The controlled variable is kept constant during the whole experiment in all the different study groups. In this experiment, Sodium bicarbonate solution is the controlled variable.
------------------------
During an experiment, the controlled variables are kept constant in the control groups and the experimental groups. Unlike the independent variable, the controlled variables do not influence the results. These variables do not affect the response of the dependent variable.
In this experiment,
The independent variable → presence/absence of light reaching the plant. The researcher regulates the amount of light by using different elements such as the bucket, lamp, flashlight, and natural light. The dependent variable → oxygen production through which the researcher measures the photosynthesis rate. The controlled variable → Sodium bicarbonate solution. It provides carbon dioxyde, and must be constant in the four scenarios to avoid an effect on the results.-----------------------
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any 5 Reason wetlands destroy?
Answer:
Deforestation
flood
landslide
waste drainge
Unplanned urbanization
Explanation:
these are the main 5 problems that destruct the wetland
Which of the following could your family do to lower its carbon footprint?
Answer:
That's correct
Explanation:
Insulating homes lower footprint
Set the thermostat 2 degree warmer in winters could lower your family carbon footprint.
What is carbon foot print ?
A carbon footprint is the total amount of greenhouse gases (including carbon dioxide and methane) that are generated by our actions.
What does reducing carbon foot print mean?Reducing your carbon footprint at home typically means consuming less energy.
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Choose appropriate words to complete the paragraph below to explain the general trends shown in a predator-prey graph.
Breathe, Muscles, Oxygen, Lactic, anaerobic respiration, Oxygen aerobic respiration, Break down
An increase in the prey population provides more food for the _________ , allowing more to survive and _________ . This is turn results in an _________ in the predator population. The larger predator population eats more prey organisms, causing a _________ in the prey population. The death rate of the prey is larger than its _________ rate. The reduced prey population can no longer support the large predator population. _________ for food increases, resulting in a _________ in the size of the predator population. Reduced predator numbers results in less of the prey population being killed. More prey _________ and reproduce so the prey population _________ again.
Answer:
.....................
reticulum
03 Choose the incorrect statements,
A) Endoplasmic reticulum transport substances from
one pard of the cell to other part.
B)Golgi bodies pack various Substances before they are
transported to other parts of the cells
c) The materials that
destroyed are
to other the lysosomes
powerhouse of call
need to be
transported to other the
D)Nucleus es considered as the
Answer:
c) The materials that
destroyed are
to other the lysosomes
powerhouse of call
need to be
transported to other the
Explanation:
i think im not sure
Question 6(Multiple Choice Worth 3 points)
(04.02 MC)
Drought is the lack of soil moisture over a period of time. This lack of moisture can be due to which of the following?
O Reduced precipitation
Increased evaporation and/or
transpiration
Higher temperature
All of the above
Answer:
all of the above
...........
Modern trees developed during which era?
O Paleozoic
O Phanerozolc
O Protozoic
O Mesozolc
Answer:
Paleozoic
Explanation:
Not sure dear
Food moved to the back of the mouth by the tongue causes all of the following EXCEPT covering the opening of the larynx by the epiglottis. pressure against the pharynx to initiate swallowing. elevation of the soft palate to seal off the nasal cavity. the swallowing center stimulates successive waves of muscle contraction in the esophagus. churning of the stomach contents.
Answer:
churning of the stomach contents.
Explanation:
When food is moved to the back of the mouth by the tongue (deglutition), it does not cause the churning of the stomach contents.
The churning of stomach contents occurs when the bolus from the mouth has entered through the lower esophageal sphincter into the stomach. Churning is the mixing of the bolus with digestive juices containing acids and enzymes secreted from the stomach lining.
"What if speciation occurred in humans?" Your essay should give a clear and precise example of speciation.
A student is asked to write an essay over the hypothetic prompt above. While brainstorming, the student came up with
four different ideas for their essay. Which idea is BEST aligned with the writing prompt and instructions?
The term speciation refers to the process by which two or more different species are produced from a single original population by different speciation mechanisms. Speciation occurs in three main steps: separation of the original population, divergence (trophic divergence, reproductive divergence, genetic divergence, etcetera), and isolation.
The most related option to speciation is B. Two populations of humans living on separate sides of the ocean. After a catastrophic event, travel across the ocean is not possible. After millions of years of separation, the two groups are no longer able to produce viable offspring together, but can still produce within their isolated groups.
Speciation occurs when the original population is divided into two groups. They inhabit different places and are exposed to varying environmental conditions. With time, each group experience many genetic changes. These mutations depend on each group´s environment and its ecological pressures, and they accumulate in time. Pressures act on individuals and make them adapt to the new environmental conditions. Generation after generation, the genotype of individuals will increase the fitness to survive and reproduce. Fixation of mutations will increase the difference between the two groups, up to the diverging point into two new species. Even is they get together again, these species will not be able to mate and produce offspring, and if they do, the new generations will not be viable or fertile.
The exposed case of two human population living on different sides of the ocean, is an example of allopatric speciation.
Allopatric speciation refers to the geographic separation of a continuous genetic background, originating two or more new geographically isolated groups. During these events of speciation, emerging new barriers impede genetic flow between groups, as the two new populations that are separated can not get together and mate anymore. These barriers might be geographical or ecological.
Different stages are involved in the allopatric speciation process:
• The emergence of the barrier.
• Interruption in the genetic flow
• Slow and gradual differentiation due to the occurrence of mutations in each population and their accumulation in time.
• Genetic divergence by natural selection and reproductive isolation, impeding the two groups to mate even if the barrier disappears.
• Prezigotic isolation mechanisms favored by selection a secondary contact between the new species occurs.
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Answer:b
Explanation:
usatestprep
Can bacteria break down plastics?
Answer:
i don't think bacteria can break down plastic
Decide whether each statement is a 'positive' or 'negative effect of deforestation.
a) It provides land to grow food or keep farm animals.
b) It makes mudslides more common.
c) It allows new roads to be built to connect cities.
d) It can make the area warmer and windier.
e) It can cause extinctions by destroying habitats.
f ) It allows more biofuels to be grown to provide energy.
g) It increases the amount of soil carried away by rivers.
h) It increases the amount of carbon dioxide in the atmosphere.
Answer:
1) negative because it provides land for something and they need to take of trees maybe.
2) positive because that ends up in trees and they grow more
3) negative because it takes a lot of space so trees need to be taken off.
4) positive.
5) negative because the habitats of the animals are normally near trees
6) negative.
7) positive because it lets the trees grow better
8) positive because plant breath carbon dioxide.
nucleus is present in the animal cell
Answer:
Yes.
Explanation:
The nucleus is present in both animal and plant cells.
You are trying to determine if Organism X and Organism Y are different species. Both organism have purple skin and no hair. Organism X is slightly bigger than Organism Y. Organism X reproduced with Organism Y and they were able to have offspring. Those offspring were not able to reproduce.
Select one:
There is not enough information.
They are different species.
They are a hybrid species.
They are the same species.
Answer:
they are different species.
Explanation:
help pls, just need this part on the top
Answer:
Concentration Gradient
Explanation:
This means that it will move from a region where it's in lower conc to a region of higher conc
If the results of an experiment are considered valid they will? A. Give the same nontestable results B. Give The same outcome when repeated C. Give different outcomes in different parts of the world D. give different results from repeated by different scientist
Answer:B
Explanation:
If it's valid, then it has substantial evidence to back up the results, which will be the same over and over again.
A frog cannot keep in the classes pisces why
Answer:
because it has a four chambered heart
Answer:
hii can you be my friend dear
because of 4 chamber of heart
hope it will help you
How do people get natural dye.?
I am thinking that are from trees but I am not sure pls help me
Answer:
people can get first from anything really
Explanation:
plants like lavander can give a slight purple color and etc
Indigo plants ;And woad is to make violet and blue dyes
what is the utility of tissues in multi cellular organisms
Answer:
A tissue is classified as a cluster of cells that work together to perform a particular task and are structurally similar. In multicellular species, the use of tissues provides structural and mechanical strength and enables division of labour.
three parts of stamen
Answer:
three parts of stamen are:
anther
filament
connective .
What is another name for data?
A) square root
B) addition
C) subtraction
D) information
Answer:
the correct answer is option ( D )
Hope it helps you
Mark my answer as brainlist
have a nice day
Answer:
the answer is information
is the presence of industry in developing nations high? what about developed nations?
Answer:
Developing countries don't have lots of industries, so it's not high
Developed nations have a wide variety of industries
Explanation:
Which of the following functions do Golgi bodies provide for the cell?
Help maintain cellular shape
Provide an extra layer of protection for the cell
Direct all cellular activities and act as the brain of the cell
Assist in the early stages of protein and lipid production
The function that the Golgi bodies provide for the cell is that they assist in the early stages of protein and lipid production. The correct option is D.
What are Golgi bodies?The Golgi apparatus is basically an organelle encountered in most eukaryotic cells. It is also referred to as the Golgi complex, Golgi body, or simply the Golgi.
It is a component of the cytoplasmic endomembrane system that packages proteins into membrane-bound vesicles before they are transported to their destination.
Proteins produced by ribosomes in the ER are packed in the Golgi apparatus, where lipids wrap them in a membrane that is then exported from cells.
Molecules entering the Golgi are charged, stored, and then released back into the cytoplasm (secretory vesicles).
The Golgi bodies function in the cell by assisting in the early stages of protein and lipid production.
Thus, the correct option is D.
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18. Which of the following is NOT a distinctive property of minerals?
a. double refraction
b.greasy feel
c. streak
d. magnetism
Answer:
streak
Explanation:
hope that helps
Why do animal cells not need central vacuoles?
A: Animal cells are round.
B:Animal cells have cell walls.
C:Animals do not produce their own food
D:bodies have skeletons.
Answer:
B:animal cells have cell walls
answer these two please
Write the changes occurring in the passage through the alimentary canal as a person has ingested roti and dal as a part of his meal
Answer:
A person had roti and dal for his lunch. Trace the changes in those during its passage through the alimentary canal. Answer: ... The saliva contains an enzyme salivary amylase (ptyalin) which converts starch in roti into maltose, isomaltose and small dextrins called a-dextrin.
Explanation:
Define matter
Thanks!
How does latitude affect a climate zone?
A. Climate zones at high latitudes are cooler because they are closer to the equator.
B. Climate zones at high latitudes receive a lot of precipitation because they are farther C. from the equator.
D. Climate zones at low latitudes receive little precipitation because they are closer to the ocean.
None of the options is entirely correct about latitude and climate zone.
Latitude and climate zoneLatitude is one of the main factors that affect climate, along with elevation, ocean currents, and prevailing winds.
Generally, the farther away from the equator a location is, the colder its climate is. This is because the angle of the sun's rays hitting the Earth's surface is more oblique at higher latitudes, resulting in less heat being delivered per unit of surface area.
However, precipitation patterns are not solely determined by latitude. They are also affected by other factors such as prevailing winds, ocean currents, and topography. For example, areas located on the windward side of a mountain range tend to receive more precipitation than those on the leeward side, regardless of their latitude.
Therefore, while latitude is an important factor in determining climate zones, it does not fully determine precipitation patterns or temperature.
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A scientist is researching Down Syndrome. He is studying what type of disease?
la barrera de Linfocitos B
Answer:Cada linfocito B, al ser activado, produce un anticuerpo específico. El cuerpo tiene millones de linfocitos B diferentes capaces de detectar antígenos distintos. Sin unas barreras de defensa a punto y en forma, no tendríamos manera de combatir los agentes extraños que ingresan en nuestro cuerpo desde el exterior.
Explanation:
What effects are produced on environment by industry?
Answer:
climate change, loss of natural resources, air and water pollution and extinction of species.industrial processes can have negative environmental impact.
Explanation:
