Answer:
Elephants use dirt as sunscreen, to counteract the damaging rays of the sun, elephants throw sand on themselves. Adult elephants will also douse youngsters with dust. When coming out of a bath in a river, elephants will often throw mud on themselves as a layer of protection.
Explanation:
Using the diagram above, a key characteristic of aquatic dead zones is ________ and which activities is most directly related to the dead zones in the Gulf of Mexico just west of the Mississippi River?
A) high concentration of dissolved oxygen, and extensive shrimp fishing
B) low concentration of dissolved oxygen, and farming in the Midwest
C) high concentration of nitric oxides and burning coal to generate electricity in the Northeast.
D) low concentration of dissolved phosphates an Barge traffic on the Mississippi River
breeders have developed a new variety of chicken with no feathers. Which methods were used to produce this variety?
Answer:
genetic engineering
hope this helps
give brainliest if you please
Answer:
artificial selection and inbreeding
Explanation:
Artificial selection is distinct from natural selection in that it describes selection applied by humans in order to produce genetic change. When artificial selection is imposed, the trait or traits being selected are known, whereas with natural selection they have to be inferred.
HELPPP!?!?!?!
What are some of the challenges of becoming fossilize? Why don't all
organisms leave behind fossil evidence?
In pea plants flower color is a completely dominant trait with purple flowers being dominant to white flowers. Based on this if you crossed two pure bred flowers, one white and one purple, what would be the expected probability of phenotypes in the F2 generation?
A. 75% purple 25% white
B. 25% purple 75% white
C. 50% purple 50% white
D. 100% purple 0% white
Which of these is part of a feedback loop that results in a cooling effect on earth?
A. As snow and ice melt, the underlying surfaces absorb heat from solar radiation
B. Earths oceans absorbs some of the carbon dioxide from the atmosphere
C. When permafrost melts, methane is released into the atmosphere
D. Burning fossil fuels increases the concentration of greenhouse gases in the atmosphere
The correct option is B. Earth's oceans absorb some of the carbon dioxide from the atmosphere.
To understand why option B is the correct answer, let's examine each option in the context of feedback loops and their effects on Earth's climate:
A. As snow and ice melt, the underlying surfaces absorb heat from solar radiation.
This process is known as the ice-albedo feedback loop. When snow and ice melt, they reveal darker surfaces beneath, such as soil or open water, which have a lower albedo (reflectivity) than ice. These darker surfaces absorb more solar radiation, leading to further warming and more melting, thus amplifying the initial warming. This is a positive feedback loop that contributes to warming, not cooling.
B. Earth's oceans absorb some of the carbon dioxide from the atmosphere.
This is a negative feedback loop. The oceans act as a carbon sink, absorbing excess carbon dioxide (CO₂) from the atmosphere. This process helps to reduce the greenhouse effect because less CO₂ in the atmosphere means less heat is trapped. The oceans help to regulate the Earth's climate by removing CO₂, a major greenhouse gas, which results in a cooling effect.
C. When perma frost melts, methane is released into the atmosphere.
This is another positive feedback loop. Perma frost contains large amounts of organic carbon that, when thawed, can be converted into methane (CH₄) and carbon dioxide by microbial activity. Methane is a potent greenhouse gas with a warming potential many times greater than that of CO₂ over a 100-year period. The release of methane from melting perma frost contributes to further warming, not cooling.
D. Burning fossil fuels increases the concentration of greenhouse gases in the atmosphere.
Burning fossil fuels releases CO₂ and other greenhouse gases into the atmosphere, enhancing the greenhouse effect and leading to global warming. This is a direct human contribution to climate change and is not part of a feedback loop that results in a cooling effect.
Therefore, option B is the correct answer because it describes a process that naturally counteracts global warming by removing greenhouse gases from the atmosphere, leading to a cooling effect on Earth.
Labeled parts of a DNA molecule
Answer:
A DNA molecule is a polymer, specifically being a type of polymer known as a polynucleotide. In other words, it is made up of many nucleotides. Each nucleotide is made up of three main parts: one or more phosphate (P) groups, a nitrogenous base (adenine, guanine, cytosine, or thymine), and a deoxyribose (pentose, 5-carbon) sugar. Adenine always binds/hydrogen bonds to thymine, and guanine always to cytosine. (According to Chargaff's rules, the amount of pyrimidines is always equal to that of purines.) Hope this helps! :)
DNA is a double helix structure made of nucleotides. Each nucleotide comprises a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group. The backbone is made of the sugar and phosphate groups, while the nitrogenous bases are on the inside.
