ey's Bell Jar...
Abstract
Background
Photosynthesis maintains aerobic life on Earth, and Joseph Priestly first
demonstrated this in his eighteenth-century bell jar experiments using mice and
mint plants. In order to demonstrate the fragility of life on Earth, Priestley's
experiment was recreated using a human subject placed within a modern-day
bell jar.
Methods
A single male subject was placed within a sealed, oxygen-depleted enclosure
(12.4% oxygen), which contained 274 Cz and C plants for a total of 48 h. A
combination of natural and artificial light was used to ensure continuous
photosynthesis during the experiment. Atmospheric gas composition within the
enclosure was recorded throughout the study, and physiological responses in the
subject were monitored.
Results
After 48 h, the oxygen concentration within the container had risen to 18.196, and
hypoxaemia in the subject was alleviated (arterial oxygen saturation rose from
86% at commencement of the experiment to 99% at its end). The concentration
of carbon dioxide rose to a maximum of 0.66% during the experiment.
Conclusions
This simple but unique experiment highlights the importance of plant life within
the Earth's ecosystem by demonstrating our dependence upon it to restore and
sustain an oxygen concentration that supports aerobic metabolism. Without the
presence of plants within the sealed enclosure, the concentration of oxygen
would have fallen, and carbon dioxide concentration would have risen to a point
at which human life could no longer be supported.

Answers

Answer 1

Answer:

heyyyyy

Explanation:


Related Questions

Pyrite breaks down rocks in which of the following processes? A. Deposition/ B chemical weathering/ C. Erosion/ D. Physical weathering?

Answers

Answer:

I think physical weathering

Explanation:

Answer:chemical weathering

Explanation:

A liquid's resistance to flow is called
viscosity.
Odensity
O pressure.
O tension.

Answers

Answer:

Viscosity

Explanation:

Ive had this question on quizzes many times. And viscosity was the answer.

describe the process of building a paradigm and of shifting one

Answers

Answer:

Explanation:

A paradigm shift is a major change in the concepts and practices of how something works or is accomplished.

A paradigm shift very often happens when new technology is introduced that radically alters the production process of a good or service.

Although the idea of paradigms has been around for quite some time, the concept was explored by physicist and philosopher Thomas Kahn Kuhn.

identify the remaining processes and componets of the carbon cycle

Answers

Answer:

Carbon is one of the most vital element for the existence of life. The carbon cycle is the one in which the carbon is transferred from the atmosphere to the living organisms i.e both plants, animals and to the earth and again back into the atmosphere, thereby maintaining a cyclicity.

Explanation:

Different kinds of substances have different properties. Compare and contrast the electrical properties of salts, metals, and acids.​

Answers

Salts do not conduct electricity while metals and acids do. , thus there are no charge carriers to carry electrical charges. ... which results in free mobile ions in solution allowing for charge conductivity.

What are the adaptations that Embryophytes have for life on land?​

Answers

Answer:

Explanation:

"Plants have evolved several adaptations to life on land, including embryo retention, a cuticle, stomata, and vascular tissue."

Explain how the fungus affects the role of both xylem and phloem

Answers

Answer:

A fungus role is to break down dead or decaying organisms in the environment, the fungus may try to steal its nutrients and affect the specific roles that xylem and phloem operates.

Explanation:

What animal phylum do leeches belong in?

Answers

Answer:

What animal phylum do leeches belong in?

Explanation:

Leeches are segmented parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract.

Answer:

Annelida

Explanation:

"Leeches are segmented parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract."

Scientific name: Hirudinea

Phylum: Annelida

Kingdom: Animalia

Which of the following is NOT one of the potential mechanisms allowing kin recognition among animals? Group of answer choices kin-differential spatial association, so that kin are reliably found in a given place phenotype matching, whereby kin are identified through comparison of their phenotypic attributes with those learned from reliable kin, including oneself kin-differential familiarization, whereb social familiars are treated as relatives. kin-branding, whereby all individuals are labeled actively by each other at birth so that kin can be discriminated from nonkin. genetic similarity detection, whereby phenotypic labels are correlated with one's underlying genotype, allowing for kin discrimination based on that.

Answers

Answer:

The correct answer is "kin-branding, whereby all individuals are labeled actively by each other at birth so that kin can be discriminated from nonkin".

Explanation:

Kin recognition, also known as kin detection, is an ability developed by some animals to detect organisms that are genetic related and discriminate among other animals that are not (nonkin). There are some mechanisms that animals use for kin recognition, however labeling actively each other is not one of them. In most cases, animals use kin recognition based on pheromonal cues.

Identify the basic components that make up the structure of the plasma membrane

Answers

Answer:

The principal components of the plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrate groups that are attached to some of the lipids and proteins.

Explanation:

Which action is designed to increase the safety of a person carrying a microscope from one place to another?

Answers

Answer:

wrapping the electrical cord around the arm of the microscope

Explanation:

a. a lipid molecule
b. an indicator
c. an ADP molecule
d. an enzyme

Answers

Answer:

D. .................................

Idk what to ask bruh?

Answers

Answer:

._. Bruh

Explanation:

Answer:

b.r.u.h

Explanation:

oof

Dwayne is making a cladogram using a diagonal line.



Where should he place the least primitive organism?

E
A
B
D

PLEASE HURRY I REALLY NEED HELP BEFORE MY TEST!!!

Answers

Answer:

the  answer is e on the test

hope this helps

Dwayne is making a cladogram using a diagonal line. He should place the least primitive organism in E. The correct option is A.

What is a cladogram?

Diagrams are called cladograms to show the relationships between various taxonomic groups known as "clades." Cladograms reconstruct the taxa's evolutionary history (phylogeny) by showing these relationships. Phylogeny and trees are other names for cladograms.

Using the term "cladogram" emphasizes to some biologists that the diagram represents a hypothesis about the true evolutionary history of a group, whereas "phylogenies" represent true evolutionary history.

A cladogram's root, clades, and nodes are its most important components. The root is the first ancestor shared by all groups that branched off from it.

Therefore, the correct option is A, E.

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

https://brainly.com/question/27405768

#SPJ2

What's an invasive species?
A. A native species that begins to displace other local species
B. A species that invades an area because it has run out of space in the neighboring area
C. A species that's naturally expanding its range
D. A species that's introduced to a place where it's not native and then becomes widespread and competes with local species for the available resources

Answers

I believe the answer would be D

Where does the oxygen needed for aerobic respiration come from?

Answers

Glucose and oxygen react together in cells to produce carbon dioxide and water and releases energy. The reaction is called aerobic respiration because oxygen from the air is needed for it to work.

Which energy sources could provide energy to run an electric vacuum cleaner or power the lights in a football stadium?
POSSIBLE
solar, hydroelectric, and nuclear
geothermal, wind, and biomass
neither A or B
both A and B

Answers

Answer ::

solar,wind,biomass

Groups of cells work together as tissue. Groups of tissues from organ systems. True or False​

Answers

Answer:

True

Explanation:

Answer:false

Explanation:

how do endangered animals affect the earth?

Answers

Answer:

Explanation:

When a species becomes endangered, it is a sign that the ecosystem is slowly falling apart. Each species that is lost triggers the loss of other species within its ecosystem. Humans depend on healthy ecosystems to purify our environment.

Different species of heterotrophic unicellular organisms such as amoeba and Actinobacteria are found in freshwater sources. The feature that distinguishes amoeba from Actinobacteria is the —

a) presence of ribosome
b) ability to maintain homeostasis.
c) ability to reproduce.
d) presence of a nuclear membrane.

Answers

Answer:

A

Explanation:

         

Answer:

B

Explanation:

HELP FAST PLEASE. Vacuoles in different organisms and cell types typically have different compositions and functions. Which of the
following pairs are most similar in composition and function?
•central vacuoles in plant cells and food vacuoles in amoebas that store sugar
•contractile vacuoles in unicellular eukaryotes and central vacuoles in plant cells
•contractile vacuoles in unicellular eukaryotes and small storage vacuoles in plant cells
•food vacuoles in amoebas and lytic vacuoles in plants that contain hydrolyzing enzymes

Answers

Answer:

The answer is B

Explanation:

Jus took the test on edgenuity

Answer:

Food vacuoles in amoebas and lytic vacuoles in plants that contain hydrolyzing enzymes

why it is better to use a broad-spectrum sunscreen

Answers

Answer:

broad-spectrum sunscreen protects you from both. UVA rays can prematurely age your skin, causing wrinkling and age spots. UVB rays can burn your skin. Too much exposure to UVA or UVB rays can cause skin cancer.

the concept of doing whatever it takes to make sure our planet continues to support life as we know is called ​

Answers

Answer:

The answer would be Photosynthic

Explanation:

Because of its water, Earth is home to millions of species of plants and animals. The things that live on Earth have changed its surface greatly. For example, early cyanobacteria changed the air and gave it oxygen. The living part of Earth's surface is called the "biosphere".

Most flowers are supported upright by:
a) soft cell walls
b)stiff cell membranes
c)woody cellulose stems
d)osmotic pressure

Answers

a.) soft cell walls.
is the answer

Answer:

Most flowers are supported upright by:

A. soft cell walls

B. stiff cell membranes

C  woody cellulose stems

D. osmotic pressure

Explanation:

D. osmotic pressure

Which of the following is an example of a question technology can solve?
A.Why does the heart beat?
B.Why does lightning strike?
C.How can we make an artificial heart?
D.Why do geese fly south for the winter?

Answers

C. How can we make an artificial heart

Answer: b

Explanation:

Place the following in order from smallest to largest: nucleotide,nucleus, cell, double-helix, DNA-histonecomplex, chromosome, gene

Answers

Explanation:

cell,double-helix,gene,nucleus, nucleotide,chromosome

Which statements best describe plasmas? Check all that apply.
Plasmas have a definite volume.
Plasmas can change shape.
Plasmas contain ionized particles.
Plasmas are abundant on Earth.
Plasmas are good insulators.

Answers

Answer:

Plasmas can conduct electricity

Plasmas are created when a lot of energy is applied to a gas.

Plasmas contain ions and free electrons.

Explanation:

edge 2021

Statements best describe plasmas are:-

Plasmas can conduct electricityPlasmas are created when a lot of energy is applied to a gas.Plasmas contain ions and free electrons.

What is plasmas?Plasma is superheated matter  so hot that the electrons are ripped away from the atoms forming an ionized gas. It comprises over 99% of the visible universe. In the night sky, plasma glows in the form of stars, nebulas, and even the auroras that sometimes ripple above the north and south poles.

To know more about plasmas here

https://brainly.com/question/17336820

#SPJ3

Brain cells, which depend on glucose for energy, use the glucose transporter GLUT3, which has a Km of 1.5mM. Liver cells, which store glucose (as glycogen) after a meal and release glucose between meals, use the glucose transporter GLUT2, which has a Km of 15mM. Calculate the rate (as a % of Vmax) of glucose uptake in brain cells and in liver cells at circulated glucose concentrations of 3mM (starvation), 5 mM (normal levels), and 7mM (after a carbohydrate-rich meal). Use this rearranged M-M equation.

Answers

Answer:

Explanation:

Given that:

The brain cell which uses glucose transporter GLUT3 Km = 1.5 mM

The liver cell which stores glucose GLUT2 Km = 15 mM

The objective is to calculate the rate (as % of Vmax) of glucose uptake in brain cells and liver cells under starvation conditions.

Using the M-M equation i.e Michaelis- Menten equation;

[tex]Rate = \dfrac{V_{max}* [S]}{[S]+K_m}[/tex]

By rearrangement

[tex]\dfrac{Rate}{V_{max}}= \dfrac{[S]}{[S]+K_m}[/tex]

where;

[tex]V_{max}[/tex] = maximum velocity of a reaction

Thus; the rate as a % of Vmax of glucose uptake in brain cells is calculated as:

[tex]\dfrac{Rate}{V_{max}}= \dfrac{[3 \ mM]}{[3 \ mM]+1.5 \ mM}[/tex]

[tex]\dfrac{Rate}{V_{max}}= \dfrac{3 \ mM}{4.5 \ mM}[/tex]

[tex]\dfrac{Rate}{V_{max}}=0.667[/tex]

[tex]\dfrac{Rate}{V_{max}}=66.7 \%[/tex]

the rate as a % of Vmax of glucose uptake in liver cells is calculated as:

[tex]\dfrac{Rate}{V_{max}}= \dfrac{[3 \ mM]}{[3 \ mM]+15 \ mM}[/tex]

[tex]\dfrac{Rate}{V_{max}}= \dfrac{3 \ mM}{18 \ mM}[/tex]

[tex]\dfrac{Rate}{V_{max}}=0.166[/tex]

[tex]\dfrac{Rate}{V_{max}}=17 \%[/tex]

Thus, the uptake is larger brain cells due to the fact that the brain cells GLUT3 have higher tendency to attract glucose.

Do you think that in the human species, there are psychological traits such as empathy, aggression, intellect, imagination, etc. are more common characteristics of one sex rather than another?

Answers

Answer:

each sex has these traits, but with some, like aggression, I feel can be more "biased", so to speak, to the male sex

Explanation:

What types of gases do you find in the atmosphere?

Answers

Oxygen, Nitrogen, Argon, and carbon dioxide

Answer:

Nitrogen — 78 percent

Oxygen — 21 percent

Argon — 0.93 percent

Carbon dioxide — 0.04 percent

Trace amounts of neon, helium, methane, krypton and hydrogen, as well as water vapor

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