The nitrogen-fixing cells are still active thanks to specialized cells called heterocysts. Nitrogen from the atmosphere diffuses into the soil and becomes ammonia.
What cell is able to repair nitrogen?The symbiotic relationship between the water fern Azolla and the cyanobacterium Anabaena azollae is an illustration of this sort of nitrogen fixation. Cavities created at the base of Azolla fronds are colonized by Anabaena. In specialized cells known as heterocysts, the cyanobacteria fix a sizable amount of nitrogen there.
Which cell in cyanobacteria is in charge of fixing nitrogen?Upon removal of combined nitrogen from the growing media, some filamentous nitrogen-fixing cyanobacteria have the capacity to develop into specialized nitrogen-fixing cells known as heterocysts.
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Fossils in _______ layers of rock are generally estimated to be _______ than fossils found in the deeper layers. (3 points) Explain your answer for justification.
older, younger
newer, younger
older, older
newer, older
Answer: B) newer, younger
Explanation:
I took the test
please help me on this and no link's please
Answer:
A would be the best answer.
Explanation:
A seems to be the answer that matches data shown on the graph.
The ___________________________ is the current that spans the entire globe and forms in a large loop of circulating ocean water. This current is responsible for the balance of heat on Earth.
Answer:
ocean gyre
Explanation:
The ocean gyre may be defined as the large system of a circulating ocean currents that is formed as a result of wind patterns globally and by the forces created by the rotation of the Earth. It helps to create a large ocean conveyor belt that helps in circulating the ocean waters in the entire planets. Thus the ocean water keeps a check on the heat of the earth and maintains a balance of heat on the planet.
The ocean gyres makes the movement of the ocean water on the entire globe and thus forms a large loop of the circulating ocean water.
Explain briefly about how
implantation of embryo take
place
in the uterus.
Answer:
Implantation is the mechanism by which a blastocyst, which is passing through the uterus as a developing embryo, makes contact with the uterine wall and remains bound to it before birth. The uterine lining (endometrium) undergoes several internal modifications in order to allow for the emerging blastocyst to bind to it.
Explanation:
- Eijiro <3
View the diagram below and answer the question.
(look at the screenshot its the diagram)
Based on the diagram above, put the steps of the rock cycle in order beginning with the formation of magma and moving clockwise.
1. Weathering and erosion
2. Formation of sedimentary rock
3. Compaction and cementation
4. Heat and pressure
5. Formation of igneous rock
6. Formation of metamorphic rock
SOMEONE PLS HELP ME I LITRALLY ASKED THIS SAME QUESTION 2HRS AGO AND IT DIDN'T GET ANSWERED PLEASE HELP PLSSS:(((((((((((((
Answer:
The correct order is - 5 > 1 > 3 > 2 > 4 > 6.
Explanation:
In the rock cycle if we start from the formation of magma and move clockwise following events will occur stepwise:
Magma will solidify or cool down into the igneous rock, igneous rocks will be intrusive and extrusive in order that will make sediments after the process of weathering and erosion of the igneous rock.
These sediments after burial, compaction, and cementation will form a new type of rock, sedimentary rock. Sedimentary rocks are after a huge heat and pressure they will form metamorphic rock \.
Community one contains 100 individuals distributed among four species (A, B, C, and D). Community two contains 100 individuals distributed among three species (A, B, and C). Which community is more diverse?
Community one: 10A, 5B, 75C, 10D
Community two: 30A, 40B, 30C, 0D
Community one: 24A, 26B, 26C, 24D
Community two: 5A, 50B, 40C, 5D
What´s the final answer
Answer:
secondary succession
Explanation:
Which of the following increases genetic variation by forming entirely new alleles?
Natural selection
Genetic drift
Mutation
Gene flow
Answer:
Mutation causes brand new alleles the others just modify the rates at which preexisting alleles appear in the population.
HOW DO I FIND THE PERCeNT
N:no ears
n:has ears
-what percent of the offspring will have ears????
Answer:
50% will have ears
Explanation:
To have ears you must have the trait nn since the ears trait is recessive, 2 of the four possible offspring are like this, so 50%
What is groundwater used for in the United States?
A)
mining
B)
firefighting
C)
use in homes
D)
crop irrigation
E)
all of the above
Answer:
e.) all of the ABOVE
Explanation:
edg2021
This land from can occur at a divergent plate boundary?