Explanation:The DNA molecule, deoxyribonucleic acid, is a double helix structure formed by two polymers wound around each other. DNA is made up of small units called nucleotides. Each nucleotide is made of a nitrogenous base, a five-carbon sugar called deoxyribose, and a phosphate group. The pair of strands forming the DNA molecule are held together by hydrogen bonds between the nitrogenous bases, which include adenine (A), thymine (T), cytosine (C), and guanine (G). The sugar and phosphate groups form the backbone of the molecule, while the nitrogenous bases are on the inside.
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WILL MARK BRAINLIEST
I NEED HELP THIS IS MY LAST QUESTION ON MY TEST
Which is a correct interpretation of this cladogram?
A. Kangaroos reproduce using placenta
B. Salmon evolved before kangaroos
C. Lizards do not have jaws
D. Earthworms are unicellar
Answer:
B) Salmon evolved before kangaroos
Hope this helps!
Please mark brainliest!
Please answer, I'm stuck :/
Which happens during the day at the beach?
A: The water is cooler than the land, and wind blows toward the beach.
B: The water is warmer than the land, and wind blows toward the beach.
C: The water is warmer than the land, and wind blows toward the water.
D: The water is cooler than the land, and wind blows toward the water.
Answer:
A) The water is cooler than the land and the wind blows towards the beach
Explanation:
During summer hot day, the land and ocean both get heated. But since the specific heat capacity of water is higher than the land , it takes longer time for ocean to heat up than the land. Since during day land is warmer than ocean, hence the air above it also gets warm and rises away. While the air over ocean is comparatively cooler than the air above on land and hence it sinks down and starts moving towards the land thereby causing sea breeze.
Hope this helps!
Please mark brainliest!
What is the process by which bacteria convert nitrogen gas in the air to ammonia and nitrates which can then be used by plants?
Nitrification is the process that converts ammonia to nitrite and then to nitrate and is another important step in the global nitrogen cycle.
The conversion of nitrogen gas in the air to ammonia and nitrates, usable by plants, is performed by bacteria through a process known as nitrogen fixation. The ammonia is then converted into nitrates in a process called nitrification. This allows plants to absorb nitrates from the soil to make proteins and other compounds.
Explanation:The process by which bacteria convert nitrogen gas in the air to ammonia and nitrates is called nitrogen fixation.
These are specialized bacteria often found on the root nodules of leguminous plants or in the soil. The nitrogen gas (N₂) is converted to ammonia (NH₃) through a process involving several steps guided by enzymes.
This ammonia can then be converted into other forms like nitrate (NO₃⁻) by other bacteria in the soil, in a process known as nitrification. Plants can absorb these nitrates from the soil and use them to make proteins and other necessary compounds.
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How can biotechnology help in increasing the yield of tobacco?
Answer:
Improved Yield from Crops,Using biotechnology techniques, one or two genes may be transferred into a crop to give a new trait to that crop. This is done in the hope of increasing its yield.
Explanation:
hope this helps
Biotechnology can increase the yield of tobacco through various techniques including genetic modification and genomics, by creating desirable traits such as disease resistance and pest resistance, and identifying and transferring these traits to the plants, resulting in robust, high-yielding crops.
Explanation:Biotechnology can aid in increasing the yield of tobacco through various techniques such as genetic modification and genomics. The genetic modification of tobacco plants, known as genetically modified organisms (GMOs), can create desirable traits such as disease resistance, herbicide and pest resistance, better shelf-life. This can result in more robust tobacco plants, leading to higher yields.
In addition, the use of genomics in agriculture can reduce the trials and failures in scientific research, improving the quality and quantity of tobacco crop yields. Scientists use genomic data to identify desirable traits and then transfer those traits to tobacco plants.
Furthermore, biotechnology can enhance tobacco plants' resistance to disease, pests, and environmental stress, resulting in improved yield and quality. Hence, with the implementation of these biotechnology techniques, the yield of tobacco can be effectively increased.
