A group of students is trying to grow a kelp plant in a tank without any others animals. They use a temperature regulation system to keep the water temperature at about 12°C. They bury the holdfast below the soil that has been enriched with nutrients and place the plant near a window in direct sunlight. However, over a few weeks the kelp plant withers and dies. Why did this happen?

Answers

Answer 1
Kelp is very sensitive to temperature change. Placing the plant near the window and exposing it to direct sunlight will result in continuous warming of the water in which the kelp plant is growing. Research has shown that kelp plant degrades very quickly when temperature increases due to tissue loss.
Answer 2

I have read the question several times and I believe "A.The kelp draws nutrients from the water rather than the soil, which it does not have available." would actually be your answer.

Although it is true that kelp is temperature sensitive, the question states that "They use a temperature regulation system to keep the water temperature at about 12°C." So even with the added addition of sunlight, I think the temperature still stays generally the same. And as long as the temperature is between 5-20 C degrees, the kelp should be okay.

However, kelp does not work the same as most land plants, kelp does not have a root system. It instead has a "holdfast" anchoring system that does not transport nutrients. So how does kelp get nutrients? From the water directly. Since the question says nothing about nutrients in the water, and directly talks about nutrients in the soil, we can assume that their is no nutrients in the water (only in the soil). Making A our answer.

I know the question is old, but this is for anyone who still needs the answer.


Related Questions

If volume remains the same while the mass of a substance ________, the density of the substance will_______________.

Answers

I think the correct terms to fill in the blanks are increase and increase or it can also be decrease and decrease. If volume remains the same while the mass of a substance increase, the density of the substance will increase or the opposite would also be true. Density is the ratio of the mass of a substance and its volume. So, we can see that density and mass are directly related so that when one increases, the other would also increase or if one decreases, the other one would also decrease.

Which of these Earth spheres interact with oceans during beach erosion?

geosphere
hydrosphere
cryosphere
atmosphere

Answers

The Earth sphere that interact with oceans during beach erosion is the hydrosphere. Below the atmosphere is the hydrosphere. This is where all liquid forms are located. And since the seawater has a greater mass than air, it has the greatest pressure. The first layer of the atmosphere is the troposphere, is where we are able to do most of our activities. This is where we can see the formation of clouds, the production of rain, hail, snow and other weather phenomenon. Also, this layer is where the greatest amount of air pressure because most of the molecules of air are in this area. Like us, air has also mass and the pressure is brought down by the earth’s gravity causing an increase in weight exerted on you as you descend lower into the atmosphere. So, as you enter into the other layers of atmosphere above the troposphere, the air pressure starts to decrease. 

Answer:

Its not Hydrosphere

Explanation:

I took the test and got it wrong :(

Answer these 2 questions please

Answers

question 19 = all the molecules are different lengths ( last answer)


question 20 = crossing over

describe the four organelles in eukaryotes that are involved in making, organizing, and delivering proteins. describe the role of each organelle and the order of the sequence of this process

Answers

Final answer:

In a eukaryotic cell, the nucleus, ribosomes, rough endoplasmic reticulum, and Golgi apparatus work together in sequence to synthesize, fold, modify, and transport proteins to their required locations.

Explanation:

The eukaryotic cell utilizes various organelles to produce, organize, and deliver proteins. Four main organelles are involved in this process:

Nucleus - Contains genetic material (DNA) and operates as the control center for the cell, dictating which proteins need to be synthesized by transcribing DNA into messenger RNA (mRNA).

Ribosomes - Where protein synthesis begins as they translate the mRNA into a polypeptide chain, which will become a functional protein.

Rough Endoplasmic Reticulum (RER) - As mRNA is translated by ribosomes on the RER's surface, the emerging protein is folded and undergoes initial modifications.

Golgi Apparatus - Receives proteins from the RER, processes them further through modifications, and then sorts and packages them into vesicles for transport to their final destinations.

