According to Darwin’s On the Origin of Species, what four factors affect evolution? Explain how each factor affects evolution.
The 4 factors affect evolution, according to Darwin’s Origin of Species are;
Variation
Heritability
Competition
Differential survival
Variation ensures that there is variability of population traits on which selection pressures will apply.
Heritability means that the traits must be able to be passed down to offsprings through gametes.
Competition occurs when the individuals in the population compete for limited resources
Differential survival occurs due to competition for resources and other selection pressures. This result to the survival of the strongest and weeding out of the weak from the population.
if a tall stem is dominant characteristic in which case is the charistic of tall definitely expressed
Amoebic dysentery is caused by a parasitic amoeba. It reproduces in the _____.
spleen
liver
intestine
lungs
Both a grizzly bear and a slime mold are made of one or more cells that contain a nucleus and other organelles. What can you conclude they have in common, based on the concept of domains?
Answers.
hey are both in the domain Archaea.
They are both in the domain Bacteria.
They are both in the domain Eukarya.
They are both in the domain Animalia.
They are both in the domain Eukarya.
which characteristic can be inherited
A) long toes
B) short temper
C) sense of humor
D) acting ability
Long toes can be inherited from parents to offspring in organisms, considers a heritable trait, hence option A is correct.
What is a heritable trait?A heritable trait is a kind of offspring trait that matches the parents' related trait more than it fits the same trait in a random individual in the population.
It is a measurement of how well differences in people's genes describe differences in their traits. Sense of humor is not a heritable trait, it is a psychological condition that is different in parents and offspring.
A gene is key to the transmission of traits from parents to offspring, it is a DNA sequence that is expressed in the form of protein.
Therefore, the long toe is a character which can be inherited from parents, hence option A is correct.
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Wetlands have many benefits, including recreational opportunities, fish, and improving water quality.
Answer:
Correct. Wetlands create a nursery for many types of fish, and also improve water quality by removing nitrogen phosphorus and pesticides from agricultural runoff.
most water vapor in the atmospher is the source of
a. couds and rain.
b. pollution
c. carbon dioxide
d. wind.
FILL IN THE BLANK
A particular species of salamander was observed in California. Some groups of salamanders moved to the east, and a few others moved to the west. Over time, the two evolved and were no longer able to mate. This incompatibility was caused by (A. allopatric speciation, B. convergent evolution, C. coevolution) . The salamanders developed different reproductive behaviors, and the species were (A. mechanically isolate, B. behaviorally isolated, C. temporally isolated) .
Answer : The correct answer is -
1) A. allopatric speciation.
2)B. behaviorally isolated.
Allopatric speciation can be described as formation of new species when a biological population belonging to one species becomes geographically isolated and no gene flow occurs between the two during the course of evolution.
As per the given information in the question, a group of salamander population moved to east and another to west, which later evolved into two different population as they were unable to mate.
Thue, it represents allopatric speciation.
As the salamanders developed different reproductive behaviors, therefore it indicates behavior isolation, suggesting that they will perform different mating rituals.
what are human causes of sinkholes
which process is directly responsible for the trails of a comet facing away from the sun
A. Solar Wind
B. Gravitational effects of nearby planets
C. The comets rotation
D. Heating by the sun
Answer: The correct answer is D. Heating by the sun.
Comets are balls composed of dust and ice orbiting around the Sun in elliptical orbits. The orbit of the comet takes it near and far away from the sun. As the comets get closer to the Sun, the heat of the sun vaporizes the materials on the surface of the comet which forms a tail pointing away from the sun.
A comet tail is visible from Earth when they are illuminated by the Sun on approaching the inner Solar System. The solar radiations vaporize the volatile materials of the comet which streams out from the nucleus and carries dust away with it. The pressure due to the Sun’s radiation and solar winds leads to the formation of a tail pointing away from the Sun.
the process of _____ results in the formation of sex cells
What are seismic waves? What is their relationship to earthquakes?
Seismic waves are vibrations that travel through the Earth's interior or along its surface. They are directly related to earthquakes and provide valuable information about their characteristics. P-waves, S-waves, and surface waves are the main types of seismic waves.
Explanation:Seismic waves are vibrations that travel through the Earth's interior or along its surface. There are three main types of seismic waves: P-waves, S-waves, and surface waves. P-waves are primary or compressional waves that involve oscillations in the same direction as the wave is traveling. S-waves are secondary or shear waves that involve oscillations perpendicular to the direction of motion. Surface waves travel along the Earth's surface and cause the most damage during an earthquake.
Seismic waves are directly related to earthquakes. When an earthquake occurs, it releases energy in the form of seismic waves that radiate outwards from the earthquake's focus. These waves cause the ground to shake and can be detected by seismographs. By studying seismic waves, scientists can determine the location, depth, and magnitude of an earthquake, as well as its potential impact.
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Which is not a method used in genetic engineering?
A gene is inserted to remove mutated DNA.
A gene is removed.
A gene is inserted to make a mutation inactive.
A synthetic gene is created
Answer:
A synthetic gene is created.
Explanation:
I just took the test and this was the correct answer.
Why do clouds tend to form at 3pm and 6am
Clouds often form around 3pm and 6am because of specific atmospheric conditions. In the afternoon, the Sun's heat causes warm moist air to rise and cool, forming cumulus clouds. Around dawn, surface temperatures drop, creating a favorable environment for the humidity to condense into clouds.
Explanation:The phenomena of clouds often forming around 3pm or 6am primarily relate to atmospheric conditions particularly those involving temperature and convection processes.
In the afternoon, around 3pm, the sun has been heating the Earth's surface for most of the day. This heating process causes the air near the surface to warm up and rise, a process called convection. As this warm, moist air rises, it cools and can condense to form cumulus clouds, often appearing around the middle of the afternoon.
Similarly, around 6am, atmospheric conditions become favorable for cloud formation. The temperature near the Earth's surface becomes cooler than the air above. This causes the humidity to rise and condenses into clouds facilitated by the cooler, moist environment, which is why you often observe clouds in the early morning.
Another factor that contributes to these timings is the Earth's atmosphere's refractive properties, which can bend light around the planet. This bending can lead to the phenomenon of twilight illumination before sunrise and after sunset. Despite the sun not being in the horizon, its sunlight can still reach and heat the Earth's surface, possibly impacting cloud formation times.
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Which structure of a protein is the folding of the protein chain?
primary
secondary
tertiary
quaternary
The secondary structure begins the folding up process where as in the tertiary structure, the protein is folded into its accurate 3D structure, associating to the purpose. This is tied together by a series of non-covalent communications between side groups, including ionic communications, disulphide bonds, hydrophobic interactions, Van der Waals energies and hydrogen bonds.
Which statement is true about the cell theory?
It is tested only once.
It is based on a random guess.
It is based on experimentation.
It is a claim posed by some scientists.
The statement is true about the cell theory is It is based on experimentation. So, option C is correct.
What is cell theory?The cell theory suggest that all cells come from other cell. The other cell refers to the pre-existing cell.
Robert Hooke was the one who discovered many fact about cells. He studied the cells scientifically which we call cell biology.
So, option C is correct.
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During protein synthesis which part of RNA is joined together to form a sequence for a functional protein? Exons, introns, both exons neither exons or introns
In what pattern does the flow of energy in the ecosystem take place
what are some different species with Central brain
Aluminum (Al) has an atomic number of 13 and an atomic mass of 27. Which of the following correctly shows the electron arrangement for aluminum?
1. 2, 11
2. 2, 8, 1
3. 2, 8, 3
4. 2, 8, 17
How was the european rabbits transported to its new ecosystem? (australia) Was it intentionally transported, and if so, for what reason?
A newborn foal stands up to nurse from its mother. Is this an example of an innate or learned behavior?
A. innate
B. learned
What is a Nor'easter?
Which of the following are basic needs for animals?
A. food, water, sunlight, space, and shelter
B. food, water, oxygen, space, and shelter
C. water, oxygen, space, shelter and relaxation
D. shelter, water, food and protection
The basic needs for animals are food, water, oxygen, space, and shelter.
What are basic needs of living organisms?Basic needs refers to those things which must be present for an organism to survive.
If the basic needs of an organism are not provided, the organism will die.
The basic needs of an organism include, water, good and shelter.
Therefore, the basic needs for animals are food, water, oxygen, space, and shelter.
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Scientific bias can be present in any experiment. What is one effective method for reducing bias?
Answer:
The correct answer would be- Using random people to code the data of samples for scientific research or experiment.
Explanation:
Scientific bias is a scientific error that is taking place from unfair sampling or influence the research to portray a certain result or can occur due to an unfair estimation process that will affect the result of the research in a certain way according to the influence.
Scientific bias can be avoided by different methods to try to regulate to avoid bias with qualitative data analysis and one effective technique is -
- Using random people or researchers to code the data of samples for scientific research or experiment.
Why would water stop soaking into the ground in the saturated zone?
Water would stop soaking into the ground in the saturated zone from the previous rainfall cannot be re-absorbed. The rainfall become surface runoff.
Surface runoff is nothing more than the normal water running off on the land surface. It it similar to the water which we use for the purpose of washing the car with runs off down the driveway as we work, the rain which nature covers the landscape with runs off the downhill, too due to the gravitational force. Runoff is an important component of the natural water cycle of the ecosystem.
Surface runoff is the water, from the rain, snowmelt, or other sources, which flows over the land surface, and it is a major component of the water cycle in the ecosystem.
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in sexual reproduction, how do the offspring compare to the parent
which is one of the disadvantages of using fossil fuels as an energy resource? (a) burning fossil fuels produces radioactive wastes. (b) gases released during combustion can form acid rain. (c) the heat released during combustion can be used to produce electricity. (d) fossil fuels produce a tremendous amount of energy thst is difficult to contain.
Answer:
It's B
Explanation:
Fossil fuels formed from the remains of living things or organic matter. When tremendous pressure and heat are applied to organic matter for long periods of time, the organic matter turns into fossil fuels causes the pressure that turns organic matter into fossil fuels.
Final answer:
The correct option is (b) gases released during combustion can form acid rain. Burning fossil fuels releases gases that can lead to the formation of acid rain, representing one of the disadvantages of using fossil fuels as an energy resource.
Explanation:
One of the disadvantages of using fossil fuels as an energy resource is that gases released during combustion can form acid rain. Fossil fuels, which include coal, oil, and natural gas, are nonrenewable sources of energy that were formed from the remains of plants and animals that lived millions of years ago. When these fuels are burned, they release carbon dioxide and other pollutants into the atmosphere. These emissions contribute to environmental issues such as global warming, smog, and acid rain, which are caused by the release of sulfur dioxide and nitrogen oxides during the combustion process. Accidents during fossil fuel extraction and transportation can also lead to devastating environmental consequences, such as oil spills.
Any ideas for writing a paragraph on a voyage through an animal cell?
what type of energy is associated with food? how is that energy stored? how does food energy change when it is used to do work
Food substances contain chemical energy which is found between the molecular bonds of the food substance. When food is cooked the chemical energy is converted to another form of chemical energy by the separation of the different classes of food stored in the food as chemical energy.
The food ( carbohydrates ) when digested will be converted to glucose or fat molecules, which is required by the human body for proper functioning/energy.
Hence we can conclude that the type of energy associated with food is ; chemical energy, the energy is stored as Molecular bonds and the chemical energy in the food when cooked is converted to nutrients needed by the body ( e.g. glucose )
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