A track team captain thinks that eating breakfast and having a good night's sleep may affect the team's performance.

The track team decides to test if eating breakfast makes a difference in how fast they can run one mile.

They decide to split the team into two groups. One group eats breakfast two hours before running and the other group does not eat breakfast. The students also make a rule that both groups have to get a good night's sleep before they run. Is this rule necessary?

A. Yes, because the rule allows the team to only test one variable at a time, keeping everything else a constant.
B. No, because they can judge the effect of having breakfast even if the students do not get enough sleep.
C. No, because they can judge the effect of having breakfast only if some students do not get enough sleep.
D. Yes, because they can judge the effect of both breakfast and sleep if all students get enough sleep.

Answers

Answer 1

Answer:

I'm pretty sure the answer is A


Related Questions

Which theory suggests all living things are made up of a cell or cells? cell theory organismal theory

Answers

Answer:

Cell theory

Explanation:

The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.

The field of Astronomy is not related to technology
O True
False

Answers

Answer:

false

i hope this helps and goodluck!

Which of the following is caused by bad genes? *

Carcinoma
herpes
athlete's foot
vitaligo
bubonic plague

Answers

The answer is Vitaligo because all of the other answers are ones that you develop and not something you’re born with

A rabbit population is near the carrying capacity of its ecosystem. If the population density of rabbits in an area were to increase, what direct effect would it most likely have?

Answers

It could most likely lead to less food for herbivores to eat, predators could start flourishing off of the rabbits, and the food chain would be out of place.

What percent of energy is transferred from the sun to the level indicated? (3 points)
A. 50 percent
B. 100 percent
C. 90 percent
D. 10 percent

Answers

Answer:

10 Percent :)

Cells are the basic unit of life. Some cells are single-celled organisms and others
are specialized to do a specific function for an organism. Even though cells are
structurally different depending on the organism, all cells have this in common?
A. The presence of nucleic acid
B. The absence of a nuclear envelope
C. The presence of a cell wall
D. The absence of ribosomes

Answers

Answer:

A. The presence of nucleic acid

Explanation:

science is so confusing to me!

Select all answers that are correct.

If people have never observed matter (mass) to be created or destroyed, then using inductive reasoning, it would be logical to conclude that:


the known laws of science cannot account for the origin of mass
the amount (quantity) of mass in the universe has never changed
the mass of the universe must have created itself

Answers

Answer:

second one.

Explanation:

not sure but it's the only answer that goes with the other laws

In the outer layer of the sun, energy is transported outward by the rising of hot plasma and sinking of cooler plasma. This transfer is known as

Answers

Answer: Convection.

Explanation:

We have 3 types of heat transmission.

Radiation: Heat is transported as electromagnetic waves, this is not the case shown here.

Conduction: When we have two objects with different temperatures and we put them in contact, the system will want to go to equilibrium (both objects have the same temperature) so the hot object will give heat to the cooler object. We usually see this with solid objects.

Convection: It is the heat transfer due to the bulk movement of the molecules, so this need a material medium (it can not take place in solids, because the position of the molecules is fixed in the solids).

Then the rising of hot plasma and sinking of cooler plasma is convection.

What do eukaryotic cells have that prokaryotic cells do not?

Answers

Answer:

a nucleus

Explanation:

hey! the main difference between eukaryotic and prokaryotic cells is that eukaryotes have a nucleus, while prokaryotes do not.

please help me, 50 points

What type of bond are the arrows pointing to below in the picture


Answers

Thats is euther hydrogen bond or oxyegn bond. Im leaning towards hydrogen bond

Match each mineral property to the correct description.
crystal system
the ability to attract certain metals
cleavage
the number and angle of crystal faces
magnetism
the ability of a mineral to break along flat
surfaces
fracture
an irregular way of breaking apart
fluorescence
the ability to produce a visible glow

Answers

Answer: here you go hope this helps

Explanation:

Matching each mineral property to the correct description is:

crystal system

the number and angle of crystal faces

cleavage

the ability of a mineral to break along flat surfaces  

magnetism

the ability to attract certain metals

fracture

an irregular way of breaking apart

fluorescence

the ability to produce a visible glow

A mineral property are those things that make up or characterize a mineral. For example, things like crystal forms, luster, color, etc are all ways to recognize a mineral.

Read more here:

https://brainly.com/question/6736830

Consider the plant cells in the image below. What is a function of the cell structure that is labeled x?

Answers

Answer:

c) It provides support to the plant

Answer:c

Explanation:

function of cell membrane in muscle cells

Answers

Answer: The sarcolemma generally maintains the same function in muscle cells as the plasma membrane does in other eukaryote cells. It acts as a barrier between the extracellular and intracellular compartments, defining the individual muscle fiber from its surroundings

Explanation:

Which organisms synthesize carbohydrates, and in which cell organelle(s) does this synthesis occur?
a. animals in mitochondria
b. plants in mitochondria
c. plants in chloroplasts
d. animals and plants in mitochondria
e. animals and plants at ribosomes

Answers

Answer:

C

Explanation:

Green Plants are the main producers of starch as carbohydrate.In order to carry out this  special organelle Chloroplast are specially adapted  for this purpose,

Green plant are made up of Chlorophyll which are the green pigments that for trapping sunlight for the synthesis of starch to occur.

Photosynthesis is the process of synthesis of the starch.It involves the reaction of C02 with water  in the presence of sunlight  and enzymes to give oxygen as the byproduct, and Starch( carbohydrate) as the main product.

This process occur in two pathways the light dependent pathways and the light independent pathways,

Green plant and some organisms phytoplankons,algea are capable of producing starch  through photosynthesis because of the green pigment they possess.Therefore they are said to be Autothrophic.

Are mouse cells eukaryotic or prokaryotic?

Answers

Answer:

Eukaryotic

Explanation:

Which of the following is true for a water molecule

Answers

Answer:

The oxygen atoms have electrons more often than hydrogen.

Explanation:

[A] It has a bent-shaped structure
Notes: The water molecule has a bent-shaped structure. The bond angle is 104.5° and it is a polar solvent. Infact, water is known as a universal solvent

What did Oparin call the mixture of carbon-based molecules that would eventually from life ?

Answers

Answer:

Earth's primordial soup

Explanation:

Alexander Oparin was a Soviet biochemist who proposed theories for the origin of life through a book he called "The Origin of Life". He claimed that life on earth came about as a result of a gradual chemical evolution which is a mixture of carbon-based molecules that he called Earth's primordial soup (or sometimes called "organic soup").

What kind of joint is pictured in the diagram shown? Need Answer ASAP

Answers

Answer:

b  A moveable moveable joint joint that that allows allows back back and and forth forth movementmovement

Explanation:

A moveable joint that allows back and forth movement. Therefore, the correct option is B.

What is moveable joint?

A synovial joint, commonly referred to as a movable joint, allows for a variety of motion between bones. Limbs and other areas of the body that require movement have movable joints.

These joints have a synovial membrane that secretes synovial fluid, and they are enclosed in a capsule of connective tissue. This fluid helps lubricate the joint and lower friction as the bones move in closer proximity to each other.

Ball-and-socket joints, pivot joints, saddle joints and gliding joints are some examples of movable joints. Different types and ranges of motion are possible with each type of joint.

Therefore, the correct option is B.

Learn more about movable joints, here:

https://brainly.com/question/29313671

#SPJ2


Collisions between molecules cause diffusion.
True or false

If false then what does cause diffusion

Answers

Answer:

True

Explanation:

The collisions between the particles cause them to spread out and move away from each other.

find all the hidden words related to earthquake in the grid below​

Answers

you didnt upload a picture so how are we supposed to see a graph?
uh sorry but I don’t see no grid! :v

A location's weather depends on...
Question 1 options:
A. temperature
B. clouds
C. precipitation
D. all of the above

Answers

Answer:

D

Explanation:

its obvious

Answer:

D all of the above

Explanation:

The temperature is the heat or cold in the weather.

The clouds can change the temperature in the weather.

Precipitation is what most people think of when you say weather.

Rashad hears a loud noise outside. When the sound reaches his ears and travels to the brain to be recognized, which of the following is true about how this happens A) information will only travel to the frontal lobe B) information will first travel to the thamalus and then to wernickes area C) information will travel only to the temporal lobe D) information will first travel to the thalamus and then to the temporal lobe

Answers

Answer:

D.  information will first travel to the thalamus and then to the temporal lobe

Explanation:

What field of forensics do medical coroners work in?
O Forensic sociology
O Forensic pathology
O Forensic entomology
O Forensic psychiatry

Answers

the answer should forensic pathology :) my apologies if wrong but that should be it

Answer:

THE ANSWER is B

Explanation:

i need to poop

Dependence and Addiction are the
same thing?
a. True
b. False​

Answers

Answer:

b

Explanation:

one is a necessity, the other is a struggle

A cell membrane has permeability, which means that the membrane:

Answers

Answer:

transport proteins are specific and selective for the molecules they move, and they often use energy to catalyze passage.

Explanation:

I barley know what your trying to say

The _____ is a process at the top of the femur: A. calcaneus B. lateral greater trochanter C. tarsus D. fibula

Answers

Answer:

PART C I THINK SO

Explanation:

i believe it’s b , i searched it up but not sure

why did samy say the f word i told him so many times and still says it

Answers

who is samy? and i’m so confused please explain more

How many millimeters are equal to 3.46 meters

Answers

Answer:

3460

Explanation:

Answer:

3460

Explanation:

Example of reproduction

Answers

Answer:

a deer giving birth to a baby deer

what are thylakoids? I will give BRAINLIEST!!

Answers

Answer:

each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.

Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. Thylakoids consist of a thylakoid membrane surrounding a thylakoid lumen. Chloroplast thylakoids frequently form stacks of disks referred to as grana.

Explanation:

Answer:

They are membrane-bound compartments inside chloroplasts (the food producers of the cell) and cyanobacteria (group of photosynthetic bacteria).

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