Students filled two beakers with 500 mL of water each. They placed three drops of live algae culture into each of the beakers, then used a dissolved oxygen sensor to measure the oxygen content of the water in each beaker. The students then stirred 5 mL of nitrogen-rich fertilizer into one of the beakers, and labeled the beaker A. Nothing was added to the second beaker, which the students labeled B. Both beakers were placed under a high-intensity light over a weekend. On Monday, the students measured the amount of oxygen in the water of each of the beakers. Which aspect of the watershed were these students trying to model?

A. The effect of fertilizer-contaminated surface water flowing as runoff into a waterway

B. How stagnant or non-flowing water can result in providing a habitat for living organisms such as algae

C. The inverse relationship between water, light, oxygen, and photosynthesis

D. How light and oxygen levels in water affect the growth of algae within a system over time

Answers

Answer 1

D. How light and oxygen levels in water affect the growth of algae within a system over time


Related Questions

Would it be justified to call Kreb's Cycle the central wheel of metabolism? Why? Provide two specific pieces of evidence to support your answer.

Answers

Answer:

Yes.

Explanation:

Kreb's Cycle is considered as the central wheel of metabolism because the fuel molecules are oxidized ultimately within the Krebs Cycle and its intermediates are used for various biosynthetic pathways. The main function of the Kreb's cycle is to produce electron carriers that can be used in the cellular respiration for producing energy molecules in the form of ATP. without Krebs's cycle, the cell produces only two ATP molecules which very low.

What long tube around the kidneys, carries eggs in females?
(Frogs) please help

Answers

Answer:

The vocal sac is open to the mouth cavity of the frog, with two slits on either side of the tongue. To call, the frog inflates its lungs and shuts its nose and mouth. Air is then expelled from the lungs, through the larynx, and into the vocal sac.

Explanation:

What characteristics do you think an animal would have in order to survive in the savanna environment?

Answers

Answer:

The type of biome that is made up of scattered  grasses  and small  tress and shrubs is called the savannah. The ecosystem consisting of small community of plants and animal on a large piece  of land is  is called a biome.

Because the tress are small and scattered this  enable the  grasses to thrive in the savannah. They are located in the hot and warm climate across the world with the annual rainfall of 50.79 to 127 cm  per year. This is estimated t be about 100 '' of rainfall per year .This is fall within certain months, and there may be  fire outbreaks  when the rain  stops or in droughts.

Therefore lack of moisture is the  features of the savannah. Plants and animals in this terrestrial biome must develop  adaptive features for water conservation to survive with little  exposure of the  to heat and sunlight to prevent excessive dehydration.

The plants have narrow leaves to reduce the  surface area to volume ratio exposed  for transpiration and evaporation of moisture

some have underground stem and root for storing starch and water.

Cactus is an example of plant with thick stem to conserve water ,and spikes to prevent been eaten by herbivores

The animals have good stamina to withstand dehydration, and are less  active duding the day to conserve body water, and do reduce exposure to the hot and arid environment.

Elephants has wrinkle skin to reduce water loss ,and large ears to dissipate heat.

Explanation:

In order to be considered an adaptation, a trait must increase the individual's?
-Fitness
-Strength
-Height
-Range

Answers

Strength

strength is needed to become a more dominant species.
Strength, think of it as you can’t GAIN height from any trait just as you can’t gain range or fitness. You can gain strength

How does eutrophication affect an aquatic ecosystem

Answers

Answer:

Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants, depletion of fish species, general deterioration of water quality and other effects that reduce and preclude use”.

Explanation:

Answer:

It prevents sunlight from reaching aquatic life below the water’s surface.

Explanation:

Got it right on PLATO

write the interrelationship between orbanization and
Sustainable development​

Answers

Answer:

A sustainable urbanization means not only a conversion of the environment without modifications in agricultural land and forest to turn them into cities; it is about radical changes in the shape, economy, demography, and metabolism of urban ecosystems.

Question 12 of 15
A__ is a device that allows a car to use hydrogen gas to operate.

Answers

Explanation:

fuel cell is the correct answer.

A true-breeding yellow pea plant is crossed with a true-breeding green pea
plant, and all the offspring are yellow. What is the most likely genotype of the
offspring assuming a single gene trait?
А, уу
B. YY
C. Yy

Answers

Answer:

c maybe

Explanation:

not really sure but I had this question I think B

que es un nucleótido??

Answers

Explanation:

Nucleotides are organic molecules consisting of a nucleoside and a phosphate. They serve as monomeric units of the nucleic acid polymers deoxyribonucleic acid and ribonucleic acid, both of which are essential biomolecules within all life-forms on Earth

Which of the following was from the Flemish timeframe (era)?

O Created arrangements using a single flower
O striped/flame colored tulips were popular
O used daffodils as a form of currency
O Daffodils were traded similar to current day "stocks"

Answers

Answer:

Striped/flame colored tulips were popular

Explanation:

I took the test and said I got it right plus in this typical time colored tulips were used for many things besides them being in ponds

Modern humans are the product of evolutionary processes which have occurred over millions of years . True or false?

Sorry for all of this, I’m having trouble with these questions!

Answers

Answer:

True to an extent.

Explanation:

Modern humans are the product of evolutionary processes. This is true to some extent.

What is evolution?

Evolution is defined as the theory in biology that various types of plants, animals, and other living things on Earth evolved from other preexisting types and that distinguishable differences are the result of modifications in successive generations.

There are basically four types of evolution.

Divergent evolutionConvergent evolutionParallel evolutionCoevolution

Humans are one of the best example of evolution.

Thus, modern humans are the product of evolutionary processes which have occurred over millions of years. This is true to some extent.

To learn more about evolution, refer to the link below:

https://brainly.com/question/13492988

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Pathogens are transmitted directly:

a. From contaminated surfaces

b. In food or water

c. By vectors

d. Through blood​

Answers

A

They can be spread through skin contact, bodily fluids, airborne particles, contact with feces, and touching a surface touched by an infected person.

HELP RIGHT NOW PLZZZZZZZZZZZZZZ

Answers

Answer:

I think the answer is C

Explanation:

genes located inside or outside of the DNA molecule?
PLEASE HELP

Answers

Answer:

The DNA that contains your genes is stored in your cells in a structure called the nucleus.

Explanation:

What life form was the first on earth?

bacteria

amphibians

land plants

dinosaurs

Answers

bacteria was the first life form :)

Question 7 of 30
Which term describes the process by which nations become more connected
through communication, trade, and the exchange of ideas?
A. Globalization
B. Specialization
O C. Desertification
O D. Deforestation

Answers

I believe the answer is globalization ^^

Answer:

The term that will mostly describes the process which nations become More connected through communication, trade and the exchange of ideas is Globalization.

What could contribute to a mass extinctions event

Answers

Answer:

1/ Climate change

2/ Asteroid impacts

3/ Massive volcanic eruptions

4/ Sun explodes

etc. (all the things above are most likely to happen but alien invasion or things like that is also a theory that you can add depends mostly if you like it or not)

Why do plants have trouble growing in space?

Answers

Answer:

The first challenge in growing plants in space is how to get plants to grow without gravity. This runs into difficulties regarding the effects of gravity on root development, providing appropriate types of lighting, and other challenges

Answer:

because, The first challenge in growing plants in space is figuring out how to get them to thrive in the absence of gravity. This presents difficulties in terms of the impact of gravity on root growth, as well as the provision of adequate lighting and other issues.

Explanation:

Gravity has an impact on root formation, but the scientists discovered that their space plants didn't need it to thrive. The space flowers showed common root growth patterns such as "skewing," where roots slant slowly as they branch out, when grown on a nutrient-rich gel in transparent petri plates.

Owl
Fox
Snake
Rabbit
Mouse
Frog
Squirrel
Grasshopper
Grass
Seeds
In this food web, which organism is an omnivore?

Answers

Fox, squirrel, and grasshopper.

If wrong I’m sorry
Answer: Grasshopper

Muscle tissue that is attached to what is skeletal muscle

Answers

Answer:

tendons

Explanation:

Skeletal muscles are attached to bones by tendons, and they produce all the movements of body parts in relation to each other. Unlike smooth muscle and cardiac muscle, skeletal muscle is under voluntary control.

How is the environmental problem caused by humans? Describe the specific human activity that causes this problem.


Your response should be about 2-4 sentences long, or it may be written as bullet points

Answers

Answer:

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.

Explanation:

sana po makatulong

Put these items in order from largest to smallest, make sure to watch the video.

Answers

Protein, genes, chromosomes and DNA

During lunar eclipses, light from the sun is blocked by Earth and cannot
reach the moon.*
a. true
b. false

Answers

Answer:

A. True

Explanation:

Answer:

b)false

Explanation:

when it is a lunar eclipse it is because the moon covers the sun not the earth to the sun that is why it is false

Indoor air pollution has increased as improvements have been made in
A) heating and air-conditioning systems
B) radon-resistant construction techniques
C) energy conservation in the home
D) green building construction
E) all of these choices contribute to indoor air pollution

Answers

Answer:

A) heating and air conditioning systems

Explanation:

I say A because the rest of the choice are promoting good ways to decrease global warming, and if you don't have as many harmful gases in the air you wont have them in your building.

e2021

Heating and air-conditioning systems increase indoor air pollution.

Heating and air conditioning systems use a large amount of energy, electricity production increased, which emits more carbon dioxide into the atmosphere.

What is indoor air pollution?It is the dust, dirt, or gases in the air inside buildings such as home or workplace that could be harmful to breath in. Poor quality has been linked to lung disease like asthma etc.

Hence , A) option is the correct answer.

To know more about pollution here

https://brainly.com/question/23857736

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In a certain species of insect, some individuals have flattened white disks on their bodies that protrude and interlock, resembling an orchid flower. This adaptation provides the insect with a better opportunity to capture its prey. If environmental conditions remain unchanged, it is most likely that, in future generations, the proportion of the population with this adaptation will

Answers

His offspring will have the same traits

Answer:

A) increase only

Explanation:

this adaptation will benefit these species, therefore, increasing the population

Select the correct answer.

Mangrove trees can only survive in moderately saline water. What are such organisms called?

A. Euryhaline
B. Stenohaline
C. Mesohaline (incorrect)
D. Polyhaline
E. Oligohaline

(I took the test and put C and got it incorrect)

Answers

I believe the answer is A

✎﹏☾✦☁️❣️ Briefly explain the process of photosynthesis .❣️☁️​

Answers

Answer:

hope this will help u

Explanation:

photosynthesis is the process in which plant make their own food with the help of sunlight,water and carbon dioxide. water and carbon dioxide are raw materials in photosynthesis because they help to prepare their food.During photosynthesis, plants take in carbon dioxide and water from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.

Explanation:

PHOTOSYNTHESIS

This is a process in which green plants and other organisms make their own food from simple inorganic substances which are sunlight ,CO2 and chlorophyll.

Which of the following is a true statement about reproduction?
A. Sexual reproduction requires two individuals from the same species; two males, two females, or a male and a female. B. Asexual reproduction requires two individuals from the same species—two males, two females, or a male and a female--to produce offspring. C. Sexual reproduction requires a male and a female gamete. D. Asexual reproduction requires a male and a female from the same species.

Answers

A . sexual reproduction requires two individuals from the same species, a Male and a female

but sexual reproduction refers to the union of a Male and a female

Any organism that eats other animals.
otros animales.


1. Carnivore
2. Food wed
3. Energy pyramid
4. Mutualism

Answers

Answer:

1. Carnivore

Explanation:

Answer:

1 Carnivore

It only eats meat

Stars are hot objects and give off heat and light. Scientist can collect this energy and tell what two things about stars (even though we cannot observe or measure the star directly).



a.composition


b.temperature


c.exact mass


d.shape

Answers

Answer: A or c

Explanation:

Stars are hot objects and give off heat and light. Composition and exact mass are the things about stars.

What is Stars?

A star is the most well-known celestial object and the main building block of galaxies. The age, distribution, and composition of a galaxy's stars can be used to determine the galaxy's history, dynamics, and evolution.

In addition, stars generate and disperse heavy elements like carbon, nitrogen, and oxygen, and their characteristics are strongly tied to those of any planetary systems that may develop around them.

The study of the origin, development, and death of stars is thus at the heart of astronomy.

Therefore, Stars are hot objects and give off heat and light. Composition and exact mass are the things about stars.

To learn more about Stars, refer to the link:

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