Answer:
Right Atrium
Explanation:
Chordae tendinae are located in the ventricles of the heart. Their function is to prevent the valves between the ventricles and atria from opening the wrong way. Damage to them would cause the valve flaps to open during ventricular systole, sending blood back into the atria.
. circle the letter of each sentence that is true about the light-dependent
reactions. correct the false statements.
a. they convert adp into atp.
b. they produce oxygen gas.
c. they convert oxygen into carbon dioxide.
d. they convert nadp+ into nadph.
e. photosynthesis begins when pigments in photosystem i absorb light
Light-dependent reactions are the electron flow along the electron transporter chain. The final products are NADPH and ATP production and Oxygene release.
What are the light dependent reactions?
Light-independent reactions occur in the thylakoyd membrane where pigments are placed. They involve light absorption and the electron flow from water to NADPH.
During light-dependent reactions, oxygen is released, while ATP and NADPH are produced. Both of them are used during light-independent reactions.
Energy is released as electrons move through the chain. This energy pumps H+ into the thylakoid compartment, and then they power the formation of ATP as they flow back out.
Steps,
1. Luminous energy is trapped by chlorophyll in Photosystem II.
2. When the pigment molecules absorb light, electrons provided by water molecules get in a higher energy level.
3. The excited electrons go through the electron transport chain from Photosystem II to a less energetic level in photosystem I.
4. When the excited electrons leave photosystem II, they are replaced by new electrons extracted from the water molecules.
5. Luminous energy absorbed move the electrons from the photosystem I to another electron acceptor, from where they get transported again and used to produce NADPH molecules.
6. When electrons leave Photosystem I, they are replaced by new electrons coming from photosystem II.
7. When the water molecule breaks down, hydrogen ions remain in the thylakoid lumen, from where they are pumped to the stroma by the ATP synthase.
8. The released energy is used to produce ATP molecules.
9. Hydrogen ions go back from the stroma to the thylakoid compartment.
a. they convert adp into atp ⇒ true, using energy from H+ pump.
b. they produce oxygen gas ⇒ true, they release oxygen when water molecule breacks
c. they convert oxygen into carbon dioxide ⇒ false, CO₂ is not involved in light-dependent reactions.
d. they convert nadp+ into nadph ⇒ true, they reduce NADP+ into NADPH using H+
e. photosynthesis begins when pigments in photosystem i absorb light ⇒ false, photosynthesis begins when pigments in photosystem II absorb light.
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Which of the following requires the least amount of energy to produce?
Question 15 options:
vegetables
chickens
canned soda
cattle
Answer:
An astronaut who weighed 150 pounds on Earth found that his weight on Jupiter was 400 pounds. He captured an alien that weighed 120 pounds on Jupiter. What is the alien's weight on Earth?
Explanation:
a.
45 pounds
c.
500 pounds
b.
30 pounds
d.
320 pounds
which statement is not true about the ring of fire
While walking to the kitchen in the middle of the night, jamal tripped over an object that he could not see in the dark. which part of the cns sent a signal to help prevent jamal from falling? cerebrum hippocampus cerebellum brain stem
The part of the cns sent a signal to help prevent Jamal's fall was the cerebellum
How does the cerebellum act in balance?Balance and posture are the responsibility of the cerebellum, which coordinates body movements, uniting and articulating muscle movements so that they keep the body balanced and maintain its posture.
With this information, we can conclude that the part of the cns sent a signal to help prevent Jamal's fall was the cerebellum
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Answer:
i just took the test it is cerebellum also known as answer c
Explanation:
briefly discuss five economic importance of microorganisms
Answer:
Bacteria are economically important as these microorganisms are used by humans for many purposes. The beneficial uses of bacteria include the production of traditional foods such as fudge, yogurt, cheese, and vinegar. Microbes are also important in agriculture for compost and fertilizer production.
Answer:
The human body has 10 microorganisms for every human cell, and these microbes contribute to digestion, produce vitamin K, promote the development of the immune system, and detoxify harmful chemicals. They are also important in agriculture for compost and fertilizer production.
Explanation:
What are the 5 elements of digestion
The five elements of digestion are:-
1. Ingestion:- Taking food into the mouth.
2. Digestion:- Breaking down of food so it can be absorbed into the small intestine.
3. Absorption:- Food passes into blood system from small intestine.
4. Assimilation:- The way in which the body uses food.
Getting rid.
5. Getting rid of undigested and unabsorbed food.
What is digestion?
Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma.
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6th grade student measured his heart rate at 94 beats per minute every minute every morning at the same time for two
Weeks. In his report he claimed he proved that 6th grader's hearts beat 94 times per minute. What is wrong with his
Report?
A. Human hearts do not beat that rapidly.
B He should have taken his heart rate many times over two weeks.
C. 6th graders hearts do not beat that slowly.
D.The student's sample size is too small to prove his claim.
Answer:
its A
Explanation:
Its impossible for a human to have a heart beat of 94 each minute
The statement that represents a wrong concept in his report is as follows:
Human hearts do not beat that rapidly.Thus, the correct option for this question is A.
What is Heart rate?Heart rate may be defined as a mechanism that significantly involves the number of times the heart beats within a certain time period generally in a minute. In a more simple sense, it may be characterized as the number of contractions of the heart per minute.
According to the context of this question, the normal rate of humans usually ranges from 60 to 100 beats per minute. But being a student of 6th standard, it is too higher because it is ranging from 60 to 80 per minute for that group of children specifically with respect to the capability of their cardiovascular stength.
Therefore, the correct option for this question is A.
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Describe the effects of malnutrition on humans.
Answer:
Malnutrition can result in unplanned weight loss, a low body mass index (BMI) and vitamin and mineral deficiencies. This can leave you feeling tired, weak and affect your ability to recover from an illness. In the UK, evidence suggests that: 29% of people admitted to hospital are malnourished.
i also added my school notes :)
hope this helps :3
Answer:
Malnutrition can result in unplanned weight loss, a low body mass
Explanation:
no need
>:))ficiencies. This can leave you feeling tired, weak and affect your ability to recover from an illness. In the UK, evidence suggests that: 29% of people admitted to hospital are malnourished.
What is biodiversity?
a college for studying biology
all different types of organisms
all different types of sciences
a language used by biologists
Answer:
2.all different types of organisms
Answer:
B
Explanation:
If the process involved in cellular transport are not functioning properly, how is cellular homeostasis affected? In general terms, if the cell of an entire organ are not carrying out cellular transport properly, what is the result?
Answer:
Cell membranes enable organisms to maintain homeostasis by regulating the materials that may enter or leave a cell. Some materials easily cross the cell membrane without the input of energy; other materials require energy input in order to cross through the cell membrane.
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Where do sperm go after leaving the epididymis?
OA. Ejaculatory duct
OB. Seminiferous tubules
C. Vas deferens
OD. Urethra
c is the right answer
Explanation:
hope it will helpful for you.
On leaving the epididymis, the sperm is expelled into the vas deference, thus the correct option is option C.
Where is the sperm stored?The sperm are stored in the epididymis. Upon ejaculation, the sperm leaves the epididymis and migrates to the vas deferens.
The vas deferens create a protective fluid that protects the sperm while it's out from the urethra. If sperm does make it into the vagina, there’s a chance that it will fertilize the female egg.
Epididymis is a long tube that functions to transport sperm from the testis to the vas deference. While traveling through the different parts of the epididymis the sperm gets mature and acquires the ability to swim. So epididymis plays an important role in the maturation and transport of sperm.
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How will building a road through the rainforest affect the plants and animals
Answer:
it will kill paints remove animal homes take more area that was for animals so they will fight over territory even more
Hope This Helped
4. Name the dark, linear, thread-like structures that you can see in some of the onion root tip cells. What Biomolecule of heredity do they contain
In which environment will decomposition occur the fastest?
A. The Arctic Ocean
B. Antarctica
C. The Sahara desert
D. The Amazon Rainforest
Decomposition will occur the fastest in Amazon rainforest.
What is decomposition?Decomposition is the process of breakdown of dead organic matter with the help of microorganisms like bacteria and fungi.Decomposition is necessary for the recycling of elements back into the ecosystem.The organisms resulting in decomposition are termed as decomposers. These require appropriate environmental conditions for decomposing.At low temperature such as in Antarctica, decomposers are less active thus reducing the rate of decomposition.Decomposers cannot survive in little or no water conditions such as in the Sahara desert. Decomposition increases with the increase in water availability.Decomposers also require oxygen to survive which is not available in deeper parts of the Arctic ocean. Therefore decomposition does not occur in low oxygen environment.With optimum water, temperature and oxygen available, rate of decomposition is also high in the Amazon rainforests.Learn more about decomposition here:
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PLEASE HELP ME THIS IS DUE AT 12 AND I HAVE 15 MINUTES LEFT.
Answer:
Columbia Space Shuttle
Cassini
Hubble Telescope
Valentina Tereshkova
John Glen
Yuri Gagarin
Explanation:
For men, the period of physical and psychological change in the reproductive system is referred to as.
3. Cells divide, differentiate, or die. What is differentiation?
Answer:
Differentiation is when cells stop dividing to develop specialized structures such as a neuron developing an axon.
Explanation:
Its basically when cells stop dividing to specialize in structure and function.
List the cups in order of the most hatched eggs to the least
Acid rain is liquid deposition that occurs when sulfuric and nitric acids get dissolved in rainwater and reach the ground affecting the whole ecosystem.
What is acid rain?
Acid rain refers to the liquid deposition of water drops charged with dissolved pollutive acids, like sulfuric and nitric acids.
Liquid deposition can be caused by rains (acid rain), snow, dew, or fog. During this event pollutive acids are dissolved in atmospheric water drops and are driven to the ground.
Usually, rainwater pH is about 5.6.
However, with high concentrations of acids in the environment, rainwater pH decreases.
When the the rain gets to the ground, they produce a series of chemical changes that alter the natural pH of the soil and water and have a consequent effect on ecosystems.
Day 1
Cup pH
F 8
E 7
D 6
C 5
B 4
A 3
Day 2
Cup pH
D 6
E 7
F 8
C 5
B 4
A 3
Day 3
Cup pH
E 7
D 6
F 8
C 5
B 4
A 3
Day 4
Cup pH
E 7
D 6
F 8
C 5
B 4
A 3
According to this data, we can assume that eggs need a neutral to basic pH to hatch. Acid media notoriously affects egg hatching.
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exchange of useful chemicals between organisms and their abiotic environment is an example of what
The exchange of useful chemicals between organisms and their abiotic environment is an example of matter cycling.
What is the matter cycling?Matter cycling refers to the cyclic movement of matter between biotic factors and abiotic factors.
This process (matter cycling) is fundamental for the survival of organisms and health of an ecosystem.
In conclusion, the exchange of useful chemicals between organisms and their abiotic environment is an example of matter cycling.
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Mountain ranges form along ___ plate boundaries via orogenic processes.
Rift valleys formed through the stretching of divergent plates occurs through a/an ___ process.
The formation of mountain ranges occurs as a result of ___.
Scientists observe an extremely long ___ area in a continental plate during an orogenic process.
___ processes cause vertical plate motion along tectonic plates.
1. Mountain ranges form along convergent plate boundaries via orogenic processes.
What is tectonic plates?The formation of mountains is caused by tectonic plates. A mountain is formed when two tectonic plates move towards each other and collide, resulting in altitudes that can take years to reach but that eventually create massive mountains through what are known as convergent plate borders.
2. Rift valleys formed through the stretching of divergent plates occurs through a divergent boundary process.
When tectonic plates separate, they can leave low ground areas like the Rift Valley, which are produced by diverging continental plate borders. They can be found on the surface of the Earth or at the bottom of the ocean, and they are formed by the expansion of the seabed.
3. The formation of mountain ranges occurs as a result of orogeny.
This process occurs when one continental plate dips and the other rises, allowing mountain ranges to form. Orogeny is the name given to this process.
4. Scientists observe an extremely long deformation area in a continental plate during an orogenic process..
Scientists use tectonic plate simulations to study this deformation in order to better predict natural disasters such as earthquakes.
5. Epeirogenic process causes vertical plate motion along tectonic plates.
The vertical movement of a continent that generates soft arcs or rises parts uniformly is known as epeirogeny.
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Respiration return to the atmosphere oxygen carbon dioxide nitrogen
Answer:
cellular respiration
Explanation:
During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide. Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration.
Organisms that have catalase
what are you looking for in your observations when you are looking for evidence of a reaction?
does the plant tissue that was tested contain catalase?
does the animal tissue that was tested contain catalase?
Higher vascular plants contain catalase to metabolize Hydrogen peroxide (H2O2) in mitochondria and chloroplasts.
What is catalase?Catalase is a key enzyme used by organisms to metabolize Hydrogen peroxide (H2O2), which is a reactive substance.
The animal tissues also contain catalase which they use to generate H2O and thus remove toxic H2O2.
In conclusion, higher vascular plants contain catalase to metabolize Hydrogen peroxide (H2O2) in mitochondria and chloroplasts
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How does excess calcium from dissolved bones affect kidney function?
group of answer choices
excess calcium travels around the bloodstream until it reaches the kidneys, where it accumulates and causes kidney failure.
excess calcium travels around the bloodstream until it reaches the kidneys, where it is dissolved and increases kidney function.
excess calcium travels around the bloodstream until it reaches the kidneys, where it is dissolved and narrows kidney blood vessels.
excess calcium travels around the bloodstream until it reaches the kidneys, where it accumulates and can form kidney stones.
Answer:
The last choice
Explanation:
Hypercalcemia is a condition in which the calcium level in your blood is above normal. Too much calcium in your blood can weaken your bones, create kidney stones, and interfere with how your heart and brain work.
How does the sea ice in 2019 compare to the sea ice in 2012 during April?
The amount of sea ice in 2019 is considerably less than it was in 2012
The amount of sea ice in 2019 is considerably more than it was in 2012
The amount of sea ice in 2012 and 2019 were very similar
The total amount of sea ice showed a decline
The total amount of sea ice showed a decline from 2012 to 2019. The correct option would be D.
Graphical illustrationLooking at the graph, from February to June 2012, there is a decline in the amount of sea ice.
A similar decline in the amount of sea ice can be observed in the year 2019.
However, the sea ice levels for the various months in 2012 remain generally above the sea ice levels in the various months in 2019.
Thus, overall, one can say there is a general decline in the ice level from 2012 to 2019.
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how can natural selection help explain how a population becomes extinct?
Answer/Explanation:
Natural selection is the process in which populations of organisms adapt and change due to their environment. Natural selection can cause a population to go extinct because if the organisms are not suited for their environment, they will eventually die off.
Let's take Charles Darwin's finches on the Galapagos Islands for example. These finches have an incredible diversity in their beak size, shape, etc. This is because the finches need to adapt to their environment in order to survive. During his studies, Darwin noticed a drought was happening on the islands. The finches with the larger-than-average beaks started to die off because the only food available was tiny seeds that only small beaks were able to get. Because of this, the population of the finches changed throughout generations to have smaller beaks, so they wouldn't starve. This is a prime example of natural selection because the finches with the small beaks survived while the finches with the larger beaks did not.
In conclusion, natural selection can help explain how a population becomes extinct because if a population is not suited for their environment they will not survive.
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The images show two different types of Galapagos tortoises that scientists believe descended from the same species. The first type (left) are found on islands that have high vegetation and few grasses. The second type (right) are found on an island that has large amounts of grasses and low-lying shrubs. What explains the type of turtle found on the islands with high vegetation?
A.
The environment triggered a gene mutation in neck length in order to help the turtle survive.
B.
Mutations are random, so it is by chance that turtles with longer necks live on these islands.
C.
Turtles with genes for long necks had a better chance of surviving to reach reproductive age.
D.
Turtles with short necks completely lacked adaptations for finding food, so they died off.
Turtles with genes for long necks had a better chance of surviving to reach reproductive age due to ability to reach the food source.
What type of turtle survive on the Island?Turtles with genes for long necks had a better chance of surviving to reach reproductive age because the long neck enables the turtles to reach the food source that is present on a certain height. So they are able to survive and complete its life cycle.
So we can conclude that option C is the right answer.
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"The images show two different types of Galapagos tortoises that scientists believe descended from the same species." the type of turtle found on the islands with high vegetation. Turtles with genes for long necks had a better chance of surviving to reach reproductive age. Option C. This is further explained below.
What is the Galapagos tortoise?Generally, the Galapagos tortoise is simply defined as the Galápagos gigantic tortoise, belongs to the genus Chelonoidis and is the largest species of tortoise.
In conclusion, a turtle species typical to islands with dense flora. Those turtles that had the genes for a longer neck were more likely to live to reproduce.
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The adaptive (specific) defense system: Group of answer choices issues an attack specific to particular foreign substances includes the skin and mucous membranes provides mechanical barriers to the body is the body's first line of defense against invading pathogens is an innate defense
The adaptive (specific) defense system: issues an attack specific to particular foreign substances. hence, option A is correct.
What is the adaptive immune system's primary function?Adaptive immune responses are designed to eliminate invading infections and any harmful chemicals they create. Because these responses are harmful, they must only be elicited in response to molecules that are foreign to the host, not the host's own molecules.
Antibodies and lymphocytes make up the adaptive defense, which is also known as the humoral and cell-mediated responses. The term 'adaptive' alludes to the distinction between self and non-self, as well as the tailoring of a response to a specific foreign invader.
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Bones grow from their ends, where the cartilage is located
T.True F.False
Bones grow from their ends, where the cartilage is located is a true statement.
What is a Cartilage?
These are tissues which are soft and non vascular and ensure low friction environment for bones.
Bones grow from their ends, where the cartilage is located at the epiphyseal plate which is a thin plate of hyaline cartilage between the diaphysis and epiphysis.
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Select the correct answer. alternators are installed on automobiles to power things like the lights and the radio. which kind of device is an alternator? a. generator b. motor c. battery d. wind turbine e. electric fan
The kind of device in which an alternator can be categorized is a generator of electric energy.
What is an alternator?An alternator is a tool/device in a car that converts mechanical energy into electrical energy.
The electrical energy generated by using an alternator is alternate electrical energy.
In conclusion, the kind of device in which an alternator can be categorized is a generator of electric energy.
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Answer: Generator
Explanation:
How many moles of hydrogen gas what contains 2.4 x 1024 hydrogen atoms