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30. Sailboat is head out to sea (against the waves) at a rate of
23km/h. The ocean current is 17km/h. What is the actual velocity of the sailboat?
Answer:6 km/h
Explanation:
Given
Velocity of Sailboat is [tex]v_1=23\ km/hr[/tex]
Velocity of ocean current is [tex]v_2=-17\ km/hr[/tex]
negative sign indicated it is opposite of Sailboat
Therefore, velocity of sailboat w.r.t ocean current is
[tex]\Rightarrow v_{12}=v_1-v_2[/tex]
[tex]\Rightarrow v_{12}=23-17[/tex]
[tex]\Rightarrow v_{12}=6\ km/h[/tex]
Name two ways rock layers can change
Answer:
folding and intrusion
Explanation:
Orchids are a recently evolved plant that have a novel feature known as aerial roots. What is the most likely function of an
orchid's specialized roots
5. What structures were visible ONLY in the elodea cell?
In elodea cells, the unique structures typically visible include chloroplasts, a large vacuole, and a cell wall. These structures contribute to the plant cell's function and protection.
Explanation:In an elodea cell, which is a fresh water plant species commonly referred to as waterweed, the structures that are frequently visible only within this type of cell include chloroplasts, a vacuole, and a cell wall.
Chloroplasts are integral to the process of photosynthesis; they convert light energy into chemical energy and give plants their green color due to the pigment chlorophyll. The cell is enclosed within a cell wall, which acts as a protective barrier and supports cell shape.
Unique to plant cells, including elodea, this structure is notable for being generally thicker and tougher than the cell membrane found in animal cells. Elodea cells also typically possess a vacuole, which is larger in plant cells (compared to animal cells), acting as a storage center.
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Each species of yucca plant is pollinated exclusively by one species of yucca moth. This insect cannot complete its life cycle in any other plant, as its larvae can only grow in the yucca flower. Which of these terms BEST describes the relationship between the moth and the plant?
a. predation
b. mutualism
c. competition
d. commensalism
Answer:
the correct answer is B
mutualism
Which Of The Following is A Cost Of Recreational Activities ?
A. Stress Relief
B. Social Interaction
C. Economic Growth
D. Spreading Weeds
Answer:
D. Spreading Weeds
Economic Growth is a cost of Recreational Activities. So, the correct option is C.
What is an Economic growth?Economic growth is the rise or development in the market price of the commodities and services generated by an economy within a given fiscal year, adjusted for inflation. Traditionally, statisticians have calculated growth as a percentage rate of the actual gross domestic product, called real GDP.
Economic growth is an increase in the production of goods and services with respect to one time period over another. Both nominal and real (inflation-adjusted) terms can be used to compute it.
Gross national product (GNP) or gross domestic product (GDP) are among the most popular measures to measure total economic growth, however alternative metrics are sometimes used. Economic Growth is a cost of Recreational Activities.
Therefore, the correct option is C.
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The genetic information that is passed from a parent to its offspring is found in _______. A. amino acids B. hydrogen bonds C. DNA molecules D. carbon atoms
Answer:C
Explanation:
Answer:
c
Explanation:
its DNA molecules
Describe how energy flows from the sun to plants to animals
Answer:
The energy flow through living organisms starts with sunlight and photosynthesis, then travels through the food chain in bite sized chunks. Primary producers, primary consumers, secondary consumers, and decomposers are all part of the food chain. It's great to be an Omnivore.
Hope this helps!
Engergy from the sunlight is absorbed by pigments in leaves through photosynthesis, completed by autotrophs. Heterotrophs them consume the autotrophs and their once light energy. Eventually, the heterotrophs die and decomposers decompose their bodies that contain the once light energy and put it in the soil.
Use the drop-down menus to complete the sentence. The image shows a type of ____ reproduction called ____ .
Answer:
1) Asexual
2) Budding
Explanation:
Answer:
1. reduction
2. oxidation
Explanation:
<3
maximum sustainable yield management is often used to manage fisheries. Which of these statements describes an advantage of MSY management with respect to fishing?
A. MSY management fails to account for the ages of fish when they are caught.
B. MSY management only accounts for the target species.
C. MSY management puts ?sh populations at risk.
D. MSY management allows for maximum productivity of a fish species.
Answer:
MSY management allows for maximum productivity of a fish species. D is the answer
Explanation:
All other opinions include "risk" and "failure" which is not an advantage. The other option only focus on target species and that like a "bias". So therefore the answer is D
I studied and took the test
Answer:
D
Explanation:
Use the drop-down menus to answer the questions. Which method gives the actual age of a fossil in years? Which method estimates the age of a fossil by comparing it to another fossil? Which method measures the amount of a radioactive element present in a fossil?
Answer:
1:absolute dating
2:relative dating
3:absolute dating
I did it on EDG
Radiometric dating is a method used to determine the age of a fossil, rock, or other materials based on the decay of radioactive isotopes. These isotopes are present in the material when it forms and they decay at a known rate over time, emitting particles and transforming into a different isotope. By measuring the amount of the radioactive isotope and its decay product, scientists can determine how long it has been since the material formed and therefore its age.
Radiometric dating is a highly precise method for determining the age of materials, and it has been widely used in various fields of science, including geology, archaeology, and paleontology. However, it is important to note that the method can only give the minimum age of a material, and it is also limited to dating materials that are less than about 60,000 years old.
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What evidence is there for plate tectonics? *
X-rays of the Earth that scientists have taken
evidence from drilling into the Earth
satellite images that show the outlines of the plates
geologic events like earthquakes and volcanoes that happen at their boundaries
Answer: geologic events like earthquakes and volcanoes that happen at their boundaries
Explanation:
Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed.
Evidence for plate tectonics includes satellite images of plate outlines, earthquakes and volcanoes at plate boundaries, drilling samples, topographical studies, and the concept of uniformitarianism to infer past tectonic activities.
Explanation:The evidence for plate tectonics comprises multiple observations and scientific data. Satellite images enable us to see the jigsaw-puzzle appearance of tectonic plates, confirming the outlines of the plates. Geologic events such as earthquakes and volcanoes that predominantly occur at plate boundaries offer strong evidence of plate movement. These natural phenomena correlate with fault lines and areas of tectonic stress where the Earth's crust is undergoing deformation. Additionally, drilling into the Earth and studying rock layers can provide direct physical evidence of past and present tectonic activity.
Geologists also use the concept of uniformitarianism to understand plate tectonic activity from the geologic past. They interpret ancient tectonic activity by observing ongoing processes and their impact on the landscape—including mountain building and the formation of rift valleys and ocean trenches. The study of topography and bathymetry also offers insights into the tectonic history of an area, with changes in elevation indicating past plate movements.
Overall, the interplay of these pieces of evidence supports the theory of plate tectonics, explaining the dynamic and continually changing nature of Earth's surface.
How are organisms classified into the 6 different kingdoms?
Explanation:
kingdom: Protista ,fungi,plantae animalia,eubacteria, archaebacteria
Organisms are classified into one of three domains and six kingdoms based on criteria such as morphology and genetics, further categorized into a hierarchical taxonomic structure. The phylogenetic relationships, influenced by rRNA sequences, inform the modern classification, which is subject to change with new scientific discoveries.
Organisms are classified into six kingdoms based on several criteria including body morphology, developmental pathways, molecular genetic machinery, and more recently, phylogenetic relationships. Each organism belongs to a domain—Bacteria, Archaea, or Eukarya—which is the most inclusive category.
Within these domains, organisms are further categorized into kingdoms: the Kingdom Bacteria, Kingdom Archaea, Kingdom Protista, Kingdom Plantae, Kingdom Fungi, and Kingdom Animalia.
The hierarchical system of classification further divides organisms into phyla, classes, orders, families, genera, and species. The three-domain classification system, based on ribosomal RNA sequences, is widely accepted as a method to demonstrate evolutionary relationships and was first proposed by Carl Woese in the 1970s.
As new information arises, organisms can be reclassified. This process is similar to organizing products in a store and ensures that the taxonomic system reflects current scientific understanding.
What is the complementary base sequence of DNA strand if the template strand reads TTGCACG
answer:
aacgtgc 20 characters
Dr. Evil administers a toxin that disrupts ribosomal RNA (rRNA) synthesis in the cell above. Which labeled structure would be most negatively impacted by this toxin?
