name 2 reasons why oxygen was vital for the formation of living things
To survive on earth, oxygen is the single most vital element. You can survive for couple of days without taking nitrogen and hydrogen but you can’t survive without oxygen for more than few minutes.
Two main reasons which describe the importance of oxygen in the creation of living beings are:
- To generate energy in the form of ATP (Adenosine triphosphate)
- To form water (essential to conduct reactions in human body)
please help
Which of the following is the most important factor in driving global thermohaline (conveyor belt) circulation?
A. changes in density
B. changes in wind direction and velocity
C. changes in gravity
D. changes in pH
Changes in density are the most important factor in driving global thermohaline circulation. This density change is mainly due to variations in seawater temperature and salinity, which in turn affect deep ocean currents and climate.
The most important factor in driving global thermohaline circulation, also known as the global conveyor belt, is changes in density. This deep ocean circulation is driven by differences in the density of seawater, which are primarily influenced by variations in temperature (thermal) and salinity (haline).
The process works as follows: Warm, salty surface water travels to the North Atlantic where it cools and increases in density, causing it to sink into the deep ocean. This newly formed deep water then moves southward and dense water also sinks near Antarctica. Over time, as this cold, dense water gradually warms, it returns to the surface in a slow-moving system that circulates water globally, greatly influencing Earth's climate by transporting heat.
Factors such as heat fluxes, evaporation, rain, and the freezing and melting of sea ice alter the distribution of temperature and salinity at the ocean's surface, thus impacting the density-driven thermohaline circulation.
What is a major threat to biodiversity
Who is credited with creating the first accurate model of DNA?
A.Rosalind Franklin
B.Friedrich Miescher
C. James Watson and Francis Crick
D.Marshall Nirenberg and Heinrich Matthaei
Francis Crick and James Watson identified the double helical structure of DNA in 1953, illuminating the structural basis for DNA replication, hence option C is correct.
What is an accurate model of DNA?They proposed the three-dimensional model of DNA, which posits that two helical DNA strands wound around one another to form a double helix.
The alternating deoxyribose and phosphate groups attract the hydrophilic backbones that are present outside of the helix to the watery medium in the area.
The hydrophobic structure of the purine and pyrimidine bases is meant to be kept out of the water by the double helix.
Therefore, according to the Watson and Crick hypothesis, hydrogen bonds between guanine and cytosine and thymine and adenine allow for base pairing.
Learn more about DNA, here:
https://brainly.com/question/3735937
#SPJ2
Some inquisitive students found two slugs and wanted to take them to science class. The only container they could find was a used potato chip bag. The students stored the slugs in the bag to take to school the next day, When the students opened the bag at school, they found that the slugs had melted and turned to slime. Why did this happen?
A) The slugs had an defensive reaction to the salt, and the slime was a response to that reaction.
B) The salt around the slugs created a hypotonic environment, which caused water to diffuse into cells and made them undergo cytolysis.
C) The salt around the slugs created a hypertonic environment, which caused water to diffuse out of cells and made them undergo plasmolysis.
D) The salt around the slugs created an isotonic environment, which caused water to diffuse out of and into the cells which made the slugs melt.
C) The salt around the slugs created a hypertonic environment, which caused water to diffuse out of cells and the cells will shrink.
What are all of the the types of weather fronts
What would happen if guard cells in a plant stopped working?
A.
Diseases would quickly invade the plant.
B.
Photosynthesis would occur more slowly.
C.
Stomata would not open and close.
D.
Chloroplasts would change color.
Which of the following statements describes how you would classify Figure 28.2 as a negative feedback loop?
a
The control center counteracts change from a set point.
b
The sensors notice an increase away from a set point.
c
Nerves and hormones carry messages to target organs.
d
A target organ receives and responds to a message.
the answer is a. When the heart rate is too high, the body sends hormones that continually increase the heart rate higher.
what does the phylogenetic tree tell you about the evolutionary relationships of animals?
A)animals descended from one ancestor
B)Animals are unrelated to one another
C)Animals belong to several different kingdoms
D)Animals have many different ancestors
Final answer:
Phylogenetic trees help visualize the evolutionary relationships among species by showing how they diverge from common ancestors. Rooted trees indicate that all organisms, including animals, share a single ancestral lineage. Therefore, phylogenetic trees provide evidence that animals descended from one ancestor.
