree requires the most changes.
Answer:
The correct answer is B. the preferred tree is the one that minimizes the amount of evolutionary change.
Explanation:
The principle of maximum parsimony selects the cladogram or phylogenetic tree that explains the phylogeny that has the minimum number of evolutionary changes. It is based on the principle known as Occam's Razor (Occam’s razor) formulated by William Ockham in the 14th century. This principle refers to a type of reasoning based on a very simple premise: other things being equal, the simplest solution is probably the correct one. This is because the simplest solution requires the least number of assumptions and logical operations. The basic premise in Parsimony is that taxa that share a characteristic (similarity) do so because they inherited that characteristic from a common ancestor, homology.
HELP ME FASTT I NEEED IT NOW
Answer:
C.
Explanation:
they aren't organic so they are manufactured synthetically, not naturally
Answer:
C
Explanation:
Science
Question 1 of 10
Which substance is an example of organic matter?
O A. Oxygen
O B. Sugar
O C. Salt
O D. Carbon dioxide
Answer:
B: Sugar
Explanation:
Which of the following explains why DNA testing is used in the lumber industry?
O to locate the strongest trees for harvesting
O to figure out the species of individual trees
O to help find the best trees to use in breeding
O to determine the source countries of tree products
Answer:
I think it's the second one
Explanation:
It's probably the second one. Some people don't know how to distinguish different types of trees.
Answer:
to avoid illegal lumber, endangered species and forged certificates
Which feature of Earth is part of the geosphere?
O air
O fish
O rocks
Oglaciers
HELP ME PLEASEEEEE
Answer:
Rocks
Explanation:
Geo means “earth.” The Earth’s geosphere (sometimes called the lithosphere) is the part of the Earth that includes all the rocks, minerals and landforms of the surface and interior that make up the Earth. It starts at the ground and extends all the way down to Earth’s core.
The feature of the Earth that is part of the geosphere is rocks. The correct option is C.
What is the geosphere?The geosphere is made up of every rock on Earth, from the melting rock beneath the crust to the massive, age-old mountains to the sand grains on the seashore.
The biosphere, a global ecosystem that includes all life on Earth, has a home in both the geosphere and the hydrosphere and lithosphere, etc. Organisms live in both, the geosphere and the hydrosphere.
The geosphere is always moving because the tectonic plates are always moving, and they sometimes collided with each other. The formation of new landmass, volcano eruptions, lava, molten magma, plants and other things, earthquakes, etc. all happened in the geosphere.
Thus, the correct option is C. rocks.
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Explain the structure of the nucleus in a living cell
Answer:
The nucleus contains nearly all of the cell's DNA, surrounded by a network of fibrous intermediate filaments and enveloped in a double membrane called the "nuclear envelope". The nuclear envelope separates the fluid inside the nucleus, called the nucleoplasm, from the rest of the cell.
hope that helps<3
Answer:
Look at the explanation
Explanation:
Nucleus is situated in the cytoplasm of the cell.
Usually, it is round but many different shaped nuclei can be seen in some cells.
It is surrounded by two porous membranes called nuclear membranes which remain continuous with the Endoplasmic Reticulum.
Within the nuclear membrane is present a liquid substance called nucleoplasm.
Nucleoplasm contains two types of chromatin material: Heterochromatin and Euchromatin.
Chromatin fibres are thin thread-like structures composed of DNA and proteins.
These fibres condense to form short thick chromosomes during cell division and become visible.
DNA molecules transfer hereditary information from one generation to the next.
Hope this helps!
explain the four weed control methods. give at least 2 examples that you practice. 2 example in each control method.. plzz ans this question
Answer:
Cultural Weed Control, Mechanical Weed Control, Biological Weed Control and Chemical Weed Control.
Explanation:
Cultural Weed Control, Mechanical Weed Control, Biological Weed Control and Chemical Weed Control are the four methods used for weed controls. Pulling and digging are the two examples of Mechanical weed control while on the other hand, herbicides such as Metribuzin and 2,4-dichlorophenoxyacetic acid (2,4-D) are the two examples of Chemical Weed Control. Herbicide is the most effective and quick method used for weed control.
