Answer:
La diversidad de un ecosistema depende de dos factores, el número de especies presente y el equilibrio demográfico entre ellas. ... Por otra parte, entre dos ecosistemas que tienen el mismo número de especies, consideraremos más diverso al que presenta menos diferencias en el número de individuos de unas y otras especies.
Explanation:
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(Im in 4th but.. I need to ask this question.) The exchange of oxygen and carbon dioxide between plants and animals is called?
A.Photosynthesis?
B. Carbon dioxide-oxygen cycle?
C. Life cycle?
D. Pollination?
Answer:
B
Explanation:
A is making oxygen
C is life and death
D is making plants grow
Answer:
b because i did this like last week and i still Remember
Explanation:
A CD4 count that is below which amount classifies an infected person as having AIDS?
A 200 cells per mm3
B 800 cells per mm3
C 400 cells per mm3
D 600 cells per mm3
Answer:
A. 200 cells per mm3
Explanation:
Answer:
I hope this helps.
Explanation:
imagine what happens if materials are not send out of the body from time to time ?
Explanation:
excretory system is present in human body which discharge out the waste material time to time. basically when a cell in a body breaks down they produce various waste material like carbohydrates eliminates carbon dioxide while digestive system eliminates through feces. any malfunctioning can cause serious problem like constipitation kidney failure and kidney stones
thrombocytes are essential for coagulation of blood comment
Answer:
Thrombocytes. Thrombocytes (platelets) play an important role in hemostasis, by plugging and repairing damaged blood vessels, thus preventing blood loss. They also participate in a cascade of events that leads to blood clotting by triggering the release of a series of coagulation factors
Answer:
Blood is a connective tissue.it has many cellular components.Thromobocytes or platelets are one of theme.<br> Thrombocytes of platelets are found in blood .There number in the blood is 250000 /cubic mL of blood .They are formed in bone marrow and their life span is one week <br> When an injuiry is caused in the blood vessele,bleeding starts ,and the platelets are disingrated to release the clotting factor 3 called thromboplastin .This in presence of
Ca2+
ions activats prothrombokinase.A series of reaction ultimately occurs which causes blood to clot and plugg the injured blood vessel thus preventing further loss of blood
How do plants and humans help each other out?
Answer:
Photosynthesis and respiration are the two essential processes that allow life to sustain on earth. In a way, they are a cycle — plants help humans breathe by providing us with oxygen, and humans help plants "breathe" by providing them with carbon dioxide.
I hope it's helpful!
Explain how the speed of light changes between a gas liquid and solid
Answer:
As a rule sound travels slowest through gases, faster through liquids, and fastest through solids. The speed of light as it travels through air and space is much faster than that of sound; it travels at 300 million meters per second or 273,400 miles per hour.
Name this structure
A:double helix
B:nucleotide
C:twisted ladder
D:hydrogen bond
Answer:
B.
Explanation:
Contains a phosphate group (yellow), nitrogenous base (green), and pentose sugar (blue).
How did the peppered moth's environment change, and what caused this change?
Answer:
Due to the industrial revolution, smoke caused the environment of the peppered moths to change to a darker/black color. This resulted in a higher prevalence of black peppered moths over white peppered moths.
Explanation:
The dark environment made it so black peppered moths had the favorable trait while the white moths, who previously had the advantageous trait due to old environments being light in color, now had a deletirous trait. Predators could now more easily see the light colored moths, so they were more likely to be killed than the dark colored moths, so more dark colored moths were able to reproduce. This lead to a larger prevalence of dark peppered moths.
During the Industrial Revolution, pollution darkened tree trunks in England. This favored dark moths, causing a decline in lighter ones.
What are peppered moths?The peppered moth's environment changed due to the Industrial Revolution in England during the 19th century. Prior to the Industrial Revolution, the trees in England were predominantly light-colored, and the majority of peppered moths were also light-colored, or "typica." However, as a result of industrial pollution, the bark of the trees darkened, becoming covered in soot and ash.
This created a selective advantage for the dark-colored peppered moths, or "melanics," who were better camouflaged against the darkened trees. The change in the moth's environment was caused by the burning of coal in factories, which released soot and other pollutants into the air, leading to widespread pollution and industrialization. This phenomenon is often cited as an example of natural selection in action, as the moths adapted to their changing environment through the evolution of their coloration.
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Explain how the fossil described above supports the idea of plate tectonics?
Answer:
Modern continents hold clues to their distant past. Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together.
This distribution of fossils led to theories that the southern continents were once joined in a supercontinent called Gondwana.
Fossils tell us when and where plants and animals once existed. Some life "rode" on diverging plates, became isolated, and evolved into new species. Other life dispersed to new areas as continents reconnected, oceans narrowed, or chains of volcanic islands formed. Finding identical or similar fossils in areas separated by vast distances were some of the first clues that scientists used to reconstruct past plate movement. This distribution of fossils led to theories that the southern continents were once joined in a supercontinent called Gondwana.
Describe one density dependent factor and how it affects a population
Discuss the meaning behind the term, “Desert of Death”.
Answer:
The desert is a very harsh place and it can be extremely deadly. The temperature is the main issue and it is very dangerous. So many people have died therefor it is called the Desert of Death.
Explanation:
How do the types of resources generated by Kentucky compare with the United States?
According to the text, how much does an adult brain weigh?
about 3 pounds
about 20 pounds
about 11 pounds
about 12 pounds
Answer:
about 3 pounds
Explanation:
Answer:
The Adult brain weighs 3 pounds.
Hope this Helps!
Cells can be classified into two different categories: prokaryotic and
eukaryotic. Which of the following information is needed in order to
determine if an organism is prokaryotic?
Answer:
Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea. Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall. Many also have a capsule or slime layer made of polysaccharide.
Which of the following statements best explains why evolution by natural selection is considered a theory and not a hypothesis?
Natural selection provides the outline of an explanatory theory." Biologists consider it to be a scientific fact that evolution has occurred in that modern organisms differ from past forms, and evolution is still occurring with discernible differences between organisms and their descendants.
How is DNA created?(short answer)
Explanation:
For a strand of DNA to form, nucleotides must be linked into chains, with the sugar phosphate groups alternating. DNA is made of the building block chemical called nucleotides. Nucleotides are made up of three main parts, a sugar group, a phosphate group, and some type of nitrogen base. Hope this answers, and is helpful! Have a great day! :))
Help please! it’s urgent
Mom
eB
eb
Ebl EEBb
EEbb
EeBb
Eebb
eb
EBeb
Ebeb
Beeb
eebb
Answer:
.
Explanation:
what is this?? umm-
Create a problem that uses a monohybrid cross and work it out.
What is the difference between a dominant trait and a recessive trait?
Dominant traits will be expressed even if there is one of them while for recessive both of the parents have to have a recessive trait
Answer:
Dominant traits will always be expressed if any amount is there. Recessive traits will only be expressed if two are there.
Answer:
If a trait is dominant, then you will only have to have at least one parent with a dominant trait for the offspring to inherit the trait.
If a trait is recessive, then you will only need one parent with a recessive trait for the offspring to be able to inherit the trait.
Explanation:
Hope u have a good day
1. According to Model 1, in what type of organs are the cells that enter meiosis I found? 2. Considering what you already know about mitosis in cells, what event must take place during interphase before a cell proceeds to division? 3. What two structures make up a single replicated chromosome? 4. In Model 1, how many replicated chromosomes does the cell contain during prophase? 5. At which stage in meiosis I do the pairs of homologous chromosomes come together? 6. Once the chromosomes have formed a pair, what are they called?
Answer:
1.) Sex organs
2.) DNA replication
3.) Sister chromatids
4.) Two identical daughter cells
5.) Late prophase 1
6.) Tetrads
Explanation:
Meiosis is a type of cell division that occurs in living organisms which involves the division of a single cell to produce four cells containing half the original amount of the parent genetic information. An example of organs that enter meiosis is the SEX CELLS.
Mitosis is another type of cell division that leads to the production of two daughter cells which are genetically identical to the parent cell. During interphase before a cell proceeds to division, DNA replication must occur. This is a process DNA uses to make a copy of itself during cell division.
Chromosomes are genetic material which occurs in pairs known as the SISTER CHROMATIDS
PROPHASE in the stage the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells
During late prophase 1 the pairs of homologous chromosomes come together to form two chromosomes and four chromatids, with one chromosome originating from each parent.
Once the chromosomes have formed a pair they are called TETRADS
What raw materials (Reactants) are needed for respiration?
Options:
A: glucose and oxygen
B: water and carbon dioxide
C: water and glucose
D: water and oxygen
ASAP Help Please!! Which of the described compounds is required for cheese making?
O Alcohol
O Sodium bicarbonate (baking soda)
O Lactic acid
Gluten
Replication in Living Cells
Prokaryotes
Eukaryotes
Both
1. New chromosomes remain attached to
cell membrane
2. Proteins check for errors
3. Starts at one place
4. Proceeds in two directions
5. Copies of DNA condense into
chromosomes that separate
6. Starts at many places
Answer:
1. New chromosomes remain attached to cell membrane - Both
2. Proteins check for errors - Both
3. Starts at one place - Prokaryotes
4. Proceeds in two directions - Both
5. Copies of DNA condense into chromosomes that separate - Both
6. Starts at many places - Eukaryotes
Explanation:
The difference between prokaryotic and eukaryotic DNA replications is associated with the origins of replication, that is, the locations where replication starts. While in eukaryotic DNA, the origin of replication occurs in several places along the strands of DNA, replication in prokaryotic DNA has a unique origin of replication.
Replication of a cell refers to the formation of the two alike copies of DNA it is crucial for biological legacy, cell growth and division.
The process of replication in prokaryotes and eukaryotes somewhat contrasts from each other.
1. New chromosomes remain attached to cell membrane - Both in prokaryotes and eukaryotes.
In prokaryotes, the single circular chromosome remains attached to the cell also in eukaryotes chromosomes remain attached to the nuclear envelope.
2. Proteins check for errors - Both in prokaryotes and eukaryotes.
Although the process of formation of proteins is different proofreading occurs in both types of organisms.
3. Starts at one place - Prokaryotes.
Replication in prokaryotes originates from only one place while eukaryotic replication can occur from multiple positions.
4. Proceeds in two directions- Prokaryotes.
Replication in prokaryotes is bidirectional and advances in two directions.
5. Copies of DNA condense into chromosomes that separate - Both in prokaryotes and eukaryotes.
DNA condenses in the nucleoid which later gets separated.
6. Starts at many places - Eukaryotes.
In eukaryotic replication, the DNA strand has multiple sites of origin and the replication can occur at multiple positions.
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What type of cells
would producers
contain? List 3
examples.
Answer:producers are organisms that make their own food. Producers create food for themselves and also provide energy for the rest of the ecosystem. Any green plant, like a tree or grass, as well as algae and chemosynthetic bacteria, can be producers. Consumers are organisms that need to eat to obtain energy.
Explanation:
I don't know at all im lost
PLEASE PLEASE HELP
i don't get this and it's confusing
Yeah that looks hard good luck
8. Ice erodes rock and deposits sediments to form
Answer:
glacial landforms
Explanation:
Glaciers cause erosion by plucking and abrasion. Glaciers deposit their sediment when they melt. Landforms deposited by glaciers include drumlins, kettle lakes, and eskers.
Answer:
Erosion and Deposition by Ice Key Concept Glaciers shape Earth’s surface by moving rock and sediment. What You Will Learn • As glaciers move, they form a variety of landforms by removing rock and soil. • Glaciers deposit rock material when they melt or retreat. Why It Matters Glaciers have formed many of the landforms on Earth.
Which trait is considered dominant?
HURRYYYY PLEASEEEEEE FASTTTT
which trait is considered dominant?
The trait that is hidden or covered up by the recessive trait.
The trait that is the most specific.
The trait that masks or covers up another trait and appears
any time its allele is present at least once in the gene pair.
The largest trait someone can have.
Answer:
D. The largest trait someone can have
Explanation:
This option makes the most sense to me because the dominant trait is the largest trait you can have, that is used the most often in your genetic code.
I hope it helps and is correct!
Percey is studying the diagram shown here. the diagram is 1/4 of a larger diagram that explains the generic code. by studying the diagram Percey would be most likely to construct an answer to which of these questions
Answer:
fyjjngfhkuubbvff
Explanation:
bhjfffhjbvcfghbbvg
A large bottle with a layer of mud on the bottom is filled with pond water. Several fish and some green plants are then added and the bottle is made airtight.
The living and nonliving contents of this bottle make up
A biome
A population
А
B
с
An ecosystem
D
A species
Answer:
Ecosystem
Explanation:
The living and nonliving contents of the bottle above mentioned make up a particular type of ecosystem.
What is an ecosystem?An ecosystem is a given geographic sector or area where biotic and abiotic factors interact together.
The living forms (biotic factors) of an ecosystem form the community.In conclusion, the living and nonliving contents of the bottle above mentioned make up a particular type of ecosystem.
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