Answer:
the answer is d
Explanation:
In a normal radium atom, there are 7 energy levels.
The periodic table is arranged in groups and periods. The elements in a group have the same number of valence electrons while the elements in the same period have the same number of energy levels.
Radium is an element in period 7. The fact that it is in period 7 implies that it has 7 shells or energy levels. Hence, in a normal radium atom, there are 7 energy levels, each containing electrons.
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please helpppppppppppppppppppppppppppppppppppp
Answer:pick b
Explanation:
pick.b
The two sides of the DNA helix are held together by
Answer:
The two sides of the DNA helix are held together by
What happens when an ecosystem has high amounts of nutrients for a living thing? Explain
This is a school assignment please help I will mark brainlliest.
(This is 7th grade science).
Answer:
the plants will overgrow/overpopulate which causing overcrowding of other plant species
Explanation:
Add evidence based on reading: Read the section titled: Station A: Similar Embryos. Based on the reading and the pictures in the chart-how does the similarity of embryos across species provide evidence for evolution.
Answer:
Yes, the similarity of embryos across species provide evidence for evolution. The similarity of the embryos indicates that they evolved from the same common ancestor, the embryos at letter A clearly indicates this.
Explanation:
Light material floated up and became the early mantle and crust while iron and nickel pulled to the center of Earth. Which answer uses the word "light" in the SAME way as the sentence above? Group of answer choices A. If the power goes out, they will have to light candles. B. The sudden, bright flash of light woke him up. C. After the injury, she was only able to lift light objects D. Her mother gave her a light kiss before she left for school.
Answer:
C. After the injury, she was only able to lift light objects.
Explanation:
"Light material floated up and became the early mantle and crust while iron and nickel pulled to the center of Earth" In this sentence, the word light is an adjective that means of little weight. Sentence C uses light in the same way because it is referring to objects that are easy to move since they are not heavy.
In option A, the word light is a verb that means to burn a candle to let them see.
In option B, the word light is a noun that is the brightness that allows us to see.
In option D, light is an adjective that modifies the noun kiss. It describes a delicate, small kiss.
How would the world be different if ice were more dense than water?
Answer: B
Answer:
B
Explanation:
Answer:
B
Explanation:
Why are scientific explanations subject to change?
A)
Scientists always need better technology.
B)
Scientific explanations are only a best guess.
C)
New scientific explanations are always better than old explanations.
D)
Scientific explanations are based on new observations and making sense
out of those observations
Answer:
D
Explanation:
Which statement does NOT correctly describe a difference between a rock and a mineral?
A. Minerals are found in all types of environment while rocks are found in specific environments.
B. A mineral has a definite crystal structure which is not the case in a rock.
C. The hardness of a mineral is greater than that of a rock.
D. The composition of a mineral is uniform while a rock's is not.
The use of biomass as a renewable source of energy in certain parts of the world, Like Haiti, is a common practice. However, this
practice is not without environmental consequences. What indoor air pollutant is commonly formed from the incomplete
combustion of wood and charcoal inside homes and buildings?
A)
carbon monoxide
B)
carbon dioxide
C)
radon gas
D)
methane
Which of the following statements about change in ecosystems is true?
a. Ecosystems experience change through human activity only
b.
Ecosystems experience change through natural events only
C. Ecosystems experience no change.
d. Ecosystems experience change through human activity and natural events
Please select the best answer from the choices provided
Ο Α
B
С
D
what is DNA simplified answer please
Answer:
Deoxyribonucleic Acid
Explanation:
Study the graph above. What does this graph suggest about the relationship between human population and extinction rate
A)
As human population increases, extinction rates also increase.
B)
Human population is increasing, while extinction rates are decreasing.
C)
In order for the extinction rate to slow, the human population must
increase
D)
There is an inverse relationship between human population and extinction
rates.
Answer:
A
Explanation:
as human population increases so does extinction
The graph shows that there is a direct correlation between the human population and the extinction rate.
Graphical IllustrationFrom the graph, as the population of humans increases, the extinction rate also increases. Similarly, a decrease in the human population also results in a decrease in the extinction rate.
Thus, it can be concluded that there is a direct correlation between the population of humans and the extinction rate as far as the graph is concerned.
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Write down the name of two trivalent and two bivalent radicals.
Which statement accurately describes the energy needs for cellular respiration and photosynthesis?
A. Solar energy is needed for cellular respiration but not for photosynthesis.
B. Solar energy is needed for photosynthesis, and chemical energy in the form of glucose is needed for cellular respiration
C.Chemical energy in the form of glucose is needed for photosynthesis, and solar energy is needed for cellular respiration.
D. Chemical energy in the form of glucose is needed for both cellular respiration and photosynthesis,
Answer:
Solar energy is needed for photosynthesis, and chemical energy in the form of glucose is needed for cellular respiration.
How did the carrying capacity of bats change between Year One and Year Two?
Answer:
As competition increases and resources become increasingly scarce, populations reach the carrying capacity (K) of their environment, causing their growth rate to slow nearly to zero. This produces an S-shaped curve of population growth known as the logistic curve (right).
Explanation:
Due to the Earth's shape and orientation, areas near the Equator receive the greatest amount of energy from the Sun. Ocean currents
Complete question:
Due to the Earth's shape and orientation, areas near the Equator receive the greatest amount of energy from the Sun. Ocean currents
A. move only away from the equator as a result.
B. help to distribute this energy by warming other regions of the globe.
C. move only toward the equator as a result.
D. keep this energy concentrated in one region of the globe
Answer:
B. help to distribute this energy by warming other regions of the globe.
Explanation:
Heat it gained in equatorial latitudes and lost in higher latitudes. Winds and marine currents redistribute the heat around the earth. The ocean clime is influenced by winds, and show a lower thermic amplitude than continental climes due to a bigger redistribution of heat by the currents.
There exist horizontal water movements that are produced by the action of different winds on the ocean surface. Superficial winds, influenced by the Coriolis effects, are responsible for most of the marine currents.
Trade winds push the water surface forward western direction in the equator, while western winds produce currents that move water to the east at higher latitudes. By the Coriolis effect, water masses are deviated to the west or the east, depending on the hemisphere, and result in large clockwise circular turns in the Northern Hemisphere, and in the opposite direction in the Southern Hemisphere.
Warmer currents travel from the tropics, along the continental margins, carrying warm water to higher latitudes, and as they do so, these water masses get cooler, producing cold currents.
There also exist vertical water movements, such as the ascendant “upwelling” currents that transport cold water with nutrients from the bottom to the surface. Through trade winds at higher latitudes, surface water is diverted out to sea, making a place for the ascent of cold water from the deep. At tropical latitudes, descendent “downwelling” currents occur. Dense cold water from the poles descends as they get in touch with warmer water from lower latitudes.
Answer:
help to distribute this energy by warming other regions of the globe.
Help me plz ASAP! Ty boys and girls
Answer:
Sorry im late but it would be photosynthetic cells.
what are some connections of photosynthesis to the real world?
Answer:
Green plants and trees use photosynthesis to make food from sunlight, carbon dioxide and water in the atmosphere: It is their primary source of energy. The importance of photosynthesis in our life is the oxygen it produces. Without photosynthesis there would be little to no oxygen on the planet.
Explanation:
:)
Which mutation would NOT cause a change in an organism's phenotype?
Answer:
B)TAT becomes TAC
Explanation:
since thymine(T) pairs with adenine(A), thymine(T) is replaced with uracil(U) in the RNA and guanine(G) pairs with cytosine(C)
we can find the complementary codons for each strand
the codon for TAT is AUA which codes for methionine
the codon for TAC is AUG which also codes for methionine
that means the phenotype (methionine)remains unchanged for different genotypes(TAT and TAC)
Answer:
A silent mutation does not produce a phenotype change. Explanation: In point mutations, a base pair of the DNA sequence is altered.
Explanation:
Linda is a forensic entomologist. At a crime scene, she notes that there are several Piophilidae, or cheese skippers, on the body. Which stage of decomposition has the body reached? A. protein fermentation B. rigor mortis C. primary flaccidity D. pallor mortis
Answer: Forensic entomologists are the people which in solving the forensic investigations or cases in which they tend to study the life cycle of the insect which is found on the body of the dead person.
Explanation:
There are various stages of decay of body and different life cycle of insects or insects are found at different stages of decay of the dead body.
Out of those, cheese skippers or Piophilidae are found on the stage when there is protein fermentation in the body.
This is advanced stage or we can say later stage as these insects are not interested in the body when it is fresh, it usually appears during the time of protein fermentation.(option A)
Answer:
Forensic entomologists are the people which in solving the forensic investigations or cases in which they tend to study the life cycle of the insect which is found on the body of the dead person.
Explanation:
If the temperature outside is 35
degrees Fahrenheit what type of
precipitation is likely to occur? Why?
PLZ EXPLAIN WHY
Answer:
Rain: Rain made of liquid water droplets falls when temperatures in the air and at the surface are above freezing (32°F, 0°C).
Explanation:
As average temperatures at the Earth's surface rise, more evaporation occurs, which, in turn, increases overall precipitation. ... In addition, higher temperatures lead to more evaporation, so increased precipitation will not necessarily increase the amount of water available for drinking, irrigation, and industry.
Freezing rain is simply rain that falls through a shallow layer of cold temperatures at or below 0 degrees Celsius (32 degrees F) near the surface. When this rain becomes supercooled, it can freeze on contact with roads, bridges, trees, power lines, and vehicles.
different organ systems are, look at the last slide of today's presentation.
mustcular, circulatory
NURUNUN
How was the simulation different from how body systems interact to maintain
homeostasis in real life? (2 pts)
Your an Twer
Define homeostasis in your own words. (2 pts)
Answer:
The tendency to maintain a stable, relatively constant internal environment is called homeostasis. The body maintains homeostasis for many factors in addition to temperature. For instance, the concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose.
The main organic source of energy for living things is
Answer:
The Sun
Explanation:
Nearly everything eats sunshine – or eats something else that ate sunshine. The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter.
Which of the following would be the correct mRNA sequence for the DNA of the light colored moths...
Answer:
There are no options but the question can be answered based on general understanding. The mRNA sequence is:
CGU AGG CUU AGC
Explanation:
Transcription is the process by which DNA template is used to synthesize a mRNA sequence. The transcription process, which occurs in the NUCLEUS, follows the complementary base pairing rule, which states that an Adenine will always pair with Thymine (Uracil in RNA), while the Guanine will always pair with Cytosine i.e. A-U, G-C.
According to the image in this question, it shows the DNA sequences of a light and dark colored moth (mutant). The DNA sequence of the light colored moth is as follows: GCA TCC GAA TCG.
Using the priniples of complementary base pairing, the mRNA sequence of this DNA template will be: CGU AGG CUU AGC
Which of the following statements about exponential growth curves is true?
a. Exponential growth curves are common for R-selected species.
b. Exponential growth curves show fast growth rates followed by slow growth rates,
C. No organisms in nature experience exponential growth rates.
d. Exponential growth curves are S-shaped.
Please select the best answer from the choices provided
Ο Α
ОВ
OD
Answer:
a
Explanation:
i really don't know but it might be a
A scientist with the EPA examining water for contamination writes down that there was an iridescent sheen on the surface of the water. What type of data did the scientist record
Answer: Qualitative data
Explanation:
Since we are informed that the scientist writes down that there was an iridescent sheen on the surface of the water, this is a qualitative data.
Qualitative data is a firm of data that one can observe and then record. It should also be noted that it is non numerical. It can be gotten from observations, conducting focus groups, having a one-to-one interviews, etc.
Answer: this is qualitative and categorical (binary) data
Explanation:
There are no measurements. The observation is qualitative: observation of some change in appearance. It is categorical in that the possible values are only ‘no sheen’ or ’sheen’.
One way to determine if a rock sample is metamorphic is by:
a.
finding fossil evidence
c.
noting a crystalline structure in its particles
b.
noticing light and dark color bands
d.
all of the above
Answer:
C
Explanation:
Question:
One way to determine if a rock sample is metamorphic is by
Answer: C
Notes:When rock changes into metamorphic rock, its appearance, texture, crystal structure, and mineral content change.
Help me find mariah025 please
Answer:
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3. Organisms that are NOT autotrophs
A. can survive without energy
B. get energy from sunlight
C. make their own food
D. must feed on different organisms to get energy
Answer:
The answer is D.
Explanation:
Autotrophs are known as producers which gets energy from sunlight and produces their own food.
Which of the following is NOT an organell DNA can be found in?
Answer:
The answer is A
Explanation: