Answer:
Explanation:
Which best describes the pericardium?
structures inside the heart that ensure that blood flows in one direction only
a sac around the heart that allows the heart muscle to receive oxygen
a sac around the heart that protects the heart and chest tissues
structures inside the heart that bring blood to the lungs for oxygenation
Answer:
c
Explanation:
The pericardium is a thin sac that surrounds your heart. It protects and lubricates your heart and keeps it in place within your chest
Pericardium is best described as a sac around the heart that protects the heart and chest tissues.
What is the Heart?This is the central organ of the circulatory system which is involved in pumping blood to other parts of the body.
The pericardium surrounds the heart and helps to protect it from external pressure and other factors.
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how do you find this day?what are the positive things that happened?what are those things that made your irritated or upset?
Answer:
Explanation:
very great at the morning but now i am bored..
no positive things happened till now
the internet is disturbing ang irritating me i can't completing my work.
Describe the control group for an experiment that examines the effect of fire intensity on the biodiversity of tree communities.
Answer:
explanation below
Explanation:
The control group would be the biodiversity of the trees without the fire
The control group in the experiment would center on the biodiversity of the trees without the fire. Ideally, both the control group and the experimental groups are usually identical in every way except that the experimental group would receive the treatment that is believed to have an effect on the biodiversity of trees.
For an experiment seeking to study the effect of fire intensity on the biodiversity of tree communities, the control group will be an experimental unit consisting of a community of biodiversity of trees with no fire or treatment.
In a scientific experiment, they are usually two main groups of experimental units. They are:
The Experimental Group: This group of experimental units receive the treatment. In the case of the experiment cited above, the experimental group would be a community of biodiversity of trees that is set on fire.The Control Group: This experimental units do not receive treatment. They serve as the basis for comparison. In the scenario cited in the question, the control group would be a community of biodiversity of trees without the treatment, which is, no fire on the community.Therefore, for an experiment seeking to study the effect of fire intensity on the biodiversity of tree communities, the control group will be an experimental unit consisting of a community of biodiversity of trees with no fire or treatment.
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Which phrases describe a metamorphic rock
Answer:
formed by a volcano
Explanation:
Rocks are formed on Earth as igneous, sedimentary, or metamorphic rocks. Igneous rocks form when rocks are heated to the melting point which forms magma . Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.
Answer:
formed from a volcano
Explanation:
i took the test got it right, hope this helps! :)
GIVING BRAINLIEST TO FIRST GOOD ANSWER! A LOT OF POINTS PLS ADD EXPLANATION MARINE SCIENCE
A scientist wants to test whether the pH, salinity, or temperature of seawater impacts coral development. He sets up an experiment with three conditions:
Aquarium 1: Normal pH, normal salinity, normal temperature
Aquarium 2: High pH, high salinity, high temperature
Aquarium 3: Low pH, low salinity, low temperature
What factor would improve experimental design the most? (3 points)
Select one:
a. Eliminating Aquarium 1 since it only uses normal conditions
b. Testing one variable at a time and keeping the other two variables constant
c. Using one aquarium and changing the variables from day to day
d. Setting up the variables on a gradient in each aquarium
Answer: The answer is 1
Explanation:
Scientists continually work to better understand human diseases. Knowledge of the human genome enables them to better understand the proteins involved. How does analyzing human genomes help scientists in this endeavor?
a) Chromosomes join together to make proteins.
b) The bases that make up DNA are also present in RNA
c) DNA contains the information used to make proteins.
d) Nucleic acid molecules have shapes similar to those of proteins.
Answer:
I believe the answer is c.
Answer:
The correct answer is c) DNA contains the information used to make proteins.Explanation:
I took the test and made a 100 so you can trust me
Please leave a thanks and rate this answer 5 stars. You don't need an acount to do this!
1. Fill the big bowl with water almost to its rim.
Quick question. What is this? Should I move out???
Answer:
thats a bed bug you're screwed
Which statement is true for all prokaryotic and eukaryotic organisms?
Both types of organisms have DNA contained within a nucleus as genetic material.
Both types of organisms transform energy from sunlight into chemical energy.
Both types of organisms assemble proteins through transcription and translation.
Both types of organisms are made of cells, tissue, and organs that work together.
Answer:
Both types of organisms have DNA contained within a nucleus as genetic material
Answer:
tt
Explanation:
Answer 26-28 please thanks
Answer: 26=3
27=16
28=50
Explanation:
Which section of the article BEST explains how
mole rats developed the strange metabolic
strategy?
A
"Super-Tolerant To Low Oxygen Conditions"
B
"Mice, Naked Mole Rats Differ In Tests"
С
"Blood Fructose Levels Start To Rise"
D
Metabolism Switch Gives Them Boost Of
Energy
Answer:
D
Explanation:
is D because is the only one who talk about more about metabolism. I hope it help you
How does a stem cell become specialized into a heart cell?
Answer:
Explanation:
stem cells are manipulated to specialize into specific types of cells, such as heart muscle cells, blood cells or nerve cells. The specialized cells can then be implanted into a person. For example, if the person has heart disease, the cells could be injected into the heart muscle.
Daughter cells are created when stem cells divide properly in the body or a lab to create more cells. These daughter cells either develop into fresh stem cells or into differentiated cells with a more specific role, such as bone, blood, brain, or heart muscle cells.
How are stem cells differentiated?According to research, cardiomyocytes made from pluripotent stem cells can develop into beating human heart muscle cells that both produce the required signals and restore muscle lost during a heart attack.
Stem cells have the ability to multiply and develop into a variety of relatively mature cells. When inserted into a blastocyst, embryonic stem cells have the ability to develop into any organ in the human body.
Therefore, theoretically, every organ in the body might be replaced using embryonic stem cells.
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Pollen makes a tube to the ovary through the what of a flower
Answer:
After pollen grains land on the stigma, a pollen tube grows from the pollen grain, through the style, and into the ovary. Sperm cells inside the pollen grain travel down the pollen tube and into the ovary which contains the ovules.
Answer:
Explanation:
give the other person brainliest
A rock rolls down a hill. Which form of energy is this an example of?
Chemical
Electrical
Mechanical
Thermal
Answer:mechanical
Explanation:
How is the blackjack seed suited to its method of dispersal?
Answer:
Seeds are widely dispersed through the fruits hook-like bristles that embed themselves in clothing and the fur of mammals and feathers of birds. They are also spread by wind, water and soil.
Explanation:
If your going to a sandy beach on a sunny day, which would feel warmer- the sand or the water?
Answer:
the sand
Explanation:
What is an action of the highlighted muscle?
Answer:
Hi there Braniac! I know your new so let me help you out!
If you would like to ask a question that is not easy to type, simply take a screenshot and press the attach file button! Find your screenshot, then be on your way to better grades and more understanding! Hope this helps!
4. Compare and contrast the rate of sea floor spreading along the Mid-Atlantic Ridge and East
Pacific Rise.
Answer:
The Mid-Atlantic Ridge runs down the center of the Atlantic Ocean. ... The rift valley is 1 to 3 km deep, about the depth and width of the Grand Canyon. In contrast, the East Pacific Rise spreads fast at rates of 6 to 16 cm per year (more than 20 cm per year in the past).
What is the term for "anything that takes up space and has mass"?
A.
Water
B.
Atom
C.
Electron
D.
Matter
Where are the Galápagos Islands located?
Answer:
Pacific Ocean
The Galapagos Islands are located 1000 km off Ecuador's coast in the Pacific Ocean. The Galapagos archipelago consists of 13 major islands, 6 smaller islands and many islets.
Explanation:
Alana summarized what happens when a ball sitting on top of a grassy hill rolls down the hill.
The motionless ball has potential energy. Once the ball starts to roll down the hill, new kinetic energy is made. As the ball rolls across the grass, it slows down. The kinetic energy of the ball is converted to other forms of energy.
Which best describes Alana’s error?
The motionless ball does not have energy because it is still.
Kinetic energy is not made; it is a result of energy transformation.
The ball cannot slow down unless someone touches it.
The energy is not converted; it disappears.
Answer:
It's actually B that guy is wrong on Edge.
Explanation:
Alana's error regarding the energy of the ball is that kinetic energy is not made; it is a result of energy transformation. The second option is true regarding the energy conversion.
What are the various types of energy?The law of conservation of energy says that energy is neither created nor destroyed but only converted from one form to another, such as from the kinetic to the potential and vice versa. Here, the ball is placed at the top, where it has no motion, but the ball has potential energy, and that potential energy gets converted into kinetic energy when the ball starts to roll down the hill. After sometime, the ball spontaneously stopped on the ground, and the kinetic energy was converted into potential energy.
Hence, Alana's error regarding the energy of the ball is that kinetic energy is not made; it is a result of energy transformation. The second option is true regarding the energy conversion.
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Five factors that affect the rate of chemical reactions and describe each
Answer:
Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants
Explanation:
Think and discuss:Suppose you are a farmer trying to grow plants in a greenhouse. Why would it be important to know what the limiting factor is
Answer:
Because limiting factors affect plant growth
Explanation:
A limiting factor is a condition that limits the population's growth in an ecosystem by slowing or stopping its growth. These factors are generated by the lack or excess of a particular resource. In plants, limiting factors include, among others, light, water, temperature, oxygen, food, (i.e., nutrients and minerals), space, etc. In this case, the farmer must know which greenhouse conditions are limiting factors in order to ensure the survival and optimal development of the plant population.
Once the DNA strand unwinds and is modified; it sent through the
nucleus for translation. What stage of translation would most likely
occur at letter A?
A) initiation
B) elongation
C) termination
D) RNA processing
Answer:
I think it is A.
Explanation:
Which is not a function of the respiratory system? *
It warms air entering the body.
O It exchanges oxygen and carbon dioxide.
O It pumps blood to the organs.
O It creates sound through the voice box.
Answer:
it exchanges oxygen and carbon dioxide
Explanation:
You inhale oxygen and exhale carbon dioxide
Out of the given options 3 that is "it pumps blood to the organs" is not a function of the respiratory systems.
The respiratory system is a network of organs and tissues that assist you in breathing. This system assists your body in absorbing oxygen from the air so that your organs can function.
It also removes waste gases from your blood, such as carbon dioxide. Allergies, illnesses, and infections are common difficulties.
The respiratory system contributes to the warming and humidification of the air we breathe. The air is warmed as it goes through the nasal passages and pharynx, which helps to protect the lungs' sensitive tissues.
The respiratory system contributes to the production of sound. When air flows through the larynx (voice box), the vocal cords vibrate, producing sound.
Thus, the option 3 is not the function of the respiratory system.
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what type of igneous rocks are the Hawaiian islands
The Hawaiian Islands are nearly entirely made of basalt lava, the most abundant type of rock on the planet.
What is igneous rock and its type ?Hot, molten rock crystallizes and hardens to produce igneous rocks, which are named after the Latin word for fire. The melt begins deep inside the Earth around hot regions or active plate borders, then it rises toward the surface. Depending on where the molten rock hardens, igneous rocks are classified as either intrusive or extrusive.
Intrusive Igneous Rocks: When magma is imprisoned in the Earth's interior, intrusive, or plutonic, igneous rocks are created. The individual mineral grains have a very long time to develop because of the slow cooling, and as a result, they reach a comparatively enormous size. Rocks that are intrusive have a coarse-grained texture.
Thus, Hawaiian islands are made up of basalt ; the most common rock on the earth.
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W Within a forest ecosystem, there is a large amount of diversity among members of a warbler species. Of the following stages of meiosis illustrated for a typical cell, which contributes most to diversity among the warblers? Pay special attention to the chromatids.
Answer:
Explanation:
How a Forest Ecosystem Matures . Forest ecosystems tend to always be moving toward maturity or into what foresters call a climax forest. This maturing, also called forest succession, of the ecosystem increases diversity up to the point of old age where the system slowly collapses. One forestry example of this is the growth of trees and the entire system moving toward an old growth forest.
A Large amount of warbler species, crossing over between homologous chromosomes, is closely involved in genetic variation. The stage that most contributes to diversity is stage C, where you can see chromosomes after crossing-over.
There are different mechanisms involved in producing genetic variation among descendants, are-
Crossing-over between homologous chromosomes (prophase 1), The Random lining of homologous chromosomes (metaphase 1), Random fertilization
The Crossing-over events occur between two homologous chromosomes within the equatorial plane and make the daughter cells genetically different from the first one.
The Chiasma is the position where two homologous chromatids interchange genetic information, giving an area for brand spanking new genetic material or information to be provided to descendants.
After crossover, homologous chromosomes get separated again. In the attached image there are four different stages of meiosis.
Stage C is the one that contributes foremost to diversity. We can see that crossover has already occurred between homologous chromosomes and that they have already interchanged segments.
In the image, you will see the difference between chromosomes that have gone through the crossing over mechanism, and chromosomes that have not. The difference in color represents segments interchange and variation.
Therefore, that answer shows the contribution to diversity among the warblers.
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if one species in a community dies out or moves, the community will
Answer:
The community will slowly decline, or be just fine, or be better off.
Explanation:
Wolves being killed in Yellowstone showed that Yellowstone suffered, because there was nothing to kill the elk, so their population exploded and they ate everything.
If certain rats were gone in certain areas, then the community/environment would be fine, because rats eat birds and other small animals (they eat too many of them).
And if stray cats were gone then certain forests would be better off and see an increase in birds population, stray cats eat birds.
Describe the electron transport chain including its reactants and products
Answer:
The electron transport chain is a series of electron transporters embedded in the inner mitochondrial membrane that shuttles electrons from NADH and FADH2 to molecular oxygen. In the process, protons are pumped from the mitochondrial matrix to the intermembrane space, and oxygen is reduced to form water.
Explanation:
The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis.8
Which equation describes what happens in photosynthesis?
Answer:
Photosynthesis is a chemical reaction that takes place inside a plant, producing food for the plant to survive.
Carbon dioxide, water and light are all needed for photosynthesis to take place.
Photosynthesis happens in the leaves of a plant.
Explanation: