Which of the following statements is true?
Capillaries pass oxygen and waste between blood and cells.
Red blood cells fight disease.
People with type O blood can receive AB blood donations.
The left ventricle controls the heartbeat.
Answer: Capillaries pass oxygen and waste between blood and cells.
Explanation: Capillaries are very thin-walled tubes that connect the arteries to the veins. The walls of these tubes are only one cell thick. Capillaries are found everywhere in the body. These thin tubes allow the food, oxygen, and waste to move between the bloodstream and cells. Waste products pass into capillaries and are carried by the veins to be disposed of in other parts of the body. Capillaries are the only blood vessels thin enough for materials to pass back and forth between cells and blood.
Blood Capillaries pass oxygen and waste between blood and cells. Thus option A is correct.
What are the function of blood capillaries?Capillaries are small type of blood vessels where a single red blood cell can barely fit in them.
They involve in the connection of arteries and veins, facilitate the exchange of certain elements between blood and tissues.
They involve in exchange of oxygen, nutrients, and waste between blood and tissues by two major process called passive diffusion and pinocytosis.
In passive diffusion the movement of a substance from the region of higher concentration to the region of lower concentration occur.
In Pinocytosis, intake of small molecules by the cell of the body like fats and proteins.
The capillaries wall are composed up of endothelium which is a thin cell layer called and surrounded by another thin layer called a basement membrane.
Thus option A is correct.
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Why do you think so many people are ignorant on the topic of overpopulation and it's effects? Please answer in one paragraph (: thanks
Answer: Human overpopulation is among the most pressing environmental issues, silently aggravating the forces behind global warming, environmental pollution, habitat loss, the sixth mass extinction, intensive farming practices and the consumption of finite natural resources.
Answer:
I think they are ignorant because they don't understand what overpopulation can do to the world. Meaning overpopulation can cause less jobs for people. Less food to go around.
Explanation:
Humans are unusual because our cultural practices can actually change our environmental circumstances. We can change the environment in which natural selection acts on our traits. Describe how this process has played out in the evolution of adult lactose tolerance. Describe how this process has played out in the maintenance of the sickle-cell trait. Can you hypothesize any similar situations where our future evolution may be influenced by cultural practices we have today
Answer:
Adult humans capable of digesting lactose were selected, thereby this phenotypic trait became common in dairy consuming societies
Explanation:
From the first moment after birth, babies can digest lactose in milk because they produce lactase, which is an enzyme capable of hydrolyzing lactose into glucose and galactose. In human societies that non consume milk products, the level of the lactase enzyme abruptly decreases during the first years of life due to the inactivation of the gene encoding this enzyme (i.e., lactase gene). However, in dairy consuming societies, a genetic mutation in the lactase gene that appeared among early cattle-raising people in Europe was selected, nowadays, this mutation is mostly present (i.e., in a higher frequency) in these societies, thereby adult people is generally adapted to consume lactose-based products.
Digestion of food and batteries are an example of which type of energy?
A. Chemical
B. Kinetic
C. Heat
D. Electrical
Why is caffeine used for heart rate experiments
The body’s internal environment must stay blank
Which statement best explains how the cell membrane helps a cell remove waste
Answer:
A cell's membrane is semi-permiable which means it can let certain fluids in or out and this is how it removes its waste.
Explanation:
What is the periodic table?
Answer:
A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
Explanation:
Which of the following is an aspect of the elastic rebound theory?
a. Energy built up when plates try to get past each other is released when plates break free.
b. Fault zones are often located near major population centers.
C. Earthquakes occurring along subduction zones cause tsunamis.
d. None of the above are aspects of the elastic rebound theory.
Answer:
Energy built up when plates try to get past each other is released when plates break free.
Explanation:
Answer:
A
Explanation:
Edge 2020
Select and Predict In the case of the drought in the deer habitat in question 3,
select a density-dependent factor and predict what effect it will have on the deer
population.
Answer:
Explanation: Which of the following statements regarding the human
population are TRUE? Select TWO.
The world's population of humans is
increasing.
In every country, the human population is
increasing
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant.
Which of the following statements regarding the human
population are TRUE? Select TWO.
The world's population of humans is
increasing.
In every country, the human population is
increasing
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant.
Which of the following statements regarding the human
population are TRUE? Select TWO.
The world's population of humans is
increasing.
In every country, the human population is
increasing
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant.
Which of the following statements regarding the human
population are TRUE? Select TWO.
The world's population of humans is
increasing.
In every country, the human population is
increasing
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant.
Compare What do complex organisms
have that makes them different from simple
organisms?
Answer:
Simple Organism
some simple organisms are made of single cell. Others are made of many cells that are similar
Complex organisms
in complex organisms, cells are organized into tissues, which make up organs. Organs form organ systems.
Explanation: im not sure if its correct but i hope it helps
which of the following muscles is voluntary
A.stmoach
B.tricep
C.heart
D.bladder
The answer would be tricep (B)
Answer:
B. triceps
Explanation:
I know da answer
Are seasonal responses in plants triggered by temperature or by length of daylight
Answer:
Plants don't have sensation of time, at least that we know till now. However plants have different stimuli against the different environmental change i.e lack of water causing yellow and fall of leaves. Such seasonal responses are reaction to environmental changes rather than timeline.
Was being quicker beneficial for the gazelle. Why?
Answer:
A gazelle often chased by cheetahs in the wild, being quicker would be beneficial for that reason.
why clinical thermometer has constriction near the bulb
What is DNA Isolation?
Multiple Choice
copying of the DNA molecule
the extraction of DNA from viruses or cells
the rupturing of the DNA molecule
measuring the DNA molecule for transport
the moving of DNA from one cell to another
Answer:
Explanation:
To late?
Students will identify/understand the Earth’s Atmosphere.
Please help, it’s due today!
Write three paragraphs explaining the atmosphere and layers make up the atmosphere.
Answer:
The atmosphere of Earth is the layer of gases, commonly known as air, retained by Earth's gravity, surrounding the planet Earth and forming its planetary atmosphere.
Explain
You can't always get what you want
well according to my research some kids can
It means that a person wont always get what they wanted and must bear with it and accept it. Almost everyone lacks in owning something so they must just accept it.
Robert eats a burger and drinks a milkshake for lunch. As a result, his blood glucose level increases. His body responds by releasing insulin to bring glucose levels back down. Which organ functions to release insulin?
Stomach
Pancreas
Kidney
Adrenal glands
Humans breathe through bronchi.
Which structure do insects have for breathing?
Answer:
tracheae
Explanation:
Tracheae is a network of tubes where insects breathe through
Answer: tracheae
Explanation:
What are the steps involved in the process of how mRNA is produced during DNA transcription? (Choose all that apply)
initiation
construction
termination
elongation
Answer:
initiation
Explanation:
It involves copying a gene's DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerase, which link nucleotides to form an RNA strand (using a DNA strand as a template). Transcription has three stages: initiation, elongation, and termination.
Answer:
initiation
termination
elongation
Explanation:
I just got 100% on the test :)
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.
Answer:
heyyyyy
Explanation:
In most cases, mutations in the core of a protein that replace a smaller nonpolar side chain in the wild-type (e.g., Ala, Val) with a larger nonpolar side chain (e.g., Leu, Ile, Phe, Trp) in the mutant, result in significant destabilization and misfolding of the mutant. What feature of the protein core explains this observation? Why would such a mutation prevent a protein from folding properly? Match the items in the left column to the appropriate blanks in the sentences on the right.
Explanation:
we are required to fill in the blank spaces in the attachment.
protein side chains are non polar. so the first answer is non polar. These side chains are hydrophobic in nature. so the second blank is hydrophobic. Non polar substances are known to have large number of van der waal forces. the third answer is large and the fourth is vanderwaals contact. the protein core destabilizes only when there is a weakening of vanderwaals contact which brings about mutation.
dear user your answer should look like this:
Interactions of non polar side chains in protein sequence lead to the formation of a tightly packed hydrophobic core. This core is stabilized by a large number of vanderwaals contact. When a mutation occurs, it destabilizes the protein core and weakens vanderwaals contact leading to misfolding
What are some examples of disturbances that lead to secondary succession
Answer:
Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. Many different kinds of disturbances, such as fire, flooding, windstorms, and human activities (e.g., logging of forests) can initiate secondary succession.
Explanation:
Explain how we know organisms evolved, beginning with how complex molecules were first created. At which point must science speculate about how life began? Why is that? Do you think we will ever figure out the missing clues?
Answer:
Untangling the origins of organisms will require experiments at the tiniest ... as scientists are hoping to discover, the path to it cannot be so hard. ... To understand how life might begin, we first have to figure out ... Some scientists think that life originally used simpler molecules and only later evolved RNA.
Explanation:
yes
brainliest plz
Answer:
oof dis is like a whole essay if we anwsered this
Explanation:
Manmade global warming is caused by _______. a. pollution b. water vapor c. farms d. species extinction Please select the best answer from the choices provided A B C D
Answer:
A
Explanation:
Water would be considered an actual renewable resource and actual nonrenewable resource. Thus, option C is correct.
Why water is considered as actual renewable?Water would be considered an actual renewable. A renewable resource is a resource which can be used repeatedly and replaced naturally. Examples include oxygen, fresh water, solar energy and biomass. New resources may include goods or commodities such as wood, paper and leather.
Non renewable energy comes from sources that will run out or will not be replenished in our lifetimes-or even in many, many lifetimes. Non renewable energy sources are fossil fuels: coal, petroleum, and natural gas.
Potential renewable resource, potential nonrenewable resource, and actual renewable resource and actual nonrenewable resource. Water would be considered an actual renewable.
Therefore, Water would be considered an actual renewable resource and actual nonrenewable resource. Thus, option C is correct.
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which event contributed to life evolving on Earth
Answer:natural selection
Explanation:
this DNA strand consists of eight pairs of nitrogenous bases. how many different sequence of eight bases can you make? explain your answer.
Answer:
In the sequence of 8, it would be 4 (possible bases) to the power of 8 because you need to multiply 4, eight times for the number of sequences. Therefore, the answer is 65, 536 possible sequences.
Explanation:
Which of the following structures are found in eukaryotic cells? Check all that apply. endoplasmic reticulum mitochondria nucleoid Golgi apparatus
which of the following structures are found in both eukaryotic cells and prokaryotic cells? check all that apply. nucleus flagella ribosomes DNA nucleoid cell membranes endoplasmic reticulum
Answer:
endoplasmic reticulum, mitochondria, and golgi apparatus
For the second question: flagella, ribosome, DNA, and cell membranes
Explanation:
i got it right :)
Answer:
1st: 1, 2, 4
2nd: 2, 3, 4, 6
Explanation:
trust
The space within a cell which holds water is:
a) nucleus
b) cytoplasm
c) vacuole
d)chloroplast
Answer:
[tex]\boxed {\tt C. \ Vacuole}[/tex]
Explanation:
Let's analyze each answer choice.
A. Nucleus
Houses the genetic material (DNA) and produces RNAB. Cytoplasm
Fills in space, keeps organelles in place, and chemical reactions occur hereC. Vacuole
Stores substances, isolates toxins, helps with excretionD. Chloroplast
Photosynthesis occurs hereBased on the functions of each organelle, we can assume the best answer is C. Vacuole. Vacuoles store substances, so these organelles would hold water.