why the circulatory system is considered to be a closed system?
Explanation:
human have closed circulatory system. this means blood is always enclosed in the vessels and the heart while circulating throughout the body IN this type of system blood is pumped by heart through arteries and veins and does not fill the body cavities thats why the circulatory system is considered to be a closed system
The arrangement of leaves on a tree branch that reduces overlapping and overshadowingof leaves from sunlight is referred to as leaf …………………………………………………………This ensures exposure of most of the leaves to sunlight for maximum ……………………………………………..to take place in the ………………………………………………………………………of leaf cells. The grana contains numerous……………………………………………molecules which trap light………………………………….for ………………………………………………….of water, producing ………………………………………atoms required for the process of carbon (IV) oxide…………………………………………………………in the light……………………………………………………………stage of photosynthesis which takes place in the……………………………………………..of the chloroplast.
Answer:
phyllotaxy
photosynthesis
chloroplasts
chlorophyll
energy
oxidation
oxygen
reduction
independent
stroma
Explanation:
The arrangement of leaves that provide maximum exposure to sunlight is referred to as leaf phyllotaxy that reduces overlapping and overshadowing of leaves and supports maximum photosynsthesis.
The contains numerous chlorophyll molecules that trap the light energy for the oxidation of water and producing oxygen (O2) atoms required for carbon (IV) oxide reduction in light-independent, which takes place in the stroma of the chloroplast.
Hence, the correct answer in a sequential manner is as follows:
phyllotaxy
photosynthesis
chloroplasts
chlorophyll
energy
oxidation
oxygen
reduction
independent
stroma
I need help im not understanding what to do.
For this assignment, you'll be creating a document or project. Now that you have an idea of the organ systems in the human body, it’s time to choose one that interests you the most. Use the links below to find detailed information about the organ system you choose. You will use this information to create a poster in Glogster or PowerPoint that illustrates the major facts and details of the system you chose. To make it fun and interesting, create a “ Travel Guide” that takes the reader through the system, detailing the organs in that system and what they do for the body.
To complete this assignment follow these steps: Choose your organ system to profile. Research the following information about your organ system: Short description of the organ system: What does the “organ system” do? (IE: endocrine system) How is the system organized? What are the major organs in this system? What is the main or most important organ in the system? How do these organs work together to do what they do? What are the functions in the human body that are done by this organ system? What would happen to the body if this organ system “failed”, or didn’t work right? Use the links to websites to gather that information. Save any graphics you want to use in creating your Poster.
If you choose Glogster: Go to Glogster and follow their instructions in setting up an account. It’s easy and it’s free. Watch the tutorial and then get started!
Answer: Here's a power point on the endocrine system. I hope this helps.
Explanation:
What are the three basic parts of the cell theory?
Answer:
Answer
Explanation:
All living things are composed of cells.
Cells are the basic units of structure and function for living things.
All cells come from pre-existing cells. Also, organisms grow by “adding on more cells” NOT by increasing the size of their cells.
The three basic parts of the cell theory are:
All living things are made of cells.
Cells come from preexisting cells.
All cells have the same basic parts.
How do we explain?Cells are the basic unit of life. All living things, from the smallest bacteria to the largest redwood tree, are made up of cells.
Cells are not created spontaneously. All cells come from the division of preexisting cells.
Despite their great diversity, all cells have the same basic parts, including a plasma membrane, cytoplasm, and DNA.
The cell theory was first proposed by Matthias Schleiden and Theodor Schwann in the 1830s. It has since been supported by a vast body of evidence from cell biology. The cell theory is one of the most important and fundamental concepts in biology.
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In 1998, scientists discovered that the expansion of the universe has been accelerating.
What force is causing this phenomena?
dark energy
Hubble's law
the Doppler effect
background radiation
Answer:
Option A (dark energy) is the right answer.
Explanation:
A hypothetical supplier of power that creates a force that contradicts gravity, which is assumed to have been the catalyst of accelerated universe development. Hypothetically, dark energy counteracts the kinetic energy including its beginning of the globe, meaning that perhaps the multiverse does not have intrinsic curvature, although observational measurements presently indicate.Some other three choices have no relation to the particular situation. Thus option A would be the right solution.
Answer:
A
Explanation:
please help asap
Which statement describes the damage that results from earthquakes?
A: Amount of damage can be used to determine intensity.
B: Damage can be measured using the Richter scale.
C: The amount of damage increases as magnitude decreases.
D: Earthquakes that cause maximum damage are the most common.
Answer:
option c is correct
Explanation:
The statement that describes result from the activities of Earthquake is C: : The amount of damage increases as magnitude decreases.
An earthquake can be regarded as outcome of release of stored energy , which is released suddenly into the Earth's crust and as a result of this seismic waves is created.Earthquake do occur by displacement of the ground or by shaking the Earth's surface, Some of other results of earthquakes are;damage to bridgescause tsunamisinitiation of slope failuresloss of life However, as the earthquake is in action and as the damages increase, then there would be a decrease in it's magnitude.Therefore, option C is right because as its magnitude decrease, then the damage will increase.
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What do you mean by clean water?
Answer:
it means water not polluted, without dangerous bacteria, trash and something like this
The Peppered moth is white with black spots, which helps it blend in with the bark on beech trees. The burning of coal in Great Britain caused many beech trees to become black with soot. Over time, the Peppered moth became all black in order to blend in with the new bark color. What type of example is this? homeostasis metabolism organization adaptation
Answer:
adaptation
Explanation:
Adaptation in Biology refers to the process whereby an organism adjust to its natural environment in order to increase its chance of survival or in other words, the organism becomes better suited to its natural habitat by possession of some adaptive features.
In this example, a white peppered moth with black spots initially possess these color combination in order to blend to its natural environment, which is the bark on beech trees. However, due to the burning of coal in Great Britain which caused many of the beech trees to be black, the peppered moths had to ADAPT to this change in environmental color by becoming all black in order to blend in with the new bark color.
Therefore, this is an example of ADAPTATION.
Answer:
adaptation
Explanation:
4. What happens when an enzyme is denatured? I
Answer:
in the air
Explanation:
poop
PLEASE HELP ME I'LL MAKE YOU BRAINLIEST!!!!!!!!!! Lichens can best be described by which of the following? a) autotrophic organisms and fungi in a mutualistic relationship b) photosynthesizing fungi that can live in harsh environment conditions c) saprophytic fungi that secretes acids to grow on and colonize rocks d) two heterotrophic fungi species that thrive on nutrients from the air
Answer:
a) autotrophic organisms and fungi in a mutualistic relationship
Explanation:
A lichen "is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species".
It is cyanobacteria + fungi, so it has to be two separate groups, and both cannot be fungi.
Your question has been heard loud and clear.
answer is option C , lichens do colonize on rocks most of the time , this is because they really are saprophytic fungi , that secrete acids to melt and make the rocks suitable for growing on.
Which of these statements can be predicted with the help of science
Answer:
Something that can be tested, or rationalized.
Explanation:
You didn't give any statements to choose from, so I'll give you a rule of thumb. When finding a scientific statement, make sure it's something like "The tide is higher at noon than it was at 3 am." and not "Your dog is itchy, so that means a bad storm will arrive."
You are the lucky student of a wacky professor who develops a time machine. He asks if you will test it with him. You get in and there is an immediate glitch–the date readout fails so that when you land you are not sure what era you are in. As your time machine lands, you see an unusual landscape before you. As you open the door you realize you cannot breathe. You quickly shut the door, realizing you are in the _____.
1) Archaean eon
2) Cambrian period
3) Cenozoic era
4) Mesozoic era
Answer: Option 1 is the correct answer
Archaean eon
Explanation:
You are in the Archean Eon era because the it was early in the Archean that life first appeared on Earth. The most two earlier of the formal divisions of Precambrian time (about 4.6 billion to 541 million years ago) and the period when life first formed on Earth It began about 4 billion years ago with the formation of Earth’s crust and enlongated to the begining of the Proterozoic Eon 2.5 billion years ago; the latter is the second formal division of Precambrian time.
In the Archean eon there are unsual landscapes no rocks are preserved from this stage. The earliest terrestrial materials are not rocks but minerals.
Throughout the Archean, oceanic and island arc crust was produced semi-half way.
You cannot breathe because there was no oxygen on the Earth. Oxygen was only present in compounds such as water and chemical reactions change to carbon containing molecules that form simple living cells that does not require oxygen.
what is biology definition in details
Answer:
Biology :[tex]<font color=green>[/tex]
the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behaviour, origin, and distribution.
[tex]<font color=pink>[/tex]
#Be Brainly
Answer:
The word biology is derived from the greek words /bios/ meaning /life/ and /logos/ meaning /study/ and is defined as the science of life and living organisms. An organism is a living entity consisting of one cell e.g. bacteria, or several cells e.g. animals, plants and fungi.
Hope this helps! :D
Identify the interaction used to describe each type of interdependence among organisms. _______Having too many fish in a pond can limit the amount of food and space available. _________ The cheetah population depends on the gazelle population for food the answer choices are predation and competition
Having too many fish in a pond can limit the amount of food and space available is Commensalism.
The cheetah population depends on the gazelle population for food Mutualism.
What are the three major types of interactions among organisms?There are 03 main types of interchange among organisms:
Competition, Predation, and Symbiosis.Thus, Commensalism and Mutualism is the correct answer.
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Answer:
Identify the interaction used to describe each type of interdependence among organisms.
✔ competition
Having too many fish in a pond can limit the amount of food and space available.
✔ predation
The cheetah population depends on the gazelle population for food.
Given the relationships identified above, determine what would happen to the populations under the following circumstances.
✔ increase
If the cheetah population decreases, what would happen to the gazelle population?
Explanation:
Which two organisms are most closely related, based on the tree above?
Answer:
dinosaurs and birds
Explanation:
Help!!
How are all forms of asexual reproduction similar?
A. The offspring have identical DNA to the parent.
B. The offspring have different DNA than the parent.
C. They all require two parents to reproduce.
D. The offspring have diversified DNA in order to survive
Also explain why the answers are correct/incorrect.
Answer:
Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent. This type of reproduction occurs in prokaryotic microorganisms (bacteria) and in some eukaryotic single-celled and multi-celled organisms
Hope this helped!!!!
Answer:
Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent.
So A.
B. incorrect because they have the same DNA
C. incorrect because They do not need 2. it produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent.
D. incorrect because They do not have diversified DNA
Which of these is NOT an example of biting and chewing insect?
(A)
Locust
(B) Grasshopper
(C)
Aphid
(D) Termite
(E)
Answer:
C aphid is the answer for that question
Answer:
yes
Explanation:
explain the gaseous exchange in lungs
Answer:
Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
Hope it helped u if yes mark me BRAINLIEST!
Tysm!
Answer:
breathing allows the exchange between 2 gases: oxygen and carbon dioxide. Gas exchange occurs in millions of lung alveoli and the capillaries that surround them
Explanation:
You are studying flower color and find that purple flowers are dominant to white flowers. When a certain purple flowered plant was self pollinated, its progeny consisted of 76 purple and 25 white flowered plants. What was the genotype of the original purple flowered parent?
Answer:
dsi
Explanation:
sdf
In the database, Academic Search Complete (Links to an external site.), search for the article "Brevetoxicosis: Red Tides and Marine Mammal Mortalities" by Flewelling et al. If you wanted to explore more of the scholarly conversation by taking advantage of "citation chaining" what links could you click on to help with this task
Answer: The link I would be clicking on with this task is Molecular detection of the brevetoxin-producing dinoflagellate Karenia brevis and closely related species using rRNA-targeted probes and a semiautomated sandwich hybridization assay. Therefore, the task will be accomplished having done this.
WILL GIVE BRAINLIEST AND POINTS!!!!!!! How long can we survive on each planet of the solar system without a spacesuit?
Answer:
about 80 days
Explanation:
the time period of survival is roughly a second, even though the gravity force is equal to that of Earth (the more you know!) Without holding our breaths, or donning any kind of spacesuit, we can survive for about 80 years
A student finds that the mass of 25mL of an unknown liquid is 20.5g. What is the density of this substance?
Answer:
Density, [tex]d=0.82\ g/cm^3[/tex]
Explanation:
It is given that,
Mass of unknown liquid is 20.5 kg
Volume, V = 25 mL
We know that, 1 mL = 1 cm³
25 mL = 25 cm³
The density of the substance is equal to its mass per unit volume. So,
[tex]d=\dfrac{m}{V}\\\\d=\dfrac{20.5\ g}{25\ cm^3}\\\\d=0.82\ g/cm^3[/tex]
So, the density of this substance is [tex]0.82\ g/cm^3[/tex].
Answer:
0.82
Explanation:
just took test
In which form do plants store energy?
starch
glycogen
chitin
cellulose
Answer:
starch
Explanation:
plant store energy in the form of starch and animal store energy in the form of glycogen these starch and glycogen are converted into glucose whenever body needs energy
Answer:
The answer is Starch
Explanation:
Hopefully this helps you
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It is right on Edge2020
At label ________, the cell is not hyperpolarized; however, repolarization is in progress, as the sodium channels are inactivated or becoming inactivated, and many potassium channels have opened.
Answer: C
Explanation:
When a neuron receives a stimulus, the sodium channels present in the membrane are opened, and therefore Na+ enters the cell in favour of the concentration gradient, so that the membrane potential changes to positive by means of ion exchange, producing depolarization. If this depolarization reaches a certain threshold value, an action potential is generated. The next step is the opening of the potassium channels and the inactivation of the sodium channels, so that the repolarization of the membrane takes place. The sodium channels, will return to the closed state in the hyperpolarization to continue in this state during all the rest potential achieving the action potential to return to -70 mV (repolarization).; until the arrival of a new action potential which produces the activation and opening of the sodium channels, repeating the cycle again and generating a new depolarizing action. This process is part of the synaptic transmission.
So, hyperpolarization is any change in the cell's membrane potential, which makes it more polarized. This means, hyperpolarization is an increase in the absolute value of the cell's membrane potential. Thus, changes in membrane voltage where the membrane potential is more distinctly positive or negative are hyperpolarizations.
During the repolarization period after an action potential, the membrane potential is more negative than when the cell is in "rest period". In the picture, this repolarization period is about 1-2 milliseconds. So, repolarization is the time in which the membrane potential is hyperpolarized with respect to the resting potential.
In the attached figure, part C indicates this repolarization period.
about plant kingdom
punnet squares are a useful tool in genetic studies. Which of the following describes the most likely use of this tool?
a. To quantify proportions of offspring with polygenetic traits
b. To determine the genotypic ratios of crosses
c. To determine frequencies of recombination
d. to measure phenotypic variability
Answer:
B
Explanation:
To determine the genotypic ratios of crosses
In brief state what happens when a) dry apricots are left transferred to sugar solution? b) a Red Blood Cell is kept in concentrated saline solution? c) the Plasma-membrane of a cell breaks down? d) rheo leaves are boiled in water first and then a drop of sugar syrup is put on it? e) golgi apparatus is removed from the cell?
Answer:
Explanation:
(a) Dry apricots when placed in pure water swell due to osmosis and when in sugar water, they shrink again.
(b) When a Red Blood Cell is placed in concentrated saline solution exosmosis occurs and the RBCs shrink due to excess loss of water.
(c) Breaking of the plasma membrane leads to the scattering of the ceil organelles as it forms the basic supporting unit of the cell.
(d) When Rheo leaves are boiled in water first and then a drop of sugar syrup is put on it, osmosis does not occurs, due to the death of the cells of the leaf. This shows that selective permeability is property of living plasma membrane.
(e) Golgi complex helps in the package, storage and transfer of proteins synthesized by ribosomes. Thus, when ribosomes are removed the cell will not function properly
Which form of hypoxia reflects poor O2 delivery resulting from too few RBCs or from RBCs that contain abnormal or too little hemoglobin?
a. hypoxemic hypoxia
b. ischemic (stagnant) hypoxia
c. anemic hypoxiad. histotoxic hypoxia
Answer:
c. Anemic hypoxia
Explanation:
Hypoxia is a health condition in which the body or a region of the body is not adequately supply with oxygen at the tissue level. Types of hypoxia include:
Hypoxemic hypoxia is a condition in which their is low level of oxygen in blood in the arteries due to the inability of the lungs to properly oxygenate blood.
Ischemic (stagnant) hypoxia is a type of hypoxia that occurs due to a decrease in blood flow preventing adequate blood supply to tissues.
Anemic hypoxia occurs when the ability of the blood to carry oxyegen is reduced due fewer red blood cells or red blood cells that contain little or abnormal hemoglobin molecules hemoglobin molecules.
Histotoxic hypoxia is hypoxia in which the cells are unable to use oxygen from the bloodstream, even though there is normal delivery of oxygen to such cells and tissues. This is due to the poisoning of the cells or tissues causing a disruption in their respiratory mechanism, for example in Cyanide poisoning.
Therefore, the correct answer is anemic hypoxia.
The diagram shows a straight chain of glucose molecules.
Which carbohydrate is shown above?
O fructose
O sucrose
O galactose
Ostarch
Answer:
Starch
Explanation:
Starch is a polysaccharide composed of many glucose molecules linearly arranged.
---------------------------------------
Fructose, sucrose, galactose, and glucose are carbohydrates. They are organic compounds with H, C, and O. Their functional groups are hydroxyl (-OH) and carbonyl (-C=O).Galactose, fructose, and glucose are isomeric monosaccharides, with the formula C₆H₁₂O₆.
Sucrose is a disaccharide composed of glucose + fructose. The formula is C₁₂H₂₂O₁₁.
Glucose is the most abundant carbohydrate. The main source of glucose is vegetable starch.
The starch molecule is composed of many glucose molecules joined.This is a linear polysaccharide that can acquire a tridimensional helicoidal conformation. Each of the helices turns consists of six glucose molecules. In the interior of the helix, there are only hydrogen atoms. Hydroxyl groups are facing the exterior.
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Which would have a bigger effect on an organism, an error during transcription or a point mutation?
Answer: Point mutation would have a bigger effect on an organism.
Explanation:
