A dependent variable is the number of colonies produced. The experiment gives a useful insight into the toxicity of the chemicals.
A scientific experiment must always have a dependent and an independent variable. A dependent variable is the variable whose outcome is being determined by manipulating the independent variable which in this case is the presence or absence of the chemicals.
Toxicity of chemical substances is a very important information to scientists as such this experiment is very important because it highlights the toxicity of the chemicals to living things.
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hurry plz due in five min
Answer:
Its B the 2nd option
Explanation:
.......
What gives a male widowbird greater reproductive success?
Answer:
Food and feeding
The long-tailed widowbird's diet generally consists of seeds, supplemented occasionally by arthropods. The birds do most of their foraging in flocks on the ground, though they are occasionally observed hawking insects airily.
A student conducted a comparative investigation to test the hypothesis that different areas of New York City have different levels of air pollution. Which is a likely benefit of this comparative investigation?
A It provides her with a large amount of information about air pollution in New York City.
B It provides her with results that are valid for a long time.
C It requires that she observe a limited number of variables.
D It allows her to learn about the causes and effects of air pollution in major cities.
Answer: A. It provides her with a large amount of information about air pollution in New York City.
Explanation:
A comparative investigation is when data is collected in order to make a particular comparison.
With regards to the question, the student conducted a comparative investigation in order to test the hypothesis that different areas of New York City have different levels of air pollution.
The benefit of this study done by the students is that it will provide her with a large amount of information about air pollution in New York City. The area with the highest air pollution, what causes air pollution and other necessary information can be gotten.
Therefore, the option is A.
Whats the difference between a mixture and a compound? Mixtures are impure and compounds are pure, but how are mixtures formed? Are they formed with elements combined are something else? Please help! Dont copy and paste
Answer:
A compound is chemically bonded whereas mixtures are not. Compounds have a set amount of atoms that are conjoined, maybe through the process of heat, acid, water, etc, but, mixtures two things roughly mixed together, not chemically bonded.
Explanation:
Hi rosanna, im rlly bad at science lol
Which two elements are always found in amino acids?
Answer:
carbon and oxygen
Explanation:
hope this helps :)
(pic attached) can anyone help me?
Kelvin's cow is showing signs of poor health. The cow is staying away from the herd and not alert in its environment. The veterinarian believes
that the cow is affected by some type of infection. He also states that the lack of white blood cells in the cow is making it less resistant to the
infection. Which system of Kelvin's cow is not functioning properly?
ОА
muscular system
OB
endocrine system
Ос.
nervous system
OD
circulatory system
Answer:
D. circulatory system
Answer:
D. circulatory system
Explanation:
pls help
Molecules move in and out of a cell by DIFFUSION. The picture shows a cell and molecules both inside and outside the cell. How will the molecules in this illustration move as a result of diffusion?
Answer:
They will move into an external environment
Explanation:
I had this question on my test last week
A yellow-skinned CHNOPS meets the blue-skinned CHNOPS of their dreams. They get married and have a green-skinned CHNOPS baby. What type of inheritance (Complete dominance, Incomplete dominance, or Co-dominance) is illustrated by this example? Pick the best answer with the correct justification
A.Complete dominance, because it blends
B.Incomplete dominance, because you see two traits
C.Co-Dominance - because it blends D.Co-Dominance, because you see two traits
E.Incomplete dominance, because it blends
F.Complete dominance, because you see two traits
Answer:
uwiwiwuwwieh
Explanation:
Answer
co-dominance
recessive
Explanation:
100 on edge trust me!!
How does the burning of fossil fuel affect the carbon cycle?
A.The more fossil fuels are burned, the less carbon dioxide enters the atmosphere, less than can be absorbed by plants or the ocean.
B.The more fossil fuels that are burned, the more carbon dioxide enters the atmosphere, more than can theoretically be absorbed by plants or the ocean.
C.The less fossil fuels are burned, the more carbon dioxide enters the atmosphere, more than can be absorbed by plants or the ocean.
D. The more fossil fuels are burned, the more oxygen enters the atmosphere, more than can be absorbed by plants or the ocean.
Answer:
B.The more fossil fuels that are burned, the more carbon dioxide enters the atmosphere, more than can theoretically be absorbed by plants or the ocean.
Explanation:
The most reasonable answer.
The more fossil fuels that are burned, the more carbon dioxide enters the atmosphere, more than can theoretically be absorbed by plants or the ocean.
What are fossil fuels?Fossil fuels are made from decomposing plants and animals. Coal, oil, and natural gas are examples of fossil fuels.
When fossil fuels are burned they release a large number of carbon dioxide a greenhouse gas in the air. This leads to increases in the temperature of the globe. If the temperature of the earth increases it leads to the melting of icebergs.
Coal, oil, and petrol are some examples of fossil fuels. Oil releases a huge amount of carbon when burned, approximately one-third of the total carbon on earth.
Carbon dioxide is a greenhouse gas, this gas generally releases trapped heat in our atmosphere.
Therefore, The more fossil fuels that are burned, the more carbon dioxide enters the atmosphere, more than can theoretically be absorbed by plants or the ocean. Option B is correct.
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Help!!!
What are the tools and technology used to carry out PCR tests ????
Answer:
Equipment: Thermal cycler is a technology that can change the temperature of the DNA segment. A thermal cycler can raise and reduce the temperature quickly. This allows the PCR process to happen over and over again.
Tools:
Taq polymerase build complementary DNA strands
DNA primers attach to each end of the target sequence
DNA nucleotides or dNTPs make up the DNA
Explanation:
Graves’ Disease is an autoimmune disorder that causes an overproduction of the hormone produced in the thyroid. These hormones are responsible for cellular metabolism. What would this disorder probably result in?
Answer:
Explanation:
Graves' disease is an autoimmune disorder in which antibodies produced by your immune system stimulate your thyroid to produce too much T4. It's the most common cause of hyperthyroidism. Hyperfunctioning thyroid nodules (toxic adenoma, toxic multinodular goiter or Plummer's disease).
Advances in technology have helped many industries, including agriculture. Which agricultural application is most likely
to be affected by new advances in DNA technology from the Human Genome Project?
O a researcher who is investigating selective breeding of livestock
O a farmer who is planning a harvest schedule for genetically modified crops
O a plant scientist who is modifying the genetic information of crop plants in a laboratory
O a conservationist who wants to find water sources in drought-prone places
Answer:
O a researcher who is investigating selective breeding of livestock
Explanation:
The Human Genome Project (HGP) aims at determining the full nucleotide sequence of the human genome, which can be used for the identification, characterization and mapping of the human genes. The livestock genome sequence exhibits a high level of conservation with the genomes of many mammals including humans. In consequence, the information obtained by mapping genes from the HGP can be of help to map livestock genes. The livestock genome mapping projects have greatly been helped by the increasing availability of human and murine genome sequences, which has been used in comparative genomics for the identification of candidate genes involved in animal traits.
Answer:
A
Explanation:
Can someone help me asappp
Answer:
im 90% sure its D
Explanation:
well
30 POINTS!! HELP ME PLZZ I NEED HELP WITH THIS!!
Answer:
c
Explanation:
“every cell stems from another cell”
He observed how cell division produced two daughter cells hence all living cells come from pre-existing.
People have built canals and levees to divert water away from its natural flow and prevent floods in residential areas near Florida's Everglades.How have these changes affected the Everglades
Answer:
The everglades begins to start flooding
Explanation:
The everglades soon becomes a wetland and all the area has vast amounts of water making it harder to move on and why it has the wet season, which there is the most water.
Answer:
Areas of wetland have been filed in for houses
Explanation:
What best describes the role of molecular oxygen (O2) in aerobic respiration?
A. It accepts electrons when reacting to form water.
B. It combines with carbon and hydrogen to form glucose.
C. It is released when glucose breaks apart.
D. It reacts to form carbon dioxide and water.
Aerobic respiration involves the reaction of oxidation which involves the acceptance of electrons when the molecular oxygen reacts with protons to form water molecules. Thus, the correct option is A.
What is Aerobic respiration?
Aerobic respiration is the chemical process in which molecular oxygen is used to make the energy in the form of ATP from carbohydrates. It is also called as aerobic metabolism, and oxidative metabolism.
Aerobic organisms can use molecular oxygen (O₂) to generate energy in the form of adenine triphosphate (ATP). The role of molecular oxygen in the process of cellular respiration is to act as the end acceptor of electron. As the electrons are dropped off at the inner mitochondrial membrane during the process of cellular respiration, they travel through the electron transport chain and are finally accepted by the molecular oxygen to form water.
Therefore, the correct option is A.
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Turn all these sequences into Mrna instead of DNA
Amino Acid Sequence
MET-VAL- SER-LEU-STOP
MET-VAL-SER-LYS-STOP
MET-LEU-LEU-LEU-PRO-STOP
MET-LEU-LEU-SER-ALA-STOP
MET-ALA-VAL-VAL-STOP
MET-VAL- ALA-ALA-STOP
Answer:
use this to help you I'm sure you're teacher already reached you how to used this.
Which type of fossils is MOST helpfu
in understanding what the climate w
like for a region in the past?
A.fossils of plants
B. fossils of microorganisms
C. fossils of birds
D. fossils of animals
Answer:
I would say A). The animals in an area can fluctuate and diversify, while plants can't move and will die if conditions are too intense, leaving only the ones accustomed to the climate to survive.
Celula Conjunto de células especializadas que tienen una forma similar y una actividad determinada Conjunto de organos que trabajan de forma integrada y cumplen una función especifica en el organismo. Nivel de mayor complejidad. Constituido por sistemas, que realizan sus funciones en forma coordinada Estructura formada por diferentes tipos de tejidos, que coordinan sus funciones para realizar una tarea especifica Unidad básica de todos los organismos Sistema Tejido Organismo Organo
Answer:
Célula: Unidad básica de todos los organismos
Tejido: Conjunto de células especializadas que tienen una forma similar y una actividad determinada
Órgano: Estructura formada por diferentes tipos de tejidos, que coordinan sus funciones para realizar una tarea especifica
Sistema: Conjunto de órganos que trabajan de forma integrada y cumplen una función especifica en el organismo.
Organismo: Nivel de mayor complejidad. Constituido por sistemas, que realizan sus funciones en forma coordinada
Explanation:
Los organismos pueden ser unicelulares o pluricelulares. Estos últimos tiene muchas células, lo que hace que tengan estructuras mucho más complejas. En ellos hay distintos niveles de organización celular. Se le llama así porque es la célula la unidad básica de absolutamente todos los organismos. En el segundo nivel encontramos los tejidos, en el tercer lugar los órganos, luego en el cuarto nivel los sistemas y por último todos ellos constituyen un organismo, que es el quinto nivel de organización celular.
A su vez, cada uno de estos elementos mencionados en los distintos niveles de organización celular tienen sus propias características y funciones que hacen que se puedan clasificar y dividir en distintos tipos.
A student is observing a single-celled alga and knows that it undergoes photosynthesis and respiration. Which question could the student ask to find out how it can do both processes?
The options associated with the question is :
Are the inputs of photosynthesis the same as the outputs of respiration?
Are the inputs of photosynthesis the same as the inputs of respiration?
Is water needed for the processes of respiration and photosynthesis?
Is carbon dioxide needed for the process of photosynthesis?
Answer:
The correct answer is - Are the inputs of photosynthesis the same as the outputs of respiration?
Explanation:
To understand that it is able to perform both the process photosynthesis and cellular respiration by this single cell of alga it is required to understand the process of both processes and how they provided to the alga.
Photosynthesis is the process that converts water and carbon dioxide into glucose and oxygen as the output or products. Glucose is further used in the cellular respiration with oxygen to produce water and carbon dioxide. So it make balance of the inputs and outputs in the both reaction so it can be understand by asking if the inputs of photosynthesis the same as the outputs of respiration?
Photosynthesis and respiration both are shown by algae because they need light to make food.
Algae are a diverse group of predominantly photosynthetic organisms, including cyanobacteria, green algae, and other eukaryotes. They account for more than 50% of the photosynthesis that occurs on Earth. Photosynthetic efficiency is higher in algae than in higher plants. Algae use carbon dioxide for cellular respiration. It binds CO2 and reduces the amount in the atmosphere.
The questions which students can ask are :
Are the inputs to photosynthesis and the outputs to respiration the same?
Are the photosynthesis and respiration inputs the same thing?
Is it true that water is required for respiration and photosynthesis?
Is carbon dioxide required for photosynthesis?
what are algae?A group of photosynthetic, aquatic, marine, true root stems leaves bearing organisms.
thus it concludes algae can perform both cellular respiration and photosynthesis.
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DNA and RNA are both types of —
A. enzymes
B. polysaccharides
C. proteins
D. nucleic acids
The giant african land snail is an invasive species that is also the largest snail ons earth what is most likely consequence of introducing this invasive species into a stable ecosystem?
A. The native snail species will change their diet therefore destabilizing the ecosystem.
B. The native snail species will move to another area allowing the ecosystem to remain stable.
C. The native snail species will share their food with the invasive species stabilizing the ecosystem.
D. The native snail species will compete for resources with the invasive species and destabilize the ecosystem
Answer:
D. The native snail species will compete for resources with the invasive species and destabilize the ecosystem
Explanation:
In Ecology, an invasive species refers to a species of organism that is foreign i.e. non-native to a particular habitat or environment. They are characterized by the ability to proliferate in growth and compete for space and nutrients with the native species in the habitat they are introduced to.
In this case, the giant african land snail, which is an invasive species, if introduced into a stable ecosystem will compete for resources with the native species of that ecosystem leading to the destabilization of the ecosystem.
How far is the sun from the earth and how long does it take to get to the sun from earth?
Answer:
Earth's closest approach to the sun, called perihelion, comes in early January and is about 91 million miles (146 million km), just shy of 1 AU. The farthest from the sun Earth gets is called aphelion. It comes in early July and is about 94.5 million miles (152 million km), just over 1 AU.
(2) Which of the following describes the movement of particles down/ with a concentration gradient and how ?
Question options:
a)
Osmosis
b)
active transport
c)
diffusion
d)
both osmosis and diffusion
Answer:
Both osmosis. And diffusion
I don't understand this. Can someone help me?
Answer:
I just got points for being useless
Explanation:
LOL
Which type of seed do you think the ground finches preferred? Why do you think this?
Answer: soft seeds
Explanation:
Tiny, soft seeds that are easy to crush are preferred by the medium ground finch to feed. During droughts, however, they often consume the larger seeds on the island when small seeds are not as available.
Evaluate Claims A student claims that the four types of macromolecules make up all of the important compounds of the human body. Provide evidence and reasoning to support or refute this claim.
Answer:Hi I’m sorry I’m not helping I just really need to answer something for points so I can ask a question
Explanation:
It’s due tomorrow and it’s for a grade so im freaking out
The structure below is used in agriculture. What could be a benefit of this
technology?
A. It can be used to grow food in areas with a shortage of land.
B. It can create food using more land than a traditional farm.
C. It can be used to grow food without sunlight.
D. It can create unemployment problems in the farming industry.
Answer:
A. It can be used to grow food in areas with a shortage of land.
Explanation:
Answer:
A
Explanation:
Why does ice become less dense than water?