Answer:
About 78% of the Earth's atmosphere is made up of "free" nitrogen (N2), produced by biological and chemical processes within the biosphere and not combined with other elements. ... One family of nitrogen compounds produced by nitrogen - fixing bacteria are called nitrates.
Explanation:
Hope this helps
Free nitrogen refers to nitrogen gas (N₂) that exists in the Earth's atmosphere as a diatomic molecule consisting of two nitrogen atoms bonded together. It is called "free" nitrogen because it is not chemically combined with other elements or atoms.
Nitrogen gas makes up approximately 78% of the Earth's atmosphere, making it the most abundant gas present. Despite its abundance, most organisms cannot directly utilize nitrogen gas in this form. This is because the bond between the two nitrogen atoms is very strong, requiring a significant amount of energy to break.
Therefore, free nitrogen refers to nitrogen gas (N₂) present in the atmosphere that is not chemically combined with other elements. It needs to undergo nitrogen fixation to be converted into usable forms before most organisms can utilize it.
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pretend that you touch a hot pan on the stove, and you immedentially pull your hand away without thinking about it. in this scenatrio, what is the stimulus and the response?
Answer:
The stimulus the thing that stimulates you is the hot pan because you were du.mb and decided to touch the hot pan. The response is you yanking your hand away from the heat because for some reason you thought touching a hot pan was a good idea.
Explanation:
Dude seriously, be conscious.
While looking at a cell under a microscope you notice there is no nucleus and the
chromosomes are double stranded (they have 2 sister chromatids). What phase of mitosis is
the cell probably in?
Answer:
This is the Prophase. Mitotic Prophase,
Explanation:
The process cell division where the cells divides two similar daughter cells(2n) is called mitosis. Therefore it is called a multiplication division because two daughter cells are form from a single the mother cells. Each of the daughter cells can also undergo Futher divisions.
It is the second stage fist mitotic cells division after the first phase called Interphase.
In this stage, the nuclear membrane disappear, nucleolus disintegrate and the nucleus disappeared This is followed by the constriction of the chromosome to sister chromatids.
The constricted nuclear membrane leads to the releases of the chromatids This is followed by the formation of the spindles fibers which are needed for the movement of chromosome for cross over.
other phases are Interphase Prophase Metaphase Anaphase Telephase(IPMAT)
what do plants produce using nitrogen?
Answer: Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins.
Explanation:
(GIVING BRAINLIEST!!)
Which statement about oceans is incorrect?
A) Evaporation occurs when water is warmed by the sun.
B) Most evaporation and precipitation occur over the ocean.
C) 97 percent of Earth's water is fresh water from the ocean.
D) Water leaves the ocean by the process of evaporation.
Answer:
Evaporation occurs when water is warmed by the sun
Answer: 97% of earths water is salt water that one is incorrect.
Explanation:
Use the data shown to sort each of the choices into the appropriate column.
summarize: when is it appropriate to use antibiotics?
Answer:like when you have a sore throat or a kind of common sickness
Explanation:
Which specialist is needed to maintain a patient's
stability in a surgery during which the heart is
stopped?
echocardiogram technician
cardiologist
cardiac perfusionist
cardiology nurse
Answer:
Cardiac perfusionist
Explanation:
just trust me bro
I have to drag the parts to the right place
Answer:
Please make me brainliest
Explanation:
1. Control room- The nucleus controls and helps make the whole cell function
2. Gatekeeper- Plasma Membrane controls what goes in and out of the cell
3. Storage and distribution center- The Golgi Apparatus makes and distributes proteins all throughout the cell
4. Powerhouse- The mitochondria makes energy needed for the cell to preform functions
how does a banana become a banana?
There is a seed in the banana and then the seed grows into a tree and produces more banana
2. "Natural selection is usually thought of as an agent of change in populations, but it can also act to maintain the status quo."
In a short, written response, analyze and evaluate this statement. Include the range of responses of a population to changes in the environment, such as differential reproductive success, the adaptation and development of diversity in and among species, and the change in populations.
Answer:
Those organisms survive and maintain its population who are chosen by natural selection.
Explanation:
This statement means that when the population experiences a new set of environmental conditions, two things are happened i. e. the population either adjusts through natural selection or becomes extinct. The fossil of dinosaur indicates that extinction occur due to changed in the environment. If the population made changes in itself and adapt the environment then the organism survive otherwise extinction occur.
define natural greenhouse
Answer:
the natural process that warms the earth's surface is known as natural greenhouse.
•Who developed DNA fingerprinting?
•explain individual evidence and trace evidence according to DNA
•explain the use of a DNA probe
Answer:
Alec jefferis developed DNA fingerprinting.
What phenomenon is considered to be evidence of the universe "cooling off" after the great explosion of the
Big Bang?
black holes
O cosmic background radiation
O gamma rays
O X-rays
Answer:
If I’m correct it’s O cosmic background radiation
Explanation:
Answer:
black holes
Explanation:
Which 4 characteristics would farmers want bred in to the modern pig? Will give brainliest!
Answer:
Selective breeding means herd improvement, on things such as milking ability, mothering ability, carcass quality, forage utilization efficiency, stability, birth weights, weaning weights, etc and they taste better.
Explanation:
The image below depicts a bowling ball traveling down the lane and striking pins, knocking them down. Identify at least two forces acting on the bowling ball.
1. gravity
2. friction
3. air resistance
(also called ‘drag’)
4. density
8. There can only be one logical inference for any given observation. (T/ F)
Pls, Hurry up? True or False + Explain. "Sea anemones are sessile organisms and stay permanently attached to their substrate."
Answer:
True
Explanation:
Sea anemones are one of the numerous predating animals found in the marine environment. They have cylindrical bodies whose bases are usually found attached to substrates and are therefore described as being sessile. However, a few species of sea anemones are known to be free swimmers.
Generally, sessile organisms are those that live their life attached to a substrate and, therefore, are not able to freely move about.
Answer:
True
Explanation:
This is because sea anemone polyp is permanently attached to the beneath of the base where it stay by it base called pedal foot. It sometimes glide around in order to prevent itself from predation and it uses it's tentacle to catch moving food particles around it and consume it. It belong to the group cnidaria.
HELP PLZ
explain whether the following statement is true or false: “All arteries carry blood with oxygen and all veins carry blood with carbon dioxide.”
Answer:
Its true because blood flow thru our veins
Explanation:
When a sperm cell and egg cell join together what is it called?
1. sperm
2. Gamete
3. baby
4. Zygote
Answer:
4. Zygote is the answer
Answer:
Zygote
Explanation:
During fertialization a sperm cell and an egg cell come together to form a zygote.
Which statement correctly compares electric charge with electric current?
Answer:
voltage causes electric charges to move from higher to lower potential.
Explanation:
Name the two things the fetus does in preparation for birth.
Answer:
During the 28th and 32nd weeks of pregnancy, the baby will begin turning itself into a head-down position, and the baby will also move lower in the pelvis.
Explanation:
Which of the folllowing is true about the efficiency of the energy conversions in terms of the overall energy available to human shown in these diagrams
Answer:
Showing results for Which of the following is true about the efficiency of the energy conversions in terms of the overall energy available to human shown in these diagrams
Search instead for Which of the folllowing is true about the efficiency of the energy conversions in terms of the overall energy available to human shown in these
How one variable affects another happens in:
A. surveys.
B. case studies.
C. observations.
D. experiments.
The one variable affects another happens in experiments. Thus, option D is correct.
What is experiment?An experiment, or experimental research, is a research method in which the researcher manipulates or changes the value of one variable, (the independent variable) and measures the variable that is considered the dependent variable, in order to find how the change affects it.
The other three posible answers, observational research, survey and case study are also research methods, but the researcher can't manipulate or control any of the variables, these methods are used only to measure a specific variable.
Therefore, The one variable affects another happens in experiments. Thus, option D is correct.
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What shares ¼ of its genes with humans?
900.j of work are done by a light bulb in 15.0 s. What is the power of the light bulb?
If humans change the function or equilibrium of one of Earth's systems, this will not change
the function or equilibrium of all of Earth's systems.
True
False
Answer:
False.
Explanation:
All of the things found in the Earth system can be categorized into four (4) main categories and these includes;
I. Land: this subsystem forms a sphere which is generally referred to as litosphere.
II. Water: this subsystem forms a sphere which is generally referred to as hydrosphere. It comprises of landforms such as mountains, valleys, plateaus, ridge, rocks, etc.
III. Air: this subsystem forms a sphere which is generally referred to as atmosphere. This sphere comprises of gases such as oxygen, carbon dioxide, nitrogen, etc.
IV. Living organisms: this subsystem forms a sphere which is generally referred to as biosphere. It comprises of all living things such as humans, animals and plants.
If humans change the function or equilibrium of one of Earth's systems, this will significantly change the function or equilibrium of all of Earth's systems. Consequently, these changes result in environmental phenomenon such as volcanoes, earthquakes, tornadoes, wildfire, etc.
concentration.
a. The video clip explains that you can also look at water as moving to a
concentration of solute molecules.
b. Why can it also be viewed this way?
Answer:
A. The video clip explains that you can also look at water as moving to a HIGHER concentration of salute molecules.
B. Why can it also be viewed this way?
Because there is more salute and less water.
which of the following statements about extinction is true?
a) extinction is the ultimate fate of all species
b) extinction can occur in small areas
c) extinction can be caused by the introduction of exotic species
d) all of the above
Answer:
The answer is D. ALL OF THE ABOVE on PEX
Explanation:
i just took the quiz!
The ability to curl the tongue in dominant to the inability to do so. If Eric (heterozygous tongue curler) marries Brandy (also heterozygous) what are the predicted GTs and PTs of the offspring?
Answer:
Genotype = 1CC: 2Cc: 1cc
Phenotype = 3 tongue curler : 1 non-tongue curler
Explanation:
This question involves a single gene that codes for the ability or not to curl the tongue. The ability to curl the tongue (C) is dominant to the inability to do so (c). This means that a heterozygote will be able to curl his/her tongue.
According to this question, If Eric, who is a heterozygous tongue curler (Cc) marries Brandy who is also heterozygous (Cc) i.e. Cc × Cc, the following gametes will be produced by each parent: C and c.
Using these gametes in a punnet square (see attached image), the predicted genotype of the offspring is 1CC: 2Cc: 1cc while the predicted phenotype is 3 tongue curler : 1 non-tongue curler.
Analogy of Cell wall
Answer:
In school, I was taught that it is like a bouncer who controls who enters and exits the club because the cell membrane controls what is able to permeate into the cell. It’s good, but I like to think of it as a door.
if you had to choose between the phrase "natural selection gives organisms what they need" vs. "natural selection chooses traits that are most successful", which one would you choose? defend your answer.
Answer:
Natural selection gives organisms what they need
Explanation:
The species constantly evolve because of the changes around them. Natural selection gives organisms what they NEED in order to survive. "Natural selection produces organisms perfectly suited to their environments".
Species that continually evolve because of changes around them where natural selection gives organisms what they need to survive. "Natural selection makes organisms perfectly adapted to their environment".
What is Natural Selection?Natural selection is defined as the differential survival and reproduction of individuals due to differences in phenotype which is a major mechanism of evolution, a change in the genetic properties of populations over generations.
It is the process through which populations of living organisms adapt and change where individuals in a population are inherently variable, meaning they all differ in some way. This variation means that some individuals have better adaptations to the environment than others.
Thus, species that continually evolve because of changes around them where natural selection gives organisms what they need to survive. "Natural selection makes organisms perfectly adapted to their environment".
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