Yes. Absolutely. Without heart, no one can live. It helps in pumping of oxygen rich blood to all body cells and tissues. It also helps in transportation of various materials like potassium, sodium, calcium etc. in our body. The main function is that it helps in excretion of wastes.
Since blood is liquid and heart pumps it, the waste materials like CO2, gets diffused and becomes impure blood. Then it is taken to lungs for purification and again reused.
So, heart actually helps us indirectly in many ways.
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What is the meaning of a null hypothesis being rejected?
Answer:
If there is less than a 5% chance of a result as extreme as the sample result if the null hypothesis were true, then the null hypothesis is rejected. When this happens, the result is said to be statistically significant .
There are a dozen eggs in a carton. Twelve people each take a single egg, but there
is one egg left in the carton. How?
Lateral thinking: There are a dozen eggs in a carton. Twelve people each take a single egg, but there is one egg left in the carton. This is only possible if the last person to take the egg, took it along with the carton, leaving the egg in the carton only.
What is lateral thinking?Lateral thinking is that approach of solving problems which is creative and involves out - of - box ideas. The solution might not have anything to do with logical reasoning. The solution might differ for different people i.e., there can be more than one solution.
For example, in this question, when twelve people took twelve eggs, one each, from the carton, there is no mathematical or logical solution to how one egg is left in the carton. But we can reach for a lateral approach that the last person took the carton along with the egg, keeping the egg inside the carton.
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why are Polar bears are much larger than American black bears
The figure shown is a rectangular prism. Which edges are parallel to BD? Select each correct answer.
py
yh
bm
ah
mk
In the rectangular prism, the parallel lines to BD are PY, MK and AH. So the correct options are A, D and E.
What is a rectangular prism?
A rectangular prism is a geometrical figure. It is basically a polyhedron and has two congruent and parallel bases. It is also known as a cuboid.
A rectangular prism is made of six faces and each of the faces has twelve edges. It is called a prism because it has cross-sections along the length.
A rectangular prism is a three-dimensional figure with six faces. All the faces of the prism are rectangular in shape. Hence, there are three pairs of identical faces here. A rectangular prism is also called a cuboid due to its shape.
The rectangular prism has 6 faces, 12 edges and 8 vertices.
The top portion and the base portion of the rectangular prism are always a rectangle. It has three dimensions like a cuboid. These are length, width and height. The opposite faces of the prism are always congruent.
Therefore, the parallel lines to BD are PY, MK and AH. So the correct options are A, D and E.
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How does earthquake bring about change in the topography of the earth
Answer:
Earthquake cause a massive impact like cracking the grounds and creating a big change in the map and the world
how do you think different intelligences might affect how people learn best
Answer:
The multiple intelligence theory can draw students back into learning. Using the different intelligences to teach a concept allows each of your diverse learners a chance to succeed at learning. Teaching to a student's strength helps increase learning success.The theory of multiple intelligences confirms these empirical experiences and can provide educators with a framework and tools that will allow them to better meet the needs of the different types of learners present in every classroom.
Explanation:
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4. Ciertos individuos en su escuela son líderes. ¿Qué hace que la gente siga a los demás? Una encuesta realizada indicó que
el rasgo que más valoraban los estudiantes en un amigo era la honestidad. ¿Por qué cree que esto es cierto?
Answer:
Mucha gente sigue a los demas porque piensan que lo que muchos siguen la mas alta alta probalidad tiene de estar correctos y tambien creen que ellos son bien popular.
Explanation:
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Answer:
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If we pick a plant and an animal cell, which one of them would lose its shape
Answer:
the animal cell would lose its shape as the plant cell has a cell wall which gives shape and protection.
by the animal cell don't have a cell wall.
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Explanation:
what is reproduction and explain the types of reproduction in plants?
Answer:
The production of new individuals from their parents is known as reproduction.
The types of reproduction in plants are:-
asexual : There are several methods of asexual reproduction such as fragmentation, budding, spore formation and vegetative propagation.
Sexual: Sexual reproduction involves the fusion of male and female gametes.
Have a nice day!![tex] \huge \boxed{\mathfrak{Answer} \downarrow}[/tex]
Reproduction is the process of producing new offsprings by 2 or 1 matured parents.There are 2 types of reproduction in plants => sexual & asexual reproduction.Sexual reproduction takes place when 2 parent plants form offsprings. Like for example, rose & jasmine.Asexual reproduction takes place when only 1 parent plant alone gives birth to new offsprings. It takes place in hydra.What can the similarity between our mtDNA (and the mutations in it) tell us
4. Do you think 20 ml of soda has a greater mass than 20 ml of water? Design an experiment to test this. Explain how you will
determine which one (soda or water) has the most mass.
Yes, in my opinion 20 ml of soda has a greater mass than 20 ml of water due to higher weight of soda particles as compared to water.
It is because solid substance is more denser than liquid. In 20 ml of soda, there are solid particles in it which make it heavier and denser than liquid water. In order to design this, we have to take two solutions, one having soda whereas the other has water in liquid form with equal concentrations. Then we have o find the density of both solution, that solution which has more density is considered as heavier than other solution. The density of soda is 2.54 g/cm³ whereas the density of water is 1 g/cm³ so it is clear that soda is denser than water.
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Explain the mechanism of water movement from the roots up the tree to the leaves
1-Water is passively transported into the roots and then into the xylem. 2-The forces of cohesion and adhesion cause the water molecules to form a column in the xylem. 3- Water moves from the xylem into the mesophyll cells, evaporates from their surfaces and leaves the plant by diffusion through the stomata.
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what is smallpox disease?
Answer:
According to the internet:
"An eradicated virus that used to be contagious, disfiguring, and often deadly."
explain how fixation happens
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Explanation:
if iodine is added to a solution and it turns blue-black that means carbohydrate is present
Which phrase best describes Earth's biodiversity?
a. greater in consistently warm areas
b. greater toward Earth's poles
c. greater according to energy needs
d. greater where temperatures are most variable
Answer:
A) greater in consistently warm areas
Explanation:
This best describes Earth's biodiversity because it is not greater toward Earth's poles, according to energy needs, or where temperatures are most variable. Consistently warm areas are where Earth's biodiversity tends to be greater.
A central idea of biology, protein synthesis, occurs in what order?
Questions
1. What are the levels of organization?
2. What is the relationship between a cell, tissue, organ, organ system and organism?
3. Why don't levels of organization apply to unicellular organisms?
4. How would organelles fit into the levels of organization?
5. Draw a diagram that would help you visualize the relationship between the five
levels of organization.
Answer:
cell
tissue
organ
system
human organism
Explanation:
unicellular organisms only have one cell since two or more cells form a tissue their level of organization is restricted to cell
cell
two or more cells form a tissue
two or more tissue forms an organ
two or more organs form a system which must work in coordination for efficiency
two or more systems make up a human organism
describe what may happen to viruses that leave infected white blood cells
Answer:
White blood cells are an important part of the immune system. HIV infects and destroys certain white blood cells called CD4+ cells. If too many CD4+ cells are destroyed, the body can no longer defend itself against infection. The last stage of HIV infection is AIDS (acquired immunodeficiency syndrome).
A) Group 2 elements have two valence electrons. Which kind of bond will they most likely form, and why? (1 point)
A covalent bond is likely because they want to share those two valence electrons in order to become stable.
An ionic bond is likely because they will want to give away two valence electrons in order to become stable.
A metallic bond is likely because they are metals and can bond with other metals.
An ionic bond is likely because they are metals and will want to bond with nonmetals
Answer:
B. An ionic bond is likely because they will want to give away two valence electrons in order to become stable.
Explanation:
Answer:
An ionic bond is likely because they will want to give away two valence electrons in order to become stable.
Explanation:
Which of the following is NOT a response that the body would have to a stimuli?
A. physical response
B. chemical response
C. creating a feeling
D. evolving the body
Answer:
Explanation:D
The CNS, which is made up of the brain and spinal column, coordinates how the body reacts to stimuli.Motor neurones are used by the CNS to communicate with an effector.A hormone or a muscle in the body that causes a response is known as an effector.
How does your body respond to stimuli?
The creating feeling is not involve stimuli .Anything that makes you react, like the smell of food making your mouth moisten, is a stimulus.Body movements such as muscle contractions, gland secretions, or brain operations are responses. The stimulus is a change in the environment, and the response is how the organism responds to it.In single-celled organisms, the reaction is a result of a cell characteristic...An organism's senses, which are delicate components of his body, respond to stimuli. The sensory input from the outside world consists of touch, pain, vision, smell, taste, sound, and balance (equilibrium).External changes trigger the activation of these sensory impulses.Touch and pain: The stimulus that can have a significant impact on the body is pain.The definition of a response is a response to an activity.The way a person responds to an ink stain on a card is an illustration of response.An answer to a question is what is meant by a response.What follows a question in a question-and-answer session is an illustration of a response. Animals react to a stimuli in order to maintain their current circumstances.Examples of this include leaving a place that is too chilly and moving somewhere warmer.if hungry, moving in the direction of food. The body's automatic responses to a stimulus are known as physiological responses.The natural and instinctual physiological reactions we encounter every day are familiar to most of us, but we frequently ignore them. The various tastes of the various foods you eat are an example of chemical stimulation.When chemical messengers (hormones) interact with cells, biological stimuli are observed. To preserve homeostasis, your body also needs to keep secure and defend itself.In order to preserve homeostasis, the body reacts to stimuli.The body quickly resumes its normal state as a result of these intricate responses.We would get frequent fevers and other illnesses if they didn't.To learn more about stimuli refer
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How would you change the flowing water model to make it more like actual geologic process on Earth?
Answer:
Options include building dams to trap water from rivers, pumping water from the ground, and dredging for new sources of water. Each of these activities can change the timing and amount of freshwater that enters our estuaries, and natural drought cycles only make their effects worse
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What are two ways you can set up an experiment to measure the rate of photosynthesis?
Answer:
Measuring photosynthesis via the uptake of carbon dioxide. ...
Measuring photosynthesis via the production of oxygen. ...
Measuring photosynthesis via the production of carbohydrates. ...
Measuring photosynthesis via the increase in dry mass. ...
Investigating the light-dependent reaction in photosynthesis.
2. A nucleus contains tiny rod-shaped
boll bodies. What are they called?
Which would be considered a reliable source?(1 point)
an opinion column in your favorite magazine
an article from a scientific journal
a blog written by an anonymous author
a biology textbook from 1920
When looking for updated and reliable information, you always need to point to scientific journals, magazines, encyclopedias, or textbooks recently printed or published. In the exposed example, the most reliable source is an article from a scientific journal.
----------------------------------------
When looking for updated and reliable information, you need to be careful with the source, authors, and publishment dates.
In general, scientific journals, magazines, encyclopedias, or textbooks are sources of reliable information. The material exposed on these sources has been previously checked and evaluated by a group of people trained and capable to do so. If your favorite magazine is not a scientific one, you should look for another source.
You also want to consider the authors. Some researchers are very well known, and their publications probably reflect years of investigation. By looking for these authors´ publications you will ensure a good source. You should use a blog written by a well-known author, but not a blog that is written by an anonymous one.
You also need to consider that your source should be recently printed or published. Science is very dynamic and continuously changes. Discoveries always replace old information. So when looking for a reliable source, you need to look for recent publications. A biology textbook from 1990, although it is a reliable source, it probably has old information.
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Can someone help me with question 8 and 9
Answer:
8. A
Explanation:
they are moved by strong, steady winds called unidirectional winds, which move from the south west to the north east
Explanation:
8. The same direction as the wind blows
9.Their source was glacial deposits
Which of the following is the
function of the nuclear envelope?
A. It contains genetic information.
B. It is the control center of the cell.
C. It allows material in and out of the nucleus.
D. It keeps the organelles from colliding.
Answer:
A. it contains genetic information.
Answer:
A.
Because the nuclear envelope consists of two membranes, an inner and an outer nuclear membrane. Together, these membranes serve to separate the cell's genetic material from the rest of the cell
why Should A Potometer be Allowed to stand before starting the Experiment
It is crucial to avoid air bubbles in the assembled potometer. The plant stem must be cut underwater to prevent airlocks forming in the xylem. All fittings must be tight so that the only way the apparatus can lose water is by the plant transpiring.
What is potmeter?An instrument used for measuring rate of Transpiration occurring from lower surface of leaf.
Thus, All fittings must be tight so that the only way the apparatus can lose water is by the plant transpiring.
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How do the daughter cells created from Mitosis compare to each other?
A. One has the original set of DNA, the other has 2 sets of DNA.
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B. Both daughter cells receive a duplicate set of DNA.
C. Both daughter cells receive an identical set of DNA from the parent cell.
D. Each daughter cell receives half of the parent cell's DNA.
Answer:
C. Both daughter cells receive an identical set of DNA from the parent cell
Explanation: