Answer:
i think it's the double helix
Explanation:
Answer: Double helix.
Explanation: It's called a double helix because it looks like a double helix.
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What were the sources of gases in Earth's early atmosphere?
Where did oxygen come from? Why is oxygen so important for life on Earth?
How did the first oceans form?
Explanation:
As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today's atmosphere. After about half a billion years, Earth's surface cooled and solidified enough for water to collect on it.
Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbes.
How did Charles Darwin use the concept of density dependent factors in his Theory of Evolution
Answer:
Density-dependent factors are defined as the biological factors which are utilized by the population as a resource for example- food and shelter. Charles Darwin uses the concept of density-dependent factors in his Theory of Evolution to show how it affects population growth and mortality.
Charles Darwin used factors like competition, predation, and parasitism in his Theory of Evolution. He explained that habitats are limited by space and resource availability, and only the fittest organism will survive the competition.
Predator-prey relationships create density-dependent limiting factors and balance the ecosystem with limited organisms. If predators will increase in an ecosystem it will decrease the population of prey and after a certain time there will be a shortage of food as they are limited resources.
When air masses collide, changing weather patterns often occur at the boundaries between air masses. Meteorologists refer to this as a ___________.
Answer:
It causes a turbulence which makes it a front.
Explanation:
(Score for Question 3:
of [3] points)
3. Explain the role of a hypothesis in a scientific investigation.
Answer:
Short answer please
Answer:
When a scientific problem is posed and clearly defined, in the search for its final solution, one starts from a hypothesis.
Explanation:
A hypothesis is a solution to a scientific problem that is:
thoughtfully clearly formulated in the statement trial significant (non-trivial) logically and experientially permissible theoretically well explained by available scientific knowledge experientially verifiableWhich system collects "trash" from the body and also helps with fighting invading bacteria and viruses?
Group of answer choices
integumentary
nervous
skeletal
immune
immune is the system..........
Answer:
immune system
Explanation:
the organs and processes of the body that provide resistance to infection and toxins. Organs include the thymus, bone marrow, and lymph nodes.
what's hydrotropism?
Explanation:
Hydrotropism is a plant's growth response in which the direction of growth is determined by a stimulus or gradient in water concentration. An example of positive hydrotropism is the growth of plant roots towards higher relative humidity level.
hope it helps!
why are proteins considered polymers but liquids not?
Explanation:
Why are proteins considered polymers but lipids not? Lipids do not align with the definition of a polymer. Proteins are made of long chains of monomers that result in a product with new properties, but lipids are macromolecules that are in fact not made up of tiny components that make up a chain.
I need help wz this❄❄
What day is it when the Sun is at its lowest elevation in the sky all year and we experience the shortest day of the year?
A.summer solstice
B.winter solstice
C.summer equinox
D.winter equinox
PLS HELP ASAP!!!!!!!!!!
Answer:
Bacteria horses humans all three
The majority of marine organisms are found in coastal regions, rather than the open
ocean. Which of the following best explains why?
O Salinity is usually much higher in coastal regions.
O Temperatures are cooler in coastal regions.
OOcean currents bring nutrient-rich water into coastal regions.
OThe shallow waters of coastal regions provide less Oxygen.
Answer:
Ocean currents bring nutrient-rich water into coastal regions.
Explanation:
About 70 percent of our planet is covered by water. The earth has been declared a "blue planet" because it looks blue from space. About 96 percent of this water is the sea or salt water, made up of the ocean that covers the Earth.
Within these oceans, there are many different types of habitats or environments inhabited by plants and animals, from the freezing of polar ice to tropical coral reefs. Most marine life is found in coastal habitats.
Describe how a bacterium inhaled on air alongside oxygen can be isolated by the respiratory system
Answer: Bacterium inhaled from air alongside oxygen can be isolated by mucous membranes and eliminated by multiple immune defenses of the respiratory system.
Explanation:
The respiratory system consists of cilia and mucous membranes which lines the inner surfaces. These surfaces are made up of goblet cells which secrets a layer of sticky mucus. When microorganisms such as bacteria is inhaled along with oxygen, the viscosity and acidity of the sticky mucus inhibits microbial attachment to the underlying cells. The beating of cilia propels the mucus with any trapped bacteria towards the epiglottis where it is swallowed. This process of elimination prevents bacteria from further invading the lower respiratory tract.
Multiple immune defenses of the respiratory system includes:
--> mucosa associated lymphoid tissue (MALT): these includes adenoids and tonsils.
--> lysozyme
--> Surfactants
--> defensin (antimicrobial peptides)
--> alveolar macrophages
The activities of the multiple immune defenses of the respiratory system helps in the isolation and elimination of inhaled bacterium.
The process of glycolysis produces (which one)
-Carbon Dioxide
-sugar
-2 ATP
-water
Answer:
C- 2 ATP
Explanation:
Glycolysis produces 2 ATP
Why does meiosis produce cells with fewer chromosomes?
Answer:
Because the sexual reproduction joins two cells that each have half the total chromosome number :)
Because molecules will move from one side to another to come to an equilibrium, or balance of concentration, the _________________________moves from side B to side A, so the water level on side A goes _____________________________.
Answer:
Water, up
Explanation:
In the process of movement water in the diffusion of water the net movement of water goes from higher concentration to the low concentration area. The movement of water move form one side to other side until it reaches an equilibrium and the level of water on the other side goes up.
Hence, the water molecule will move from from side B to side A until it reaches equilibrium and the water level on side A goes up.
The cells produced in mitosis are called what
Answer:
I am pretty sure it's haploid sex cells
Answer:
the cells produced in mitosis are diploid body cells
Why is smoking harmful to the bronchial tubes? in your own words please ....
Answer:
It harms your lungs, and could cause lung cancer...
Question 2 of 10
Why are X-rays used in security baggage scanners?
A. X-rays are high-wavelength rays, which causes them to easily bend
around the objects in the baggage.
B. X-rays either pass through or are absorbed by the objects in the
baggage, creating an image of the objects.
C. X-rays are low-energy rays, making it safe for the machine
operators.
D. X-rays are reflected by the objects in the baggage, creating an
image of the objects.
Answer:
B
Explanation:
X- rays either pass through or are obsorbed by the objects in baggage creating an image of the objects
The statement best summarizes the role of households in the flow of goods is households exchange money for products in resource markets. Thus, option C is correct.
Who are the consumers among households?The final consumers of the goods and services produced by the businesses are the households. According to their tastes and preferences, they create demand in the market. The businesses supplied and produced goods in response to customer demand. As a result, a nation's production line is determined by its households.
To run a business, workers are needed, and business owners, managers, and employees also have families. In return for labor, the business pays wages, which increase household income.
Therefore, A company's output may fall somewhere in the middle of these two ideas. A landscaping company, for instance, might offer a homeowner a service and sell them a tree as a product.
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Please help with this. Evan reads that some minerals can come from organic processes. Where does the energy ultimately come from that is needed for organic materials to be made?
Answer: Energy from the Sun fuels life on Earth
Sunlight allows plants, algae and cyanobacteria to use photosynthesis to convert carbon dioxide and water into organic compounds like carbohydrates. This process is the fundamental source of organic material in the biosphere.
Answer:
sun
Explanation:
Examine the diagram of a cell.
Which organelle is marked with an X?
Answer:
Mitochondrium
Explanation:
|•-•| :)
Answer: the mitochondrion
What are convergent boundaries?
Answer:
Explanation:
A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction. The subduction zone can be defined by a plane where many earthquakes occur, called the Wadati–Benioff zone.[1] These collisions happen on scales of millions to tens of millions of years and can lead to volcanism, earthquakes, orogenesis, destruction of lithosphere, and deformation. Convergent boundaries occur between oceanic-oceanic lithosphere, oceanic-continental lithosphere, and continental-continental lithosphere. The geologic features related to convergent boundaries vary depending on crust types.