A) ocean trench
B) mid-ocean ridge
C) tall mountains
D) transform fault
Hellpppppppp
Answer:
B
Explanation:
please help! Which of the following supports that eukaryotes share a common ancestry?
Genes that contain noncoding regions introns
Circular chromosomes that do not have terminal ends
Cells containing membrane-bound organelles such as mitochondria
a, b
b, c
a, c
a, b, c
Answer:
a, c
Explanation:
Eukaryotes share a common ancestry, Genes that contain introns from non-coding regions, Cells containing membrane-bound organelles such as mitochondria.
Eukaryotes share a common ancestry?Mitochondria are cellular organelles present in practically all eukaryotic cells and responsible for the process of cellular respiration. They are found in greater numbers in cells and in cellular regions where there is greater energy expenditure.
What is introns?Introns are sections of DNA located in a gene that are removed by RNA splicing during the production of mRNA or other functional RNA.
Whit this information, we can conclude that Eukaryotes share a common ancestry, Genes that contain introns from non-coding regions, Cells containing membrane-bound organelles such as mitochondria.
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so um im taking a biology test rn, and i need help on it. i was wondering if someone could help me?
Answer: yes
Explanation:
Animals develop many types of defenses to avoid being eaten. Camouflage is just one type of defense. What are other types of defenses that prey species might use?
Answer:
For instance, prey species have defense adaptations that help them escape predation. These defenses may be mechanical, chemical, physical, or behavioral.
Explanation:
Other types of defense animals can develop are mechanical and chemical defences.
Types of defense mechanism.Defence mechanism are used by various animals to better adapt to their environment and escape from their predators.
The types of defense mechanism include:
Mechanical defences: such as the presence of thorns on plants or the hard shell on turtles, physically prevents the predator from being able to eat the prey.Chemical defenses: Some animals such as the millipede makes a noxious substance that irritates eyes and skin.Physical defences: A typical example is camouflage, which is the ability of organisms to disguise their appearance in order to blend in with their surroundings.Therefore, other types of defenses are mechanical and chemical defences.
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PLEASE HELP 15 POINTS
Which of the following describes fossil evidence that supports biological evolution?
Fossils of an unknown species found in isolation from any other species
Fossils of an unknown species that is an intermediate form of two other species
Fossils of different species found within the same geographic area
Fossils of the same species found in a variety of geographic regions
Answer:
Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet's history. They can also help scientists reconstruct the evolutionary histories of present-day species.
The following describes fossil evidence that supports biological evolution: fossils of an unknown species that is an intermediate form of two other species that are present in Option B, the second option.
What is "fossil evidence"?Fossil evidence is one of the most important forms of evidence that supports biological evolution. Fossils are the preserved remains or traces of organisms that lived in the past, and they provide valuable information about the history of life on Earth. Fossils can tell us about the age, morphology, behavior, and distribution of ancient organisms, and they can also provide evidence for how these organisms have changed over time. One of the most important types of fossils that support biological evolution is the transitional fossil.
Hence, the correct answer is fossils of an unknown species that is an intermediate form of two other species that are present in Option B, the second option.
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How does global warming affect solar energy in the atmosphere?
-decreased ice causes less energy to be reflected
-decrease ice causes more energy to be reflected
-increased ice causes more energy to be reflected
-increase ice causes less energy to be reflected
Answer:
-decrease ice causes more energy to be reflected
Explanation:
Ice is Earth's most reflective substance. Thus, it helps the Earth reflect solar IR, keeping humans cool. Due to global warming , ice decreased causing less energy to be reflected. Therefore, option (A) is correct.
What is gobal warming?The long-term heating of the Earth's surface that has been observed since the pre-industrial period (between 1850 and 1900) is referred to as global warming. This warming is the result of human activities, most notably the burning of fossil fuels, which raises the levels of heat-trapping greenhouse gases in the atmosphere of the Earth.
The planet as a whole is experiencing an increase in temperature, and the poles are experiencing this increase at the quickest rate. As a direct consequence of this, ice sheets and glaciers are melting and receding. Therefore, although there is still a significant amount of snow and ice in the polar areas, there is a far smaller amount of it than there was in the past.
Therefore, option (A) is correct.
