What is a segment of DNA that is the basic unit of heredity and is transferred from parent to offspring
Answer:
Gene
Explanation:
The gene is a segment of a DNA molecule (deoxyribonucleic acid), responsible for the genetically inherited characteristics. Each gene is made up of a specific DNA sequence that contains a code to produce a protein that performs a specific function in the body. Each human cell has about 25,000 genes.
Most genes are contained in chromosomes. The chromosome is made up of a long chain of DNA wrapped around a special protein called histone. Most chromosomes contain several different genes.
What conclusions about atoms can you draw from the modern atomic model shown below? Choose all that apply.
Answer:
Hi,
The correct answers should be:
Electrons are smaller than protons
The majority of an atom’s mass is in the nucleus
Protons and neutrons are about the same size.
The first option is not true since in the picture you can see three different kinds of particles, while the second one is false since different electrons can occupy different energy levels and the same electron can “jump” from one energy level to another one if stimulated.
Hope this helps! If my answer was not clear enough or you’d like further explanation, please let me know.
Explanation:
Plants, algae and phytoplankton are the main components of the _________ carbon cycle.
Is it fast or slow
Answer: Fast
Explanation: Fast carbon cycle include the process which can circulate the carbon in the ecosystem in comparatively less time. For example, carbon dioxide is taken up by plants and converted into food, which is consumed by animals. Animals then release carbon dioxide which is again consumed by plants. So this is a repeatedly undergoing cycle. The main process involved behind this is photosynthesis. All the three- plants, algae and phytoplanktons perform photosynthesis, so they are the part of fast carbon cycle.
Which of the following processes releases carbon dioxide as waste?
Cell division
Cellular respiration
Photosynthesis
Transpiration
Explain why isostatic rebound slow over time
Answer:
Explanation:
This is due to isostatic equilibrium.
Isostatic rebound occurs when load is added or removed on the lithosphere and the surface either sinks or rises under the weight of the asthenosphere.
At first, when load which can be in form of glacier is added to the lithosphere, this block of the earth would sink rapidly at first due to the added weight. With time, as the adjustment continues, an equilibrium is now reached between the lithosphere and the asthenosphere. At this point, the asthenosphere would have gathered enough strength to carry the overlying weight.
Isostatic rebound is slow due to the viscous nature of the Earth's mantle needing time to adjust after glacial melting. It's evident in regions previously covered by ice, like parts of Canada, where the Laurentide Ice Sheet's melting allows the crust to rise at about 2 cm/year. The gradual rebound continues as the mantle material redistributes over thousands of years.
Isostatic rebound is the process of the Earth's crust rising as the result of the removal of mass, such as the melting of glacial ice. This phenomenon is slow because the Earth's mantle behaves like a viscous fluid over long periods, taking time to adjust and redistribute material after the weight from the ice sheets is removed. Since the last glacial period, regions like Canada and Scandinavia, previously covered by massive ice sheets, have been experiencing this rebound.
The crust sinks under the weight of thick ice accumulations during periods of glaciation. After the ice melts, the mantle underneath, which was displaced to the sides, allows the crust to rise slowly back to its original position. For example, in areas west of Hudson Bay in Canada, where the Laurentide Ice Sheet was the thickest, the crust is rebounding at nearly 2 cm/year, showing some of the highest rates of uplift in the world.
The slow nature of isostatic rebound can be further illustrated through the rebound rates worldwide. In areas like British Columbia, the uplift is weaker compared to regions where the ice was thicker. Such gentle uplifts, particularly in coastal and offshore areas, indicate ongoing adjustments in displaced subcrustal material, a process taking thousands of years.
1. Which of these BEST describes our current understanding about how species evolve over time?
A. As organisms use certain traits more frequently, each organism evolves overtime.
B. Populations of organisms evolve rapidly due to genetic changes brought about by random mating patterns.
C. Traits that result in a greater number of mutations occur more frequently, causing the population to evolve.
D. Populations evolve as natural selection results in a change in the frequency of alleles within the population over time.
2. A change in a sequence of DNA bases in a bacterial cell has resulted in a mutation. This mutation has increased the ability of the bacteria to break down and digest organic molecules in the environment. Bacteria with this mutation are better able to find and utilize food sources. According to the theory of natural selection, what is MOST likely to occur in future generations of this bacteria.
A. The relative frequency of the mutation will increase as time passes.
B. Because the mutation has changed the DNA of the bacteria, a new species will be formed.
C. Because the mutation is abnormal, the mutation will become more rare with every passing generation.
D. Bacteria with the mutation will increase in number until the good supply is exhausted, causing the bacteria to become extinct.
As organisms use certain traits more frequently, each organism evolves overtime is used to describes our current understanding about how species evolve over time.
What do you mean by species?Most evolutionary biologists distinguish one species from another based on reproductivity: members of different species either won't or can't mate with one another, or, if they do, the resulting offspring are often sterile, unviable.
Most people recognize biodiversity by species—a group of individual living organisms that can interbreed. Examples of species include blue whales, white-tailed deer, white pine trees, sunflowers, and microscopic bacteria that can't even be seen by the eye.
Scientists have estimated that there are around 8.7 million species of plants and animals in existence. However, only around 1.2 million species have been identified and described so far, most of which are insects.
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At what phase of the cell cycle is the number of chromosomes per cell doubled?
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all cells (prokaryotic and eukaryotic) have few common features. which cell feature is found in both prokaryotic and eukaryotic cell? A chloraplast B ribosome C nucleus D sodium
The ribosome is a common cell feature between prokaryotes and eukaryotes. So the correct option is B.
What are ribosomes?The process of making proteins in a cell takes place at an intercellular structure called a ribosome, which is formed of both RNA and protein. The messenger RNA (mRNA) sequence is read by the ribosome, which then converts the genetic code into a specific string of amino acids that develop into extended chains and fold to create proteins.
The biological machinery that produces proteins is known as a ribosome. Each cell has several ribosomes, which are each composed of two subunits. These two subunits form a tight seal around the messenger RNA molecule before moving down its length and reading each three-letter codon.
The transfer RNA, whose base sequence matches that of the messenger RNA, docks to the ribosome. A specific amino acid can be added to the end of the expanding protein chain by pairing each three-letter messenger RNA codon with the corresponding anticodon on a particular transfer RNA. Once the protein is finished, the ribosome fragments.
Therefore the correct option is B.
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animal researchers refer to the process of filtering out sights, scents, and sounds that have little effect on survival as
What is not an example of an ecosystem?
Question 1 options:
carbon dioxide
tide pool
prairie
digestive system
which rock unit was formed most recently
Which of the following types of electromagnetic radiation has the shortest frequency? (2 points) Infrared waves Microwaves Ultraviolet waves X-rays
The human activities in two locations are described below:
Location A: Rampant use of plastic containers
Location B: Excessive use of pesticides and fertilizers
Which statement is most likely true?
A.) Location A will have poor air quality because plastic is biodegradable.
B.) Location A will experience water scarcity because plastic absorbs moisture.
C.) The population of birds will increase in Location B because production of crops will increase.
D.) The population of aquatic plants in Location B will decrease because water is contaminated.
Answer: D.) The population of aquatic plants in Location B will decrease because water is contaminated.
Explanation:
The population of aquatic plants in Location B will decrease because
water is contaminated.
What is Contamination?This involves the presence of impurities and unpleasant elements in an
area.
The excessive use of pesticides and fertilizers in areas will result in it
seeping inton the ground and into water bodies. The animals present in
the water body will die as a result of the harmful chemicals which is
present.
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Little Joey jumps into a pool on a cool fall morning. How can we describe the direction of energy transfer and temperature change between Joey and the water? A) Energy is transferred from Joey to the water. The temperature of the water increases. B) Energy is transferred from the water to Joey. The temperature of the water increases. C) Energy is transferred from the water to Joey. The temperature of the water decreases. D) Energy is transferred from the Joey to the water. The temperature of the water decreases.
Answer: A) Energy is transferred from Joey to the water. The temperature of the water increases.
If Little Joey jumps into a pool on a cool fall morning, heat energy from Joey’s body is transferred to the cold water increasing its temperature. It is called conduction.
Lf cows produce more milk when fed wheat then the cows that were not fed wheat will produce less milk
Answer:
the student is forming an hypothysis
Explanation:
if, then statements
When comparing bones from ancient fossils and modern bones--what is the primary technique do scientists use to compare the bones? Question 3 options: Chemical composition of bones DNA printing Bone density Observation with eyes
how might the seasonal patterns of insect populations relate to the seasonal patterns of bird populations
Outline THREE uses that cells make of energy released by ATP.
Final answer:
Cells make use of the energy released by ATP in active transport, mechanical work, and biosynthesis.
Explanation:
Cells make use of the energy released by ATP in multiple ways:
Active transport: ATP powers the movement of molecules across cell membranes, against their concentration gradients. This includes the transport of ions, such as sodium and potassium, across nerve cell membranes for nerve impulse transmission.
Mechanical work: ATP provides the energy for muscle contraction and movement. When myosin heads bind to actin filaments, ATP is hydrolyzed to provide the necessary energy for muscle contraction.
Biosynthesis: ATP is used in various biosynthetic pathways to provide energy for the synthesis of complex molecules, such as proteins, nucleic acids, and carbohydrates. For example, ATP is required for adding new nucleotides to a growing DNA strand during DNA replication.
Which of these statements about common names are true? Check all that apply. Common names are physically accurate descriptions of organisms. Multiple organisms can be called by the same common name. Multiple common names can be applied to one organism. Common names are uniform across the globe. Common names do not always translate accurately.
Answer:
Explanation:
The common name in biology can be defined as the name of a taxon or organism that is based upon the common language. The common name may vary depending upon the local language and country. It is the frequently used name.
Among the options given, following are correct:
1. Multiple organisms can be called by the same common name.: For example, various species of wolves can be commonly called as wolf.
2. Multiple common names can be applied to one organism.: For example, common name of rice can be paddy, sake and others.
3. Common names do not always translate accurately: Due to diversity of languages in the world the common names do not always translate accurately.
Common names for organisms can be ambiguous and are not used universally. Instead, the binomial naming system provides a unique and universally recognized name for every organism, like Homo sapiens for humans. This avoids confusion and facilitates global scientific communication.
Explanation:In relation to common names:
Common names are not physically accurate descriptions of organisms.Multiple organisms can be called by the same common name.Multiple common names can be applied to one organism.Common names are not uniform across the globe.Common names do not always translate accurately.The binomial naming system, introduced by Carl Linnaeus, helps provide a unique and universally recognized name to every organism, which includes the genus and species name, such as Homosapiens for humans. This system avoids the confusion that can arise from the use of common names, which can be variable and not specific to one organism. Common names can vary across different cultures and languages, which highlights the importance of the scientific naming system in global scientific communication.
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Which of the following is an example of chemical potential energy? A. a person swinging a bat B. an unlit match C. a stretched rubber band D. a boulder on a hill
The correct answer is D. a boulder on a hill.
Chemical potential energy is the energy stored in the bonds between atoms and molecules. It is the energy that holds compounds together and can be released or absorbed during chemical reactions.
Let's analyze each option:
A. a person swinging a bat: This is an example of kinetic energy (the energy of motion) and also potential energy due to the position of the bat in the gravitational field, but it is not chemical potential energy.
B. an unlit match: This is a tricky option because an unlit match does contain chemical potential energy in the form of the match head's chemicals. However, the question asks for an example of chemical potential energy, and while the match head does contain this type of energy, it is not the best example among the options provided because it is not actively demonstrating the release of chemical potential energy until it is struck and lit.
C. a stretched rubber band: This is an example of elastic potential energy, which is the energy stored in elastic materials due to stretching or compressing.
D. a boulder on a hill: This is an example of gravitational potential energy, which is the energy stored in an object due to its position in a gravitational field. It is not an example of chemical potential energy.
Therefore, the most appropriate answer is D. a boulder on a hill, as it directly represents potential energy, although it is gravitational rather than chemical. However, if we strictly consider chemical potential energy, none of the options provided are correct. The unlit match (B) would be the closest to representing chemical potential energy, but it is not actively demonstrating this energy until it undergoes a chemical reaction when lit."
Which of the following are limitations of HMO plans? (Select all that apply.)
higher patient costs
limited number of healthcare providers
limited coverage for healthcare services
strict eligibility requirements
Answer:
The best answer choices for question: Which of the following are limitations of HMO plans, would be: B: Limited number of healthcare providers, and C: Limited coverage for healthcare services.
Explanation:
An HMO, is known as a Health Maintenance Organization and it is the basic coverage plan offered by insurance companies to people to ensure their healthcare coverage. There are several benefits to this system of healthcare, including lesser deductibles, However, one issue with them is that those covered require the attendance of a PCP, or primary care physician for most of their needs, and they cannot ask for specialists unless authorized by the PCP. Also, they have lesser access to certain services, unless they have out-of-pocket expenses covered. This is why the answer is B.
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A turbidity current is an underwater:
earthquake
avalanche
alluvial fan
moraine
The answer is earthquake.
Answer:
avalanche
Explanation:
i took a test and the correct answer is avalanche
How do scientists determine when an era ends and an era begins
Scientists determine the beginnings and endings of eras based on significant shifts in Earth's geology and life forms, often identified through major geological events and changes in the fossil record. Each era in geologic time represents long time spans categorized by distinct characteristics. Scientists use fossil records, geological markers, and research to define these eras and their transitions.
Explanation:Scientists, specifically geologists and paleontologists, determine when an era ends and a new one begins based on significant shifts and changes in the Earth's geology and its life forms. This is often identified through the fossil record and major geological events. For example, the end of the Cretaceous era is marked by a significant mass extinction event, including the disappearance of dinosaurs.
An era in geologic time is a long time span, typically billions of years, categorized by distinct characteristics, such as the presence or absence of certain types of fossils. Each era is then divided into periods, epochs, and ages which relate to marked changes in the fossil record or geologic events.
In essence, scientists use a combination of fossil records, geological markers, and ongoing research to define eras and their transitions. This makes the understanding of Earth's history more organized and comprehendible.
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what do the lichens and mosses produce to break down rocks to begin the formation of soil
Out of the following given choices
A. acids B. nutrients C. roots D. soil?
The answer A. Lichens and Moses secrete organic acids. An example of a secreted organic acid is oxalic acid. These acids react with mineral in the rocks hence dissolving them. Their decaying vegetation (humus) also produces acids that weather the rocks. Another way these plants break rocks are physically using their roots that grow in the cracks and grow bigger.
A pea plant with round seeds (RR) is crossbred with another pea plant with wrinkled seeds (rr). What is the probability of the offspring having wrinkled seeds? 0% 25% 50% 75%
Answer:
0%
Explanation:
The cross of a pea plant with round seeds (RR) with another pea plant with wrinkled seeds (rr) is shown as under :
P RR x rr
F1 Rr Rr Rr Rr
It is clear from the cross above, all the 4 probable progenies in filial 1 (F1) generation will be heterozygous with Rr genotype. Not even a single progeny will have homozygous recessive genotype which is responsible for producing wrinkled seeds. Also, even though the genotype of the progenies will be Rr not RR yet phenotypically they all will have round seeds i.e. they will show dominant trait. The reason behind it is that one of the alleles R which is responsible for dominant trait will mask the expression of recessive allele r. So, wrinkled phenotype which is a recessive trait will not be observed in any of the progenies.
ulia demonstrated the formation of a type of rock. She mixed egg, salt, and herbs and cooked the mixture over a flame. The egg turned into an omelet.
The formation of which type of rock did Julia demonstrate?
Eroded rock
Igneous rock
Metamorphic rock
Sedimentary rock
Answer:
Metamorphic rock is correct
Explanation:
Factories and cars release pollutants into the atmosphere. These pollutants can dissolve in the water vapor in the atmosphere. What is a LIKELY result of the mixing of pollutants with water vapor?
A) drought
B) acid rain
C) brush fires
D) heavy rainfall
1. According to the diagram, which organism is the producer in the meadow
A. Corn Snake
B. Field Mouse
C. Grass
D. Hawk
2. According to the diagram, which organism in the food chain occupies the highest trophic level?
A. Corn Snake
B. Field Mouse
C. Grass
D. Hawk
Answer:
Therefore, In 1 option C is correct .
In 2 option D is correct option .
Explanation:
In this food chain, the grass, since it is a autotrophic organism is the producer.
The trophic level of an organism is the position it occupies in a food chain.
In this diagram at last position is hawk which eat the snake that mean it has highest trophic level.
Which of the following rocks most likely resulted from compacting and cementing particles together? A. slate B. pumice C. marble D. sandstone
Sandstone is the class of rocks which are most likely to be resulted from compacting and cementing particles together in space. Thus, the correct option is D.
What are Sandstone?Sandstone is a clastic sedimentary rock which is composed mainly of the sand-sized silicate grains. The sandstones comprise about 20-25% of all the sedimentary rocks present on the planet. Most of the sandstone is composed of the quartz material or feldspar because they are the most resistant minerals to weathering processes at the Earth's surface.
Sandstone represents the ancient stream, deltaic, or beach deposits. Uses for these sandstone include liners for steel furnaces, as the building stone, as an abrasive, for the golf-course trap sand, and in the making of glass, computer chips, fiberglass, TV screens, and other paint.
Therefore, the correct option is D.
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When the heterozygous genotypes results in a phenotype where both alleles are fully and separately expressed
Codominance is a condition where both alleles are fully and separately expressed in a heterozygous genotype. An example is the blood types in humans, where IA and IB alleles are codominant, resulting in the AB blood type.
Explanation:When both alleles are fully and separately expressed in a heterozygous genotype, this is called codominance. In codominance, both alleles affect the phenotype in separate and distinguishable ways. For example, in the case of blood type, a person can have the genotype IAIB, which represents type AB blood. Here, both IA and IB alleles are codominant, resulting in a phenotype (blood type) where both alleles are expressed. This is different from incomplete dominance, where the phenotype of the heterozygous genotype is an intermediate expression of two alleles.
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