Plate tectonics is driven by convection cells in the mantle. Convection cells are the result of heat generated by radioactive decay of elements in the mantle escaping to the surface and the return of cool materials from the surface to the mantle.[2] These convection cells bring hot mantle material to the surface along spreading centers creating new crust. As this new crust is pushed away from the spreading center by the formation of newer crust, it cools, thins, and becomes denser. Subduction begins when this dense crust converges with less dense crust. The force of gravity helps drive the subducting slab into the mantle.[3] As the relatively cool subducting slab sinks deeper into the mantle, it is heated, causing hydrous minerals to break down. This releases water into the hotter asthenosphere, which leads to partial melting of asthenosphere and volcanism. Both dehydration and partial melting occurs along the 1,000 °C (1,830 °F) isotherm, generally at depths of 65 to 130 km (40 to 81 mi).[4][5]
Some lithospheric plates consist of both continental and oceanic lithosphere. In some instances, initial convergence with another plate will destroy oceanic lithosphere, leading to convergence of two continental plates. Neither continental plate will subduct. It is likely that the plate may break along the boundary of continental and oceanic crust. Seismic tomography reveals pieces of lithosphere that have broken off during convergence
Which of the following statements is true?
a. A technological society has no impact on the environment.
b. A technological society has a completely positive impact on the environment.
c. A technological society has both a positive and negative impact on the environment
d. A technological society has a completely negative impact on the environment.
Please select the best answer from the choices provided
Answer:
C is your best option out of these four
Explanation:
What would happen if a man experienced X chromosome inactivation?
in the dihybrid cross for pea plants shown below, ris dominant for round peas, ris recessive for wrinkled peas, y is dominant for yellow peas, and y is recessive for green peas. a student could accurately make which statements about the offspring of this cross
A. There is a 50% chance of having round, yellow peas
B. There is no chance of having round, yellow peas
C. There is a 100% chance of having round, green peas
D. There is no chance of having any wrinkled, green peas
Answer:
D, there's no chance of having any wrinkled, green peas
In the given scenario, there is no chance of having any wrinkled, green peas. The correct option is D.
What is dominant and recessive characters?When a trait has two different forms at the gene level, dominant and recessive traits exist. The dominant trait is the trait that first appears or is visibly expressed in the organism.
The recessive trait is one that is present at the gene level but is masked and does not manifest itself in the organism.
A trait that is expressed only when the genotype is homozygous; a trait that is masked by other inherited traits but persists in a population among heterozygous genotypes.
Dominant inheritance refers to the inheritance of traits that are typically passed vertically from parent to child, with both the parent and the child affected by the trait or disorder associated with that gene.
In the given image, there is no recessive alleles, all are in combination with the dominant one, so it is not possible to have wrinkled, green peas.
Thus, the correct option is D.
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Your question seems incomplete, the missing image is attached below:
What is a possible outcome of global warming?
Answer:
Higher temperatures are worsening many types of disasters, including storms, heat waves, floods, and droughts. A warmer climate creates an atmosphere that can collect, retain, and drop more water, changing weather patterns in such a way that wet areas become wetter and dry areas drier.
Explanation:
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What part of the cardiovascular system is responsible for the one-way flow of blood through the chambers of the heart
Answer:
tricuspid and pulmonary valves
Explanation:
As the heart pumps blood, a series of valves open and close tightly. These valves ensure that blood flows in only one direction, preventing backflow. The tricuspid valve is situated between the right atrium and right ventricle. The pulmonary valve is between the right ventricle and the pulmonary artery.
What is the function of the structure identified by the red arrow?
Answer:
Picture pls??????????
Answer:
Any picture??
Explanation:
I can't give you any answer if you don't add any picture.
What do we need to do to attain sustainability? Type a sentence
List three different types of proteins and their functions
TYPES OF SOLUTIONS ( BIOLOGY ) HELP!
Answer:
what???
Explanation:
Answer:
i dont understand sorry Explanation:
Plz help me ASAP WITH QUESTION 9
Answer:
anaphase
Explanation:
look up a picture of each one and read the definition