Every cell on Earth contains genetic material and ribosomes, and uses a near-universal genetic code, indicating a common evolutionary origin from the last universal common ancestor (LUCA).
All cells on Earth, regardless of being part of unicellular or multicellular organisms, share some universal features. One such universal feature found in every single cell is the presence of genetic material (such as DNA), which is necessary for storing and transmitting information. Additionally, every cell contains ribosomes for protein synthesis and uses a near-universal genetic code, reflecting a common evolutionary history rooted in a last universal common ancestor (LUCA).
This fundamental set of characteristics allows cells to perform essential functions such as growth, reproduction, and responding to environmental changes. The fact that such features are present in all forms of life, from bacteria to human beings, further supports the concept that all known organisms are descendants of a single ancestral cell that lived approximately 4 billion years ago.
In plants, tubes transport nutrients throughout the plant.
In humans, which parts carry out that function?
A.
small intestines
B.
alveoli
C.
nerves
D.
blood vessels
Answer:
D. blood vessels
Explanation:
Blood vessels the answer
The diagram shows the general structure of a lipid,
which consist of two main parts
Answer:
It's the carboxyl group.
This really has nothing to do with school but I was wondering, who here owns a chicken (chickens)?
Answer:
Me, We had 12. 2 roosters and 10 chickens now we have 6 because we killed the other ones
Explanation:
Answer:
Me
Explanation:
I have 2
Why are marine oceanographers particularly concerned with coastal regions?
O
A. Coastal regions are highly impacted by human activity.
O
B. Previous studies in marine science have largely ignored them.
O
C. They are the only areas that marine oceanographers can access.
O
D. By definition, marine oceanographers are only concerned with the coast.
Answer:
A. Coastal regions are highly impacted by human activity
Explanation:
Since I'm not completely sure I will debunk the others and let you decide.
-Option D- says they are ONLY concerned with the coast. KEY WORD only. Oceanographers study the ocean and not just the coast.
-Option C- also not true, the coast is probably the easiest portion to access but growing technologies and inventions like submarines made the ocean easier to study.
-Option B- I'm not sure of this one. I would think previous studies would start with the coast because it's the easiest to access
-Option A- Man-made beaches, water pollution, shoreline erosion. changing an organisms environment disrupts the ecosystem and human activities cause a significant decline in coastal habitats. i think this is the answer
Answer: The correct answer is A. Coastal regions are highly impacted by human activity.
Explanation:
Human activity near coastal regions includes the use of inlets, beach bed changes, dredging of waterways, commercial shipping, recreational boating, land development, hotels, houses, and industrial plants. All of this activity is highly disruptive, risky, and impactful to the inhabitants of the local ecosystems.
compare and contrast the two cycles of matter
Answer:
The two cycles of the matter are the carbon and nitrogen cycle. Both of them are biogeochemical cycles, it means that the chemicals spend a portion of the cycle in living things and non-living things. They are also common in that they both recycle nutrients that are essential to all organisms.
They are different in the manner that they cycle. Nitrogen is huge, 78% of the air around us is nitrogen. It cannot be used by plants or animals. Once the nitrogen is used by the plant and make its way to the animal, it can be released to decomposition.
Carbon has no requirement in processing by bacteria prior to plants and animals being able to use. Plants take carbon dioxide and make it sugar, animals eat the sugar. Some of it is released carbon dioxide that we exhale.
Answer:
The path of energy in an ecosystem is unidirectional, that is, it has a one-way path. On the other hand, matter circulates between the biotic environment and the abiotic environment, thanks to the presence of decomposers. This circulation of matter is called cycles of matter. These cycles are essential for the life and reproduction of living beings. They are natural processes that recycle chemical elements such as carbon, water, nitrogen, phosphorus, among other elements.
Below is a comparison between the carbon and nitrogen cycles.
Explanation:
Nitrogen: Nitrogen is an essential chemical element for life, it participates in protein molecules and also in the nitrogenous bases of nucleic acids. In its gaseous form (N2), it constitutes almost 80% of the atmospheric air, but it cannot be assimilated directly by the vast majority of living beings. Plants can absorb nitrogen in the form of ammonia or nitrates and animals take advantage of this element when they ingest proteins that contain it. Plants can obtain nitrates by two different methods: biological or direct fixation and nitrification.
Carbon: Organic compounds are those that have carbon in their composition. In the atmosphere, we find carbon in the form of carbon dioxide (CO2). Carbon dioxide is popularly known as carbon dioxide and it can pass from the abiotic medium to the biotic medium through the producers, through the process of photosynthesis. Photosynthesis uses six molecules of carbon dioxide to produce one molecule of glucose, so deforestation contributes to the accumulation of carbon dioxide in the atmosphere. Carbon can occupy different trophic levels along the food chains and returns to the abiotic environment through the breathing of living beings, in the form of CO2, and also through the decomposition of excreted substances and organisms that have died.