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which best describes a difference between transcription and DNA replication?
a.transcription does not require dna
b.only transcription happens in the nucleus
c.dna replication takes place in the ribosome
d. dna replication uses thymine
Answer:
D: DNA replication uses thymine
Explanation:
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Which protist exhibits both animal-like and plant-like characteristics?
a protist that has pseudopods and swims by using cilia
a protist that makes its own food and has glass-like cell walls
a protist that is a heterotroph and has chlorophyll
O a protist that can move or be stationary
Hi there!
I think the answer would be a protist that is a heterotroph and has chlorophyll. The protist falling under this category is called Euglena. Euglena has the ability to synthesize food using its chlorophyll, but if the light gets scarce it can utilize its heterotroph qualities and catch food instead.
I hope this helps!!
Answer:
c
Explanation:
To extract DNA from strawberries a
was used first to break down cell membranes.
O base solution
O isopropyl
O alcohol solution
O buffer solution
why is photosynthesis a good name for this process?
Answer:
photo means "light" and synthesis
means "to put together".
4 functions specific to sponges
Answer:
Although sponges do not have organized tissue, they depend on specialized cells, such as choanocytes, porocytes, amoebocytes, and pinacocytes, for specialized functions within their bodies. The mesohyl acts as a type of endoskeleton, helping to maintain the tubular shape of sponges.
Explanation:
this what I found when searching for the answer lol
Where are aquifers drying up the fastest? Why are they drying up?
Answer: Aquifers that are drying up are mainly near arid climates, large cities, or agricultural stations, like farms.if the aquifer is shallow enough and permeable enough to allow water to move through it at a rapid-enough rate, then people can drill wells into it and withdraw water Excessive pumping can lower the water table so much that the wells no longer supply water they can "go dry."
- Cyanide is a strong cytochrome c oxidase inhibitor. Cytochrome c is the last enzyme in the
electron transport chain. If cell is exposed to cyanide, most of the cyanide will be found in which
of the organelles?
Cyanide binds to Fe3+ in heme-containing proteins. This inhibits the terminal cytochrome complex IV of the electron transport chain. The blocklock of complex IV by cyanide depletes ATP culminating in cell death. Oxygen is unable to reoxidize the reduced cytochrome a3. Thus, cellular respiration is inhibited, as well as ATP production, in essence depriving the cells, tissue, and, ultimately, the whole body of oxygen. Hypoxia evolves into metabolic acidosis and decreased oxygen saturation. The extent of lactic acidosis indicates the severity of the cyanide poisoning. In a collapsed individual, plasma lactate is an indicator of cyanide poisoning. In severe cyanide poisonings, up to 98% of the cyanide in the bloodstream is tightly bound to red blood cells. The ancillary response is myocardial depression and decline in cardiac output. Bradycardia, hypotension, and cardiac arrhythmia then develop into VF and cardiovascular collapse.
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Where does the fruit develop from?>
A. ovary
B. leaves
C. stem
the fruit develops from ovary
What differences exist between the Zone of Maturation and Zone of Elongation?
Answer: Root growth begins with seed germination. ... The zone of elongation is where the newly formed cells increase in length, thereby lengthening the root. Beginning at the first root hair is the zone of cell maturation where the root cells begin to differentiate into special cell types.
Explanation:
What happens when you combine two clear liquid solutions, a thick black solid material forms on the bottom of the beaker.
Answer:
See explanation
Explanation:
A precipitate is formed when a mixture of two soluble substances results in the formation of an insoluble product. It usually happens during a double decomposition reaction.
The two clear liquids combined both contain soluble substances. These interact to yield an insoluble product also known as a precipitate which is black in colour and settles on the bottom of the beaker.
Color blindness in humans is a sex linked trait. If the father has normal vision (XcY), and the mother is a carrier for the color blindness trait (Xc Xc), which percentage represents the chances of their sons being color blind?
A) 25%
B) 50%
C) 75%
D) 100%
Which of the following is true about our body's system?
a The skeletal system sends messages to the body
b Blood cells are pat of the nervous system
c The digestive system helps carbon dioxide leave the body through the lungs
d The digestive systems helps break down food into energy
Answer:
D. The digestive system helps break down food into energy.
Explanation:
Hope this helps! I am 100% certain that this is the correct answer.
Select the elements that have 4 valence electrons.
hydrogen (H)
krypton (Kr)
strontium (Sr)
carbon (C)
oxygen (O)
tin (Sn)
The process used to build protein
Answer:
Protein synthesis
Explanation:
Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation.