Answer:
that two species competing for the same limited resource cannot coexist at constant population values.
Explanation:
The competitive exclusion principle states that two species competing for the same resources cannot coexist if their niche overlap is extensive.
Explanation:The competitive exclusion principle in biology states that two species competing for the same limited resources cannot coexist in the same habitat if their niche overlap is extensive.
This principle is based on the idea that one species will outcompete and ultimately eliminate or exclude the other species by utilizing resources more efficiently.
This phenomenon can be observed in nature, such as when two species of birds compete for the same type of insect prey and the more efficient species drives the other to local extinction.
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what structures inside plant cells help with photosynthesis?
Answer:
Photosynthesis takes place in chloroplasts; cell walls allow plants to have strong, upright structures; and vacuoles help regulate how cells handle water and storage of other molecules.
Final answer:
Chloroplasts, with their chlorophyll and other pigments arranged in an antenna complex, are the main structures that facilitate photosynthesis in plant cells. The process also involves the stomata for gas exchange and the mesophyll layer which houses the chloroplasts.
Explanation:
The structures inside plant cells that help with photosynthesis are called chloroplasts. These chloroplasts contain chlorophyll, the pigment responsible for the green color of plants, and are the sites where photosynthesis occurs. Chloroplasts consist of a double membrane enclosing an inner fluid called the stroma, which contains coin-like thylakoids stacked in grana. The thylakoids have a specialized membrane that embeds the chlorophyll and accessory pigments, organized in an antenna complex that captures solar energy and transfers it to a reaction center. Additionally, the process of photosynthesis in leaves involves cellular structures such as stomata regulated by guard cells for gas exchange, and the mesophyll layer where the chloroplasts are largely located.
Why is the top layer of the ocean the warmest?
The top layer of the ocean is the warmest because it absorbs most of the sunlight, resulting in a less dense water that stays at the surface. This layer, mixed by winds and currents, is called the mixed layer. Below this, temperature decreases rapidly in the thermocline, and deep layers receive no sunlight, remaining cold and stable.
Explanation:The top layer of the ocean is the warmest because it is most directly affected by the sun's energy. The sunlight efficiently heats the ocean's surface, resulting in a warm, less dense layer of water. This layer is referred to as the mixed layer, which has a uniform temperature due to the mixing effects of surface winds, waves, and currents. Beneath this mixed layer is the thermocline, a zone where the temperature drops rapidly with increased depth. Deeper parts of the ocean are substantially cooler because sunlight cannot reach them, and water here has minimal interaction with atmospheric temperatures.
The density of seawater, which is determined by its temperature and salinity, contributes to the ocean's stratification, with denser (colder and saltier) water lying below lighter (warmer and less salty) water. Human activities have increased the temperature at the ocean's surface, and satellite observations have confirmed the expansion of low-productivity areas in the ocean due to reduced vertical mixing and nutrient supply caused by this increased stratification.
Furthermore, the ocean absorbs a significant amount of the Earth's heat, with most of it concentrated near the surface. This is due to the ocean's high specific heat capacity, which allows it to absorb a lot of energy with only a small increase in temperature. Overall, the ocean's top layer remains the warmest due to a combination of sunlight absorption, wind-induced mixing, and the high heat capacity of water.
The Cretaceous-Paleogene was a mass extinction event in which nearly every single large, land-dwelling dinosaur went extinct. Which of the following did not result from this extinction event?
A.
Diverse species of animals began to evolve.
B.
Meteorites struck the region that Mexico now occupies.
C.
Clouds of dust and gas billowed into Earth's atmosphere.
D.
Ecological niches were left empty but with the potential to be filled.
Answer:
B. Meteorites struck the region that Mexico now occupies
Explanation:
The meteorite or comet that struck in the area where Mexico is located in the present is not part of the consequences of the extinctions event. The reason why it is not part of the consequences is that it is the factor that caused the consequences, so it can not be both the thing that caused something and also the consequence of it. This meteorite or comet managed to create such a huge explosion, that it managed to wipe out pretty much all large and medium sized land dwelling animals. And that was not caused only by the explosion itself, but also because it drastically changed the climate with the huge amounts of ashes and dust released into the atmosphere, as well as the triggering of the volcanoes around the world. This mass extinction though opened up the gates for the evolution of the mammals which soon became the dominant animals on the planet.
The Cretaceous-Paleogene mass extinction resulted in the extinction of large, land-dwelling dinosaurs. It led to the evolution of diverse species and left empty ecological niches to be filled in the future.
Explanation:The Cretaceous-Paleogene mass extinction was caused by a cataclysmic impact of a large meteorite, or asteroid, off the coast of what is now the Yucatán Peninsula. This impact led to the extinction of nearly every single large, land-dwelling dinosaur. The extinction event resulted in diverse species of animals evolving and ecological niches being left empty but with the potential to be filled. However, meteorites striking the region that Mexico now occupies and clouds of dust and gas billowing into Earth's atmosphere were not direct results of this extinction event.
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Use this portion of a dichotomous key for tree identification to answer the question. 1a. Needlelike leaf ® Step 10 1b. Broad leaf ® Step 2 2a. Compound leaf ® Step 3 2b. Simple leaf ® Step 7 7a. Leaf bases attached opposite each other on branch ® Step 8 7b. Leaf bases attached staggered on branch ® Step 11 8a. Leaves lobed ® Maple 8b. Leaves not lobed ® Step 9 9a. Leaves heart shaped ® Catalpa 9b. Leaves not heart shaped ® Dogwood Which best describes dogwood leaves?
Answer:
(if these are your choices)
A. They are lobed, simple leaves and are attached staggered on the branch.
B. They are not heart shaped and are attached staggered on the branch.
C. They are compound, broad leaves and are attached oppositely on the branch.
D. They are nonlobed, simple leaves and are attached oppositely on the branch.
the correct answer is D.
Explanation:
Answer: D
Explanation:
Which phrases describe the atmosphere? Check all that apply. protects Earth’s surface contains a mixture of gases and particles includes organisms in the air, on land, and in water consists of rocks, minerals, landforms, and Earth’s interior comprises oceans, lakes, rivers, streams, and groundwater
The correct option(s) are : 1 and 2. Or in letter form (A and B).
I just took this on my cumulative review test!
Good luck to the future people taking this:)
Answer:
Options (1) and (2)
Explanation:
The atmosphere is defined as the gaseous envelope that surrounds the earth. It is comprised of various gases which are found to be present at a certain amount, and this amount can also be increased or decreased depending on the processes and activities that take place on the earth's surface.
The atmosphere is helpful because it protects the lives present on earth from the harmful incoming UV radiations emitted from the sun. It also protects the water present on earth from getting evaporated into the atmosphere.
Thus, the correct answers are options (1) and (2).
18. Substances that absorb light convert it to
Answer
During this reaction, carbon dioxide and water are converted into glucose and oxygen. The reaction requires light energy, which is absorbed by a green substance called chlorophyll. Photosynthesis takes place in leaf cells. These contain chloroplasts, which are tiny objects containing chlorophyll.
Can someone please help I promise to mark brainlest!!!
Answer:
the 2nd one
Explanation:
Answer: you answer is b sorry if wrong home dog
Which structural characteristic is seen in RNA but not in DNA?
Which structural characteristic is seen in RNA but not in DNA?
Answer:a single strand
Answer:
The correct answer is the difference in the nucleotide constituents.
Explanation:
Both DNA and RNA are the nucleic acid present in the organisms but both show certain structural differences in their nucleotide as followed :
1. Sugar- sugar in RNA is known as ribonucleic acid whereas nucleic acid in DNA lacks OH group at 2' carbon position and is known as de-oxy ribonucleic acid.
2. Nitrogenous base- four types of bases bond with each other namely adenine, cytosine, guanine and thymine in DNA similar to RNA but RNA has "uracil" present in their sequence instead of thymine.
Thus, the difference in the nucleotide constituents is the correct answer.
Which is a density-independent factor?
A. Food sources
B. Hurricanes
C. Space
D. Shelter
Answer:
B. Hurricanes
B. Hurricanes
That is the answer
Based on the body structures of these animals, which two conclusions are scientifically sound?
Answer:
either A , D
Explanation:
all for have a vertabrae,although the gorilla and the chimpanzee do show signifacant same structure.
Answer: The correct answers are A and D
Explanation:
Two organism appears to be similar because they share more recent common ancestor. The body structure of the chimpanzee and gorilla appear similar because they share most recent common ancestor.
The organism frog, dog, gorilla and chimpanzee have vertebral column which means that all the four organism share the common vertebral ancestor.
why do some researchers prefer to use embryonic stem cells in medical research
Answer:
Cell therapies would use stem cells, or cells grown from stem cells, to replace or rejuvenate damaged tissue. Scientists also want to use stem cells to understand disease and find drugs that might treat it. Embryonic stem cells could be used to make more specialized tissues that have been lost to disease and injury.
Researcher's preference for embryonic stem cells is attributed to their totipotency and capacity to differentiate into any cell type, which is key in medical research and therapy development. Cloning techniques can create tissue matches to avoid transplant rejection. Nevertheless, ethical issues arise from the destruction of embryos in the process.
Researchers prefer to use embryonic stem cells in medical research due to their unique characteristics. These stem cells are totipotent, which means they have the potential to develop into any type of cell in the body, leading to significant medical applications such as the study of human embryonic development and the creation of therapies for replacing damaged tissue. Cloning techniques that employ embryonic stem cells may also enable the growth of tissue matching the donor DNA exactly, eliminating issues of tissue rejection in transplants.
Moreover, they can be grown in culture, allowing researchers to harvest and amplify these cells. Significant progress has been made in the field; for example, scientists like Freda Miller and Elaine Fuchs discovered stem cells in skin that assist in its repair, potentially aiding treatments for skin diseases and nerve damage. However, this field is accompanied by ethical concerns due to the destruction of embryos during cell harvesting, leading to moral, religious, and philosophical objections.
I need help??
Which is boatic?
A water
B temperature
C beeswax
D snow
The correct answer is C. Beeswax.
I hope this helps! : )
Which continent lies almost completely within the temperate zone?
Australia
North America
Antarctica
Africa
I took the class I think it’s Antarctica
What is a centriole?
A minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
A centriole is a cylindrical organelle composed mainly of a protein called tubulin found in most eukaryotic cells. The main function of the centriole is to help with cell division in animal cells. The centrioles also help in the formation of the spindle fibers that separate the chromosomes during cell division. They are made of nine triplets of microtubules arranged in a cylinder.
Hope this helps!
the offspring of two diferent species ,such as a liger :
I think the answer you’re look for is (a) hybrid
A hybrid is the offspring of two different species and is often infertile due to differences in genetic instructions from each parent. The ability of species or hybrids to reproduce and the fitness of the offspring can impact species evolution over time. Being part of the same species is defined by the ability to breed and produce fertile offspring.
Explanation:The offspring of two different species, such as a liger, are referred to as a hybrid. Hybrids are produced when individuals from two separate species interbreed. Often, these hybrids are infertile, meaning they cannot produce offspring themselves. This is due to differing genetic instructions from each parent species, which may interfere with the development of viable offspring. This characteristic of infertility among hybrids is noticeable in the example of a liger, a hybrid between a lion and a tiger.
However, there are situations where the hybrid offspring are more fit than the parents. In such circumstances, reproduction could continue between the species and the hybrids, potentially leading to a merging of the two species. The fit of hybrid creatures compared to their parents can impact how species evolve over time.
It's worth noting that being part of the same species is normally defined by the ability to breed and produce fertile offspring. Therefore, although two organisms may appear similar or even virtually identical, such as bald eagles and African fish eagles, they are confirmed as separate species due to their inability to produce fertile hybrids.
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Earth has been warmer in the past than it is today.
True or false
False! Climate change
The Earth used to be way colder than it is today
Describe how the functions of proteins differ from the functions of carbohydrates ( 150 words)
Component molecules assemble in different ways to form the basic units of carbs and protein. In carbs, that basic unit is a saccharide, another word for sugar. Monosaccharides are single-unit sugars, the simplest carbs. These can link up with each other to form two-unit sugars -- also known as disaccharides -- or polysaccharides, which can be hundreds of units in length. In contrast, amino acids are the basic units of proteins. Approximately 20 types of amino acids act as your body's primary protein building blocks. They can assemble in very complex ways to form helices, pleated sheets, globules or even multi-unit protein structures.
While protein's primary role is structural, carbohydrates primarily serve as an energy source. In fact, glucose -- one of the simplest carbohydrates -- is your body's preferred energy currency. Whenever your body derives energy from protein because of a low supply in carbs, protein components must undergo a number of biochemical changes to be useful in energy production. Proteins serve above all as your body's building blocks. Every cell needs them for structure, but they also play important roles as molecule transporters, hormones, disease-fighting agents and enzymes Some carbs -- namely fiber -- are important for bowel health and waste elimination
Carbohydrates are the major source of energy to our body while proteins are the building blocks of our body.
How the functions of proteins differ from the functions of carbohydrates?The main source of energy of our body are carbohydrates on the other hand, proteins act as the building blocks of our body. Carbohydrates and proteins are important macromolecules. Carbohydrates are composed of simple sugars and proteins are composed of amino acids.
Carbon, hydrogen and oxygen are the main elements of carbohydrates and proteins contain Carbon, hydrogen and oxygen, Sulphur or Nitrogen. Carbohydrates are broken down to make glucose to fuel the body and all enzymes, many hormones and many neurotransmitters are proteins.
As a result, this is how functions of proteins differ from the functions of carbohydrates.
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20 POINTS! FIRST PERSON WHO ANSWERS THIS WILL GET BRAINLIEST, THANKED, AND 5 STARS!
Select Earthquakes and Major Plates on the World Geology map and observe earthquake activity around the South American plate. Based on your observations, what can you conclude about lithospheric motion of the South American plate with the Nazca plate and the African plate? EXPLAIN YOUR ANSWER!
Based on my observations, I can conclude that lithospheric motion of the South American plate with the Nazca plate and the African plate causes the earthquakes to engage nearest to volcanic activity causing it to either erupt the volcano, or increase the damage caused by the volcano.
When the blending of traits occur, it is referred to as the principle of_______.
A. Hereditary
B. Complete Dominance
C. Incomplete Dominance
D. Hybridization
C. Incomplete Dominance
Incomplete dominance
The output force is greater than the input force for a what
Answer:
For a simple machine.
Explanation:
Generally, you would call the instance of having great output force when inputing a smaller force - a mechanical advantage.
Which structures pump the blood from the heart?
ventricles
atria
arteries
veins
Ventricles pump the blood outa heart...
Left ventricle pumps it through aorta to organs
And right ventricle pumps it to lungs to get oxygen
Answer:
Answer: A ventricles
Explanation:
:)
What do a dinosaur in a tree have in common?
They may have shared the same matter.
During the Carboniferous period, plants and animals grew very large due to high concentration of A. oxygen in the atmosphere. B. nitrogen in the atmosphere. C. carbon dioxide in the oceans. D. argon in the oceans .
Answer:
Option A, oxygen in the atmosphere
Explanation:
The highest level of oxygen reached during this phase of the geological cycle of earth. The oxygen level in Carboniferous period accounted for 35% as compared to 21% of oxygen in the atmosphere in present time.
Due to high oxygen content, the giant and wide varieties of terrestrial animal and plant species evolved. For example – size of insects and carwlies increased, plant became extremely giant, increase in number of tree ferns etc.
During the Carboniferous period, plants and animals grew very large due to high concentration of oxygen in the atmosphere and the correct option is option A.
The Carboniferous period is a geologic period and system that spans from 358.9 to 298.9 million years ago in the Paleozoic Era. It is named after the Latin word "carbo", meaning coal, as this period saw the formation of large coal deposits. The Carboniferous period is also known as the "Age of Amphibians" due to the dominance of these animals on land.
During the Carboniferous period, the Earth's continents were slowly coming together to form the supercontinent Pangea. This led to a warm and humid climate, which was ideal for the growth of swamp forests. These forests were home to a wide variety of plants and animals, including amphibians, reptiles, and insects.
Thus, the ideal selection is option A.
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Which of the following statements is true? A. Water heats up and cools down more quickly than land B. In the Southern Hemisphere, most currents flow in clockwise loops C. Wind is caused by the uneven heating of the earth D. The more sunspots on the sun's surface, the cooler the earth's climate
Answer:
The answer is C
Explanation:
Because the earth's surface is made up of different types of land and water, it absorbs the sun's heat at different rates. One example of this uneven heating is the daily wind cycle.
Answer:
C. (Wind is caused by uneven heating of the earth).
Explanation:
Have a good day :)
during one interval of the game of fetch, a dog ran 27 meters in 9 seconds.
What was the dog's speed for this interval of the trip?
A.
0.3 m/s
B.
3.0 m/s
C.
9.0 m/s
D.
30.0 m/s
The formula for speed is: v=x/t, where v is speed, x is distance, and t is time.
v=27/9
v=3
B) 3 m/s
Hope this helps!!
Final answer:
The dog's speed is calculated using the formula speed = distance/time, which gives us a speed of 3.0 m/s for the interval mentioned.
Explanation:
Speed is calculated as distance divided by time. In this case, the dog ran 27 meters in 9 seconds. Therefore, the speed is 27m / 9s = 3m/s.
To calculate the dog's speed for the interval during which it ran 27 meters in 9 seconds, we use the formula for speed which is speed = distance/time. In this case, the distance is 27 meters and the time is 9 seconds.
Speed = 27 meters / 9 seconds = 3 meters/second
Therefore, the dog’s speed for this interval of the game of fetch is 3.0 m/s, which corresponds to option B.
Choose all the answers that apply.
The sun _____.
is the only star in our solar system
is the largest star in the Milky Way galaxy
is made mostly of hydrogen and helium
will continue to release light and heat forever
has a solid core made of iron and nickel
C is the correct answer. > is made mostly of hydrogen and helium
VY Canis Majoris is the largest star in the galaxy, not the Sun.We know the Sun will eventually die, it will not emit light and heat forever.The matter at the Sun's core is plasma, not nickel or iron.Answer:
B, C
Explanation:
B,C
Why does the moon rise and set 50 minutes later each night.
Answer:
The Moon rises and sets every day, like the Sun. ... But the Moon is orbiting around the Earth; every day, it moves eastwards (further left from the Sun) by about 12 degrees. This means that it increasingly lags behind the Sun, by about 50 minutes a day. i hope this helps
Explanation:
Recombinant DNA is a method used in ?
Answer:
Recombinant DNA (rDNA) molecules are DNA molecules formed by laboratory methods of genetic recombination (such as molecular cloning) to bring together genetic material from multiple sources, creating sequences that would not otherwise be found in the genome.
SOURCE FROM: https://en.wikipedia.org/wiki/Recombinant_DNA
Most aquatic organisms can survive only within a specific pH range. An increase in the number of hydrogen ions (H+) in a lake with many aquatic organisms would cause
A.
the acidity of the lake to decrease.
B.
no change in the pH of the lake.
C.
the water in the lake to evaporate.
D.
the acidity of the lake to increase.
Answer:
D. The acidity of the lake to increase
Explanation:
Fun fact: did you know tomatoes are acidic because they have a pH value lower than 7?
Answer:
Option D, the acidity of the lake to increase.
Explanation:
The increase of hydrogen ion in lake water increases the acidity of the lake. The acidity of lake is associated with pH of the water which depends on the hydrogen ions concentration as established by the equation given below –
pH[tex]= - log H^+\\[/tex]
The hydrogen ion concentration is directly proportional to the acidity of the lake water. Thus, higher the H+ ion concentration, the higher will be the acidity of water.
Case study: How Do Beacteria Become Resistant? - Answer key
Answer:
when you don't take care of your self by not eating healthy, not exercising, and smoking or any kind if adult-like thing you see
Explanation
Antibiotic resistance occurs when bacteria change in some way that reduces or eliminates the effectiveness of drugs, chemicals, or other agents designed to cure or prevent infections. The bacteria survive and continue to multiply causing more harm. ... Antibiotics kill or inhibit the growth of susceptible bacteria. hope this helps