Explanation:
Phylogenetic trees are crucial tools used by biologists to understand the evolutionary relationships among different species, including animals. These diagrams, whether rooted or unrooted, provide a visual representation of how species are related to each other and trace back to common ancestors. A rooted phylogenetic tree starts with a single ancestral lineage at its base, from which all other branches diverge.
This common ancestral point signifies that, according to the theory of evolution, all organisms represented in the diagram share a single ancestral lineage. Thus, these trees can show us how closely related different species are, how recent or ancient these relationships might be, and even hint at the chronological sequence of divergences that led to the current diversity of life forms.
Regarding the options provided, the most accurate answer to the question of what phylogenetic trees tell us about the evolutionary relationships of animals would be 'A) animals descended from one ancestor'. This option aligns with the concept of a rooted phylogenetic tree, where all organisms represented in the diagram relate back to a single ancestral lineage, showcasing the interconnectedness of life and how diverse species have evolved over time from this point.
Radio tagging of animals is a way to save many endangered animal species. How do scientists use radio tagging to help them save animals?
A) Scientists can track the movements of the endangered animals.
B) Scientists can study the movements of the animals’ predators.
C) Radio tags act as bait for the prey of these endangered animals.
D) Radio tags keep the predators of the tagged animals away from them.
pips these here is science
A species of gray wolf was eliminated from a national park because of unrestricted hunting. As a result, there was a tremendous increase in the population of its prey, the elk. The populations of other herbivores also increased. What imbalance might this situation have on the ecosystem?
A.There will be a steep increase in the number of producers in the national park.
B.The increase in the prey population will result in overgrazing, causing a decline in woody plant species.
C.The population of other predator animals will decrease.
D.The ecosystem will remain largely unaffected.
list the four major hypotheses mendel developed using his garden pea experiments.
Help please. Need the correct answers
Which concept does the graph in Figure 6–1 illustrate?
Charles Darwin gathered a lot of data about the natural world over a 5 year period as he traveled the coastline of South America and the Galapagos Islands. Which of the following statements explains what he found after analyzing his data?
Darwin's analysis of his data gathered during his voyage led to the theory of evolution by natural selection, proposing that organisms with advantageous traits will survive and reproduce more effectively than those without such traits (option A).
Charles Darwin's pivotal research during his five-year voyage, particularly in South America and the Galápagos Islands, led him to propose a groundbreaking theory in the field of biology. After analyzing his data, he concluded that organisms with helpful traits have a better chance of surviving longer and producing more offspring than those without such traits (option A). This is the core concept of Darwin's theory of evolution by natural selection.
On the Galápagos Islands, Darwin observed that the traits of giant tortoises varied from island to island, corresponding to the specific environmental conditions of each island. For instance, tortoises that had long necks were better suited to reach higher vegetation and thus had a selective advantage in environments with taller plants. Over many generations, these advantageous traits would be passed down, leading to a gradual adaptation of the species to its environment.
What are agents that can cause infection and disease
pathogens is the answer on engenu!ty
The Healing Of A Wound In A Human Is Most Similar To The Process Of
The healing of a wound in a human is most similar to the process of regeneration.
The following information should be considered:
Regeneration is the natural process of replacing or restoring damaged or missing cells, tissues, organs,etc. Also, even entire body parts to full function in plants and animals.So it should be equivalent to one another.Learn more: https://brainly.com/question/537797?referrer=searchResults
What’s the role of oxygen in cellular respiration? Help please ASAP
Answer:
The letter A is the right answer.
Explanation:
Cellular respiration occurs in the presence of oxygen. This element is essential in the cellular respiration process, since it is responsible for accepting electrons and keeping the electron transport chain functioning.
Cellular respiration occurs after glycolysis, where pyruvate is formed along with 2 molecules of ATP. In the presence of oxygen, pyruvate is oxidized to a two-carbon compound that will react with co-enzyme-A and form NADH and CO2. This process will start the electron transport chain that will result in a protonic gradient that will transform ADP into ATP. The electron receptor in this process is oxygen, which will later be combined with hydrogen molecules to form water.
In cellular respiration, oxygen acts as the final electron acceptor in the electron transport chain. It combines with electrons and hydrogen ions to create water, facilitating the creation of ATP, the cell's primary energy source.
Explanation:Oxygen plays a critical role in the process of cellular respiration, a process used by cells to convert glucose into ATP (Adenosine triphosphate), which provides energy for the cell's activities. During cellular respiration, oxygen is used in the final stage called the electron transport chain. Here, oxygen acts as the final electron acceptor, combining with electrons and hydrogen ions to produce water. This process creates a gradient that powers the creation of ATP, the cell's primary energy source. Without oxygen, many cells can't create ATP efficiently.
Learn more about Oxygen in cellular respiration here:https://brainly.com/question/3130022
#SPJ11
The study of the similarities and differences between embryos of different organism
A section of three nucleotides beside one another is referred to as a?
A.Codon
B. Helix
C. Ribose
D. Anticodon
Which process describes the discharge of waste from the body? Absorption Chemical Elimination Mechanical
elimination is right!
I need help with c please
What statement best summarizes Gregor Mendel's contribution to science?
A.) Factors for traits in pea plants cannot be controlled
B.) Wrinkled seeds form faster than smooth seeds
C.) Garden pea plants can be grown in a variety of colors
D.) Factors for some traits are inherited from parents
please help
This means to move around. An organism must do this to find food, shelter, and space.
In which interaction does one organism defend resources from another organism?
A. Commensalism
B. Competition
C. Mutualism
D. Predation
Answer:
b
Explanation:
An interaction where one organism defends resources from another organism is known as Competition.
What do you mean by Species interactions?Species interaction may be defined as the population of one species interacting with the population of other species that live in the same locality.
Competition is a type of -,- interaction. It affects both species negatively. This is because both species compete over food, shelter, space, or any other resources.
Therefore, an interaction where one organism defends resources from another organism is known as Competition.
To learn more about Species interactions, refer to the link:
https://brainly.com/question/10438690
#SPJ2
which three components make up almost all of the energy earth receives from the sun?
Sunlight is composed of three components:-
1. Visible light: which enables the objects to be visible. The objects absorb the rays and reflect the ones which give them color.
2. Ultra violet rays: These rays are the most harmful ones. Although they are absorbed by the ozone layer and very less amount is able to reach the Earth's surface. These are cancer causing rays.
3. Infra red rays: These are the rays which are responsible for maintaining the temperature of the Earth's atmosphere. The maximum amount of sun's rays reaching the Earth are IR rays.
The table below shows the density of the crust, the mantle, and the outer and inner core of Earth arranged randomly: Density of Layers Unknown Layer Density (g/cm3) W 2.8 X 13 Y 4.6 Z 10.5 What is most likely Layer X? Crust Inner core Outer Core Mantle
Answer:
The correct answer would be the inner core.
The inner core is the innermost region of the earth which is solid in nature and is made up of the iron-nickel alloy.
The estimated radius of this solid ball is around 1220 kilometers.
Due to its solid nature, the density is estimated around 13 grams per cubic centimeter.
The temperature of this region is similar to that of the surface of the sun.
It is believed that the flow of molten alloys (present in outer core) around the inner core creates the magnetic field of the earth.
What makes plants the beginning of the food chain?
A. Plants store chemical energy as glucose
B. Only plants use solar energy in a chemical process to produce food
C. All organisms eat plants
D. Plants make food for other organisms.
Which of the following instruments focuses light through two lenses at once to magnify a cell?
Compound microscope
ORRR
Electron microscope
Answer:
Compound Microscope
Explanation:
Compound magnifies the image by focusing light through both lenses at the same time, magnifying a cell in the process.
The graph above was made by a South American biologist in the country of Brazil, after a long study on parrots. About 200 years ago, 90% of Brazil was covered in mature, deep forest. Today, well over half of this forest has been cut to make way for farms. What conclusion could you draw about the parrots in the graph?
A) Red parrots have become less common in the last 200 years.
B) There are probably less green parrots today than there once were. C) Blue parrots probably are the best adapted species to live on farms. D) The blue parrot population has likely increased in the last 200 years.
Answer:
The correct answer is B) There are probably less green parrots today than there once were.
Explanation:
The graph shows that most of the green parrots live in the deep forest region. The cutting of the deep forest would destroy their habitat and due to the lack of habitat the green parrots would eventually decrease.
As the question says, half of the deep forest is cut, so, the number of green parrots must be declined in that area.