Answer:
The project showed no control over the confounding variable.
Explanation:
The confounding variable are variables that can influence the dependent variables and that were not established by the researchers. These variables exist naturally in the experiment and are able to alter the result of the experiment in a very intense way.
The dependent variable, in the case presented in the question above, is the proliferation of vegetation around the Acacia plants, while the independent variable is the amount of ants present in the environment. As we can see these two variables are being controlled by the researchers, however, the confounding variables such as soil fertility, water availability, sunlight intensity, wind intensity, are not being controlled and this can severely damage the experiment.
The element of experimental design that is missing or flawed is that the experiment did not control any confounding variable.
CONFOUNDING VARIABLE:A confounding variable in an experiment is a variable that can influence the outcome of the dependent and independent variables.
In this experiment, the dependent variable is case the proliferation of vegetation around the Acacia plants, while the independent variable is the amount of ants present in the environment.
In order to effectively observe the effect of the independent variable on the dependent variable, the confounding variables that must be kept constant or controlled include:
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Which of the following is a characteristic of renewable sources of energy
They are exhaustible
They cause air pollution
They will run out soon
They cause less pollution
Pls help ty
They cause less pollution. Renewable sources of energy, such as solar, wind, and hydroelectric, cause significantly less air and water pollution than non-renewable sources, such as coal and oil.
What is pollution?Pollution is the presence of toxic substances in the environment that can have a negative effect on humans, animals, and plants. It can either be the result of natural processes or due to man-made activities. Pollution can occur in the air, water, soil, and even in the food we consume. Common forms of pollution include air pollution, water pollution, plastic pollution, and noise pollution. Air pollution is the release of pollutants into the air which can cause harm to humans and the environment. Water pollution is the contamination of surface or ground water and can be caused by agricultural runoff, industrial pollution, and sewage. Plastic pollution is the accumulation of plastic particles in the environment that can damage ecosystems.
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A small proportion of humans have resistance to strains of HIV, the virus that causes AIDS. Their immunity is caused by a deletion in gene CCR5, a co-receptor on white blood cells needed for HIV infection. The proportion of people with resistance (genotype aa) to HIV is approximately 8%. If these alleles are in Hardy Weinberg equilibrium, what proportion of people are carriers for the HIV resistant allele?
Answer:
The correct answer is "40.6%". A further explanation is provided below.
Explanation:
The given values are:
The proportion of people with resistance is,
aa = 8%
or,
= 0.08 (q²)
q² = 0.08
q = √0.08
= 0.28284
Now,
⇒ [tex]p+q=1[/tex]
⇒ [tex]p=1-q[/tex]
[tex]=1-0.28284[/tex]
[tex]=0.717157[/tex]
hence,
For the HIV resistant allele, the proportion of people will be:
= [tex]Aa[/tex]
= [tex]2pq[/tex]
On substituting the values, we get
= [tex]2\times 0.71715\times 0.28284[/tex]
= [tex]0.4056[/tex]
= [tex]40.6[/tex] (%)
The proportion of the population with the carrier of HIV-resistant allele is 40.56%.
What is Hardy Weinberg equilibrium?
Hardy Weinberg equilibrium is the relationship between the variation from one generation to the next. The equation for the relationship can be given as:
[tex]p^2+2pq+q^2=1[/tex]
Where the proportion of dominant alleles is p².
The proportion of recessive alleles is q².
The proportion with the caries are 2pq.
The given recessive allele proportion in the population is 0.08. The proportion of dominant alleles can be given as:
[tex]q^2=0.08\\q=0.2828[/tex]
The dominant alleles can be given as:
[tex]p+q=1\\p+0.28284=1\\p=0.717157[/tex]
The carriers in the population can be given as:
[tex]\text{Carriers}=2pq\\\text{Carriers}=2\;\times\;0.717157\;\times\;0.2828\\\text{Carriers}=0.4056\\\text{Carriers}=40.56\%[/tex]
Thus, the carriers for the HIV gene in the population are 40.56%.
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Experts and above ONLY
To answer this u have to be expert, ace or genius level
25 PTS PLEASE HELP QUICK
(not related to the question but please add thx i want friends)
OK THX THE QUESTION IS BELOW
Answer:
Answers are in the image
Which structure can be found in a eukaryotic cell but NOT in a prokaryotic cell?
A.
mitochondrion
B.
cytoplasm
C.
chromosome
D.
plasma membrane
Answer:
Plasma membrane
Explanation:
Which number represents runoff on the hydrologic cycle diagram?
1
2
3
4
Answer
No. 4
Explanation:
12. Which type of erosion forms limestone caves?
A. wind erosion
B. stream erosjon
C. groundwater erosion
Answer:
c. groundwater erosion
Answer:
Hello There!!
Explanation:
I believe the answer is C. groundwater erosion.
hope this helps,have a great day!!
~Pinky~
pls help me I am rlly confused
All of an organism's characteristics are inheritable which evolves over millions of years. An example of this is the modern day horse's foot.
What is Evolution?This is referred to as the change in the heritable characteristics of biological populations over successive generations.
All an organism's characteristics can be inherited and evolves over a period of time as a result of the changing environmental conditions which helps them to adjust thereby increasing their chances of survival hence preventing extinction of species.
For example, over millions of years of evolution, many horses lost their side toes and developed a single hoof as a result of them needing to move at faster speeds to evade predators.
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Please help meeeee omgggg!!!
Answer:
Pollination
Explanation:
Bees and other pollinators drink nectar and get pollen on their feet and little pockets. When they go drink from another plant, the pollen falls on the reproductive organ and reproduction has begun.
Hope this helped :)
Answer:
The answer is A.
Explanation:
The answer is A. because for two pants to breed it depends on the pollen.
Decomposers are very important because
A. They recycle energy
B. They recycle matter
C. They destroy what we don’t need
Does every gene combination show up in the offspring?
Answer:
Answer!
Explanation:
Okay so, genes come in different varieties; which are called allele. somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism. BUT, an allele that is hidden, or not expressed by an organism, can still be passed on to that organism's offspring and expressed in a later generation.
During meiosis I, chromosomal pairs randomly align along the metaphase plate. Each chromosome pair member carries one allele for each gene. Every gene combination shows up in the offspring.
Chance determines which of the 23 homologous pairs of both parents' chromosomes are inherited. The possible combinations of 23 chromosomal pairs total 8,324,608. As a result, the chromosomal combinations of two gametes are almost never identical.
Actually, each parent has two distinct gene pools. Additionally, only half of each parent's DNA is passed on to their offspring. and that the randomness of the portion that is passed down. All of these factors work together to guarantee that every child has a distinct collection of genes.
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Pleeeeeasssssee heeelp asap The image is attached
The box lists some characteristics of a plant that has adapted to conditions in Its environment. Grows in clusters and low to the ground Able to grow under a layer of snow Carries out photosynthesis at temperatures below freezing Flowers very quickly and briefly during Summer Produces small, moisture-retaining leaves To which type of environment is the plant best adapted? A. Desert Grassland Rainforest D. (ID Tundra
No links i will report
what is meant by photosynthesis?
Answer:
The process in which green plants use sunlight to synthesize nutrients from carbon dioxide and water.
Explanation:
When blood passes through a capillary bed in the
it downloards O2 and uploads CO2.
Answer:
Exchange of gases takes place at alveoli sacs of lungs, which are equipped with capillary vessels or bed.
Explanation:
On inspiration or taking air through nostrils, surrounding air enters the lungs and it reaches air sacs or alveoli. Here, the outside air will have more amount of oxygen when compared with oxygen in blood at that site. Hemoglobin in the blood have high bonding capability to oxygen, so it captures oxygen and takes it to heart for pumping into other parts of the body. Likewise, the circulations continues from lungs to heart > hear to body parts > body parts to heart > heart to lungs for purification.
if wheat is sown in the kharif season what would happen discuss
What is the DNA test examining specifically?
It is comparing the protein enzymes.
It is looking for matching patterns of alleles.
It is trying to find a mutation.
It is examining the lipid level of the cells.
Answer:
it is examining the lipid level of the cells
Explanation:
The general procedure includes: 1) the isolation of the DNA from an evidence sample containing DNA of unknown origin, and generally at a later time, the isolation of DNA from a sample (e.g., blood) from a known individual; 2) the processing of the DNA so that test results may be obtained; 3) the determination of the ...
What happens at the end of the lytic cycle 
observe the cartoon on the next page.Identify each simple machine represented in the machine.your choices will be:lever,inclined plane,pulley,wedge,screw,,wheel and axel,and pendulum.(not really a simple machine,but will be ok in this worksheet)
Answer:
Hii could u please show me the cartoon??
: )
Explanation:
define agriculture plz
Answer:
practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
Explanation:
Answer:
Hello There!!
Explanation:
Agriculture is the art, the science and the practice of cultivating the soil, growing crops and raising livestocks.
hope this helps,have a great day!!
~Pinky~
2. Which of the following is not true of protozoa?
© Lack cell wall
b) Produce no spore bearing structures
c) Comprise the microbial population known as phy
d) Form active feeding forms called trophozoites
Answer:
c) Comprise the microbial population known as phyWhich process is responsible for causing this column of rock to form?
A. crystallization
B. deposition
C. sedimentation
D. weathering
Answer:
i believe it would be a because of stalagtites and stalagmites but i'm not 00% sure
Explanation:
What are air masses, and how do they work? Don't copy and paste.
What are Air Masses: They large volumes of air that have generally the same temperature and pressure.
How they work: One is heated by an electrical current, the other is not. As air flows across the heated wire, it cools down.
Example of an Air Mass: The air masses in and around North America include the continental arctic, maritime polar, maritime tropical, continental tropical, and continental polar air masses. Air is not the same everywhere.
Fact: Unstable air masses have different temperatures and pressures.
How they are formed: An air mass forms whenever the atmosphere remains in contact with a large, relatively uniform land or sea surface for a time sufficiently long to acquire the temperature and moisture properties of that surface.
*** The Earth's major air masses originate in polar or subtropical latitudes.
the energy role responsible for capturing the energy from the sun and turning it into food is a
A. producer
B. Consumer
C. Decomposer
Answer:
A. Producer
Explanation:
The primary source of energy for almost every ecosystem on Earth is the sun. Primary producers use energy from the sun to produce their own food
Answer:
Hi, there the answer is A. producer
Explanation:
All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the sun to produce food (sugar) from carbon dioxide and water.
deoxigenated blood returns to the heart via the vena cava. where does the blood go from the vena cava
a. left ventricle
b. left atrium
c. right ventricle
d. right atrium
Answer:
D
Explanation:
PLZ HURRY I ONLY GOT ABOUT 10 MINS LEFT
Answer:
b
Explanation:
i had this same quiz when i was younger
The answer is B: tectonic movement.
The shifting of tectonic plates is what is responsible for the movement of continents over millions of years.
Describe how you would identify mutations that are dominant. Describe how you would identify mutations that are dominant. To identify dominant mutations, breed the mutant individual to a mutant individual. Dominant mutations will be visible in the F1 generation. To identify dominant mutations, breed the wild-type individual to a wild-type individual. Dominant mutations will be visible in the F1 generation. To identify dominant mutations, breed the mutant individual to a mutant individual. Dominant mutations will be visible in the F2 generation. To identify dominant mutations, breed the mutant individual to a wild-type individual. Dominant mutations will be visible in the F2 generation. To identify dominant mutations, breed the mutant individual to a wild-type individual. Dominant mutations will be visible in the F1 generation.
Answer:
To identify dominant mutations, breed the mutant individual to a wild-type individual. Dominant mutations will be visible in the F1 generation.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Why do organisms compete for food and water?
Answer:
Organisms compete for the resources they need to survive- air, water, food, and space. In areas where these are sufficient, organisms live in comfortable co-existence, and in areas where resources are abundant, the ecosystem boasts high species richness (diversity).
Explanation:
All living organisms _______
A. Photosynthesize
B. Respire
C. Move
D. Feed
E. Transpire
Answer:
B. Respire
hope it helps ... 【◆◆】
Describe the structure of a fibrous joint and give an example of where this occurs in the body.
Which option is a renewable source of energy?
a.Petroleum
B. Wind
C. Nuclear power
D. Coal
Answer:
B. Wind
Explanation:
Because nature constantly replenishes the wind, we can continue to harness its power without worrying about running out of it.
Which current has a warming effect on the climate of the southeast coast of Africa?
Answer:
Agulhas Current
Explanation:
The Agulhas Current transports warm water from the Indian Ocean southwards along the South African coast.
Answer:
Agulhas Current
Explanation:
Other persons explanation