Answer:
the Variable that need to be controlled in this investigation is :
1. Temperature: Temperature affects the rate of the reaction and must be kept constant throughout the experiment to ensure accuracy.
2. Concentration: The concentration of the reactants must be kept constant in order to ensure that the reaction rates are being accurately measured
Which one of the following is the major cause of algal bloom?
a. Presence of heavy metals such as lead and copper
b. Eutrophication or nutrient enrichment of water bodies
c. Erosion of soil and rocks
d. Contamination of water bodies by disease-causing microorganisms called pathogens
Answer:
b option is the correct answer
Eutrophication or nutrient enrichment of water bodies is the major cause of algal bloom (Option b).
Eutrophication refers to the process of nutrient enrichment caused by an excess of primary productivity in water bodies.This process (eutrophication) is associated with the increase in the concentration of different elements such as phosphorus, nitrogen, and other plant nutrients, which may lead to an abnormal toxic algal bloom.For example, recently, eutrophication led to a toxic algal bloom that cut off drinking water supplies for approximately 10 million people at Taihu Lake (China).
In conclusion, eutrophication or nutrient enrichment of water bodies is the major cause of algal bloom (Option b).
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What is a likely reason why dark fur has not evolved in the population of mice that live on this lava flow?
There could be several reasons why dark fur has not evolved in the population of mice that live on a particular lava flow. One possible reason is that dark fur may not provide any adaptive advantage to these mice in their specific environment.
What is the significance of the dark fur mouse?In the case of dark fur in mice, there are several factors that could explain why it has not evolved. One possible explanation is that dark fur may be maladaptive in the environment of the lava flow. If the lava flow has a high ambient temperature, dark fur may absorb more heat and cause the mice to overheat, which could be detrimental to their survival. On the other hand, if the lava flow has low light conditions, dark fur may not provide any camouflage advantage and may make the mice more visible to predators.
Hence, one possible reason is that dark fur may not provide any adaptive advantage to these mice in their specific environment.
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How often do orcas need air?
Orcas can't even come close to holding their breath for as long. Their maximum duration is approximately 15 minutes, but we typically observe them surfacing for air every 3-5 minutes when traveling or every minute when moving quickly.
The orca, also known as the "killer whale," is the largest member of the dolphin family and is a whale with teeth. These large marine mammals are easy to spot due to their black-and-white coloring, large dorsal fin, and sleek body. On the fluke's undersides, ventral surface, and lower jaw, bright white is the predominant color. The distinctive patterns serve as a method of concealment when they are searching for food.
Whales, like humans, breathe in oxygen through their lungs. However, rather than breathing through their mouths, they breathe through their nostrils, which are the blowholes on top of their heads. They can easily breathe through the blowhole without lifting their entire head out of the water.
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What is a future threat of overpopulation?
a) Fewer habitats will be destroyed.
b) Pollution will decrease excessively.
c) Global warming will increase more rapidly.
d) Biodiversity will increase excessively.
Answer:
C, global warming will increase
Explanation:
Answer:
c) Global warming
Explanation:
I hope this helps
How do I put links in APA style? Pls tell me
Answer:
Explanation: Citing a Link in the Bibliography APA Style List the author's last name followed by first initial, separated by a comma. If there is more than one author, but less than six, put a comma directly after the first initial and list up to two more names in the same fashion. An "&" symbol should be used in place of a comma before the last name listed.
What information can be deduced from a pedigree? Select the TWO answers that are correct.
a. the probability of a female being a carrier of an X-linked allele
b. how an X-linked trait is passed down over generations
c. the probability of a parent or grandparent being infertile
d.how autosomal traits contribute to X-linked traits
e. the probability that Y-chromosome analysis will prove paternity
The likelihood that a female will have an X-linked allele. if How a pedigree may be used to infer information.
What kind of attribute has an X-linked ancestry?Reddish tint blindness with hemophilia A: Ruby color blindness are two examples of Cross recessive diseases. Red-green color blindness is simply the inability to discriminate between the many hues of red and greens (usually blue-green).
Can Y-linked disease impact women?Y-linked characteristics only appear in male progeny of an afflicted man and never in females. Due to the fact that an only allele (on the Y gene) is ever present in a single (male) person, the terms dominant and recessive need not apply to Y-linked characteristics.
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Which of the following is true concerning the anatomy of a skeletal muscle fiber?
a. actin and myosin sliding past each other and partially overlapping
b. certain smooth muscle cells can actually divide to increase their numbers
c. tropomyosin
d. myofibrils contain thick and thin filaments
A protein which regulates the activity of the lactose locus is located outside the lac operator and is encroaching, a globular contractile protein, works with myosin to contract muscles.
The single cells are what?Unicellular creatures are sometimes known as single-cell organisms. In contrast to multicellular creatures, which are made up of many cells, single cell organisms were minuscule and consist of just one cell. They are capable of functioning as a single cell that is capable of sustaining life.