Answer:
Well for this question it is necessary that you upload the image.
Although I would tell you that whenever mRNA is affected, protein synthesis is one of the most important and relevant causes in cell life.
Explanation:
Another fact to add is that according to the protein that is selected, determine the vitality or not of the cell.
In the inoculation of the toxin if the synthesis of a protein that makes up the membrane structure, or of the fundamental structures for vitality, is affected, the cell will go into apoptosis or die.
On the other hand, if the protein synthesis is referred to some enzyme, or a second protective messenger, the cell continues with its vitality.
The ribosomes would be the most negatively impacted structure by the toxin that disrupts ribosomal RNA (rRNA) synthesis, option A.
What is a Ribosomes?Ribosomes are responsible for protein synthesis, and they are made up of rRNA and proteins. Without rRNA, ribosomes cannot be assembled, and protein synthesis cannot occur. The other labeled structures in the image are the nucleus, the endoplasmic reticulum, and the Golgi apparatus.
These structures are involved in other cellular processes, such as DNA storage, protein folding, and lipid synthesis. While disruption of these processes would also have negative consequences for the cell, the impact would not be as severe as the disruption of ribosome function.
So the answer is A - Ribosomes.
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Why would a compressed fish with elongated jaws and banded coloration be well suited for a coral reef environment
Answer:
This fish species can hide more easily in the coral reef environment
and thus to avoid the attack of predators .
Explanation:
According to Darwin's theory, the organisms more adapted to their environments have more chances to survive and reproduce their genetic material across generations.
A compressed fish with elongated jaws and banded coloration is suited for coral reefs due to efficient feeding mechanics, camouflage, and maneuverability in tight spaces. These adaptations, among others, play a crucial role in maintaining the balance and health of diverse coral reef ecosystems.
Explanation:A compressed fish with elongated jaws and banded coloration would be well suited for a coral reef environment for several reasons. The elongated jaws allow the fish to feed on a variety of prey found in coral reefs such as coral, the cryptofauna, and seaweed. The banded coloration provides camouflage among the intricate landscapes of the reef, helping the fish avoid predators and ambush prey. Additionally, a compressed body can enable the fish to maneuver through tight spaces within the coral structures.
Coral reefs are dynamic ecosystems with more than 4,000 fish species, which include predators, herbivores, and planktivores. These species all play a role in maintaining a balanced coral reef. Predators, for instance, control the population of other species, ensuring a healthy competition for resources. Herbivores, such as parrotfish, contribute to sand production through their grazing habits. It is this interdependence that illustrates why particular adaptations are beneficial for coral reef survival.
Which example does NOT describe changes due to selective breeding?
A- A rose grower cross-pollinates roses to produce brightly-colored flowers.
B- The winner of a horse race is bred with the fastest mares to produce the fastest race horses.
C- Bacteria become more resistant to antibiotics that are used to treat bacterial infections.
D- A dog breeder pairing males and females for breeding based on the animals' temperaments.
Answer:
C- Bacteria become more resistant to antibiotics that are used to treat bacterial infections.
Explanation:
Selective breeding involves humans breeding plants and animals by choosing which animal or plant males and females will sexually reproduce and have offspring together. This is usually done to achieve a particular favorable phenotypic trait in the new offspring.
Bacteria become more resistant to antibiotics that are used to treat bacterial infections doesn’t undergo any selective breeding process by humans which makes it the right answer.
What does it mean when a gene codes for a given protein or trait?
Answer:
RNA's will "read" certain chemicals in a DNA strand to code a protein.
there are different RNAs, like tRNA, and mRNA, each with a different job
hope this helps
Explanation:
in the situation show below, what is the wet-bulb depression? 0.0°C 4.0°C 22.0°C 26.0°C
Answer:
The correct answer is 4.0°C
Explanation:
Answer:
B
Explanation:
patrick :)
Which of the following personal health practices should a person follow to prevent obesity?
Limit spending time outdoors in summers.
Have a balanced diet and exercise regularly.
Wash hands frequently to maintain proper hygiene.
Get the DNA modified to replace the faulty gene.
Answer:
Have a balanced diet and exercise regularly.
Answer:
Have a balanced diet and exercise regularly.
Explanation: