Answer: smokers are 15 to 30 times more able to get cancer than non smokers
The frequencies of a color trait among rabbits living in a
mountainous area have changed over time. What type of
selection most likely occurred?
a. directional
b. disruptive
c. stabilizing
d. sexual
If a sample of DNA contains 20% C nucleotides, what percent of G nucleotides would there be. Explain
Answer:
The perecentage of guanine is 30%
Explanation:
the DNA from any cell of all organisms should have a 1:1 ratio (base Pair Rule) of purine bases [for the DNA cytosine, thymine and for the RNA uracil] and pyrimidine bases [guanine and adenine for RNA and DNA]. The amount of guanine should be equaled to cytosine and the amount of adenine should be equaled to thymine. You can follow this rule in both strands of the DNA.
Answer:
The perecentage of guanine is 30%
Explanation:
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What do we call the parameters of the are of a population when we are organizing the biosphere
Answer: I think it’s A
Explanation:
what organelle is found in the plant cells. the function of the organelle is to collect solar energy and use this to produce food, or glucose, for the plant.
Answer:
~chloroplasts~
Explanation:
Answer:
chloroplasts
Explanation:
Chloroplasts are organelles that conduct photosynthesis in plant cells, where the photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in plant and algal cells.
summarize the differences between early succession, mid-succession, and late succession.
Answer:
In primary succession newly exposed or newly formed rock is colonized by living things for the first time. and in secondary succession an area that was previously occupied by living things.
Explanation:
Due to incursions of r strategists, there is a rapid increase in diversity in early succession. If a few k strategists dominate the landscape in late succession, biodiversity may begin to decline. Mid succession has the greatest diversity. When secondary succession begins, species diversity decreases.
What is succession?In biology, succession refers to the order in which plants and animals inhabit a biological community. As one group of plants and animals dies, another group of plants and animals emerges.
Early succession is becoming more diverse as a result of r strategist incursions. In late succession, if a few k strategists dominate the landscape, biodiversity may begin to decline.
Mid succession has the most variety. Species diversity decreases when secondary succession begins.
Early successional habitat was defined as areas with vegetation heights less than 3 meters, mid successional habitat as areas with vegetation heights between 3 and 16 meters, and late successional habitat as areas with vegetation heights greater than 16 meters.
Thus, this can be the primary difference between early succession, mid-succession, and late succession.
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What causes asteroids, meteoroids, and comets to orbit the Sun?
A.
electromagnetic attraction
B.
gamma radiation
C.
gravity
D.
heat
The diagram below shows a side view of several layers of rock below
Earth's surface. Which rock layer provides the best long-term storage
of groundwater?
Select one:
Layer III
Layer II
Layer I
Layer IV
Answer:
layer III
Explanation:
high porosity and low permeability provides the best long-term storage
Layer III, with high porosity and low permeability, provides the best conditions for long-term storage of groundwater, offering ample pore space while restricting rapid water movement.
The best long-term storage of groundwater is facilitated by rock layers with high porosity and low permeability. Porosity refers to the ability of a rock to hold water in its pores, while permeability is the ease with which water can flow through the rock. For effective storage of groundwater, it is essential that the rock layer can retain water within its pore spaces, preventing rapid drainage or flow.
In this context, Layer III, characterized by high porosity but low permeability, provides an ideal combination for groundwater storage. High porosity means there are ample pore spaces within the rock, allowing it to hold a significant amount of water. However, the low permeability of the rock restricts the movement of water, preventing it from quickly escaping or draining away. This characteristic of Layer III ensures that groundwater is retained within the rock over an extended period, serving as a reliable and sustainable storage reservoir.
On the other hand, Layer I, with both high porosity and high permeability, might allow water to move too freely, limiting its long-term storage capacity. Layers II and IV, with either low porosity or low permeability, are less suitable for efficient groundwater storage.
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Hairy stems (H) are dominant in tomato plants. Hairless stems (h) are
present in tomato plants that are homozygous recessive for this trait.
What percent of tomato plant offspring will have hairy stems if a
homozygous hairy plant is crossed with a heterozygous hairy plant?
If a homozygous hairy plant (HH) is crossed with a heterozygous hairy plant (Hh), all of the offspring will be heterozygous hairy (Hh). This means that 100% of the tomato plant offspring will have hairy stems.
What are homozygous and heterozygous traits?In genetics, the term "homozygous" refers to an individual that has two copies of the same allele for a particular trait. For example, if an individual has two copies of the allele for brown eyes (BB), they are homozygous for the trait of eye color.
On the other hand, the term "heterozygous" refers to an individual that has two different alleles for a particular trait. For example, if an individual has one allele for brown eyes (B) and one allele for blue eyes (b), they are heterozygous for the trait of eye color.
An individual's genotype, or the specific alleles they possess, can determine their phenotype, or the physical characteristics that they exhibit. For example, an individual with a genotype of BB (homozygous for brown eyes) would exhibit the phenotype of brown eyes, while an individual with a genotype of Bb (heterozygous for eye color) might exhibit either brown eyes or blue eyes, depending on the dominance of the alleles they possess.
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Final answer:
When a homozygous hairy tomato plant is crossed with a heterozygous hairy plant, 100% of the offspring will have hairy stems, due to the dominance of the hairy allele.
Explanation:
The question asks: What percent of tomato plant offspring will have hairy stems if a homozygous hairy plant is crossed with a heterozygous hairy plant? Given that hairy stems (H) are dominant over hairless stems (h), the crossing can be denoted as HH (homozygous hairy) x Hh (heterozygous hairy).
HH (homozygous parent) can only pass on an H allele.Hh (heterozygous parent) can pass on either an H or h allele.This results in the following possible genotypes for their offspring: HH or Hh. Since both HH (homozygous dominant) and Hh (heterozygous) plants will have hairy stems due to the dominance of the H allele, 100% of the offspring will exhibit hairy stems.
Using the model, describe the structure of DNA in terms of nucleotides, covalent bonds, sugars, phosphates, bases, and hydrogen bonds
Explain the importance of the hydrogen bonds to the function of a DNA molecule.
Answer:
DNA has a double-helix structure because hydrogen bonds hold together the base pairs in the middle. Without hydrogen bonds, DNA would have to exist as a different structure. he major function of DNA is to encode the sequence of amino acid residues in proteins, using the genetic code.
Explanation:
The importance of the hydrogen bonds to the function of a DNA molecule as it holds the complementary strands and is responsible for its structure.
Hydrogen bonds in DNADNA has a double-helix structure. It has two antiparallel strands. Both strands have a sequence of nitrogenous bases that are linked together by hydrogen bonds.
The hydrogen bond holds together the base pairs in the middle. Adenine is always bound with thymine and guanine to cytosine in DNA by hydrogen bonds. In absence of hydrogen bonds, DNA would have to exist as a different structure, not a double helix.
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The cell wall in plants functions to prevent the cell membrane from
breaking when too much water enters the cell. When too much water enters an animal cell, it is reasonable to predict that-
a.mitochondria will take up excess water.
b.the cell membrane will break.
c.the cell wall will break.
d.nothing will happen to the animal cell.
Answer:
b
Explanation:
When too much water enters an animal cell, the cell membrane will break.
What is cell membrane and cell wall?Inside a cell, the cell membrane helps to surround the cell organelles and cytoplasm. Ions can also go from the inside to the outside of the cell through the cell membrane.The cell membrane is protected by the cell wall, which is a tough, tough barrier.Cell wall is absent in animal cell.Plant cells' plasma membrane is surrounded by a cell wall that offers tensile strength and protection against mechanical and osmotic stress.It also enables cells to create turgor pressure, or the pressure exerted by the contents of the cell against the cell wall.Hence, the correct option is B.
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What performs photosynthesis in a food chain
Answer:
Autotrophs are the producers in the food chain, meaning they create their own nutrients and energy. Kelp, like most autotrophs, creates energy through a process called photosynthesis.
Explanation:
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Answer:
plant perform photosynthesis inf food chain
Explanation:
What happens when an object has an equal amount of positive and negative charges?
Answer:
The object is considered to be neutral
Explanation:
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Which characteristic of water is used to distinguish between a freshwater biome and a marine biome?
A) type of life in the water
B) salinity of water
C) temperature of water
D) location of the water
Answer:
b
Explanation:
The salinity of water distinguishes between freshwater and marine biomes: freshwater having less than 1% salt and marine having higher salt concentration.
Explanation:The characteristic of water that is used to distinguish between a freshwater biome and a marine biome is B) salinity of water. Freshwater biomes, which consist of ponds and lakes, streams and rivers, and wetlands, have a salt concentration of less than 1%. On the other hand, marine biomes, which include oceans, coral reefs, and estuaries, have higher salt concentrations. These differences in salinity are crucial because the organisms adapted to live in these environments have different tolerances for salt levels, influencing the types of life forms found in each biome.
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Match each of Earth's spheres with the correct description.
hydrosphere
all of Earth's living things
atmosphere
air surrounding Earth
geosphere
Earth's interior, rocks, minerals, and
landforms
biosphere
oceans, lakes, glaciers, rivers, streams, and
groundwater
The hydrosphere encompasses all the Earth's water, the atmosphere is the layer of air surrounding Earth, the geosphere includes Earth's interior and landforms, and the biosphere contains all living things that interact with other spheres.
Explanation:The hydrosphere includes all the water that is on Earth, encompassing freshwater sources such as rivers and lakes, saltwater in the oceans and estuaries, groundwater, and atmospheric water vapor. Ice in forms like glaciers also falls under the hydrosphere category, and it is critical for many aspects of life and climate regulation.
Surrounding the Earth is the atmosphere, a layer of gases that are essential for life, providing breathable air and protecting us from harmful radiation from the sun. The atmosphere influences weather and climate and is where clouds form, containing partly the water vapor component of the hydrosphere.
The geosphere refers to Earth's interior, which includes rocks and minerals, landforms, and the sea floor. This sphere is the solid foundation of our planet, where plants and animals reside, and it interacts with the other spheres to drive the planet's processes.
The biosphere represents all the living things on Earth and can be found interacting within the lithosphere (land), hydrosphere (water), and atmosphere (air). This includes land plants and animals, freshwater and marine organisms, birds, bacteria, and fungi among others.
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How does granite relate to continental crust?
All granite can only be found in really old continental crust.
All continental crust is made of granite.
Granite cannot be found oceanic crust.
Granite can be mined in continental crust.
Answer: All continental crust is made of granite.
Explanation:
The earth consists of multiple layers and the lighter particles are found on the upper surface and the heavier particles tend to settle in the base of the earth.
The continental crust is layer of earth which is composed of igneous, metamorphic and sedimentary rocks they usually forms the continents and the areas of the shallow seabed.
This area is base and usually consists of the heavier particles which is usually made of granite. It also contains volcanic lava and rock called basalt. Basalt and granite are heavier particles so they make continental crust.
Emily is developing a computer model of protist populations in certain areas of the ocean, and how they help maintain homeostasis in ecosystems. Photosynthetic protists play essential roles in the environment, especially in oceans and lakes. If a hypothetical catastrophic event drastically reduced the population of zooxanthellae, a photosynthetic protist with a specific habitat, which statement describes the most likely result?
A drastic reduction in the population of the photosynthetic protist zooxanthellae would likely lead to severe disruptions to the ecosystem, including coral bleaching, decreased biodiversity, and a reduction in the quantity of photosynthesis, which would directly affect food chains.
Explanation:If a hypothetical catastrophic event drastically reduced the population of zooxanthellae, a photosynthetic protist, the most likely result would be a major disruption to its specific ecosystem. Zooxanthellae are symbiotic with coral polyps, providing them with essential nutrients derived from photosynthesis. In return, the coral provides the protist with a protected environment and the compounds necessary for photosynthesis. This symbiosis is particularly critical in nutrient-poor oceanic environments, with zooxanthellae enabling corals to secrete the calcium carbonate skeletons that form reefs.
Consequently, a major population reduction of zooxanthellae could lead to a phenomenon known as coral bleaching, where corals lose their algal pigments and eventually die. This loss would have significant implications for the entire reef ecosystem. Coral reefs, for example, provide shelter and food to a wide variety of marine organisms; therefore, their destruction would negatively impact biodiversity and the stability of oceanic ecosystems.
Moreover, since photosynthetic protists like zooxanthellae are important primary producers, their drastic reduction could significantly diminish the amount of photosynthesis in oceanic ecosystems. This effect on photosynthesis would mean less carbon fixation, which could impact food chains and the availability of organic molecules necessary for life, especially for those species that directly consume protists.
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Identify the consumers in the food chain.
Letter __ represents the primary consumer.
Letter __ represents the tertiary consumer.
Answer:
b and d
Explanation:
In the food chain, consumers are organisms that feed on other organisms. Primary consumers, like rabbits, eat producers such as plants whereas tertiary consumers, such as eagles, eat secondary consumers. The letters assigned to these consumers would depend on their placement in an example food chain.
In a food chain, consumers are organisms that eat other organisms. The primary consumer is at the second level of the food chain, and they predominantly eat producers, such as plants and algae. For example, rabbits eating grass. Corresponding to the letters, if grass is represented by a letter A and rabbits by B, then letter B would represent the primary consumer. The tertiary consumer is usually at the fourth level of the food chain, they are typically carnivores that eat secondary consumers. For instance, if we have snakes that eat rabbits and eagles that eat snakes, the eagle would be the tertiary consumer. Hence, if eagles are represented by the letter D, then that letter D would represent the tertiary consumer.
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The wind blows the windmill. The windmill pumps water. Which type of energy does the windmill use?
A.
solar
B.
water
C.
nonrenewable
D.
renewable
Answer:
D) renewable
Explanation
This is because the windmills use wind to produce energy or pump water. Because wind is a source of energy which is non-polluting and renewable and doesnt use any types of fossel fuel to run. This way it works without producing toxic waste or radioactive or greenhouse gases.
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The windmill uses renewable energy, which comes from wind power, an indirect form of solar energy that can replenish itself and hence is sustainable.
Explanation:The wind blows the windmill, and the windmill pumps water. The type of energy the windmill uses is renewable.
Wind energy is derived from the motion of air or water, which turns a turbine. This process is an indirect means of harnessing solar energy, as winds are produced by the uneven heating of air masses. Since the supply of wind is continuously renewed by the Earth's atmospheric processes, powered by the sun, wind power is considered a renewable resource.
In contrast, non-renewable energy sources such as nuclear energy, oil, coal, and natural gas cannot replenish themselves within a human timescale and will eventually be depleted.
Given the information available and understanding that renewable resources can be used indefinitely, the answer to the question would be D. renewable.
5. What is the best-known feature of sedimentary
rocks?
Bedding. Bedding is often the most obvious feature of a sedimentary rock and consists of lines called bedding planes, which mark the boundaries of different layers of sediment. Most sediments were deposited along a flat surface that was roughly parallel with the depositional surface.
What is the difference in trophic level efficiency between herbivores and carnivores?
Answer:
carnivore wat meat herbivore just eat plants but
Explanation:
basically eating each other almost
What are the 3 main ocean zones?
Answer:
The oceanic zone is subdivided into the epipelagic, mesopelagic, and bathypelagic zones on the basis of amount of light that reaches different depths.
Describe (in complete sentences) and give at least 3 examples of pioneer species. *
Answer:
Plankons, fungi, bacteria, lichens etc. are the pioneer species of ecological succession. Pioneer species are hardy species which are the first to colonize previously biodiverse steady-state ecosystems. Some lichens grow on rocks without soil, so may be among the first form of life the example includes bacteria, fungi, and lichens.
Explanation:
What are three parts that create an amino acid
Answer:
The three parts of an amino acid are the carboxyl group, the amino group, and the central carbon that contains the R group.
Explanation:
The following steps describe how sedimentary rock forms at the bottom of a river. Which two steps involve erosion?
1. A large rock breaks down into sediment.
2. The water transports and deposits the sediments.
3. The water also transports calcite and clay, which glue the sediments together.
4. The upper layers of deposits put pressure on the lower layers.
5. Rock forms as the layers of sediment and glue compact and cement together.
A large rock breaks down into sediment (Erosion), The water transports and deposits the sediments (Erosion)
What is sediment?Sediment is a general term that refers to any material which is present in a loose, unconsolidated form and is made up of particles of rock or mineral fragments. It is typically found in rivers, lakes, seas, and oceans, and can range from silt and sand, to gravel and pebbles, clay, and even organic material like bones and shells. Sediment can be created by weathering, erosion, and transport of materials from their source. It can also form through chemical precipitation and biogenic processes. Sediment is important in the environment as it helps to protect the aquatic species by providing a safe habitat, and it is also used as a reservoir for nutrients that can be used by other organisms.
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Final answer:
The two steps that involve erosion are when 1. A large rock breaks down into sediment and when 2. The water transports and deposits the sediments. Erosion encompasses both the breakdown and transportation processes.
Explanation:
The two steps that involve erosion in the formation of sedimentary rock at the bottom of a river are:
A large rock breaks down into sediment. This is the initial stage where physical or chemical weathering breaks down the rock into smaller particles.The water transports and deposits the sediments. During transportation, the particles are eroded further as they are carried by the water flow to new locations where they will eventually be deposited.Erosion is essentially the process where materials are broken down and then transported from their original location. Sediments transported by water, wind, or glacial ice are examples of erosion at work, whereas deposition occurs when these sediments are laid down in new environments, such as the bottom of a river.
This trophies pyramid shows the different types of organisms in an ecosystem. Why do you think a pyramid shape is used to show this categorization?
Where are the strongest jet streams
Answer: The strongest jet streams are the polar jets. The Northern Hemisphere and the Southern Hemisphere each have a polar jet and a subtropical jet.
Explanation:
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According to the Universal Law of Gravitation, every object attracts every other object in the universe. Why can't you feel the force of attraction between you and Mars?
There is no force of attraction between you and mars
Answer: D.
Mars is a long distance away.
Explanation: plato
We use many types of natural resources for energy. Identify each type of natural resource as renewable or nonrenewable.
sunlight
oil
natural gas
wind
coal
water
Renewable
Non-renewable
Edmentum. All rights reserved.
Renewable Energy: Sunlight, water, wind
Non-renewable Energy: Coal, oil, natural gas
Explanation: Nonrenewable sources of energy are rapidly being depleted and take a long time to replenish. Coal, oil, and natural gas are nonrenewable sources of energy. Renewable sources of energy replenish relatively quickly and are available in abundance. The wind, sunlight, and water are renewable sources of energy.
Natural resources can be renewable or nonrenewable based on their availability. Sunlight, water, and wind are renewable, while coal, oil, and natural gas are nonrenewable resources.
What are renewable and nonrenewable resources?Renewable resources are the flow sources that are not limited in number and are replenishable when consumed or used. They get replaced through natural products and are in finite amounts.
Nonrenewable resources on the opposite are limited and do not get replenished easily, and take years to form. For example, coal, oil, and natural gas are limited and are not easily replaced.
On the other hand, sunlight, water, and wind are renewable resources that are available in abundant amounts in nature and get replaced through the natural cycles.
Therefore, sunlight, water, and wind are renewable resources.
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Birds are endotherms. Which statement accurately describes what this means? Birds feed and protect their young after they hatch. Birds have two different types of feathers. Birds can maintain a consistent body temperature. Birds have internal fertilization and lay eggs.
Answer:
c
Explanation:
Birds are endotherms, so the statement accurately describes that birds can maintain a consistent body temperature, which is the third option, as endotherms maintain a consistent body temperature.
What is the significance of the bird being endothermic?Birds are endothermic, which means they can maintain their body temperature without being affected by the external effects of the climate, and as they require a large amount of energy for flying, this allows them to generate the necessary heat to power their flight muscles. Maintaining a constant internal body temperature is necessary for many physiological processes such as digestion, respiration, hemostasis, etc.
Hence, birds are endotherms, so the statement accurately describes that birds can maintain a consistent body temperature, which is the third option, as endotherms maintain a consistent body temperature.
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Question 14(Multiple Choice Worth 4 points)
(02.02 LC)
Which of these serves as a reference for comparison during a scientific investigation?
Outcome variable (dependent variable)
Test variable (independent variable)
Control group
Hypothesis
Answer:
control group
Explanation: