1. What was the dependent variable measured in the experiment?
A.the number of plants surviving after 30 days
B.plant height
C.pH of the water
D.the volume of water used to water the plants in the different groups
e. the mass of the plants in each group
Answer:
b.
Explanation:
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which of the following statements would aquinas (i.e. defenders of the thomistic theory of disability) agree with?
If the first cause in a series of effective causes were to disappear, the subsequent causes would be rendered impossible.
The five proofs of Thomas Aquinas can be summed up as follows:
1. The motion we notice in the universe was started by God, who is the First Mover.
2. The effects we see in the universe have God as their primary cause.
3. God maintains the universe's existence.
4. God is the source of the universe's hierarchy of perfections.
5. The intelligence that directs nature is God.
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You have a large bottle of 2% saline solution in the lab (2% NaCl, which is sodium chloride). You need 5 ml of 0.1% saline for an experiment. Do the calculation for the dilution you would need to make (i.e., calculate the volume of 2% saline and the volume of water you would need to combine).
Answer:
volume of 2% saline (V₁) = 0.25ml
volume of water = 4.75ml
Explanation:
The requirement in the question is to obtain 0.1% of NaCl from 2% NaCl, and the process is dilution. The general dilution equation is guven by:
C₁V₁ = C₂V₂
where:
C₁ = initial concentration = 2%
V₁ = initial volume = ?
C₂ = final concentration = 0.1%
V₂ = final volume = 5ml
C₁V₁ = C₂V₂
calculating for V₁
∴ V₁ = (C₂V₂) ÷ C₁
= (0.1% × 5) ÷ 2%
V₁ = 0.25ml
Now, let us calculate the volume of water needed:
V₁ + Volume of water = V₂ (volume of 0.1% NaCl)
0.25 + volume of water = 5
volume of water = 5 - 0.25
volume of water = 4.75ml
Tests: Watch the following video https://youtu.be/f6c2cZfOULI Start at 3:20.
What are the independent and dependent variables in this experiment?
Independent:
Dependent:
What is the control and the constants to ensure test validity in this experiment?
According to the information, we can infer that the Independent variable: Temperature (specifically, the range of temperature). On the other hand, Dependent variable: Distribution of pikas. Additionally, Control: Pikas within their tolerance range of temperature and Constants: Other environmental factors, habitat conditions, and population of pikas.
What are the independent and dependent variables in this experiment?In this experiment, the independent variable is the temperature, specifically the range of temperature. The researcher will manipulate and observe how different temperature ranges affect the distribution of pikas.
The dependent variable is the distribution of pikas. It refers to the geographical or spatial range in which pikas are found. The researcher will measure and analyze how the distribution of pikas changes in response to different temperature ranges.
What is control and the constants to ensure test validity in this experiment?To ensure test validity, a control group of pikas within their tolerance range of temperature needs to be included. This group will experience temperatures within the range they can tolerate, providing a baseline for comparison. By comparing the distribution of pikas in different temperature ranges to the control group, the researcher can determine the impact of temperature on their distribution.
To maintain validity, other environmental factors such as altitude, precipitation, vegetation, and habitat conditions should be kept constant across the experimental groups. Additionally, the population of pikas being studied should be consistent, without any significant changes in population size or genetic composition throughout the experiment. These constants help isolate the effect of temperature on pika distribution and minimize confounding variables.
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white-tailed deer eat leaves and grasses in their ecosystems.which of the following terms best describes a white-tailed deer
The term that best describes a white-tailed deer is "primary consumer." The correct answer is D
As a primary consumer, the white-tailed deer feeds directly on plants, such as leaves and grasses, which are producers in the ecosystem. Primary consumers are herbivores that obtain their energy and nutrients by consuming plant material.
They play a crucial role in transferring energy from the producers to higher levels in the food chain.
White-tailed deer are not predators because they do not hunt and consume other animals. They primarily rely on plant matter as their source of food.
They are also not secondary consumers, which are organisms that feed on primary consumers. In the context of the ecosystem, the white-tailed deer occupies the position of a primary consumer as it directly consumes plant material for sustenance and energy. Therefore, the correct answer is D.
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Question
White-tailed deer eat leaves and grasses in their ecosystem. Which of the following terms best describes a white-tailed deer?
A. Predator
B. Secondary consumer
c. Producer
D. Primary consumer
Please hurry. Which of the following examples includes only chemical changes that occur in the digestive process?
A: Absorption of nutrients by villi in the small intestines
B: Chewing and swallowing food
C:Recycling of water from dissolved food back into the body
D: Reaction of saliva, stomach acid, bile, and pancreatic juices with food
The example that includes only chemical changes that occur in the digestive process is the reaction of saliva, stomach acid, bile, and pancreatic juices with food. Option D.
What are chemical changes?Chemical changes refer to changes to the chemical properties of substances. In biological reactions, these substances are referred to as reactants.
Chemical changes are different from physical changes. In physical changes, only the physical properties of substances are altered while their chemical properties remain intact.
When a substance changes chemically, its physical properties most often change along. However, this is not in all cases.
Thus, looking at the examples given, their classification into either physical or chemical changes is as follows:
Absorption of nutrients by villi in the small intestines: physical changeChewing and swallowing food: physical changeRecycling of water from dissolved food back into the body: physical changeThe reaction of saliva, stomach acid, bile, and pancreatic juices with food.When saliva, stomach acid, bile, and pancreatic juices react with food, the chemical properties of food change because the enzymes convert different components of food from one form to another as part of the process of digestion.
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Photosynthesis occurs inside of which organelle? a chloroplasts b the cell wall c mitochondria d ribosomes
Answer/Explanation:
Chloroplasts are the organelle that uses chlorophyll. Chlorophyll is in the process of photosynthesis.
Which one of the following biomolecules is synthesized in a smooth endoplasmic reticulum?
(a) Proteins
(b) Lipids
(c) Carbohydrates
(d) Nucleotides
Option b , Lipids is the correct answer. Lipids are synthesized in the smooth endoplasmic reticulum.
This organelle is responsible for the production and processing of a variety of lipids, including fatty acids, phospholipids, and steroids.On the other hand , Proteins are synthesized in the ribosomes, which are located on the rough endoplasmic reticulum, while carbohydrates are synthesized in the Golgi apparatus. Nucleotides, which make up DNA and RNA, are synthesized in the nucleus and cytoplasm. It is important to note that the different biomolecules are produced in specific organelles to ensure that they are properly processed and folded into their functional structures.
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While both the small and large intestines absorb water, they do not share the job equally. Consider the following typical measurements:
Volume entering the small intestine: 9,400 mL
Volume entering the large intestine: 750 mL
Volume leaving the large intestine: 300 mL
1. What percentage of the water entering the small intestine is absorbed by the small intestine?
A.98
B. 94
C.92
D. 96
2 . What percentage of the water entering the small intestine is absorbed by the large intestine?
A. 3
B. 6
C. 5
D. 4
3. What percentage of the water entering the small intestine is not absorbed during the digestive process?
A. 4
B. 6
C. 5
D. 3
Basedon the data provided;
Percentage of water absorbed by the small intestine = 92.5%
Percentage of water absorbed by the large intestine = 3.72%
Percentage of water not absorbed = 3.19%
What is a percentage?A percentage is a ratio or any proportion or share in relation to a whole value.
Percentage of water absorbed by the small intestine = (volume absorbed by small intestine/volume entering small intestine) × 100%
Volume of water absorbed by the small intestine = 9400 - 700 = 8700 mLPercentage of water absorbed by the small intestine = (8700/9400) × 100%
Percentage of water absorbed by the small intestine = 92.5%
Percentage of water absorbed by the large intestine = (volume absorbed by large intestine/volume entering small intestine) × 100%
Percentage of water absorbed by the large intestine = (750 -300/9400) × 100%
Percentage of water absorbed by the large intestine = 3.72%
Percentage of water not absorbed = (volume not absorbed/volume entering small intestine) × 100%
Percentage of water not absorbed = (300/9400) × 100%
Percentage of water not absorbed = 3.19%
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Write the sentence as an equation.
p subtracted from 369 is equal to 311
G
Answer:
p-369=311g
Explanation:
what type of reaction releases energy when bond is broken
Exothermic
Explanation:Chemical reactions that release energy are called exothermic. In exothermic reactions, more energy is released when the bonds are formed in the products that are used to break the bonds in the reactants. Exothermic reactions are accompanied by an increase in the temperature of the reaction mixture. Energy is absorbed to break bonds. Bond-breaking is an endothermic process. Energy is released when new bonds form.
Answer:
Exothermic reaction
Explanation:
We have two types of chemical reactions, exothermic and endothermic reactions. Endothermic reactions refers to the one in which the reactants absorb the heat energy from the surroundings to form products.
An exothermic reaction refers to the one in which there is energy release in the form of heat and light.
Hence our required reaction is exothermic reaction.
write any three different between about dragonfly and helicopter
Natural vs. Man-Made: A dragonfly is a living creature, specifically an insect, belonging to the animal kingdom. On the other hand, a helicopter is a man-made machine, classified as an aircraft.
Method of Flight: Dragonflies fly using wings attached to their bodies, relying on their own muscle power. They have the ability to hover, glide, and change direction quickly. Helicopters, however, achieve flight through the rotation of their rotor blades, powered by engines. They can hover in mid-air, move vertically, and travel in any desired direction.
Size and Scale: Dragonflies are relatively small insects, typically measuring a few inches in length. Helicopters, in contrast, are much larger and come in various sizes, ranging from small personal helicopters to large commercial or military ones capable of carrying significant payloads.
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4. Is surface water considered to be ground water? Why, or why not?
Answer:
Surface water is a key component to the hydrologic cycle. Surface water is any body of water above ground, including streams, rivers, lakes, wetlands, reservoirs, and creeks. ... Water that seeps deep into the ground is called groundwater. Surface water and groundwater are reservoirs that can feed into each other.
Viruses have many things in common with living organisms, but they are NOT actually considered living. Why?
A They do not reproduce
B They are not made of one or more cells
C They do not contain genetic material
D They make people sick
The study of the cell is called cell biology. There are two types of cells on the basis of development and are prokaryotic cells and other are eukaryotic cells.
The correct answer to the question is option A.
What is a virus?A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea.According to the question, all the options are correct for the virus except option A. viruses can not able to reproduce by themselves due to the absence of their own genetic machinery.
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photosynthesis. a) State TWO reasons why you know this micrograph shows plant cells. b) Draw two whole cells of leaf tissue. Provide your diagram with labels and a heading. ) A leaf is a collection of tissues that perform a specific function. State whether a leaf is a system or an organ. Explain your answer. ure 16 below shows a) epithelial that line the human mouth and nerve cell that transmits perve
The majority of organelles are found in both plant and animal cells. Cells do not have a cell wall, a big central vacuole, or plastids like chloroplasts. Plant cells, on the other hand, do.
Why do leaves photosynthesis in the first place?A photosynthetic unit is a leaf. They are the plants' organs best suited and most adapted to photosynthesis for the following reasons: Chloroplasts, or cells containing chlorophyll, are found in leaves. Stomata found there aid in the gas exchange.
Explain the two phases of photosynthesis.First, in a process known as light-dependent processes, autotrophs absorb energy from the sun. The acquired solar energy is then transformed into potential energy in the second stage, known as light-independent and dark reactions, which is present in autotrophs in chemical bonds within macromolecules.
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Most articles pass right through the atom, this means that most of the atom is
Most articles pass right through the atom, this means that most of the atom is an empty space.
What is an atom?An atom is described as a particle that consists of a nucleus of protons and neutrons surrounded by a cloud of electrons.
Protons and neutrons make up the core nucleus of an atom, which is encircled by an electron cloud. In relation to the size of the atom as a whole, the nucleus is exceedingly small.
As a result, the electrons surrounding the nucleus are the primary target of interactions when particles or even light pass through an atom. The majority of the atom's remaining space, which includes the nucleus, is vacant.
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Which of the following describes a limiting factor of population size?
Birth rate
Death rate
Available land
Gestational period
Answer:
death rate
Explanation:
As death rate increases there's decrease in population
In the picture of the ocean floor, letter B marks what landform?
A)
rift zone
B)
ocean basin
o
continental slope
D)
continental shelf
Answer:B
Explanation:it’s call a ocean basin
Answer: The answer should be C) ocean basin
Explanation: You got your answers all mixed up, B should be continental slope and C should be ocean basin
A continuously growing population of alligators has a population size of 1,000 and an intrinsic rate of increase of r = 0.05 per year. Assuming that this rate of increase remains the same, about how long should it take for the population to reach 4,000?
Answer:
4 years
Explanation:
since the rate remains constant it will be neglected
per year(1 yr) = 1000
x years = 4000
cross multiply
1000x = 4000
x = 4
it will take approximately 4years for the population to reach 4000
i hope this helps
Which organism is likely to carry out the process shown in the diagram?
CO, + H,O
Heat
www
Chloroplast
Mitochondrion
MASS
Respiration
OA. Barn owl
OB. Mushroom
C. Alligator
-0₂
Sugar
ATP
Answer:
C
Explanation:
took the test
If thie dna is located in the nucleus of s skin cell the cell
Answer:DNA replication, transcription, and RNA processing all take place within the nucleus, with only the final stage of gene expression (translation) localized to the cytoplasm.
Explanation:
i hope this is right but if not I’m sorry
If you obtained your daily vitamin A from beta-carotene, how much would you have to consume from foods to meet the RDA of 700 mcg RAE (3 points)? List at least 2 symptoms of vitamin A deficiency AND toxicity (1 point). List at least 2 major foods of vitamin A and describe at least 3 health benefits of vitamin A for the body. (2 points)
Foods that contain substantial amounts of vitamin A include beef liver, spinach, broccoli and liver oil.
What is vitamin A?Vitamin A is a fundamental micronutrient that must be ingested in the diet in suitable amounts.
Leafy green vegetables (such as spinach) or orange vegetables (such as carrots) contain many vitamin A.
Vitamin A benefits include:
supports the immunityreduces ac_nesupports bonesLearn more about vitamin A here:
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In mice black fur is dominant to white fur. Neither parent of these have the recessive phenotype. what genotypes are the parent mice?
Absorbable sutures are preferred over non absorbable onesTrueFalse
Absorbable sutures eventually break down and are eliminated by the body via enzymatic degradation or hydrolysis. Some absorbable sutures are designed to degrade rapidly while others are treated to extend the absorption time. As absorbable sutures degrade, they lose tensile strength.
Answer: TRUE
amoeba and paramecium are prokaryotes give reason
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Amoebas, paramecia, and euglena are all considered eukaryotic cells because they contain membrane-bound organelles which include a defined nucleus....Hope it helps ~
what carries a gene from one organism into a bacteria cell?
Crossing over shuffles alleles on:_____.a. sister chromatids.b. different non-homologous chromosomes.c. chromosomes within different cells.d. different homologous chromosomes.d. none of the answers are correct.
Answer:
d
Explanation:
Crossing over shuffles alleles on non-sister chromatids of homologous chromosomes.
At the prophase I stage of meiosis, homologous chromosomes synapsed to form a four-chromatid structure known as tetrad. Exchange of chromosomal segments between non-sister chromatids of the tetrad then takes place, a process that results in the reshuffling of genes or alleles on the non-sister chromatids.
Hence, none of the answers is correct.
Correct option: d
As you study a cell under a microscope, you observe a nucleus and a large vacuole. What features would
you look for to decide what type of eukaryotic cell this is?
a. cell membrane and vesicles
b. cell wall and chloroplasts
smooth E.R. and rough E.R.
d. lysosomes and mitochondria
The features of eukaryotic cells are cell membrane and vesicles.
What are the characteristics of eukaryotic cells?Eukaryotic cells are defined as cells containing organized nucleus and organelles which are enveloped by membrane-bound organelles. Examples of eukaryotic cells are plants, animals, protists, fungi. Their genetic material is organized in chromosomes.
In addition to the nucleus, eukaryotic cells may contain several other types of organelles, which may include mitochondria, chloroplasts, the endoplasmic reticulum, the Golgi apparatus, and lysosomes.
Eukaryotic cells have the nucleus enclosed within the nuclear membrane. The cell has mitochondria. Flagella and cilia are the locomotory organs in a eukaryotic cell. A cell wall is the outermost layer of the eukaryotic cells.
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loss of mass and function?
A. Coagulation
B. Atrophy
C. Primary Union
Answer: I think B
Explanation: I am sorry if I am wrong tysm
-☈⊙⌘☿
what is the function of the Galaxy
Answer:
The luminosity function
In astronomy, the luminosity function gives the number of stars or galaxies per luminosity interval. ... Luminosity functions are used to study the properties of large groups or classes of objects, such as the stars in clusters or the galaxies in the Local Group.