Burning fuels such as coal, firewood and petroleum products, such as gasoline, also releases carbon dioxide into the atmosphere. Some of the carbon does not return to the cycle, as it enters the composition of bones and shells, constituting the carbonates that decomposers are unable to modify. The assimilation and return of carbon to the abiotic environment are directly related to the energy flow of ecosystems. We can see from this that all cycles are related, to keep the biosphere in balance.
igneous rocks are classified based upon their:
Answer:
Composition and texture. Hope this helps.
Explanation:
Answer:
texture and mineralogy
Explanation:
HELPP PLZZZZ ASAP!!!!!
A.) what is the effect of livestock on the amount of methane gas
Ben was studying the Irish Potato Famine and wanted to identify a critical factor for it. Which factor can Ben consider as critical for the Irish Potato Famine?
A.
too much rainfall
B.
too little rainfall
C.
lack of fertilization
D.
lack of genetic diversity in the potato plants
Answer:
D. lack of genetic diversity in the potato plants
Explanation:
The Irish Potato Famine occurred because of successive years of failed crops. The Irish became almost totally dependent on the potatoes as their primary food of source by the 18th century. This led to heavy dependence on this plant for the sheer survival of the population, which makes the population very vulnerable to famine, as the genetic diversity is too small, so a single disease can make enormous damage. That is exactly what happened, as the late blight managed to destroy the potato plants, leaving the country without its primary food source. The end result was large portion of the population dying because of starvation, lot of people were barely surviving, and lot of people migrated out of the country.
Final answer:
Ben should consider the lack of genetic diversity in Irish potato plants as the critical factor for the Irish Potato Famine, as this led to the susceptibility of the crop to potato blight, resulting in mass starvation and emigration.
Explanation:
The critical factor Ben can consider for the Irish Potato Famine is lack of genetic diversity in the potato plants. This lack of diversity made the single variety of potato grown in Ireland extremely susceptible to a disease known as potato blight, caused by the pathogen Phytophthora infestans. When the blight struck, it wiped out the entire potato crop, which was a staple food source for the Irish population at the time. The devastation led to mass starvation, with over one million deaths, and huge emigration, with nearly two million people leaving Ireland. This event highlights the significant risks associated with low crop diversity and the importance of breeding a variety of crops to maintain food security.
Which type of bacteria is shown in the image?
A. bacillus
B. coccus
C. spirillum
D. cholera
i need help now
Answer:
B. coccus
Explanation:
I took the test on usatestprep
and put the image next time
Final answer:
The term 'vibrio' is used to refer to a prokaryotic cell that is comma-shaped, distinguishing it from other bacterial shapes such as coccus (spherically shaped) and bacillus (rod-shaped).
Explanation:
In the context of bacterial shapes, when referring to a prokaryotic cell that is comma-shaped, the term that is used is vibrio. Bacteria are categorized into different shapes primarily based on their cellular morphology. For instance, coccus (pl. cocci) is a term for spherical-shaped cells, while bacillus (pl. bacilli) is used for rod-shaped cells. When bacteria present a curved rod shape, it indicates a vibrio, which are rods with a single curve, as opposed to spirillum or spirochetes that have multiple curves or a spiral shape. Therefore, the type of bacteria that is comma-shaped is called vibrio.
Which label in the above diagram represents a stoma
Answer:
stoma can be a mouth, a nose, and an anus are natural stomata.
Explanation:
there no diagram but hope this helps!
What happens to the nitrogen excreted by animals?
a
Nitrogen is converted into ammonia.
b
Nitrogen is released back into the environment.
c
Nitrates are converted into proteins.
d
Nitrates are reabsorbed by the animal.
Answer:
Nitrgen Cycle
Explanation:
Animal waste includes nitrogen that passes through the nitrogen cycle, these steps summarise into:
The nitrogen cycle moves nitrogen back and forth between the atmosphere and organisms.
Bacteria change nitrogen gas from the atmosphere to nitrogen compounds that plants can absorb.
Other bacteria change nitrogen compounds back to nitrogen gas, which re-enters the atmosphere.
OPTION B. Nitrogen excreted by animals is released back into the environment, where microorganisms convert it to ammonia and subsequently into nitrates, which plants can then use to make proteins. Thus, the excreted nitrogen rejoins the nitrogen cycle.
Explanation:When animals excrete nitrogen, it is primarily in the form of urea or uric acid. These nitrogenous wastes are then released back into the environment. Bacteria and other microorganisms in the environment can convert these into ammonia. Ammonia is then converted into other compounds, such as nitrates, which can be used by plants to make proteins. Hence, the nitrogen excreted by animals enters back into the nitrogen cycle.
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What is point source pollution of an aquatic ecosystem
Answer: Point source pollution is water pollution that comes from a direct single source and can easily be traced. Some examples of point source pollution can be oil spills, sewage drainage pipes, unlined landfills
Point source pollution occurs when pollutants enter an aquatic ecosystem from a single identifiable location, such as sewage discharges, leading to problems like eutrophication and harm to aquatic life.
Explanation:Point source pollution of an aquatic ecosystem refers to contaminants entering the environment from a single, identifiable source. Examples include discharges from wastewater treatment plants, factories, and combined sewers. During heavy rain, combined sewer systems may overflow, leading to direct spilling of untreated sewage into water bodies.
Eutrophication is another consequence of point source pollution, wherein excessive nutrients, such as nitrates and phosphates from waste, promote overgrowth of algae and bacteria. This leads to oxygen depletion in the water, adversely affecting fish and other aquatic life. Ocean acidification is a separate issue where excess CO2 in the atmosphere causes oceans to become acidic, which can harm corals and shellfish. In addition to chemicals, physical debris can also be a point source of pollution, posing dangers to aquatic wildlife.
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if an organism's diploid number is 12, its haploid number is ___
The prefix di- (as seen in the word diploid) means that it is 2 (aka double) of haploid. All you have to do is divide 12 by 2
12/2 = 6
If an organism's diploid number is 12, its haploid number is 6
Hope this helped!
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There is a liquid capsule inside a cup full of liquid. The cup full of liquid has salt in it and the liquid capsule has no salt in it. In which direction will the solvent flow?
Answer:
From the capsule into the cup
Explanation:
Because the liquid in the cup is more concentrated than that in the capsule, the solvent will move from the capsule to the cup through osmosis. Osmosis is the movement of solvent molecules from a less concentrated solution to a higher concentrated solution through a semi-permeable membrane.
Acid rain caused by industrial pollution greatly reduces the number of trees in a forested region that is home to a particular species of bird. How might this decrease in the number of trees most likely affect this bird population
a.) The population will adapt to ground dwelling.
b.) The population will increase as predators move out of the region.
c.) The population will decrease due to lack of resources.
d.) The population will stabilized when it moves to another region.
Answer:
c. The population will decrease due to lack of resources
The decrease in the number of trees most likely to affect this bird population. The effect caused is the population will decrease due to lack of resources. The correct option is c.
What is acid rain?The Acid rain Is a form of precipitation which has acidic components like sulfuric or nitric acid. This falls on the ground from the atmosphere in wet or dry forms which includes rain, snow, fog, hail, acidic in nature.
The acidic rain would decrease the number of trees. In return, the birds or animals whose habitat is the large trees and plants, may not survive there. These animals or birds will change their habitat in order to fulfil their survival needs.
Thus, population will decrease due to lack of resources. The correct option is c.
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Some Individuals produce more offspring than others. Which term describes this observation?
The answer is A. Differential reproduction.
Answer:
The correct answer is differential reproduction
Explanation:
The different individual in a population tends to produce a different number of offspring and this difference in reproduction among them is called differential reproduction. This differential reproduction is responsible for producing more offsprings by some individuals.
Nature allows those individuals who are better suited in their environment to survive up to reproduction age and produce offspring and many of those individuals who are less adapted do not reach to reproduction age thereby produce less offspring.
How is Uranus similar to Jupiter?
it has rings
It has no moons.
It has a rocky surface.
It has methane in its atmosphere.
Answer:
They both have Rings, and are Gaseous.
Which adaptation is likely to be common among prey species?
Answer:
I'm guessing Camouflage
Answer:
Camouflage.
Explanation:
Camouflage is an adaptation in which a species evolves to resemble its background. It is a technique used by many animals to blending with their surroundings. It is used by both side in battle to survive. Prey animals use camouflage to remain undetected by their predators, and predators use camouflage to unseen by their prey.
Predator and pray relationship. Pray predation is a predation when a organism adapt to survive to avoid being eaten. The adaptation help to predator in hunting for food. Predators have weapon that help to kill the prey.
Which of these is an environmental effect of deforestation and farming??
A)smog
B)poisoning wildlife
C)loss of habitat
D)use of large amounts of water
Answer: C. Loss of Habitat
Explanation: k12 testt
sediments deposited in layers eventually form what kind of rock.
Answer:
Sedimentary rocks
Explanation:
Answer: Sedimentary Rock
Mark sits on a swing that is 2.5 feet off the ground. Swinging as hard as he can, the swing reaches a height of 6 feet.
Assuming Mark holds a steady pace, the height of the swing could be represented by a cosine curve.
If Mark makes a full swing forward and backward in 3 seconds, which graph below could represent the height of the swing, in
feet, for any time, t?
O
Answer:
The answer is image A
Explanation:
A bird species that lives in only one swamp has a beak designed only for cracking snail shells. The birds depend on the snails for food.
What will most likely happen to the bird species if the swamp suddenly dries up, killing off the snails?
The bird could become extinct but may also migrate to another area where it can find food (snails).
How can you control pollution arising from the need for manufactured goods?
A.
Buy products with elaborate packaging.
B.
Use disposable goods, but dispose of them in an eco-friendly manner.
C.
Import goods from distant places.
D.
Buy products made of recycled material like paper.
B is the correct answer
Answer:
B.Use disposable goods, but dispose of them in an eco-friendly manner is the correct answer.
Explanation:.
Use disposable goods, but dispose of them in an eco-friendly manner can you control pollution arising from the need for manufactured goods.
To control the pollution arising from the need for manufactured goods waste products need to be disposed of properly because If the garbage produce from the manufactured products is not disposed of properly it will pollute the environment and cause harm to the living organisms.
proper waste disposal will reduce greenhouse gas emissions, which will help to control the pollution.
What type of reasoning is used in this example?
The air is dry in deserts.
The Sahara is a desert.
The Gobi is a desert. The Mohave is a desert.
The air is dry in the Sahara, the Gobi, and the Mohave.
A:Inductive reasoning. B:Deductive reasoning
The reasoning used is inductive reasoning.
Explanation:The type of reasoning where the examples are used to derive conclusion it is called as inductive reasoning. The end is the theory or plausible. This implies the end is the piece of thinking that inductive thinking is attempting to demonstrate. Inductive thinking is likewise alluded to as 'circumstances and logical results thinking' or 'base up thinking' since it looks to demonstrate an end first. This is normally gotten from explicit occasions to build up a general end.
As the given examples quotes many examples of desert and then derives conclusion out of it, this is considered as example of inductive reasoning.
This is when a seed will be produced that can turn into a genetically identical plant. Question 3 options: Pollinating by the wind Self-pollination Pollinating by bees Cross fertilization
Answer:
Apoximis or asexual seed formation
Apoximis is when a seed will be produced that can turn into a genetically identical plant.
Explanation;
Asexual reproduction is the type of production that results to offspring or organisms that are genetically identical to the parent plant. In plants, plants can reproduce asexually through vegetative reproduction or apomixis, without fertilization of gametes.
Apomixis is where some plants can produce seeds without fertilization. This occurs when an ovule or part of the ovary gives rise to a new seed.
When the solution concentration on the outside of a cell is greater than the solution concentrate on the inside of the cell, what type of solution is the cell within?
Answer:
Hypotonic solution
Explanation:
The solution with lower solute concentration is referred to as hypotonic solution while the other with higher solute concentration is called as hypertonic solution.
Since the solution concentration on inside of the cell is lower than that of solution present on the outside the cell; the solution inside the cell is hypotonic.
What is characteristic of a mineral
The characteristics of minerals are..
-must be a solid
-must be naturally occurring
-formed by inorganic processes
-definite crystalline structure
-definite chemical composition
the answer is option 3 or C
what is brood nurse
A brood nurse in biology is a member of a social insect colony responsible for the care of the young, having specific adaptations for tasks such as feeding, grooming, and protecting the larvae and pupae.
The term "brood nurse" refers to certain members of social insect colonies, such as ants, bees, and wasps, that are responsible for the care of the young, which is known as the brood. These nurse workers have specific physiological and behavioral adaptations that enable them to perform tasks such as feeding, grooming, and protecting the larvae and pupae. For instance, in honeybee colonies, nurse bees feed the larvae with a substance produced in their hypopharyngeal glands, known as royal jelly or worker jelly, depending on the larva's diet, which will determine its development into either a queen or worker bee.
Ms. Jones is teaching her class about rocks and minerals. She holds up a rainbow chocolate chip cookie and explains that the cookie is like a rock. Next, she points to the different colored chocolate chips. What do the chocolate chips represent? A) fossils B) gems C) minerals D) rocks
Answer:
The answer would be C) Minerals. I hope this helps!
Answer:
The Answer is (C) Hope you Ace it
Explanation:
Before United States citizens travel to Africa, a(n) _____ for yellow fever is required.
Answer:
Vaccine
Explanation:
I'm not sure but it seems like the most logical answer.
Answer:
The correct answer is immunization or vaccination.
Explanation:
Immunization is the method of developing immunity or resistant to a particular infectious disease, generally by shots or vaccines. Vaccines trigger the immune system of an individual to prevent the person against that infectious disease or pathogen.
The vaccine for yellow fever is the weakened form of the virus provided to the individual in a single shot. It can be given to people travel to yellow fever prone areas such as Africa.
Thus, the correct answer is immunization or vaccination.