Why is a female skeleton smaller, and not as wide a male skeleton?
Can someone please explain?
Answer:
A male's skeleton is usually thicker, rougher and appears more bumpy. ○ Due to the fact that males have larger muscles and therefore their skeletons require stronger attachment sites. Women who have borne children have scars on the surface of their pelvis. The femur (thigh bone) of a male is thicker than a females.
Amebas are single-celled organisms that need to obtain food in order to
A. release oxygen into the air
B. protect themselves from other living
things
C. get the energy they need to carry
out life functions
D. remove harmful chemicals from the
environment
Select three examples of resistance to antibiotics that is due to an altered cellular target of the drug. Multiple select question. The activity of beta-lactamase Addition of acetyl-CoA to chloramphenicol Alteration of an enzyme involved in folic acid synthesis A change in the structure of 23S rRNA The terminal D-alanine of pentapeptide mutates to D-serine
Answer:
- Alteration of an enzyme involved in folic acid synthesis
- A change in the structure of 23S rRNA
- The terminal D-alanine of pentapeptide mutates to D-serine
Explanation:
Antibiotic resistance is the phenomenon by which microorganisms naturally have, acquire, or develop the ability to defeat the drugs designed to eliminate them. For example, trimethoprim is able to bind with the enzyme dihydrofolate reductase (DHFR) in order to inhibit the folic acid synthesis pathway. Sulfonamides (sulfa drugs) competitively inhibit the incorporation of para-aminobenzoic acid (PABA) into folic acid and thus also prevent the synthesis of folic acid. Ribosomes are organelles where proteins are synthesized. The 23S rRNA is a component of the large subunit (50S) of bacteria and archaea ribosomes. In consequence, it is expected that a modification in the structure of 23S rRNA alters protein synthesis. Finally, vancomycin acts by binding the terminal D-Ala-D-Ala residues of the polymeric lipid-PP-disaccharide-pentapeptides and thus inhibits cell wall synthesis in Gram-positive bacteria. In consequence, it is expected that a mutation at the terminal D-alanine that modifies this sequence alters the vancomycin binding site and thus also confers antibiotic resistance.
The risk index for a tsunami occurring in indonesia is 9.7 out of a maximum of 10 how could you prevent a tsunami from being a disaster ?
Answer: Protect yourself from the earthquake or volcanic eruption when it occurs because when this happens it is very likely that a tsunami will follow. Escape from the epicenter of the disaster, get as far away as possible from the water and get to a place as high as possible.
Explanation:
Indonesia is an archipelago of almost 20 thousand islands and it is located on the Pacific "Ring of Fire" which is a region where many volcanic eruptions and earthquakes occur independently of other events in other parts of the Ring. This means, Indonesia is vulnerable to volcano eruptions and earthquakes that eventually will cause tsunamis.
A tsunami is a complex event involving a group of waves in water of high energy and variable size that occurs when a large body of water is vertically displaced by some extraordinary phenomenon, for example, an earthquake, volcanic eruption, landslides, underwater detonations, meteorite impact, glacial ice slides, and others. So it is generated by the displacement of water.
The rist index for a tsunami to occur there is 9.7 of 10, this means that such an event is highly likely to occur. Since it is a natural phenomenon, there is no way to prevent it, however, there are several actions to take into account to avoid suffering major damage when this happens. This basically consists of protecting yourself from the earthquake or volcanic eruption when it occurs because when this happens it is very likely that a tsunami will follow. So you have to take it as a warning sign to flee in time. The most important thing is to escape from the epicenter of the disaster, logically get as far away as possible from the water and get to a place as high as possible, such as a mountain. It is necessary to be aware of the news and warnings to monitor the situation.
Choose the appropriate term for each labeled part of the image. Label A Label B Label C Label D
Answer:
Label A- ocean trench
Label B- ridge
Label C- ridge push
Label D- Convection Current
Explanation:
got it correct on edge. give thanks please. <3
Explanation:
Ocean Trench
Ridge
Ridge Push
Convection Current
What are the causes of wildfires?
Answer:
Humans and Wildfire
Human-caused fires result from campfires left unattended, the burning of debris, equipment use and malfunctions, negligently discarded cigarettes, and intentional acts of arson. Lightning is one of the two natural causes of fires.
Hope it's help
Correct me if I'm wrong
Explanation:
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During his trip on the HMS Beagle, Darwin found that ______________.
A plants and animals living in temperate regions were most similar to each other, regardless of the continent on which they were found.
B fossils found on a particular continent were clearly not related to the plants and animals living on that continent today.
C plants and animals were similar on every continent and in every type of region.
D plants and animals living on one continent seemed more closely related to each other, than to plants and animals living in similar regions on other continents.
Answer:
Option D
Plants and animals living on one continent seemed more closely related to each other than to plants and animals living in similar regions on other continents.
Explanation:
From Darwin's discoveries, he noticed that there was a strong relationship between the environment and the characteristics of the living organisms present there. He proposed that the environmental conditions affected the development of certain traits in organisms present there, in their quest for survival and adaptation.
These traits were passed down from parents to offspring, producing a population of organisms with similar character traits found around the same geographical location (continent in this case)
What is the number and type of cells produced from meosis
four
Explanation:
meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells
Answer:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produce 4 gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.
Explanation:
I think it will help you
A particular enzyme will usually interact with... *
Page No Date Sex in bacteria is deteaimined by ?
Answer:
Pili
Explanation:
The sex of bacteria is determined by a structure called Pilli. Pilli is not present in all species of bacteria, but within species that have this structure, such as Escherichia coli, pilli is considered an appendage present in male bacteria.
Pilli presents itself as a long hair and can also be called F factor or fertility factor and has a reproductive function, as it allows the conjunction between two bacteria (one with pili and the other without), where the male bacteria transmit genetic resources to within the body of the female bacteria , which will combine these resources with its own resources and will give rise to another bacteria.
Explain how is sunlight distributed across the world
Answer:
The sun is distibuted across the world due to The environment works in a similar way to a car's heat engine. Winds, precipitation, and evaporation processes in the atmosphere, on the other hand, spread the sun's energy across the Earth. Conduction, convection, and radiation are the methods through which heat energy is transferred.
Explanation:
I took earth science
How do somatic and inherited mutations differ?
Answer:
Inherited mutations exist in all cells in the body and somatic mutations only exist in the cell type that mutated. … Somatic mutations are gene mutations that exist in only certain cell types that are mutated, not in every cell in the body and it take place at some time during an individual's life.
which organism has the least energy grass--> rabbit--->raccoon---> wolf
Answer:
The Wolf
Explanation:
Food chain follows a law called 10% Law.
It follows that the carnivores (secondary consumers) that feed on herbivores and detritivores and those that eat other carnivores (tertiary consumers) have the lowest amount of energy available to them.
Hence wolf has the least energy
Which is most likely an example of pseudoscience?
A doctor’s study shows that insulin released constantly in the body regulated blood sugar better than injected insulin.
An experiment concludes that two populations of squirrels look similar but are not closely related.
Data shows that dogs live longer by using a certain brand of dog food.
Most people believe that drinking milk can soothe heartburn.
Answer:
Most people believe that drinking milk can soothe heartburn.
Explanation:
Pseudoscience refers to practices and beliefs that are believed to be scientific but in actuality, do not follow any known scientific method. Even after it has been logically proven that these practices have no scientific backing people continue to believe in them because through confirmation bias, they believe that they work.
True science is evidence and research-based. Pseudoscience as seen in the last option is just based on belief.
Answer:
Most people believe that drinking milk can soothe heartburn.
Explanation: