Answer:
i think its A
Explanation:
i mean frogs lay there eggs in water
Amphibians typically lay their soft-shelled eggs in water to protect them from drying out, which aligns with their dual life stages of living in water as larvae and on land as adults.
Explanation:Amphibians, a category of animals that includes frogs, toads, and newts, typically lay their soft-shelled eggs in water (Option A). This is because their eggs lack the hard, protective covering found in bird and reptile eggs, which leaves them vulnerable to desiccation, or drying out. Laying eggs in water helps keep them moist and viable. This is a significant characteristic of amphibians, which are known for their dual life stages: one in water (as larvae) and one on land (as adults).
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Explain how the random alignment of homologous chromosomes during metaphase I
contributes to variation in gametes produced by meiosis.
Long answer+ good explanation and you WILL get the the brainless answer mark.
The randomness in the alignment of recombined chromosomes at the metaphase plate, coupled with the crossing over events between nonsister chromatids, are responsible for much of the genetic variation in the offspring. To clarify this further, remember that the homologous chromosomes of a sexually reproducing organism are originally inherited as two separate sets, one from each parent. Using humans as an example, one set of 23 chromosomes is present in the egg donated by the mother. The father provides the other set of 23 chromosomes in the sperm that fertilizes the egg. Every cell of the multicellular offspring has copies of the original two sets of homologous chromosomes. In prophase I of meiosis, the homologous chromosomes form the tetrads. In metaphase I, these pairs line up at the midway point between the two poles of the cell to form the metaphase plate. Because there is an equal chance that a microtubule fiber will encounter a maternally or paternally inherited chromosome, the arrangement of the tetrads at the metaphase plate is random. Thus, any maternally inherited chromosome may face either pole. Likewise, any paternally inherited chromosome may also face either pole. The orientation of each tetrad is independent of the orientation of the other 22 tetrads.
Explanation:
The assortment of homologous chromosomes during meiosis is random and generates genetic variation, the raw material for evolution.
During metaphase I of meiosis, homologous chromosomes are lined up at the equator plate of the cell in order to be separated (assorted) in anaphase I.
The separation of homologous chromosomes during meiosis I is random, thereby daughter cells receive different gene combinations from an original parent cell.
Subsequently, haploid cells obtained from two successive meiotic divisions fuse during fecundation to form a diploid (2n) zygote.
Moreover, during prophase I non-sister chromatids interchange genetic material by a process known as recombination, thereby this genetic process also increases genetic variation in daughter cells.
In conclusion, the assortment of homologous chromosomes during meiosis is random and generates genetic variation.
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Which trait is heterozygous?
A- Aa
B- aa
C- AA
Answer:
A.) Aa
Explanation:
A heterozygous gene is known as having two different alleles of a particular gene or genes. The correct answer is option A because both letters are different, versus the other two options where both are capital or lowercase.
how is nitrogen obtained by animals
Answer
Animal obtain nitrogen from
Plant and microbes which has ability to fix nitrogen
Geographic range for amoeba?
Identifying the Contribution of Scientists
Determine which scientist made each contribution.
was the first to use word "cell"
Robert Hooke
Anton van Leeuwenhoek
observed "animalcules"
observed cork cells
used polished lens
) Intro
✓ Done
Robert Hooke observed cork cells first used the word "cell".
Anton van Leeuwenhoek used polished lens observed "animalcules"
Explanation:
Anton van Leeuwenhoek is known as father of microbiology. He is credited to improve the quality of lens in microscope. His first observation of organisms called animalcules.
He is credited to have build microscope that could get magnified by 200 times. He used word animalcules for small organisms from pond water when first observed in microscope. He discovered protozoa and named it animalcules".
Robert Hooke is famed for discovering cell from a cork of plant. He observed a compartment or honey comb like divisions when observed these cork cells under the microscope and named it cell. He was only able to see the cell wall as the cork cells are dead cells.
Robert Hooke and Anton van Leeuwenhoek made significant contributions to cell biology by observing and describing cells under a microscope.
Explanation:The scientist who was the first to use the word "cell" was Robert Hooke. He observed cork cells under a microscope and described them as cellulae, meaning small rooms or chambers. Another scientist, Anton van Leeuwenhoek, observed "animalcules", or microorganisms, using a microscope. Both scientists played important roles in the discovery and understanding of cells.
Additionally, Robert Hooke used a polished lens to magnify and observe microorganisms and cells. This led to the development of the microscope and further advancements in cell biology.
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How are coal, oil and natural gas distributed unevenly on Earth?
Answer: Most natural resources, including fossil fuels, are not distributed evenly around the Earth. Deposits of fossil fuels depend on the climate and organisms that lived in that region millions of years ago, and the geological processes that have since taken place.
Explanation: The distribution of natural resources depends upon many physical factors like land, climate and altitude. The distribution of resources is unequal because these factors differ from place to place on this earth.
Final answer:
Coal, oil, and natural gas are fossil fuels whose uneven distribution is influenced by geologic formations, which vary around the world. Oil and natural gas have limited reserves and are concentrated in certain regions, while coal is more abundant but harder to extract and transport. Conservation and exploration of alternative energy sources are increasingly important as fossil fuel reserves dwindle.
Explanation:
Coal, oil, and natural gas are distributed unevenly across the Earth due to a variety of geological, geographical, and historical factors. Coal, which makes up more than 90% of the world's fossil fuel reserves, is relatively abundant and primarily used for electricity generation. However, it is more difficult to mine and transport than oil (petroleum) or natural gas. Oil production requires specific biological conditions for the creation of enough plankton and the right geologic conditions to preserve and alter the organic matter, which takes a million years or more. Natural gas, often found in association with oil, has different types of reserves, some of which can be extracted conventionally, while others require methods like hydraulic fracturing.
Because of these complex processes, fossil fuels are not equally distributed around the world. The use of these resources has steeply increased over time, not only due to population growth but also because of a rise in energy consumption per capita. With current estimates suggesting that known reserves of petroleum might be exhausted in about 60 years and natural gas in about 120 years, the uneven distribution poses significant challenges for energy security and policy. The world's oil supply is largely concentrated in OPEC countries, which hold considerable sway over global oil production rates, while coal reserves are more widespread, with countries like the U.S. having large supplies. Conservation and alternative energy sources are becoming more critical as these resources deplete.
Describe how air masses move.
Answer:
The movement of air masses is due to changes in the weather pattern.
Explanation:
air masses are basically huge regions of air that share similar characteristics like- temperature, ground surface conditions, humidity and moisture. They are build due to stagnant air around a particular region for quite a period of time.
jet streams also known as steering winds play an important role in navigating or steering the air masses. The cold air masses are directed to lower latitudes and the hot air masses are directed towards higher latitudes.
Due to the temperature differences between the cold and hot air masses the steering wind increases. Therefore, moving the air mass away from its originated regions.
What type of UV light is used in tanning beds, and
why is it so dangerous?
Answer:
UVA light is dangerous because it penetrates multiple layers of the skin. Some tanning beds also emit UVB light. Exposure to UV light in tanning beds can age skin and greatly increase the risk of skin cancer.
Explanation:
Answer:
Tanning beds use UVA light.
The concentration of UVA rays from tanning beds is greater than from the Sun.
UVA light is dangerous because it penetrates multiple layers of the skin.
Some tanning beds also emit UVB light.
Exposure to UV light in tanning beds can age skin and greatly increase the risk of skin cancer.
Explanation:
Vomiting is a response that allows animals to do what
What is the best index fossil? (I don't need a full CERC.)
Answer:
i dont know um maybe 2
Explanation:
9. Surtsey is an island located south of Iceland that was formed by a volcanic eruption. Surtsey first
appeared in the 1960s. Ecologists documented the stages of succession as found below:
A. Dwarf willow trees begin to grow on the island.
B. Mosses, lichens, and plants that are adapted to be dispersed by the wind or sea and able to grow in
the sand appear on the island.
C. Vascular plants included sea lyme grass and oyster plants appear.
D. The lava and sand formation that resulted from the eruption are barren with few nutrients.
Answer:
its d
Explanation:
Ecologists documented the stages of succession. The correct order is D-B-C-A. The lava and sand formations that resulted from the eruption are barren with few nutrients. This is the initial stage of succession, and it is characterized by the absence of life.
The next stage of succession is the establishment of pioneer species. These are species that are able to live in harsh conditions and that can help to improve the soil quality. Pioneer species on Surtsey included mosses, lichens, and plants that are adapted to be dispersed by the wind or sea and able to grow in the sand.
As the soil quality improves, other species, such as vascular plants, can begin to grow. Vascular plants include sea lyme grass and oyster plants. These plants are able to further improve the soil quality, and they can also provide food and shelter for other organisms.
The final stage of succession is the establishment of a climax community. A climax community is a stable community that is in equilibrium with its environment. The climax community on Surtsey is likely to be a forest, but it will take many years for this community to develop.
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Water molecules in lakes and the atmosphere and many miles
apart from each other. What processes allow water molecules
to move between these areas despite so much distance
between them?
Answer:
Evaporation is the process which allow water molecules to move between lakes and the atmosphere.
Explanation:
Evaporation is a process in which water which is present in liquid form in lakes and ocean evaporated in the form of water vapours. These vapours goes upward and form clouds which moves toward hilly areas with the help of wind. The water present in the clouds come back to the land in the form of rainfall and snowfall. This water flows through the streams and collected in the rivers again and repeat this process.
Describe how the central nervous system differs from the autonomic nervous system.
Answer: Autonomic: Acting or occurring involuntarily, without conscious control. Central nervous system: The part of the peripheral nervous system that transmits signals from the central nervous system to skeletal muscles, and from receptors of external stimuli, thereby mediating sight, hearing, and touch.
Explanation:
Answer:
Explanation:
The major differences between the two systems are evident in the responses that each produces. The somatic nervous system causes contraction of skeletal muscles. The autonomic nervous system controls cardiac and smooth muscle, as well as glandular tissue.
3. The similarities of a bird's wing and an insect's wing are evidence of
A)divergent evolution
B)analogous structures
C)vestigial structures
D)homologous structures
Answer: analogous structures
Explanation:
Which of these events occurs during the normal function of ATP in the cell?
ATP stores and releases energy during the normal function in the cell. It is used for various cellular tasks such as growth, movement, and active transport. ATP regeneration occurs through substrate-level phosphorylation and oxidative phosphorylation processes.
Explanation:During the normal function of ATP in the cell, energy is stored and released. ATP molecules store energy through the synthesis process and then release a controlled amount of energy during the breakdown process. This energy is used by the cell to perform various tasks such as growth, movement, and active transport.
For example, ATP is required to move sodium ions against their concentration gradient outside the cell. ATP is also required for the entry of potassium ions inside the cell.
The two processes involved in ATP regeneration are substrate-level phosphorylation and oxidative phosphorylation. Substrate-level phosphorylation occurs directly in metabolic reactions, while oxidative phosphorylation takes place in mitochondria and involves a more complex process called chemiosmosis.
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The correct event that occurs during the normal function of ATP in the cell is the chemical bond breaks between the second and third phosphate groups. ATP is a molecule of adenosine triphosphate that consists of an adenine unit, a ribose unit, and three phosphate groups. The high-energy bond between the second and third phosphate groups is broken to release energy for cellular processes.
therefore correct option (d).
Explanation:The correct event that occurs during the normal function of ATP in the cell is d. the chemical bond breaks between the second and third phosphate groups. ATP is a molecule of adenosine triphosphate that consists of an adenine unit, a ribose unit, and three phosphate groups. The high-energy bond between the second and third phosphate groups is broken to release energy for cellular processes.
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therefore question given below:
Which of these events occurs during the normal function of atp in the cell? a. a chemical bond forms between the adenine unit and the third phosphate group. b. the chemical bond breaks between the adenine and ribose units. c. the chemical bond breaks between the ribose unit and the first phosphate group. d. the chemical bond breaks between the second and third phosphate groups.v
Describe how stella's view of these cells and their parts changed as she transitioned through the three levels of magnification. Be sure to identify at least one cell structure or part of the paramecium in your description
Stella's view of the cells improved as she increased the magnification level, from seeing closely packed cells at the scanning objective level to identifying individual cells and structures such as the pellicle within the Paramecium cell at the high-power objective level, where she also noticed cells at the interphase period of the cell cycle.
Explanation:In the scenario described, Stella would have observed changes in the appearance and detail of the cells as she transitioned through the three levels of magnification. At the first level, using the scanning objective, she would merely have seen a section composed of scores of individual cells packed closely together. As she moved on to the low-power objective, individual cells became more well-defined.
It's at this stage that Stella might start to recognize cell structures within the Paramecium. For instance, she might see the pellicle, a layer that gives the cell form and structure. Finally, switching to the high-power objective would allow Stella to envision even the minutest details within the cells. Crucially, she would notice that most of the cells are in the interphase period of the cell cycle.
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People infected with the human immunodeficiency virus (HIV) have an increased
risk of dying from secondary infections. Which of these best explains how HIV
increases the danger of secondary infection?
A HIV produces antigens that damage red blood cells
B HIV adds genetic material from harmful microbes.
C HIV destroys helper T cells
D HIV consumes beneficial microbes in the body
what is the nitrogen cycle
Answer:
The nitrogen cycle describes how nitrogen moves between plants, animals, bacteria, the atmosphere, which is the air, and the soil in the ground.
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describe one piece of evidence that supports the big bang theory
Answer:
red-shift and cosmic microwave background (CMB) radiation). One of the main pieces of evidence for the big bang is the observed motion of galaxies: The light from distant galaxies is redshifted, which indicates that they are moving away from us.
Explanation:
The redshift of distant galaxies supports the Big Bang theory. This redshift indicates that galaxies are moving away from us, suggesting the universe is expanding as predicted by the Big Bang theory.
Explanation:One piece of evidence that supports the Big Bang theory is the redshift of distant galaxies. This redshift is caused by the Doppler Effect, which is a change in the frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. In the context of the Big Bang theory, the redshift observed in light from distant galaxies indicates that those galaxies are moving away from us and that the universe is expanding, with distances between galaxies increasing over time. This is consistent with the Big Bang's prediction of an expanding universe beginning from a very high density and high-temperature state.
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Which statement best explains the impact of favorable oceanic conditions on the Geosphere?
A Hurricanes change the shape of the coastline.
B Intertidal areas support many types of life.
C Ocean waves add more sand to beaches.
D Pollution moves onshore from oceans.
Final answer:
The statement that best explains the impact of favorable oceanic conditions on the Geosphere is that intertidal areas support a diverse range of life due to their variable environment and adaptations of organisms to both terrestrial and marine conditions.
Explanation:
Which statement best explains the impact of favorable oceanic conditions on the Geosphere? The most fitting answer is that intertidal areas support many types of life. The intertidal zone, the area between high and low tide, is a vital part of the marine biome where organisms are repeatedly exposed to varying conditions such as air, sunlight, and waves. These life forms are highly adapted to this environment, being able to withstand dry periods and the physical impact of waves. Moreover, the movement of the waves contributes to the shifting of sand and the shape of the coastline, thereby supporting a unique and diverse ecosystem.
Additionally, the neritic zone is another part of the ocean that extends from the intertidal zone to the depths of about 200 meters, where sunlight still penetrates. This zone is also rich in biodiversity, with conditions suitable for photosynthesis, and acts as the base for most of the world's fisheries.
Ocean waves transporting sand to beaches best exemplifies the impact of favorable oceanic conditions on the geosphere.
A) Hurricanes change the shape of the coastline.
- This statement refers to the hydrosphere, not the geosphere. Hurricanes can indeed cause erosion and alter coastlines, but they primarily affect the interaction between the atmosphere and the hydrosphere.
B) Intertidal areas support many types of life.
- This statement also primarily concerns the hydrosphere, specifically the coastal zones where the ocean meets the land. Intertidal areas support diverse ecosystems, but they are not directly related to the geosphere.
C) Ocean waves add more sand to beaches.
- This statement involves the interaction between the hydrosphere and the geosphere. Ocean waves can transport sediments, including sand, along coastlines, contributing to beach formation and changes in coastal geomorphology. This option is most closely related to the impact of oceanic conditions on the geosphere.
D) Pollution moves onshore from oceans.
- While pollution can indeed be carried by ocean currents and impact coastal areas, this statement primarily relates to the interaction between the hydrosphere and the biosphere or anthroposphere, rather than the geosphere.
Therefore, option C, "Ocean waves add more sand to beaches," best explains the impact of favorable oceanic conditions on the geosphere.
A planes velocity changes from 0 m/s to 60 m/s in 20 seconds. What is its
acceleration?
3 m/s2
3 m/s
0.3 m/s2
0.3 m/s
Answer:
Option A. 3 m/s2
Explanation:
Given data: Initial velocity = 0 m/s
Final velocity = 60 m/s
Time taken = 20 seconds
Required : acceleration = ?
Solution: We know that
Acceleration = final velocity - initial velocity / time taken
Acceleration = 60 m/s - 0m/s ÷ 20 s
Acceleration = 60 m/s ÷ 20 s
Acceleration = 3 m/s2
So the acceleration produce in the body is 3 meter / second square.
what structures are formed from rapidly cooling lava in the ocean?
Pillow lavas are sack-like structures formed from rapidly cooling lava in the ocean.
What is cooling lava in the ocean?Pillow lavas, sack-like structures formed when flows of basaltic lava are extruded into the ocean, a deep lake, or a water-filled tunnel within the ice, are seen on the steep slopes of volcanoes.
Pillow basalt commonly develops at mid-ocean ridge volcanoes or oceanic hot-spot volcanoes, like those that created the Hawaiian Islands. The most prevalent rock in the crust of the Earth is basalt, which also serves as the crust of all ocean basins.
Therefore, Pillow lavas structures formed when flows of basaltic lava in the ocean, which develop at mid-ocean ridge volcanoes.
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Does any one know the answer to this because I do not
Answer:
I think its Pioneer Species
Explanation:
Which of the following is true about plants and cellular energy?
A. Plants can use light energy to produce food molecules or to obtain cellular energy from the bonds of these food
molecules during photosynthesis.
B. Plants can use light energy to produce food molecules or to obtain cellular energy from the bonds of these food
molecules during cellular respiration.
C. Plants use light energy to produce food molecules during cellular respiration and to obtain cellular energy from the bonds
of these food molecules during photosynthesis.
D. Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of
these food molecules during cellular respiration.
Answer:
The correct statement is
Option D. Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
Explanation:
Photosynthesis is food producing process in which food is produced by plants in the presence of sunlight while respiration is energy releasing process in which energy is released due to the breakdown of glucose molecules.
Answer: D). Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of
these food molecules during cellular respiration.
Explanation: During photosynthesis, plants use light energy absorbed from the sun to manufacture organic food substances such as glucose in the presence of carbon dioxide and water to give oxygen as the byproducts but during cellular respiration, glucose produced in photosynthesis is broken down in the presence of oxygen (a byproduct of photosynthesis) to generate energy in form of ATP with the release of carbon dioxide and water as byproducts.
Equation for photosynthesis is 6CO2 + 6H2O + solar energy --> C6H12O6 + 6O2
Equation for cellular respiration is C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP
An invasive species has the same niche as the squirrel in the community
shown here.
rabbit
fern
o fox
squirrel
hawk
What would be a likely result of the invasive species joining this community?
O
A. A decline in competition for plant food sources
O
B. An increase in biodiversity throughout the community
O
C. A decline in the size of the native squirrel population
O
D. An increase in stability of the overall ecosystem
Answer:
A rabbit and a squirrel have the same niche as the squirrel.
A likely result of the invasive species joining would be A) decline in the size of the native squirrel population.
Explanation:
Select all that apply . What are the waste products of respiration ?
Co2
O2
H2O
(CH2O)n
Energy
ATP
Answer:
CO2 and H2O
Explanation:
A proton is added to an atom. All but one statement is true.
A) the atom becomes an isotope
B) the atom gains a positively-charged particle
C) the mass of the atom increases
D) the mass of the nucleus increases
Answer:
A) The atom becomes an isotope.
Explanation:
The atom does not become an isotope because the only way an atom becomes an isotope is when a neutron is added or subtracted and in this case a proton not a neutron is added.
I hope this helps!!!
What is the structure and function of the cell membrane? Why is the cell membrane so important?
Answer:
The cell membrane is a multifaceted membrane that envelopes a cell's cytoplasm. It protects the integrity of the cell along with supporting the cell and helping to maintain the cell's shape. Proteins and lipids are the major components of the cell membrane.
Answer:
The cell membrane has two functions: first is to keep the constituents of the cell in and unwanted substances out. Its second function is to be a gate allowing the transport of essential nutrients into the cell and movement from the cell of waste products. It's important because it protects the cell.
Reproduction would not occur if which part of a cell was removed?
Answer:
Reproduction would not occur if the genetic part of a cell were removed. Genetic material must be transferred for reproduction to occur. In other words, this is the DNA of the cell.
Reproduction would not occur if the reproductive cells or "gametes" (such as sperm or eggs) were removed.
What are gametes?Gametes are reproductive cells that are responsible for sexual reproduction. They are cells that carry half of the genetic information of an organism, which is necessary to produce a new organism. In humans and most animals, there are two types of gametes: sperm and eggs.
Sperm are produced in the male reproductive system and carry one copy of each chromosome. Eggs, on the other hand, are produced in the female reproductive system and also carry one copy of each chromosome. When sperm and egg cells meet, they fuse and form a new cell called a zygote, which contains all the genetic information necessary to form a new organism.
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Which words identify the scientific parts of a wave
Answer:
Crest
Trough
Rarefaction
Compression
Amplitude
I think this may help if this is what you were looking for as an answer...