These organelles coordinate in a specific sequence to ensure proteins are efficiently made and distributed where they are needed.

when an automotive battery is fully charged the sulfuric acid and water mixture will have specific gravity of about?
A. 2.5 B. 1.0 C. 0.15 D. 1.3

Answers

Just took the test it is D. 1.3

The correct answer is (d) 1.3

Specific gravity can be defined as the ratio of the substance density which has to be compared to the density of a standard usually it is water. If the specific density of water is 1 and the specific density of sulfuric acid is 1.835 which means that sulfuric acid is 1.835 times heavier than water. The electrolyte of a storage battery is a mixture of sulfuric acid and water.The specific gravity of sulfuric storage battery changes with amount of electrical charge.

Hence, by mixing both water and sulfuric acid the specific gravity of automotive battery is kept 1.3 at 80°F.





According to selye (1956, 1976), the _____ phase of the general adaptation syndrome is responsible for the person making efforts to cope with the threat.

Answers

According to Selye (1956, 1976), the resistance  phase of the general adaptation syndrome is responsible for the person making efforts to cope with the threat.
There are three phases in the Hans Selye's General Adaptation Syndrome (GAS). The first one is the Alarm (organism becomes mobilized to meet the threat) . The second is Resistance, and the third is the Exhaustion (it occurs
if organism fails to overcome threat).

Changes in the density of the white matter in the corpus callosum may also underlie the advances seen in _____ during late childhood.

Answers

Final answer:

The changes in the density of the white matter in the corpus callosum during late childhood may underlie advances in cognitive skills.

Explanation:

The changes in the density of the white matter in the corpus callosum during late childhood may underlie advances in cognitive skills. The corpus callosum is a structure that connects the two hemispheres of the brain and is responsible for communication between them. As the density of white matter increases in the corpus callosum, there is improved connectivity between brain regions, allowing for more efficient neural communication and information processing.

Although the brain's early development is in large part genetically directed, its structure is continually modified by environmental experiences and this modifiability is called

Answers

"Neuroplasticity", "brain plasticity", or (sometimes) simply "plasticity".
Final answer:

Neuroplasticity refers to the brain's ability to modify its structure in response to experiences and environmental interactions. Neural pathways develop and adapt, influencing behavior and cognitive development. This lifelong adaptation involves aspects of epigenetics, which are changes in gene expression due to environmental factors.

Explanation:

The modifiability of the brain's structure in response to environmental experiences is referred to as neuroplasticity. Barraged by experiences and environments, the brain undergoes a process of forming new synapses, cutting off unused ones, and making changes at cellular levels. The interactions between different neural pathways, changes can result in modifications to behaviors, understanding of the world, and cognitive development. The phenomenon of changes in gene expression due to environmental factors, or epigenetics, is another important point to highlight. These changes aren't just limited to early development, but continue throughout life as part of the brain's response to the environment.

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What would happen to the egg white if a raw egg were placed in vinegar?

Answers

If you put a raw egg in vinegar the egg shell will disolve and will leave the whole inside rubbery. This happens from acetic acid. Acitic acid is used as a solven in rubber, plastic, it is the chief acid of vinegar

The study of how genes are transferred from the parents to their children is known as

Answers

The answer is Genetics

While both systems maintain homeostasis, how does the nervous system differ from the endocrine system?

Answers

Nervous system is much more systematic because the impulses are passed as messages through the neurons. The process and the response are very rapid. Endocrine system, on the other hand, is wide range. The process is slow and the effect is long-lasting.

A nurse is providing community education regarding risk factors for ovarian cancer. identify five (5) risk factors associated with the development of ovarian cancer. (review the med surg rm)

Answers

These are the risk factors associated with the development of ovarian cancer:
1. Over 40 years of age.
2. First pregnancy after 30 years of age.
3. Family history of cancer.
4.High fat diets
5. Endometriosis.
6. History of heavy bleeding.
All these factors increase the probability of having the disease.

There are several risk factors associated with the development of ovarian cancer including genetic predisposition, reproductive history, age, endometriosis, and hormone therapy. Understanding and mitigating these risks can help reduce the likelihood of developing ovarian cancer.

Identifying risk factors for ovarian cancer is central to understanding how to reduce the chances of developing this disease. Here are five significant risk factors:

Genetic Predisposition: A family history of ovarian cancer or inherited genetic mutations, such as BRCA1 or BRCA2, can significantly increase the risk.Reproductive History: Women who have never been pregnant or had full-term pregnancies after 35 may have an increased risk.Age: The risk of ovarian cancer increases as women get older, with most cases occurring in women after menopause.Endometriosis: Having this condition can elevate the risk of developing ovarian cancer.Hormone Therapy: Long-term use of hormone replacement therapy, particularly estrogen alone, has been linked to a higher risk of ovarian cancer.
Reducing exposure to these factors, when possible, may lower the risk of developing ovarian cancer. For example, genetic counseling and testing for those with a strong family history can inform potential preventive measures. Other recommendations for prevention include maintaining a healthy diet and weight, considering the risks of hormone therapy, and discussing possible prophylactic surgeries with a healthcare provider if there is a significant genetic risk.

________ indicates kidney pathology because it is not found in urine normally. glucose sodium urea nitrogen

Answers

I think the correct answer would be the first option. Glucose indicates kidney pathology because it is not found in urine normally. Normal components of urine are urea, sodium, potassium, phosphate, sulfate, uric acid and traces of calcium, magnesium and bicarbonate. Glucose or sugar is not usually found in urine. So, when a test is done and sugar is present, this would mean there is something wrong. Base from studies, when the level of blood sugar rises above the normal level which happens when one has type 1 or 2 diabetes the kidney would tend to release the excess glucose from the blood to the urine.

Which of these examples best illustrates the importance of biodiversity in biotechnology?

Answers

Although you have not provided the list of examples, I am writing some critical implications for biodiversity in biotechnology.
Biotechnology is used to conserve various significant species
It is essential for efficient utilization of resources by characterizing and identifying the species that are useful to mankind.
Biodiversity is critical to the availability of various types and varieties of crops 

?a warming climate can lead to worldwide sea level change. this is an example of a(n) ____________ change in that it can be measured all over the world.

Answers

The answer is:  "global" .
______________________________

Where the highlighted vessel bifurcates there are structures that monitor co2 and o2 concentration in the blood. what are these structures called?

Answers

The structures that monitor CO2 and O2 concentration in the blood at the site of vessel bifurcation are called chemoreceptors.

Carotid Bodies:

These are small clusters of chemoreceptors located near the bifurcation of the common carotid artery, typically on both sides of the neck.

They are sensitive to changes in the levels of oxygen, carbon dioxide, and pH in the blood.

Aortic Bodies:

The aortic bodies are another set of chemoreceptors situated near the aortic arch, which is a major bifurcation point for blood vessels.

They are responsive to similar changes in blood chemistry, detecting alterations in oxygen, carbon dioxide, and pH levels.

The chemoreceptors present in these areas continuously monitor the blood passing through these vessels. They are particularly sensitive to changes in arterial blood gases, including oxygen and carbon dioxide levels.

When there is a deviation from normal levels, these chemoreceptors send signals to the brain, primarily the medulla oblongata, to regulate breathing and maintain appropriate gas exchange in the lungs.

This regulatory mechanism helps to ensure that the body receives sufficient oxygen and removes excess carbon dioxide, crucial for maintaining acid-base balance and supporting overall physiological functions.

The chemoreceptors' ability to promptly respond to changes in blood chemistry contributes to the body's ability to adapt to various physiological conditions, such as exercise, altitude changes, or respiratory distress.

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Final answer:

The structures that monitor the concentration of carbon dioxide and oxygen in the blood are chemoreceptors. These are mostly found in the aortic and carotid bodies and communicate changes in the levels of oxygen, carbon dioxide, and hydrogen ions (pH) to the cardiovascular and respiratory centers in the brain.

Explanation:

The structures that monitor carbon dioxide (CO2) and oxygen (O2) concentration in the blood at the site where the highlighted blood vessel bifurcates are called chemoreceptors. These can primarily be found in the aortic and carotid bodies, which are closely situated to the baroreceptors in the aortic and carotid sinuses. These chemoreceptors contribute to vascular homeostasis by monitoring levels of oxygen, carbon dioxide, and hydrogen ions (pH). They communicate changes in these levels to the cardiovascular center and the respiratory centers located in the medulla oblongata of the brain. As per the Bohr effect, an increase in CO2 concentration or a decrease in pH or O2 concentration in the blood would stimulate these chemoreceptors to induce corrective measures, primarily through altering the respiration rate.

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A. What was the average number of tropical storms per season for the time period 2005-2014? B. What was the average number of hurricanes per season for the time period 2005-2014?

Answers

The correct answer is : The average number of tropical storms per season for the time period 2005-2014 was 19 and the average number of hurricanes per season for same period was 9 and major was 4.

What is called tropical storms?

If the circulation continues to intensify and the wind speeds exceed 63 km (39 miles) per hour, then the system is called a tropical stormOnce the maximum wind speed exceeds 119 km (74 miles) per hour, the storm is classified as a tropical cyclone.

What is called hurricanes ?

Tropical cyclones with maximum sustained surface winds of less than 39 miles per hour (mph) are called tropical depressions. Those with maximum sustained winds of 39 mph or higher are called tropical storms. When a storm's maximum sustained winds reach 74 mph, it is called a hurricane.

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Final answer:

To find the average number of tropical storms and hurricanes per season from 2005-2014, sum up the total number of events over the 10 years and divide by 10. The specific averages depend on real data from meteorological records.

Explanation:

To answer the question regarding the average number of tropical storms and hurricanes per season from 2005-2014, we would first need data specifying the total numbers of tropical storms and hurricanes for each year within that timeframe. Since specific data is not provided within the question, I’ll guide you through the general approach to calculating averages.

Firstly, you would sum up the total number of tropical storms (or hurricanes) that occurred over the 10-year period. Then, divide that sum by the number of years (10 in this case) to find the average per year. The formula for the average (‘A’) would look like this: A = Total Number of Events / Number of Years.

For example, if there were 150 tropical storms in total from 2005 to 2014, the average number of tropical storms per season would be calculated as follows: 150 (total tropical storms) / 10 (years) = 15. Thus, the average would be 15 tropical storms per season. Apply the same method to calculate the average number of hurricanes per season.

Note that the actual average would depend on the specific totals for each year, so you would need to consult meteorological records to obtain the precise numbers for tropical storms and hurricanes during 2005-2014.

Study the figure below and predict which of the following components would best indicate the overall biotic health of an aquatic ecosystem?


A.) Particulate amounts
B.) Sedimentation rates
C.) Species abundance
D.) Water quality

Answers

“Water quality” is the traditional physico-chemical indicator which indicates the overall quality of a given aquatic ecosystem.

The water quality indicator includes the temperature, pH, dissolved oxygen, nutrients like phosphorus and nitrogen, and salinity of the aquatic ecosystem.

It also indicates the levels of toxicants like metals, herbicides, insecticides and other harmful chemicals.


Which statement could be categorized only in the anaerobic section of the Venn diagram?
is performed by eukaryotes
has commercial uses
regenerates NADH
occurs in the mitochondria

Answers

The answer is B

has commercial uses

The right answer is has commercial uses

Five major groups of economically important ferries were found:

*Microbial cell or biomass as a product,

*Microbial Enzymes:

*Microbial metabolites:

*Combined products:

*Vital Transitions:

One of the requirements of the fermentation process is to provide a growth medium, since any microbe requires water supply, oxygen, an energy source, a source of carbon, a source of nitrogen, and micronutrients for growth.

PLEASE HELP!!! Which of the following is created when the sun pushes the ionized gases of a comet away from the central core?

Coma

Nucleus

Plasma tail  <-- my answer

Solar wind

Answers

The correct answer is C. Plasma Tail.

Answer:

Plasma tail

Explanation:

A comet is a body in space which revolves around Sun in elliptical orbit. It is composed of rocks, dust, ice and frozen gases. A comet has mainly three parts:

Nucleus- It is the core of the comet which is solid.

As the comet nears the sun, the frozen gases start sublimating. An atmosphere surrounds the nucleus which is known as coma.

As the comet approaches the sun closely, the coma extends backwards due to solar wind. The solar wind pushes the ionized gases of the comet away from the nucleus. This is known as tail. There are two tails - dust tail and  plasma tail. Plasma tail is composed of ionized gases -heavier than the dust tail and thus lies below it.

Over time, why does natural selection continue to work? A.) Environments are always changing B.) Animals are continually mating. C.) Organisms are always improving. D.) Genes are constantly mutating.

Answers

A
I would say because natural selection selects the traits that would help the organism survive in their environment.

Answer:

The correct answer would be A.) Environments are always changing.

Natural selection is one of the natural phenomenons which causes the evolution of the organisms.

By this phenomenon, the organisms which are better suited to the changing environment tend to survive and reproduce at a better rate as compared to the organisms which are less adaptive to the environment.

Natural selection mainly depends on the environment (such as temperature, pressure, color et cetera) and thus, it continues to work as the environment keeps on changing.

For example, the temperature and levels of oceans are increasing due to global warming, so, the marine organisms which are better adapted to the changing temperature, pressure, and salinity would survive and reproduce more.

Gram for gram, which provides the most energy? carbohydrates proteins alcohol fats

Answers

carbohydrates. they're what give you energy. 

Fats provides the most energy than the carbohydrate and protein.

Energy provided by fat, carbohydrate and protein

Fat provides 9 calories per gram.

Carbohydrate and protein both provides 4 calories per gram of it.

Hence, fats provides the most energy of all the macronutrients.

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give an example of a scientific question that could be investigated by and experiment

Answers

Do molecules move faster when they are hotter? This could be investigated by heating water and making cold water and dropping dye in. In hot water, it would move throughout faster, while cold water would go slow. Hope this helps! ;)

Whith regard to gender difference s in coping strategies, male is to female as fight or flight is to

Answers

With regards to gender differences in coping strategies, male is to female as fight or flight is to TEND AND BEFRIEND. Men and women have different strategies in coping with stress; men usually exhibit the fight or flight tendency while women exhibit the tend and befriend tendency.

name two processes that add to the genetic diversity of humans

Answers

I'm sure there are many processes that add to diversity, but the ones that stand out to me would be meosis, natural selection, mutation, random mating.
Natural selection, meiosis, random mating, and mutation

Which part of the cell functions specifically to help in cell division?
A. Centrioles
B. Chloroplasts
C. Cilia
D. Central vacuole

Answers

Centrioles help create spindle fibers for cell division.

The answer is:
A. Centrioles 

Centrioles help create spindle fibers for cell division. So, the answer must be Centrioles.

The _____________ makes(s) up most of the VOLUME of an atom.


Answers

the electron cloud. most of atom is empty space.
The empty space makes up most of the volume of an atom. 

Muscle contraction that results in a change in joint angle is called

Answers

Muscle contraction that results in a change in joint angle is called concentric contraction.
This contraction occurs when enough force that can overcome the resistance applied is developed by the muscle where this force developed is larger than the force of the resistance applied.

Mendel studies seven different traits in the garden pea. what genetic term is used to describe an observable trait, such as those studied by mendel?

Answers

The genetic term used to describe an observable trait is phenotype. More specifically phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

The ____________ urethra is a short segment that passes through a reproductive organ. it receives secretions from two ejaculatory ducts.

Answers

The answer is PROSTATIC urethra. It is the proximal portion of the urethra which begins from the urinary bladder and passes through prostate gland. The urethra is divided into a long and short segment called the penile urethra and prostatic urethra respectively. 

Prostatic Urtehra is the answer to this question.

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