Answer:
d
Explanation:
The most important confounding variable in this experiment is d) both a and c.
Confounding variables are factors that are not directly controlled or manipulated by the experimenter but can influence the relationship between the independent variable (calming nature scenes) and the dependent variable (patient anxiety). They can introduce alternative explanations for the observed results.
In this experiment, the age of the patient (variable a) and how crowded the waiting room becomes (variable c) are both potential confounding variables. Here's why:
a) The age of the patient: Different age groups may respond differently to calming nature scenes. For example, younger patients might have different levels of anxiety compared to older patients. Age-related factors such as life experiences, previous dental visits, or personal preferences may influence anxiety levels and responses to the nature scenes. If the age distribution is not controlled or accounted for, it could confound the relationship between the nature scenes and anxiety reduction.
c) How crowded the waiting room becomes: The level of crowding in the waiting room can create a different environment and affect patient anxiety levels. A crowded waiting room may increase anxiety due to the lack of personal space or increased social interactions. On the other hand, a less crowded waiting room might provide a more relaxed environment. If the level of crowding is not controlled or accounted for, it could confound the relationship between the nature scenes and anxiety reduction.
Considering both variables a and c as potential confounding variables is important to ensure that any observed effects of the calming nature scenes on patient anxiety are not solely attributed to age or waiting room crowding. Controlling for these variables or including them as factors in the experimental design or analysis can help isolate the true effect of the nature scenes on anxiety reduction.
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Which instrument would be best for measuring mass? *
O Scale that measures grams
O A Flask
O Scale that measures pounds
O A graduated Cylinder
O Measuring tape
Answer:
Scale that measure pounds
Answer:
Scale that measures grams.
Explanation:
Suggest why eating foods that contain a lot of catalase is unlikely to have any effect at all on preventing a person’s hair going grey.
Helppp
what is biological surplus
Answer:Biological Surplus is the amount of animals in a given population that are "above" the carrying capacity.
Explanation:
2. What is the original source of almost all the energy in most ecosystems?
(a) Carbohydrates
(b)Sunlight
(c) Water
(d)Carbon
3. Organisms need nutrients in order to
(a) Utilize hydrogen and oxygen
(b)Carry out essential life functions
(c) Recycle chemical compounds
(d)Carry out nitrogen fixation
4. Where in the cell are proteins synthesized?
(a) Mitochondria
(b)Vacuole
(c) Ribosomes
(d)Nucleus
5. The food producer within the plant cell uses energy from the sun and converts carbon dioxide and water into sugars. This sub-cellular structure is called the: (a) Vacuole
(b)Mitochondria
(c) Chloroplast
Answer:
2.-(b) Sunlight
3.-(b) Carry out essential life functions
4.-(c) Ribosomes
5.-(c) Chloroplast
Xác định giao tử của các kiểu gen sau Aa,AA, aa, AABB, AaBb,AAbb, AAbb, aabb, aabB, aaBB,
Answer:
Aa
Explanation:
organ means :
A. the smallest discrete quantity of some physical
property
B. a structure in an animal specialized for some
function
C. the study and classification of animal populations
D. a scale that measures the mental ability of a
person
Answer:
The answer is B that is the answer
WILL GIVE BRAINLIST
What does “the mean number of weeds in three parts of land” mean?
A. Someone determined the total number of weeds in each plot of land and divided that number by the number of people that live on each plot.
B. Someone determined the total number of weeds in each plot of land in calculated the average.
C. Someone determined the total number of weeds in each plot of land and wrote down the answer.
The basic building block of all organic compounds is a(n)
polymer
O isotope
O isomer
O monomer
Answer:
d) monomer
Explanation:
The nervous system and endocrine system shake hands as it were at the
A.) pituitary gland
B.) pineal gland
C.) adrenal gland
D.) hypothalamus
Answer:
D.) hypothalamus
Explanation:
which of the following works the same as a dynamo A . generator B.solar panel C.wind driven turbine D.torch battery
Answer:Wind turbine
Explanation:
Which of the following would increase the rate of an enzyme-catalyzed reaction?
Decreasing enzyme, decreasing substrate, decreasing cofactors
Decreasing enzyme, decreasing inhibitors, decreasing cofactors
Increasing enzyme, decreasing substrate, decreasing cofactors
Increasing enzyme, decreasing inhibitors, increasing cofactors
Answer: Increasing enzyme, decreasing inhibitors, increasing cofactors
Explanation:
Why? Well, we know that increasing how much enzyme is available is a good method to speed up the rate of an enzyme catalyzed reaction because we have MORE enzymes to deal with the substrates. We also know that cofactors are essential for widening the range of substrates an enzyme can catalyze. Cofactors also stabilize charge, so the substrate can fit into the binding site better.
the joint that permits the greatest range of mobility of any joint in the body is the ________ joint.
Answer:
The joint at the base of the thumb is an example of saddlejoint.
The answer is saddle joint
wla po akong kausaappppp
I don't know need explanation
is mitochondria required in aerobic respiration, anaerobic respiration or both?
Answer:
YES
Explanation:
BECOUSSE OF THE CELULAR RRESPIRATION
Can light waves travel through space? Explain.
Answer: yes light waves can
Explanation:
I don’t really know I remember theres one circumstance when they can’t and that’s because black holes can absorb them
which property distinguishes pioneer species from those that arrive later in ecological succession?
Answer:
B. Ability to grow on hard barren rock
Explanation:
What are disaccharides ,monosaccharides and polysaccharides??? if you don't know it please don't answer kindly
Answer:
Hey mate.....
Explanation:
This is ur answer....
Monosaccharides are carbohydrates that cannot be hydrolyzed to simpler carbohydrates. Disaccharides are oligosaccharides that contain two monosaccharide units. Polysaccharides contain a large number of monosaccharide units bonded to each other by a series of glycosidic bonds.
Hope it helps!
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What is the difference between bunnies', rabbits, and hares?
Answer:
Hares tend to be larger than rabbits, with longer hind legs and longer ears with black markings. While rabbits' fur stays the same color year-round, hares change color from brown or gray in the summer to white in the winter. Rabbits make their homes in burrows underground, while hares make nests above ground. The word bunny is often used to describe a baby rabbit; however, there is actually a different name for this. Finally, you can call a young child Bunny as a term of endearment. A bunny and a rabbit really are just two names for the same animal. A hare, on the other hand, is a completely different species. They may look similar, but hares are typically bigger than rabbits and have very different living and breeding habits.
How many loves does the pituitary gland have
A.)2
B.)3
C.)4
D.) none, it is a single unit
Answer:
pituitary gland has 2 lobes. :)
Miles wants to write the equation for photosynthesis. The villagram below represents one of the molecules in the equation
Which chemical formula rellects the diagram
Answer:
The molecule formed from photosynthesis is glucose, with the formula:
C₆H₁₂O₆
Explanation:
the process of making rna from dna is called and it occurs in the
Answer:
transcription
Explanation:
Answer:
i dk what its called but it occurs in the nucleolus
Explanation:
List in order the events of platelet plug formation.
a. Mass of platelets forms a platelet plug.
b. Platelets grow long spiny pseudopods.
c. Pseudopods contract and draw the vessel walls together.
d. Contact with collagen of a broken vessel or another rough surface toggle button.
e. Contact with collagen of a broken vessel or another rough surface
give examples of products containing ionic and covalent compounds that can affect human health and the environment.
Answer:
Table salt, Fluoride in toothpaste, baking soda, household bleach
Explanation:
hope this helps!
Look at pic ! Please type a paragraph based on your observations and your understanding about how heat moves (from
hot to cold), write a hypothesis that describes which material (aluminum foil OR
bubble wrap) will best insulate ice and slow the transfer of heat.
Answer:
ayyeee you go to k12 too in 9th grade
Explanation:
Explanation:
If solutions of Ni(ClO3)2 and NH4Br are mixed, how many precipitation reactions will occur?
A) 1
B) 2
C) 3
D) 0
Answer:
A
Explanation:
u
In which biome would you likely find primarily evergreens, such as pine, fir, and spruce?
Taiga
Temperate shrubland
Tropical rainforest
Tundra
Coniferous forests are a distinctive feature of the taiga biome, commonly referred to as the boreal forest or snow forest. With a total area of 17.1 million square kilometres (6.6 million square miles), or 11.5% of the land on Earth, it is the biggest terrestrial biome on the planet. Thus, option A is correct.
What is the main role of the Taiga biome?Conifers never lose their needles, unlike deciduous trees in temperate woods, which lose their leaves in the winter.Taigas have dense forest cover.
They house substantial species populations that are found nowhere else in the world and are among the top providers of ecosystem services in the world, including carbon storage and clean water.
Therefore, The taiga, also known as boreal forests, are the most northern forests on Earth, spanning large areas of Alaska, Canada, Northern Europe, and Russia.
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which term describes the male gametophytes of flowering plants?
Answer:
pollen grains
Explanation:
hope this helps you if it does please mark brainiest
The force that contributed to the formation of plans determines the motion of bodies in the solar system and pulls objects to the center of earth is called ______
Newtons first law of motion states that an object at rest will stay at rest until the force acts on it also states that an object in motion will stay in motion unless the force acts on the object newtons first law of motion is also known as law of ___
Answer:
Gravity
Law of inertia.
An experiment was performed to calculate the amount of energy in various food samples. Five grams of bread raised the temperature of 10 ml (10 g) of water by 40 °C. How much energy was released per gram of food (J)? The heat capacity of water is 4.2.
336 J
33 J
100 J
330 J
Answer:
330 j
Explanation:
explain adolsense and puberty
Answer:
Adolescence is the time between the beginning of sexual maturation (puberty) and adulthood. It is a time of psychological maturation, which a person becomes "adult-like" in behavior. Adolescence is considered to be the period between ages 13 and 19.
Explanation:
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