Answer:
Mutations are errors in genetic information and code that cause physical and functional alterations in living organisms. Some of them may be beneficial, harmful, or not produce significant alterations (neutral).
Explanation:
When categorizing each mutation as beneficial, harmful, or neutral, it's observed that:
A mutation in the HBB gene, which codes for hemoglobin, produces red blood cells that are rigid and sickle-shaped and is harmful.
Sickle cell anemia is caused by the HBB gene mutation, producing crescent-shaped cells, or "YES", which are not functional and very short-lived, causing hemolytic anemia. Deformity in red blood cells can cause blockage of small-caliber arteries, causing other symptoms other symptoms related to the disease.
A mutation in the EYCL3 gene, which helps regulate eye color, produces two different colored eyes, is neutral.
Under normal conditions, EYCL gene determine the color of the eyes. A mutation of this gene can cause the same individual to have a green and blue eye, which is not a serious health problem, but rather aesthetic.
A mutation in the CFTR gene, which codes for a cell transport protein, causes a buildup of a thick mucus that covers the organs, which represents a harmful mutation.
Cystic fibrosis, a disease caused by a mutation in the CFRT gene, produces the excessive thick mucous secretion that lines up the lungs and other organs - liver, pancreas, intestine - that characterizes this condition.This causes a functional alteration of the affected organ. It is also known as mucoviscidosis.
A mutation in the LRP5 gene, which codes for a cell membrane protein, increases bone density, which can be harmful, when it produces symptoms or beneficial.
Increased bone density is called osteopetrosis, and depends on the LRP5 -Low density lipoprotein receptor-related protein 5- gene mutation, that can cause bone pain in childhood and adolescence in just over half of patients, but represents an increase in bone resistance and reduces the risk of fractures.
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species which reproduce asexually lack genetic variety. why does genetic variety benefit a species
Answer:
It allows the species to be more adaptive in certain situations. For example: A husky has a fluffy fur coat for winter while a chihuahua is built with a short fur coat because it isn't around cool climates, but both are of the same dog species.
Genetic variation helps organisms to adapt to various envrionment changes and to be resistant to diseases.
What is genetic variation?Genetic variation refers to the differences which exist between organisms of similar species due to differences in their gene content.
Genetic variation is important to organisms as it helps them to adapt to various envrionment.
Genetic variation also protects organisms from disease.
Genetic variation also helps organisms to acquire unique abilities.
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Why is it necessary for the genetic material in a cell to exist in chromatin form during normal cellular activity, and not in chromosome form?
Answer/ Explanation:
Chromosomes are highly condensed and compact structures. This means the chromatin (protein plus DNA complex) is hierarchically organised into tight structures through progressive folding of chromatin.
However, this is only the case during cell division. When the cell is in interphase and performing its normal duties, it is in a much more decondensed structure. This is because in order for transcription to occur, the cell needs to be able to access the information in the DNA. For example, transcription factors need to bind at their gene promoters to promote transcription.
When the DNA is folded into chromosomes, cellular factors do not have access to the genetic information due to the physical constraints of the chromatin structure.
UIZ
Similarities Among Organisms
Reading Off
Which statement is accurate about the number of genes in different species of living things?
O The more complex a living thing the more chromosomes it is likely to have
The more complex a living thing the fewer chromosomes it is likely to have
O Amouse and a human have about the same number of genes.
O All living things have about the same number of genes.
Please help. I will give brainliest.
Answer:
The correct option is C) A mouse and a human have about the same number of genes.
Explanation:
The technique of genetic sequencing has enable us to learn and compare thee genomes of different organisms. Genome sequencing proves that the genome of the humans and mice are about 99 percent similar. The number of genes in the mouse genome and the genome of humans is almost equal.
Other options, like option A, cannot be true because many complex organisms have fewer chromosomes than other organisms. For example, there are many simple plants which have more number of chromosomes than the complex humans.
Which statement best describes the energy in this
system?
A.The potential energy in the system is greatest at X.
B.The kinetic energy in the system is greatest at X.
C.Total energy in the system decreases as the ball moves from X to Y.
D.Total energy in the system increases as the ball moves from X to Y.
Answer:
A-The potential energy in the system is greatest at X.
Explanation:
The potential energy in the system is greatest at X.
Answer:
A-The potential energy in the system is greatest at X.
explain
The potential energy in the system is greatest at X.
This satellite image shows a new housing development, which has caused forest fragmentation. Based on the image, if other new housing developments are built in nearby areas and the forest fragmentation continues, what will MOST LIKELY be harmed?
a. the animal population
b. the manufacturing industry
c. the human population
d. the agricultural industry
If new housing developments are built in nearby areas and the forest fragmentation continues, then the animal population will be harmed (Option A).
What is forest fragmentation?The expression 'forest fragmentation' makes reference to the removal of certain natural sectors in the forest that generate patches in these areas.
Forest fragmentation is generally caused by human activities and can be a serious problem for natural populations.In conclusion, if housing developments are built in nearby areas and the forest fragmentation continues, then the animal population will be harmed (Option A).
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Part of stratosphere contains a gas that blocks about 99% of the dangerous ultraviolet rays that reach the Earth from the Sun.
Image courtesy of the U.S. EPA
This portion of the stratosphere if known as the _______.
A.
tropopause
B.
mesosphere
C.
thermosphere
D.
ozone layer
Ozone layer is the correct answer
The Earth's rotation shapes the direction that wind blows. This is known as
the coriolis effect
convection
PER
FEDERABERLER
ERREFERENT
FEST
the doldrums
revolution
Explanation:
Coriolis effect is a kind of force that acts on a mass by using a inertial force.When earth rotates in its axis, the air that covers the earth also flows in a direction which is mainly caused by Coriolis effect.When the difference between pressure increases,wind flow becomes strong.This force acts at right angle of direction to pressure gradient force,which causes movement of wind in northern hemisphere and left in southern direction.During low pressure, the wind flows in a clock wise manner and during high pressure, it moves in anti clock wise manner.
How is the amount of daylight related to the sun’s apparent path?
Question 6(Multiple Choice Worth 2 points)
Which of the following is a common source of groundwater pollution?
Oil slicks
Erosion along riverbanks
Spraying crop fields with pesticides
Throwing used beverage containers into a lake
The common source of groundwater pollution is done by spraying crop fields with pesticides.
Answer: Option C
Explanation:
The ground water pollution is the mixing up of pollutant in the water which lies below the ground and is potable in nature. This pollution has the commonest source of pollutant by the pesticides.
The crop fields when sprayed for pests with pesticides in order to kill the pests on crop, contaminates the crop as well as the ground at the same time. These are its disadvantages.
The ground being contaminated on ploughing or by leaching gets the pollutant into the water table. Plant on the other hand on decaying leaves the pesticide into the ground which in turns goes into the under ground water.
Spraying crop fields with pesticides is the common source of groundwater pollution.
Explanation:
Groundwater is naturally found in aquifers or geological water structures which stores water deep in the ground.
The most common contaminant of groundwater is spillage and seepage of excessive chemicals from industries and agriculture.
Agriculture which is done in large scale in many parts of the world implies the use of a large number of chemicals in the form of pesticides, weedicides, fertilizers, growth promoters etc. these are either sprayed as foliage sprays or added to the ground directly for the roots to absorb.
The excess chemicals applied to enter the ground surface and mix with the surface water and enter into the ground and mix with the groundwater. Thus the entire natural aquifer in that area becomes easily contaminated with chemicals.
50 POINTS
Which form of government was often conquered because they did not have the resources to protect themselves?
A.
city-state
B.
theocracy
C.
monarchy
D.
dynasty
City-state government was often conquered because they did not have enough resources to protect themselves
Explanation:
A city-state government is an independent autonomic political system which usually compromises just a single independent city which is governed by itself with sovereignty over its territory. The city-states like Greece, Italy, and Rome etc became very powerful.
The main reason for these city-states being conquered more was the accumulation of wealth and aristocracy in such states.
Heavy taxes, religion, slavery also lead to social unrest and conflicts among these city-states which made them weaker. These internal conflicts also made them lose their resources and vulnerable to be conquered by other powerful empires.
With the increasing power of neighboring states, like in the case of Rome and Greece, the Romans became mightier than Greeks at one point and conquered the Greek city-states.
Examine the leaves of a palm tree.
Which statement most specifically describes a palm tree?
Palm trees are dicots.
Palm trees are monocots.
Palm trees are angiosperms.
Palm trees are flowering plants.
Answer:
b
Expla!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer: the correct answer is b.
Explanation: i don’t know how to explain it but i found it in my notes i wrote down
Remy is smoking too closely to a building that manufactures fertilizer. When he puts out his cigarette near the hazardous waste, it sparks a fire because the fertilizer is flammable. What kind of hazard did the chemical waste cause?
The chemical waste from the fertilizer manufacturing plant caused a fire hazard in this scenario.
Flammability: The fact that the chemical waste from the fertilizer manufacturing plant caught fire when Remy put out his cigarette indicates that the waste is flammable. Flammable materials are substances that can easily ignite and sustain combustion when exposed to a heat source or open flame.
Ignition Source: Remy's cigarette butt, acting as an ignition source, was sufficient to trigger a fire in the presence of the flammable chemical waste.
Fire Hazard: The term "fire hazard" refers to the potential for a fire to occur due to the presence of materials that can easily catch fire or support combustion. In this case, the chemical waste from the fertilizer plant posed a fire hazard, and its ignition led to a fire.
It's important to handle and dispose of flammable materials and chemical waste in a safe and regulated manner to prevent such incidents and minimize the risk of fires.
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Regardless of an object's position in space, its _______ remains constant.
mass
weight
Answer:
Mass
Explanation:
on usatestprep
Polar bears, when they are not hibernating, need an average of 2 kg of fat per day to obtain enough energy to survive. The polar bear's primary food source is seals and they prefer seal blubber over the rest of the animal. If the average seal provides 55 kg of blubber, how many days can the polar bear survive on one seal kill?
Answer:
27.5
Explanation:
In the natural carbon cycle, the ocean influences climate by controlling CO2 levels primarily through ________________ and _______________.
Answer:
In the natural carbon cycle, the ocean influences climate by controlling CO2 levels primarily through biological activity and massive geological events.
Explanation:
Carbon flows in an interchange across each reservoir called the carbon cycle, which has gradual and rapid components. Any cycle shift which moves carbon from one reservoir places more carbon in another reservoirs.Changes that bring carbon dioxide into the environment contribute to higher Earth temperatures.
The carbon cycle appears to keep the balance over the long term that prohibits all Earth's carbon from atmospheric entry or being deposited entirely in rocks. That equilibrium helps to keep the temperature on Earth fairly stable, just like a thermostat.
Why is the fossil named Ida so important to comparative anatomists?
Answer:
Fossils are usually named based on the following conditions-
the location in which they are found named after the scientist who discovers it the rock formation in which they are found They are given two names, the genus and the speciesThese fossils are again categorized into different groups depending on the similarity in terms of form.
These names of the fossils are important to the comparative anatomists because it helps them in doing the comparative study and understand the causes of similarities and dissimilarities in terms of anatomy and also helps in understanding the evolutionary process of these organisms. For example, the fossil named 'Ida' is the primitive fossil that was found to be almost completely preserved. This fossil helped in comparative studies with other fossil species in a number of ways.
Answer:
The fossil is the oldest human ancestor ever discovered. It’s also the most complete fossil primate ever found. Scientists can compare its skeletal structure to that of humans and other primates to find evolutionary similarities and differences. They can possibly find early evolutionary connections to other organisms too.
Explanation:
Sample answer
which of the following is a characteristic of our sun
The characteristic of Sun is about three times the size of Earth. Hence the correct option is c.
The characteristic of our Sun indicated in option C is that it is about three times the size of Earth. The Sun is a G-type main-sequence star, classified as a yellow dwarf. While it appears much larger and brighter than Earth, its diameter is approximately 109 times that of Earth, making it about 333,000 times more massive. The Sun plays a central role in our solar system, providing the gravitational force that keeps planets in orbit and the energy necessary for life on Earth through the process of nuclear fusion in its core. Understanding the Sun's size is fundamental in appreciating its significance and influence on the dynamics of our solar system.
In addition to its size and temperature, the Sun contains about 99.86% of the total mass of the solar system, with the majority of this mass concentrated in the form of hydrogen and helium. The Sun's gravitational influence governs the orbits and movements of the planets, moons, asteroids, and other celestial bodies within the solar system. Hence the correct option is c.
Complete question:
Which of the following is a characteristic of our Sun?
A. It is a red dwarf star.
B. Its temperature is 15 million degrees Celsius.
C. It is about three times the size of Earth.
D. It contains 10% of all the matter in the solar system...
Match each characteristic with the correct animal
Answer:
1 honeybee
2 scorpion
3 lizard
4 frog
5 ostrich
6 goldfish
7 bear
8 clam
Which process of cell division produces cells necessary for reproduction?
Answer:
meiosis
Explanation:meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.
The process of cell division for reproduction is meiosis, which results in four diverse gametes or sex cells with half the number of parent cell chromosomes.
Explanation:The process of cell division that produces cells necessary for reproduction is called meiosis. Unlike mitosis, which creates two identical cells, meiosis yields four genetically diverse cells, referred to as gametes or sex cells (sperms in males and eggs in females). These gametes contain half the number of chromosomes of the parent cell and combine during sexual reproduction to form a new organism.
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Which statement best describes the cycling of carbon between the atmosphere and hydrosphere?
A. Trees and plants releasing carbon through respiration
B. Volcanic activity releasing carbon into the atmosphere
C. Movement of gases from the ocean's surface by diffusion
D. Releasing of carbon into the soil when organisms decay
Answer:
D
Explanation:
it would be d as when organisms or plants die they would decay and the energy and nutrients and carbon would then be broken down and absorbed by the soil
The statement best describes the cycling of carbon between the atmosphere and hydrosphere is " Movement of gases from the ocean's surface by diffusion "
What is hydrosphere?A Hydrosphere is the total amount of water present on a planet.
A Hydrosphere include water in all form that is in solid, liquid and gas.
Example: Water present in lake, river ,ocean etc.
Water present in ice form on the earth.
Water present in vapor form.
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A cruise ship makes its way from one island to another. The ship is in motion compared with which reference point
Answer:
Light house
Explanation:
When a cruise ship makes its way from one island to another. The ship is in motion is always compared with the a light house on a near by island as it serves as a guiding hand and acts as a reference point for ships coming from different island.
what must occur during fertilization in humans in order to produce a male child
Answer:
The Dad must give a Y chromosome
Explanation:
To have a male child there must be an X and Y chromosome
Answer:
The Dad must give a Y chromosome
Explanation:
Global economic development has led to an increase in the use of fossil fuels. As a result, greenhouse gas emissions have also increased. To fight this problem, some governments require businesses to pay fines if they do not comply with strict environmental regulations. Which of the following could be a negative result of this solution?
A) Greenhouse gas emissions might decrease while fossil fuel use increases.
B) Businesses might invest in places that lack environmental regulations.
C) Greenhouse gas emissions might increase while fossil fuel use decreases.
D) Businesses might profit from complying with environmental regulations.
B) Businesses might invest in places that lack environmental regulations.
Explanation:
Certain gases in the atmosphere has the ability to trap the radiating heat from the earth and keep the atmosphere warm even during the night.These gases are called greenhouse gases.Carbon dioxide, methane etc are some example of green house gases. These gases are added to the atmosphere in large amounts due to burning of fossil fuel.Though green house gases are very important in maintaining the temperature of the Earth but if their percentage increases in the atmosphere then they may contribute to global warming.Global warming is a environmental havoc and is leading to global climate change and melting of ice caps.To manage this problem it is very necessary to reduce the increasing green house gases.To achieve this goal governments of various nation has formulated rules according to which, the industries that do not have efficient machinery to reduce consumption of fossil fuel and reduce green house gas emission are charged fines.But since these rules are not implemented in all places , the industries choose to establish business in those places where they are not forced to comply with strict environmental rules. So, there is a negative impact on the economy of the nation that have strict regulations to conserve environment.Answer: alt answer: there would be a financial incentive to protect the environment
Explanation:
Question: What is the effect of day length on plant
growth?
Hypothesis: Plants will grow more when the day is
longer
Describe the experiment you would use to test the
hypothesis. Be sure to include variables as well as
experimental and control groups.
Answer:
The experiment can be done as follows:
Some plants can be grown in conditions where they are given maximum amount of day light. Others might be kept in the day time for a period of few hours and then be places inside a room where no light can come. The plants which receive medium amount of light will be the control group of this experiment. In the end, the growth of the plants in the experimental group shall be compared with the control group to compare the results.
During cellular respiration, the bonds of food molecules are broken, so energy can be released to fuel other cellular processes. In order for this to occur, which of the following statements must be true?
A.
The new compounds that are formed must be more complex than the food molecules that were broken down.
B.
New compounds with lower-energy bonds must be formed when the high-energy bonds in food molecules are broken.
C.
New compounds with higher-energy bonds must be formed when the low-energy bonds in food molecules are broken.
D.
The energy in the new compounds that are formed must be equal to the energy in the bonds of the food molecules.
Answer:
Chemical potential energy is stored in glucose's carbohydrate bonds, and these bonds can be broken to fuel the production of ATP. Energy in ATP can then be used to perform cellular work.Explanation:
Letter:B
During cellular respiration, high-energy bonds in food molecules are broken to form new compounds with lower-energy bonds, like ATP. The energy released during this process powers various cell functions. The correct option is B.
Explanation:In the process of cellular respiration, the correct option is B: New compounds with lower-energy bonds must be formed when the high-energy bonds in food molecules are broken. This is because energy is released when high-energy bonds in glucose or other food molecules are broken during cellular respiration. The energy that is released is then used to synthesize ATP, a molecule with lower-energy bonds. ATP can then be used by the cell for energy-demanding processes. ATP serves as the 'energy currency' of the cell, providing a ready source of energy that powers numerous cellular functions.
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The diagram shows a food web.
Which is the producer?
O grass
o grasshopper
O mouse
fox
Shrew
Snake
Mouse
Grasshopper
Rabbit
Mark this and return
Save and Exit
Next
Submit
Answer:
grass
Explanation:
grass produces the main source of energy for the food chain
A producer is someone who creates and supplies goods or services. The plants and algae can make their own food using energy from the sun. Here grass is a producer. The correct option is A.
What is a food web?There exists unique interactions and relationships that are involved in the energy transportation. The energy once produced and captured is distributed through various living organisms. This transfer of energy is termed as the food web.
The food web explains how food chains overlap. Both the food chains and food webs shares three types of organisms in a food chain: producers, consumers and decomposers.
The organisms which can synthesize their own food and generally serve as the foundation for all food chains are called producers. Some of the examples of producers are plants, algae and bacteria. Here grass is a producer.
Thus the correct option is A.
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Select all that apply.
When determining the growth rate, you need to know
natality
mortality
population density
immigration rate
emigration rate
carrying capacity
Answer:
Natality
Mortality
Immigration Rate
Emigration Rate
Answer:
Natality(birth rate)
Mortality(death rate)
immigration rate(the rate of moving in a popul.)
Emigration rate(the rate of moving in a popul.)
Explanation:
Which statement best describes the crust?
Answer:
Outermost layer of the Earth
Explanation:
The crust is Earth's outermost layer, comprised of continental and oceanic types, with varying densities and compositions. It is the site of earthquakes due to its brittle nature and contains valuable mineral resources and fossil fuels.
The crust is the outermost layer of Earth, characterized by its low density and higher concentrations of lighter elements like silicon, aluminum, calcium, sodium, and potassium. It forms only about 1 percent of Earth's mass and 2 percent of its volume. There are two primary types of crust: the continental crust, which is thicker, less dense, and similar in composition to granite; and the oceanic crust, which is thinner, denser, and similar in composition to basalt. The crust is where we find the majority of earthquakes, which generally occur in the uppermost, more brittle layers.
The lithosphere includes the crust and the uppermost part of the mantle, with the crust itself being broken up into tectonic plates that float on the mantle and move a few centimetres per year. This motion can create new crust at mid-ocean ridges and recycle old crust back into the mantle at subduction zones. The crust is where we find all of our mineral resources and fossil fuels, making it of great interest for human activities.
The characteristics of anatomical position includes all of the below EXCEPT:
A.
The feet are together.
B.
The face is forward.
C.
The arms are at the side.
D.
The palms are prone.
Answer: The answer would be D. The palms are prone. Trust me i'm 100% positive.
Explanation: Prone position is a body position in which the person lies flat with the chest down and the back Concerning the forearm
Final answer:
The answer is D. The palms are prone. This is incorrect because, in the anatomical position, the palms should be facing forward (supine), not downward (prone).
Explanation:
The characteristics of the anatomical position include all of the following EXCEPT: D. The palms are prone. In the anatomical position, the body is standing upright, with the feet at shoulder width and parallel, toes pointing forward. The upper limbs are held out to the side with the palms of the hands facing forward.
When the palms are prone, it means they are facing downward which is not consistent with the standard anatomical position, where the palms face anteriorly (forward). Instead, when the palms face forward, they are in a supine position. Therefore, option D is incorrect as it contradicts the standard anatomical position.
What are some facts about the marine ecosystem?
Answer:
The Marine Ecosystem is the Largest Ecosystem on Earth
The oceans alone cover about 70% of the Earth's surface or 140,000,000 square miles. The average ocean depth is about 12,000 feet and the deepest point is the Mariana Trench in the Pacific Ocean with a depth of about 32,800 feet.
Explanation: