29. An investigation was carried out into competition between two species of grass,
Bromus madri-
tensis and B. rigidus. Equal numbers of seeds of B. madritensis were sown in a number of different
pots. In each pot, an equal number of seeds of B. rigidus was then sown a different number of
days after B. madritensis. The results are shown in the graph below.
Given that the total dry mass of plant material was the same in each pot, summarize the main
conclusions that can be drawn from this investigation. Suggest an explanation for the results
when the delay before sowing B. rigidus was 30 days.
100-
80
60-
Percentage
contribution of
B. madritensis
to total dry mass
after 45 days
40
20-
0
0
20
30
10
Delay before planting B. rigidus/days
Answers
the Paper says 12:16:20 which is proportinate
to said ratio, hence the answer is B
The competition that exists between Bromus madritensis and B. rigidus is for food, sunlight and space.
What is biological competition?Biological competition refers to the interaction between two or more organisms of the same or different species in which both require a common resource that is in limited in their environment.
The effect of the competition between the two species of grass,
Bromus madritensis and B. rigidus is illustrated I. the graph.
Based on the graph, it can be seen that after a delay of 30 days, Bromus madritensis contributed to almost 100% of the total dry mass of the grass after 45 days.
This suggests that the available space and nutrients have been taken up completely by Bromus madritensis.
Therefore, the competition that exists between Bromus madritensis and B. rigidus is for food, sunlight and space.
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Related Questions
What does biodiesel produce in higher amounts? biodiesel produces higher amounts of .
Answers
Biodiesel produces greater amounts of benefits in its use than fossil fuels.
Is biofuel better than fossil fuels?Burning biodiesel generates 98% less sulfur, which is responsible for acid rain and respiratory problems, 78% less greenhouse gases and 50% less particulate matter (black smoke), which is also responsible for respiratory problems.
In addition, biodiesel has a cetane number equivalent to diesel (same detonating or self-igniting effect), has an average oxygen content of around 11% and has a higher flash point than conventional diesel.
With this information, we can conclude that biodiesel produces greater amounts of benefits in its use than fossil fuels.
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Answer:
nitrous oxide
Explanation:
pls help :( will give brainliest if right
Which of the following correctly describes a positive way in which hydrogen fuel cell technology can affect environmental quality or way of life?
a. It can be used to create zero-emission vehicles.
b. It can only be used without combining with other energy resources.
c. It has a low cost and many fueling stations for vehicles.
d. It is easy to store safely and distribute globally.
Answers
Answer:
the answer is D:)
Explanation:
it is easy to store safetly and distribute globally.
Good luck on your test!
Which solution would most likely cause a plant placed in it to become firmer and more rigid?
hypertonic
hypotonic
isotonic
osmotic
Answers
Reason: For a plant to become more rigid, it has to take in water. This process is called Osomosis.
Which is a structure that directs the cell's activities?
nucleus
Golgi apparatus
ribosome
mitochondrion
Answers
Nucleus controls cell’s activities by controlling the synthesis of proteins, Golgi apparatus involves in the secretion and intracellular transport of a cell and Ribosome helps the synthesis of proteins only
Select the correct answer. mathew claims that people should invest in alternative sources of energy rather than burning fossil fuels. he has put together two graphs as evidence. the first compares how human use of fossil fuels affects atmospheric carbon dioxide levels, and the second shows how land-ocean temperatures on earth have changed over time. which statement correctly supports his claim based on evidence from the graphs? a graph showing the increasing trend of carbon emissions from 1800 to 2004, a graph showing the increasing trend of annual mean temperature from 1880 to 2015 a. more carbon in the atmosphere likely absorbs more heat energy, thus increasing the temperature. b. petroleum should replace natural gas, since it releases less carbon dioxide. c. burning coal does not contribute to a rise in carbon dioxide or temperature. d. carbon dioxide emissions from burning fossil fuels has decreased over time. e. the graphs show no possible correlation between burning fossil fuels and increasing temperatures.
Answers
The evidence from the graphs is that more carbon in the atmosphere is likely to absorb more heat energy, thus raising the temperature.
Why does carbon raise the temperature?The feature is important because the effect of sunlight on the Earth's surface, including the oceans, is reflected in the form of infrared rays. By absorbing this radiation, the gases heat up the entire atmosphere as if they were a blanket that keeps the planet warm.
Whit this information, we can conclude that the evidence from the graphs is that more carbon in the atmosphere is likely to absorb more heat energy, thus raising the temperature.
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Answer:
See below !! :)
Explanation:
45
What do vaccines contain?
A: Dead or weakened versions of pathogens
B: Live pathogens
C: Antibiotics
C
D:
Antibodies
Answers
Answer:
A
Explanation:
The whole purpose of a vaccine is to expose your body to what the disease would feel like if you actually had it so your body builds up an immunity to the bacteria, virus, etc. Obviously they won't put the disease at its full form in the vaccine because you'll get sick and not build an immunity, so they must put in a weakened version of the disease in the vaccine. That's your answer.
The digestive and cardiovascular systems work together to provide nutrients for cells. Evaluate each of the statements. Select ALL Three of the choices that accurately explain interactions between these two body systems.
A The digestive system eliminates carbon dioxide from the circulatory system.
B The circulatory system transports oxygen to the organs of the digestive system.
C The digestive system provides glucose to the circulatory system for transport to tissues.
D The circulatory system transports absorbed nutrients from the small intestine to the cells.
E The circulatory system carries wastes from the digestive system to the kidneys for elimination.
Answers
The three statement that explains the interaction between digestive system and cardiovascular system include.
The circulatory system transports oxygen to the organs of the digestive system.The circulatory system transports absorbed nutrients from the small intestine to the cellsThe digestive system provides glucose to the circulatory system for transport to tissues.What is digestive and cardiovascular system?Digestive system is the system of the body that comprises of organs like small intestine,mouth, gall bladder and so on which help to break down complex food into small pieces that can easily be absorbed by the body.
Cardiovascular system is the system that comprises of the heart and vessels like capillaries,veins , arteries which pump and move blood from the heart to all parts of the body.
Therefore, The three statement that explains the interaction between digestive system and cardiovascular system include.
The circulatory system transports oxygen to the organs of the digestive system.The circulatory system transports absorbed nutrients from the small intestine to the cellsThe digestive system provides glucose to the circulatory system for transport to tissuesLearn more about digestive system below.
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How did the bacteria population become more resistant in Addie and our community?
Answers
Answer:
it's due to global warming and the increasing of population
also some how deforestation also
Answer: The environmental change put selection pressure on the population of the bacteria so that some trait variations had a competitive advantage for surviving over time.
Explanation: So, in Addie’s case, the environmental change was the antibiotics. The antibiotics led to the weaker bacteria to die off while the stronger bacteria reproduced and grew larger in population. This is called selection pressure. So to sum it all up, the bacteria population became more resistant because of the pressure selection out into them by the antibiotics. So, the weaker bacteria died off and the stronger one grew larger and larger, becoming antibiotic resistant. Sorry if I’m too late but I hope this clarifies your question!
In eukaryotic cells, transcription occurs in the _________ while translation occurs in the __________
Answers
what happens if u lose brain cells
Answers
Answer:
If you actually began losing brain cells then you could begin to have difficulties with motor and other skills. It may affect your nervous system, or pretty much anything else in your body depending on which ones you lose, meaning that your body may stop functioning properly. You may lose your ability to remember things or perform everyday tasks. It is true that some neurons die as people age because of the waste they accumulate that causes them to lose their function and degenerate. This can affect some elderly people by appearing as conditions like Alzheimer's, Dementia, or Parkinson's. While this is a natural event, some injuries or damage to the brain due to accidents, or the use of substances, cause destruction or deterioration in younger, healthier brains.
In a car accident, Jane suffered a chest injury that resulted in impaired breathing and respiratory acidosis. How will her body compensate for this imbalance?
Answers
Her body will compensate for this imbalance, trying to get more oxygen from the environment, making her breathe harder for a balance between carbon dioxide and oxygen in the bloodstream.
What is respiratory acidosis?When breathing is deficient, which can lead to hypoventilation, the transfer of CO2 to the outside is reduced and its concentration increases in the blood, decreasing blood pH. if a picture of acidosis.
With this information, we can conclude that her body will compensate for this imbalance, trying to get more oxygen from the environment, making her breathe harder for a balance between carbon dioxide and oxygen in the bloodstream.
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The urinary bladder is composed of ________ epithelium. A) transitional B) simple squamous C) stratified squamous D) pseudostratified columnar
Answers
The urinary bladder is composed of transistional epithelium.
What is Urinary bladder?.The urinary bladder is a muscular sac that is composed of transitional epithelium and it is located in the pelvis between the pubic bone. When the bladder is empty,It has the size a pear. Urine produced by the kidneys move ureters to the bladder. The bladder stores urine, allowing urination to be well managed.
The transitional epithelium contain multiple cells that changes shapes.
Therefore, The urinary bladder is composed of transitional epithelium
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Which form of cell division results in an enlarged germ cell pool?.
Answers
Mitosis form of cell division marks in an enlarged germ cell pool, Mitosis is a procedure where a single cell splits into two identical daughter cells (cell division).
What is mitosis and meiosis?There are two kinds of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the procedure of making new body cells.
Meiosis is the kind of cell division that creates egg and sperm cells. Mitosis is a actual procedure for life.
Thus, Mitosis form of cell division marks in an enlarged germ cell pool, Mitosis is a procedure where a single cell divides into two same daughter cells.
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What problems do human population growth cause for the environment?
Answers
Answer:
with today's increasing population the environment is getting severely affected as the needs of our increasing at a rapid speed but the sources of the needs are in spite decreasing we need more and more space to build houses setup industries factory out farming and hands we clear our forest is the main reason for almost every adverse effect to the environment. more the population the more the luxuries needed, hence we would be exploiting the environment more and more.
extensive needs but comparatively less resources and hence we start to exploit it in every way
What is the flow of energy of the following organisms? Birds, plants, bacteria. What is this
called?
Answers
Answer:
trophic or energy pyramid
Explanation:
brittanica
The ______ is a highly branched system of air conducting passages that originates from the left and right primary bronchi and progressively branches into narrower tubes ending in terminal bronchioles.
Answers
Answer:
the answer is Bronchial tree
Over time, species can evolve new traits and behaviors that increase reproductive success. These are called _________.
Answers
Which system transports nutrients from the digestive system through out the body
Answers
Answer:
Circulatory system
Explanation:
The circulatory system is one of the eleven organ systems of the human body. Its main function is to transport nutrients to cells and wastes from cells
Primary purpose of circulatory system is to transport blood throughout the body by circulating
This is more of a psychology question but why does the mind procrastinate and what helps it stop?
Answers
people procrastinate because they're avoiding something they know will make them emotionally unpleasant by doing that task, so instead, they do something that provides a temporary mood boost. Procrastination itself causes shame and guilt, leading people to procrastinate even further.
your physical abilities rely a lot on your mental strength, if you feel like you've been procrastinating, try doing things to boost your overall mental health.
The movement of water from high to low concentration across a semipermeable membrane is best defined as:.
Answers
The movement of water from high to low concentration across a semipermeable membrane is best defined as Osmosis.
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A species of rodent lives in a moist forest
climate. Over time, the elimate becomes drier
and more desertlike, Which adaptation would
most likely improve the chances that the rodent
species
could survive as its environment
changes?
A. having dark hair and small ears
B. living above ground in damp areas
C. being able to eat only one type
of berry
D. being able to eat plants that survive in the
changed environment
Answers
The possibility that a rodent species may have survived because of a change in its environment that is capable of eating plants that survive the changed environment. So, the correct option is (D).
What is Adaptation?Adaptation is defined as the process by which a species adapts to its environment as a result of natural selection acting on variation over many generations.
Organisms are adapted to their environment in their structure, physiology, and genetics, in their locomotion or dispersal, in their means of defense and attack, in their reproduction and development, and in other respects.
It is described as the ability of an organism to adapt to its environment and change through time, referring to the term "adaptation theory", known as the "survival of the fittest" idea. In this instance, rodents become able to eat plants that survive the changed environment.
Thus, the possibility that a rodent species may have survived because of a change in its environment that is capable of eating plants that survive the changed environment. So, the correct option is (D).
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Write 2-3 sentences to show your understanding of how the following words connect together in the water cycle: Evaporation, Condensation, Precipitation, Freezing, Melting
Answers
The water cycle is responsible for the regulation of temperature in our surroundings. It modifies the weather and causes rain. It is important for the circulation of various minerals throughout the environment.
What do you mean by the Water cycle?The water cycle may be defined as the continuous process by which water is circulated throughout the earth and the atmosphere through evaporation, condensation, precipitation, vaporization, etc.
Evaporation: It is a process through which water changes its liquid state into a gaseous or vapor state. It is the first step of the water cycle.
Condensation: It is the opposite as compared to evaporation. It involves the process of water vapor changing back into liquid water.
Precipitation: This process is responsible for the rain to occur. It involves the gathering of water vapor to synthesize bigger and bigger droplets of water.
Freezing: Freezing is responsible for the formation of ice in glaciers, at low temperatures, etc. It involves the process of changing liquid water into a solid form.
Melting: This process is just the opposite of freezing. Hence, it involves the transformation of a solid form of water which is ice into a liquid form.
Therefore, it is well described above.
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A person is dehydrated and goes to the hospital. What would happen to the patient’s
red blood cells if they were rehydrated with an IV of distilled water?
a. The blood cells will take up water, swell, and eventually burst.
b. The blood cells will expend ATP for active transport of NaCl into the
cytoplasm.
c. Water will leave the cells, causing them to shrivel and collapse.
d. NaCl will be exported from the red blood cells by facilitated diffusion.
Answers
Answer:
Explanation:
I think a, I'm not to sure. Sorry if it is wrong.
Nerves that send messages from the body to the brain are called ________, whereas nerves that carry messages from the brain to the body are called ________.
Answers
what is the dif between dirt and soil
Answers
Answer:
The distinction major between soil and dirt, however, is that soil has a variety of organic components, ranging from dead leaves to living earthworms, whereas dirt is completely devoid of life and contains no organic components.
What are 2 controlled variables in this science experiment? If you answer something that makes sense, I'll give you brainliest!
Answers
Answer:
The amounts of the earth materials, and the height of the box on the ramp.
Explanation:
Hope it assists!
A scientific study by a pesticide company claims that a new pesticide for spraying tomatoes is both highly effective and safe. The company claims that while pests are killed, the product is entirely safe to humans. At this point, what can a consumer know for certain about the validity of the company's claims?
A) No pesticide is safe for human consumption, so the claims are not reliable.
B) Additional studies will be the reliability check for the claims.
C) Since the company performed the scientific study it is reliable.
D) The company is not biased because the primary goal of companies is safety.
Answers
Answer:
B) Additional studies will be the reliability check for the claims.
At the given point, the consumer should know for certain about the validity of the company's claims a s additional studies will be the reliability check for the claims. The correct option is B.
What is a pesticide?Pesticides are used to control a wide range of pests and disease carriers, including mosquitos, ticks, rats, and mice.
Pesticides can have both acute (short-term) and chronic (long-term) health effects, which can occur months or years after exposure.
A claim is a debatable argument that generally states a fact rather than an opinion.
It focuses on an argument that defines your goal and the scope of your thesis. Its primary goal is to support and prove your main point.
The consumer should know for certain about the validity of the company's claims at this point, as additional studies will be the reliability check for the claims.
Thus, the correct option is B.
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WHOEVER RESPONDS FIRST WILL BE MARKED BEST.
A student grew flowering plants next to one another in the school greenhouse. Some of the plants had yellow flowers, while some had white flowers. When these plants produced seeds, the student planted them. All the new plants that sprouted from the seeds had yellow flowers.
Which of the following best explains why the new plants only had yellow flowers?
A. None of the seeds from the white plants sprouted.
B. The new plants inherited dominant genes for yellow flower color.
C. The soil the plants were in caused the flowers to turn yellow.
D. The new plants received more sunlight than the parent plants.
Answers
Answer:
B. is the answer.
Yellow(Yy) is a dominant allele, and although white(ww) is inherited from the parent gene, Yy, white is a recessive gene. That means it is most unlikely to be visible through phenotype(term for visible characteristics).
What is the role of oysters as a sustainable food source?
A: Oysters filter 50 gallons of ocean water a day
B: Zero inputs are needed to grow oyster populations.
C: Oysters reducing ocean acidity by removing nitrogen.
D: Shellfish sequester more carbon than land-based plants.
Answers
Answer:
The answer is B: Zero inputs are needed to grow oyster populations.
Explanation:
I took the test and got it correct
Which example best illustrates a method to show differences among earth’s layers? carson models how the continental crust varies in thickness. marisol records atmospheric and oceanic temperatures at several beaches. eliza analyzes seismic wave activity from an earthquake using a computer model. oscar determines the pressure at different depths of earth’s crust.
Answers
A method to show differences among earth’s layers is "oscar determines the pressure at different depths of earth’s crust." Option D.
What are earth’s layers?Generally, the four earth layers are the
The outer crust.The mantle.The liquid outer core.The solid inner core.In conclusion, the mineral content of rock core samples at different depths in Earth's crust are the differences among earth’s layers.
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Answer: I think its D
Explanation: