7. A certain atom has an atomic number of four. How many protons does it have?
4
8
2
0
Answer:
4
Explanation:
An atom with atomic number of 4 will have a proton number of 4.
Atomic number is the number of protons in an atom. Therefore, when given the atomic number, it shows the number of protons in the atom.
The number of protons is the number of positively charged particles in the nucleus of an atom. The atomic number is used to arrange elements in their right position on the periodic table.How does a rock change into a metamorphic rock?
A. evaporation
B. cementation and compaction
C. heat and pressure
D. cooling of magma
Answer: C
Explanation:
Any rock (igneous, sedimentary, or metamorphic) can become a metamorphic rock. If rocks are buried deep in the Earth at high temperatures and pressures, they form new minerals and textures all without melting. If melting occurs, magma is formed, starting the rock cycle all over again.
Answer:
C
Explanation: The heat and pressure changes the rock into a different type of rock such as igneaous, metamorphic, and sedimentary.
In a water compound, what kind of charge does oxygen have?
Answer:
Positive
Explanation:
Describe three examples of how metrology can improve the safety of automobiles
Answer: They can stop letting smoke come out from the back. Limit Their Driving. Throw away all the old used cars.
Explanation:
If an organism is composed of only one cell, it ____. Fill in the blank.
A: Performs all the functions
B: Is specialized
C: Does not have any function
D: It cannot survive on its own.
Answer:
A.
Explanation:
After photosynthesis, plants store their energy as
a)chlorophyll
b)pigment
c)glucose (sugar)
d)oxygen
Answer:
C
Explanation:
energy stored as sugar within chloroplasts -- the energy factories found in plant cells.
Which statement correctly compares living things and nonliving things? A. Only living things are made of cells. B. Only nonliving things are made of cells. C. All living and all nonliving things are made of cells. D. All living and some nonliving things are made of cells.
Answer:
A. Only living things are made of cells
Explanation:
Non-living things do not have cells, and in order for something to be considered living, it must contain cells.
Answer:
Living Things
Explanation:
By which process does water vapor become a cloud?
evaporation
transpiration
condensation
precipitation
Answer:
The answer is C.) condensation
Explanation:
Propose an explanation for why populations of top carnivores, such as hawks, are always smaller
than the populations of herbivores, such as caterpillars.
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Answer:
Propose an explanation for why populations of top carnivores, such as hawks, are always smaller than the populations of herbivores, such as caterpillars. Because only ~10% of the energy gets transferred up the pyramid, it takes a lot of the previous level to sustain the next higher level.
one similarity between chlorophyll a and chlorophyll b
Answer:
Both are involved in the process of photosynthesis. The main difference between chlorophyll A and B is their role in photosynthesis; chlorophyll A is the principal pigment involved in the photosynthesis whereas chlorophyll B is the accessory pigment, collecting the energy in order to pass into chlorophyll A
Drag the tiles to the boxes to form correct pairs.
Match the factors with the way in which they can affect a local climate.
Answer:
Latitude- Johannesburg, South Africa, has higher average annual temperatures than Dublin, Ireland.
Ground cover- City officials use a mixture of crushed gravel and limestone instead of blacktop for the new bike trail.
Topography- The leeward side of a mountain receives far less rainfall than the windward side.
Bodies of water- At night, a coastal community enjoys milder temperature than its sister city farther inland.
Elevation- Air molecules are more loosely packed near a mountain peak than they are near the mountain's base.
Explanation:
Answer: right on plato
Explanation:
Considering how the body is organized, give one reason why it is so difficult for scientists to build a heart.
A) The heart is a pump made of muscle and that is difficult to grow in the lab.
B) Even if researchers build a heart, there is no guarantee that a person's body will accept it.
C) Human hearts are not like any other animal hearts so there is not source for cells and tissues.
D) The heart is made up of many different types of cells that are organized into different tissues.
Answer:
I am not sure but I think its A
Explanation:
Did
you have any leftover atoms after creating the
oxygen and the glucose?
After creating the oxygen and the glucose in the process of photosynthesis, there are no atoms left, and the products of the photosynthesis are used for different purposes, such as cellular metabolism and respiration.
What is the importance of the product of photosynthesis?Photosynthesis is a process in which the product is glucose, which is made up of carbon, hydrogen, and the oxygen atom, and the oxygen gas that is released to the environment. Water, which is composed of hydrogen and oxygen, and carbon dioxide, which is composed of carbon and oxygen, are the reactants in this process and make the glucose in the presence of sunlight; further, these are used by animals and plants.
Hence, after creating the oxygen and the glucose in the process of photosynthesis, there are no atoms left, and the products of the photosynthesis are used for different purposes, such as cellular metabolism and respiration.
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The negative impacts of nonnative species generally outweigh the positive impacts. Please select the best answer from the choices provided О T O F
Answer:
true
Explanation
The negative impacts of nonnative species generally outweigh the positive impacts. Thus, the given statement is true.
What are non-native species?An alien or non-native species is the species which has been intentionally or accidentally transported and released into an environment which is outside of its historic or resident geographical range or habitat. The species is introduced into a new habitat. Such species are known as invasive species, if they are ecologically and economically harmful to the environment.
It has been found that the negative impacts of non-native species generally outweighs the positive impacts. This is because, these species disturb the ecosystem of the new environment in which it is introduced. Disturbance in the ecosystem is caused due to disturbance in the food chain.
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PLZ HELP FAST! ILL GIVE BRAINIEST!!
What have we learned from fossil evidence about evolution?
A. It is an abrupt change.
B. The process is observable.
C. It takes place during one lifetime only.
D. The most complex traits are always selected.
Answer:
The answer would be B
is it true that both photosynthesis and cellular respiration use the same substances as reactants in their processes
PLEASE HELP!!! What does the graph indicate about the relative acidity of the stomach and small intestine??
Answer:
That the stomach is more acidic than the small intestine.
Explanation:
If i understand the graph correctly, the graph indicates that the stomach is relatively more acidic than the small intestine. This Is because the data for the stomach (the blue line) is at the left side of the x-axis, from 1 to 5, while the data for the small intestine (the orange line) is more to the right, meaning that the small intestine has a higher pH. The higher the pH, the lower the acidity. So since the stomach has a lower pH, it has a higher acidity.
The stomach is more acidic than the small intestine.
The graph hows the pH of the small intestine and the stomach respectively. We know that the pH is a measure of the acidity or alkalinity of a substance. A pH value of 0 - 6.9 indicates acidity. 7 indicates a neutral substance while 8 - 14 indicates a basic substance.
We can see from the graph that the stomach is more acidic than the small intestine because it has a lower pH which indicates high acidity.
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Coral reefs are actually colonies of small polyps that each live within a hollow cylinder of calcium carbonate, which it excretes. Their tentacles extend above the top of this cylinder and sweep in small organisms and other food scraps. On the outside of the hollow cylinders single-celled green algae live. These algae use the carbon dioxide and nitrogen wastes given off by the corals to produce sugars and oxygen through the process of photosynthesis. The sugar and oxygen are then used by the coral for growth. In addition, the algae are protected by the structure of the reef from animals that might eat them.
a.) Mutualism
b.) Commensalism
c.) Parasitism
d.) Predator-Prey
Based on The endosymbiotic theory, what cell would result from the endosymbiosis of a cell with a cyanbacterium?
A. A eukaryotic cell that can make its own food
B. A prokaryotic cell that can make its own food
C. An aerobic bacterium
D. An anaerobic bacterium
Answer:
a i think
Explanation:
what ae the functions of the temporal lobe
Explanation:
The function of the temporal lobe centers around auditory stimuli, memory, and emotion. The temporal lobe contains the primary auditory complex
GREETINGS!
Temporal lobe is function is auditory perception i.e. hearing also it is concerned with speaking and memory processing because it has hippocampus
A mover lifts a 12-kg box straight up 1.5 m. How much work is done on the box?
Answer:
work done=Force * distance
work done=(12*10)*1.5
work done=120*1.5
working=180j
in which of the following cells would meiosis occur?
Answer: Reproductive Cells
Explanation:
Belle weighs 90 lbs on Earth. If she went to Mercury,
what would change, her mass or her weight? Why?
Answer:
Weight
Explanation:
Mass is the same no matter where, but weight ties in gravity so on Earth and Mercyry, one would weigh differently due to the differing gravitational pulls.
Answer:
her weight would change.
90 pounds (Earth weight) X 0.38 = 34.2 pounds (Mercury weight)
Explanation:
Which has three times as many O atoms than N atoms?
The Answer is B because if we just look at the moles of nitrogen and oxygen they are in the ratio of 1:2. Since there are 3 moles with it, Even if we when we multiply this ratio by 3 the answer will be 3:6 and 6 is the double of 3 so B is the answer
HOPE IT HELPS!
Answer:
b
Explanation:
A young child becomes very sick and his doctor does a series of tests to try to figure out what is causing his illness. His tests show that the child has generalized muscle weakness in many muscles all over his body, cellular damage to his nervous system, and heart irregularities. Because the doctor knows that these organ groups (the brain, the heart, and the muscles) are especially sensitive to cellular energy levels, he believes he has found the answer.
Answer:
Nucleus due to being the control center it might not function correctly due to the fact that
it is the control center and the brain is as well...
Explanation:
Nucleus due to being the control center it might not function correctly due to the fact that it is the control center and the brain.
What is the function nucleus in cell ?The nucleus in eukaryotes are present at the central part of the cell, is the major functional organelle which store a cell’s genetic contents and it helps in cell growth, their function.
It plays an important role in reproduction, prokaryotic cell does not contain nucleus, it is also known as the “brain” of the cell and it control the growth and reproduction, largest and prominent organelle in the cell.
Eukaryotic cell have a single nucleus and have more than one nucleus; red blood cells don’t have a nucleus while muscle cells have multiple nuclei.
The organelle Nucleus have different components like Nuclear Envelope, Nuclear Pores, Nucleoplasm, Chromatin, Nucleolus.
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Which cell structure would you find in a bacteria?
A
nucleus
B
mitochondria
C
ribosome
D
chloroplast
Answer:
nucleus
Explanation: Every single sell must have a nucleus so nucleus is the correct answer.
Ribosome is the cell structure would you find in a bacteria.
Ribosomes are the cellular structures where proteins are synthesized and found in the bacterial cytoplasm.
The cytoplasm is the part of the cell that is within the cytoplasmic membrane and is composed of nutrients, waste, and gases and contains cellular structures such as ribosomes, chromosomes and plasmids.
Bacterial ribosomes consist of two subunits with sedimentation constants of 30 S and 50 S respectively.
The ribosome is active when its two subunits are associated, and the concentration of Mg ++ is of great importance in their association and dissociation process.
In the bacterial cytoplasm there is a clear spatial and functional separation between the central zone.
The nucleoid is located and in which transcription occurs, with respect to the peripheral zone rich in ribosomes, in which protein synthesis occurs.
Therefore, we can conclude that ribosome is the cell structure would you find in a bacteria.
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Explain a time you would need to evaluate something in science.
Answer:
To study if the reuse of industrial treated wastewater may adversely affect life in a river basin system
Explanation:
The process of evaluation in science enables us to understand a given phenomenon from the natural world. Scientists have a standardized-objective method to investigate how the natural world works. This scientific method consists of the following steps: 1- to observe a given phenomenon form the real world, 2- to ask one or more questions about this phenomenon, 3- to raise a working hypothesis in order to explain these questions, 4-to test the hypothesis by experimental and/or observational procedures, 5- to obtain the results and conclusions. In this case, the scientific method can help to understand the effects of the industrial treated water in the life of the river system, and these results could be used as a starting point to predict its effects on other aquatic ecosystems.
In a hypothetical example, an earthquake generated tidal wave destroys
all habitable land one mile in from the coast. All animals within one mile of
the seashore are killed during the event. Is this an example of natural
selection that will result in adaptation, or not? And why?
Which of the following is expected to increase due to change climate?
O A. Sea level
O B. Land area
O C. Sea ice
O D. Freshwater
Answer:
sea level
Explanation:
seal level can higher tempratures
The global warming is the main cause of sea level rise. A warming climate can cause seawater to expand and ice over the land to melt. The Sea level rise due to the change of climate. The correct option is A.
What is sea level rise?The average increase in the water level of the earth's oceans due to the global warming caused by human activities which have increased the greenhouse gases in the atmosphere is defined as the sea level rise.
The gradual increase in the temperature of the earth which is commonly caused by the emission of greenhouse gases like carbon dioxide, chloro fluro carbon and other pollutants is known as the global warming.
The incredible increase in the temperature due to global warming resulted in an increase in the melting of glaciers which have led to an increase in the sea level.
Thus the correct option is A.
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What is shown in the image? (please don't guess. I really need help)
prokaryote
eukaryote
chloroplast
mitochondrion
Answer:
A prokaryote
Explanation:
Answer: prokaryote
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