What are some uses for single cells?Single-cell sequencing technology may identify individual immune cells, making it possible to distinguish between distinct immune cell types and learn about the relationships between them.
This contributes to our understanding of the intricate immune system and suggests new disease-treating targets.
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What has occurred in the bacterial cell on the right?
A. It was cloned from the cell on the left
B. It contains recombinant DNA and can make a new protein
C. Its plasmid is unchanged
D. The bacterial cell on the right transformed the cell on the left
Why do leaves change colour explain?
Carotenoids are pigments that give leaves their yellow and orange colors. These pigments are always present in leaves, but become more visible as the chlorophyll breaks down in the fall.
Leaves change B due to changes in the pigments that are present in the leaf. Chlorophyll is the pigment primarily responsible for the green color of leaves and is present in all leaves. Chlorophyll is important for the process of photosynthesis, which allows plants to convert light energy into chemical energy. However, as the days get shorter and temperatures cool in the fall, the level of chlorophyll in a leaf decreases and the chlorophyll breaks down. This process causes the green color of leaves to fade, revealing other pigments that have been present in the leaf all along.
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How did Darwin prove his theory of evolution?
The patterns he had observed during his travels may be explained by Darwin's theory of evolution by natural selection.
In the case of the Galápagos finch species, it made sense that they would resemble one another as well as mainland finches, who most likely had a common ancestor. The best proof that organisms evolved from a common ancestor is similar DNA sequences. The existence of fossils proves evolution. These samples demonstrated how closely related ancient species were to those that existed during Darwin's time. A progression of evolution can be seen in fossils, which also offer compelling proof that species from the past were distinct from those present now.
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Which of the following is a true statement?
O Balance can be achieved by creating equal visual weight throughout a design, even if the design is not symmetrical
O Balance is achieved only through symmetrical designs.
I engage myself in intellectual and spiritual enrichment by ?
Answer: Spiritual education
Explanation:
The purpose of providing the spiritual education is to provide the divine potential in individuals. It helps in recognizing the religion as an important expression. It helps in understanding the existence of good with us and learn values, beliefs, and practices which once said and followed by god. It helps in transforming character of a person and prevents in conduction of evil practices. It helps in engagement in intellectual and spiritual enrichment.
What offspring is produced if a heterozygous tall pea plant is crossed with a homozygous short pea plant?
That a Tt heterozygous, giant plant produces T and t gametes with equal probabilities whereas a Tt homozygous, narrow plant exclusively produces t gametes, their offspring 50% tall and 50% short are crossed.
What does the term "heterozygous" mean?The term "heterozygous" describes the presence of several alleles for a given trait. You have a dominant gene for that gene if the versions differ from one another. Which qualities are expressed depends on how the two genes are related.
What is an example of heterozygotes?You have a genetic mutation for that gene if the variants differ from one another. For instance, having one gene for red hair but one allele with brown hair could indicate that you are heterogeneous for hair color. Which qualities are expressed depends on how the two alleles are related.
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HURRY I NEED HELP PLEASE
To What Extent Are Calls for Greater Minority Representation in COVID Vaccine Research Ethically Justified
There are a lot of people out there who have ethical concerns about COVID Vaccines. However, based on opinion polls, it seems that many people also have security concerns. So, it seems that the COVID Vaccine in general is ethical. However, a small number of people who have ethical concerns about the vaccine will still refuse to get it.
Ethical considerations and coverage of COVID-19 payments are quite complicated thought. The public has varying degrees of confidence in the COVID-19 vaccine, possibly due to limited information regarding the type of vaccine, date of availability, and safety profile.
Entering 2021, COVID-19 has been a pandemic for more than a year. So far, most countries in the world have not succeeded in suppressing the spread of the disease. Efforts to make social disclosure have a negative impact on the economy and social welfare. An effective vaccine is the beacon of hope for the world. The COVID-19 vaccine is the first vaccine to be developed in a very short period. The pressure from the world to apply the vaccine is very high.
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What was the limit on Mann‘s part that prevented him from having a written revelation until the 15th century BC
It can be concluded that the lack of technology and literacy on the side of man prohibited him from experiencing a written revelation.
The degree of technical progress may have been a barrier on man's behalf that delayed the creation of written revelation until the fourteenth century B.C. People technology probably used oral traditions to pass down their religious and spiritual ideas before the development of writing systems like cuneiform and hieroglyphics. A written language and the ability to preserve knowledge, such the creation of paper or parchment technology, would also have been essential for written revelation to take place. Important to keep in mind is the possibility that diverse cultural, societal, and historical technology factors may have affected how written revelation developed.
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Procrastinators will usually ________. a. work on important tasks after valuable time has passed. b. work on tasks that are not priorities c. work on tasks in a haphazard way d. all of the above Please select the best answer from the choices provided A B C D
Answer:
d
Explanation:
Which of the following would you expect to have the least effect on hematocrit percentage?
A) prolonged or excessive fever
B) living at higher altitude
C) dehydration
D) injection with erythropoietin (EPO)
who gave the concept of vaccine and immunization?
What are the 5 main food groups and their function?
Five main food groups are Carbohydrates ,Protein, Dairy products, Fruit and vegetables and Fats and sugars.
These five food groups are responsible for providing wide array of vitamins and minerals that our body needs for proper and efficient functioning .
Carbohydrates are body's primary source of energy or preferred energy source. Carbs are generally broken down by the body into glucose which is also a type of sugar. Protein are responsible to work with cells for maintaining proper structure, function, and regulation of the body's tissues and organs. vegetables and fruits helps lower blood pressure, reduce the risk of heart disease and stroke, prevent cancers. Fats store energy and protect vital organs .
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There is only 1 major predator in this environment, and it
can only eat the small and medium sized fish. So, the
frequency of the large sized fish would go up in
generation 2. This is an example of
selection.
In a bird egg the developing embryo is inside the amnion, which contains fluid. The embryo gets nourishment from the yolk. The chorion lines the inside of the shell and helps protect the embryo. What structures in a human provide the same functions as these structures in the bird egg?
Answer: Placenta
Explanation:
Placenta is the outer protective envelope around the developing embryo. It is attached with the lining of the uterus. It has a permeable membrane which allows the entry of oxygen and nutrients to be supplied to the embryo. It helps in getting rid of harmful substances like carbon dioxide and waste from the developing fetus body.
how deos the structure of water molecule result in the hydrogen bodning ? use evidence from the image below
The structure of water molecule result in the hydrogen bonding in that:
The structure of a water molecule results in hydrogen bonding due to the distribution of electrons in the molecule. Water molecules are made up of two hydrogen atoms bonded to a single oxygen atom, forming the chemical formula H2O.What is the hydrogen bonding about?The oxygen atom has a higher electronegativity than the hydrogen atoms, which means it is more effective at attracting and holding onto electrons. As a result, the oxygen atom has a partial negative charge and the hydrogen atoms have partial positive charges.
Therefore, a partial positive charges on the hydrogen atoms are attracted to the partial negative charge on the oxygen atom of another water molecule, forming a hydrogen bond. This is a weak chemical bond, but it is significant enough to give water many of its unique properties, such as its high surface tension and ability to act as a solvent.
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describe in your own words the cycle of an ecosystem
Answer:
An ecosystem is where there are many organisms such as plants and animals also including weather and landscape. Ecosystems have biotic and abiotic things . Ecosystems can be very large or very small.
Explanation:
Explain why ozone in the lower atmosphere is a bad thing but why ozone in the upper atmosphere is a good thing.
Answer:
Ozone in the lower atmosphere (troposphere) is a bad thing because it can make health problems occur (problems like hard breathing and asthma) and environmental, while ozone in the upper atmosphere (stratosphere) is a good thing because it protects living things from ultraviolet light from the sun.
Explanation:
Ozone in the lower atmosphere is not emitted directly into the air, and it is created via man-made products (factories, cars, chemical solvents, etc.). When ozone in the lower atmosphere is created, it does not go into the upper atmosphere. Since ozone in the upper atmosphere is above a lot of living things (depending on where the living thing is), it does not cause as many bad effects as ozone in the lower atmosphere, which makes it good.
Describe 3 alternative energy technologies and identify two ways that hydrogen gas could be used as a fuel in the future
Answer:
hope it helps..
Explanation:
In the future, hydrogen will join electricity as an important energy carrier, since it can be made safely from renewable energy sources and is virtually non-polluting. It will also be used as a fuel for 'zero-emissions' vehicles, to heat homes and offices, to produce electricity, and to fuel aircraft.
How long does it take to be affected by cyanide?
Answer:
The patient can present with symptoms as quickly as one minute after inhalation and within a few minutes of cyanide ingestion. If the hydrogen cyanide was inhaled, the victim might detect a bitter, almond odor, which is discernible by approximately 60% of the population.
Explanation:
what is photosynthesis
Photosynthesis is a synthesis of compounds with the aid of radiant energy especially in plants.
Radiant energy it transmitted in the form of electronmagnetic radiation; energy that exists in the absence of matter.
Synthesis is the process of producing a chemical compound usually by the union of simpler chemical compounds.
The combination of ideas into a complex whole.
Reasoning from the general to the particular or from cause to effect.
Whats the difference between Asexual and sexual reproduction and how are they similar (5-7 sentences)
Answer:
Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent. They both require reproduction. Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual reproduction involves two parents and produces offspring that are genetically unique.
Explanation:
an antonym for immerse?
Answer:
An antonym of immerse is dry.