Answer: An amoeba is a microscopic protozoan that is found in both terrestrial and aquatic environments. Amoebas are at the bottom of the food chain, providing nutrients for other living things. Humans are members of the primate family and are the most intelligent living things on Earth.
Which of the following is a main difference between prokaryotic and eukaryotic cells?
A.eukaryotes are smaller than prokaryotes
B.eukaryotes do not have organelles
C.prokaryotic cells lack a membrane-bound nucleus
D.prokaryotes do not have ribosomes
Answer:
C
prokaryotic cell's DNA just floats around in a cluster
A personal trainer thinks her clients get better workouts and are stronger if they listen to music while working out. Over the next week, she divides her 20 clients into two groups of 10. For the first group, she plays music and sees if they can lift a barbell weighing 50 lbs. For the second group, she repeats the test but does not play any music. All 10 members of the music group could lift the barbell, but only 7 members of the no music group could lift the barbell. She concludes that her hypothesis was correct and decides to always play music for her clients.
Which group was the control group?
Answer:
The correct answer is: the group of 10 people that lifted the barbell with music is the control group.
Explanation:
The personal trainer made an experiment to test her hypothesis. When experiments are being made, is common to have a control group and an experimental group.
The control group is the one that is subjected to the usual conditions, the group that shows what normally happens. The experimental group is the opposite, this group is observed while it goes through an unusual condition that may impact how they perform in the task observed.
The personal trainer thinks that playing music for her clients is of benefit to them, so we can assume that she always plays music during the workouts, which means that the control group is the one that is listening to music while lifting a barbell. The group that worked out without music is the experimental group because they were the ones that performed that activity with a change in their normal environment.
Which of the following is NOT part of the cell theory? *
All living things are made up of one or more cells.
Cells come from other cells.
The cell is the basic unit of life.
Cells are made of organelles.
Answer:
Cells are made of organelles.
Answer:
cells are made of organelles
Explanation:
because it is why the cells has different kinds
A student tossed a coin five times and observed results of four tails and one head. He concluded that when a coin is tossed, there is an 80% chance of getting a tail and a 20% chance of getting a head. The conclusion would be more valid if? A only two tosses of the coin had been used B the weight of the coin had been used C a greater number of tosses had been used D the surface the coin had landed on had been taken into consideration
Answer:
B
Explanation:
Which expression best describes the amount of biomass transferred
from the producer level of this pyramid to the tertiary consumer level? (PLEASE ANSWER CORRECTLY AND QUICK)
a > 10% (equal to)
-
b <50% (equal to)
-
c >100%
d <1%
Basalt is dark in colour. Give reason.
Answer:Basalt is usually dark grey to black in colour, due to a high content of augite or other pyroxene minerals, but can exhibit a wide range of shading.
Explanation:
Some basalts are quite light-coloured due to a high content of plagioclase, and these are sometimes described as leucobasalts.
What information cannot be studied effectively using human torso models? I. the approximate sizes of organs II. the textures of organs III. the interrelationships of organ functions IV. the positions of organs within the body
Answer:
II. the textures of organs
Explanation:
A human torso model is designed to be as accurate as possible so that students/researchers can understand the inner workings of the body. Therefore, the organs have been designed to be the same size of an actual human being of that stature, while also being in the correct position within the body to better understand the interrelationships between the organs. The only thing that is not accurate in these models is the texture of the organs as most are smooth plastic unlike the actual organs.
Answer: ll and lll only
Explanation:
What type of weather is Idaho experiencing? (Northwest United States)
A Clear skies and sunny weather due to a low pressure system b Heavy precipitation and clouds due to a low pressure system c Heavy precipitation and clouds due to a high pressure system d Clear skies and sunny weather due to a high pressure system
Answer:
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two.
Explanation:
THIS IS A PSYCHOLOGY QUESTION.
Describe the major theories for the purpose of sleep. Why do we sleep?
3 to 4 examples of biological enzymes
Answer:
1.Lipases
2.Amylase
3.Maltase
4.Trypsin
What color is blood while it’s in your body ?
Answer:
Red, shade of red may depend on the oxygen level in it.
Explanation:
Answer: Dark red for veins, bright red in artery
Explanation:
What is the meaning in life it seems so pointless??
Answer:
To be happy
Explanation:
Honestly If you are happy then life is good, what do you crave in life... go after it
Why does a pollutant end up multiplied as it travels up the food chain from producers to consumers?
Answer:
This is due to bio magnification.
Explanation:
When there is a gradual increase in concentration toxins(pesticides) in the tissues of organisms progressively in the food chain,the term for describing this is called -bio magnification.
The progressive multiplication in the concentration of these toxins may be due to non-biodegradable nature of the toxins,which are absorbed into the tissues of mostly the producers from the environment faster than they could metabolized by the body.
.Therefore these could not be removed by the producers, during excretion and respiration,and hence build up progressively upwards in the consumers.
A typical example is the phytoplankton which absorb toxins from sea water and accumulate this in the body.The build could not be ,metabolize by the body system,and is transferred to the zooplankton along the food chains when they feed on the phytoplanktons- this is Bio magnification.What would be the impact of not having mutualistic relationships in ecosystems
The LESS genetically diverse a population is, the better it can respond to environmental stressors. True or False?
False is the answer as it increases the risk of extinction
Which element has two energy levels magnesium or carbon?
Which of the following is the best definition of a system?
A. The form and arrangement of an object
B. a group of connected or related things?
C. Something that takes up space and has mass?
D. A collection of organs?
Answer
answer would be d
Explanation:
if correct brainlist?
Answer:
B. a group of connected or related things?
Explanation:
A system must have some form of relationship between the components inside of it. All these components work together to do a certain task or to run efficiently.
For example, let's take the court justice system. Inside the system is broken down into a range that can go from small claims court to the Supreme Court of the United States. This system is to ensure that their is not only a smaller burden on the supreme court to be able to take care more of national & international claims, but also so that if a citizen feel that they have a unfair ruling, they may bring it up to a different court that may not have local preferential to a certain degree.
All parts of a system is connected or related to each other, either as a cause, and effect, or a solution.
~
what was the independent variable in this experiment
Explanation: the actual thing that you are testing and changing in your experament can also be called the manipulated variable hope this helps
Based on your understanding of how producers make food, make a prediction about the relationship between sunlight and carbon dioxide uptake by a plant.
Answer:
photosynthesis
Explanation:
True a False/ a theory is a scientific idea that has been proven to be true.
Answer:
No,it has to be proven true its not already true
Explanation:
It has to be proven true,it can't be true becuase someone said it was without any proof.
the carbon used in photosynthesis comes primarily from the air or surrounding aquatic environment
a. true
b. false
Answer: true
Explanation:
What are some possible future career fields in environmental science?
Answer:
Environmental science is a branch of science that deals with biological and chemical issues in the environment and establish initiatives for a healthy environment.
Environmental science is a vast subject and comes with many future career fields, some of them are as follows:
Environmental Scientist: The responsibility of environmental scientists is to analyze samples of air, soil, water, food and other materials and informing about health risks and environmental hazards.Environmental Lawyer: Environmental Lawyer deals with the technical understanding of environmental issues and argues for the benefit of environment.Environmental Engineer: Environmental Engineer design projects on the basis of environmental protection.Zoologist: Zoologist studies the behaviour of animals and their interaction with the natural environment, human beings and other animals.Hydrologist: Hydrologists analyzes the impact of the environment on the quantity and quality of water and the influence of water on the environment.Thus, there are many career fields in environmental science.
Environmental science is a branch of science which deals with both biological and chemical factors reside in the environment and establish a healthy environmental initiatives.
What is the application of environmental science?Environmental science is a vast subject related to environment and its components, it mainly deals with climates to animal survival, to air quality, and much more
It shows its effect on Public Health, Land Management, Waste Disposal and Pollution, Overpopulation, Water, Deforestation, Ecosystems, Endangered Species, Climate Change
Some carrier option include, you can opt for an Environmental Scientist where the role should be analyze samples of air, soil, water, food and other materials.
You can choose for Environmental Lawyer mainly deals with the understanding of environmental issues and argues for the benefit of environment.
Environmental Engineer is another field where you can design projects for environmental protection, as a Zoologist where you can study behavior of animals and their interaction with the natural environment,
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Increasing the rate of an impulse is the function of the_________.
A myelin sheath
B. axon terminals
C. cell body
D. axon
Answer:
Myelin sheath
Explanation:
Increasing the rate of an impulse is the function of the myelin sheath. Thus, the correct option is A.
What is Impulse?The Impulse may be characterized as an electrical signal that can be transmitted along a nerve fiber in response to an external or internal stimulus.
The Myelin sheath increases the rate of nerve impulses. This is because it insulates the part of axons and reduces the chances of any disturbance in between due to the assemblage of voltage-gated sodium channels.
Therefore, increasing the rate of an impulse is the function of the myelin sheath. Thus, the correct option is A.
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15 points+ brainliest!! please help i need this done asap :(!
What is one observation that could be made to support the idea that two rock layers
are the same age?
A.layers with different fossils
B.layers of equal density
C.layers made of the same chemicals
D.layers with similar fossils
Which of these plant cell structures is also found in a prokaryote?
Answer:
D. Cell wall
Explanation:
Cell wall is also present in prokaryotes it is made of peptidoglycan layer.
The night sky is filled with images of wild animals. Which animal is the circled constellation named after?
scorpion
serpent
snake
salamander
Answer:
Scorpion
Explanation:
Answer:
A
Explanation:
The hindbrain is mainly responsible for:
A. communication between all parts of the brain.
B. logical thought and language.
C. processing sensory input.
D. basic life functions and muscular coordination.
Answer:
basic life functions and muscular coordination.
Explanation:
Can someone please help I’ll give brainliest!
The questions are:
1. What are the constants (variables that stay the same- also called controlled variables)?
2. What is the independent variable ?
3. What is the dependent variable?
4. What flaw in the design of the experiment can you find ? Explain .
5. What hypothesis do you think the scientists are trying to test?
Answer:
Explanation:
1) The constants: hours of lgiht per day, their food, wheel for exercise, and cage size
2) Independant variable: temperature
3) Dependant Variable: weight and length
4) Flaw: The mice groups have different amounts of mice. Group 1 has three, group 2 has four and group 3 has two. All groups should have the same number of mice, in this case three mice per group.
5) Does the temperature of a mouse's cage affect their weight and length?
Hope this at least helps!
What must happen before a chemical reaction can begin
- the activation energy must be exceeded
- the activation energy must be reached
-the concentrations of products and reactants must be equal
- the concentration of reactant molecules must be reduced
Answer:
its B
Explanation:
The incident that happen before a chemical reaction can begin the activation energy must be reached. Thus, option B is correct.
What is activation energy?
The extra energy is the minimum amount of extra energy which required by reacting molecule to convert into the product.
Factor at which activation energy depends are as follows:-
1: Activation energy depends upon the nature of reactant if reactant is ionic then required activation energy is less and if reactant is covalent then required activation energy is high.
2: Nature of catalyst if catalyst is positive then required activation energy is less and if catalysts is negative then required energy is high.
3: Activation energy doesn't depend on pressure, temperature, volume etc.
Temperature is one the important factor at which any reaction is depend. In any reaction if temperature is increases the rate of reaction is increases and if temperature is decreases the rate of reaction is decreases.
Here, is the Arrhenius Equation which shows the temperature dependence of the rate of a chemical reaction.
k=Ae^−EaRT
Where,
k= rate constant of the reaction
A= Arrhenius Constant
Ea= Activation Energy for the reaction (in Joules mol^-1)
R= Universal Gas Constant
T= Temperature in absolute scale (in kelvins)
Therefore, The incident that happen before a chemical reaction can begin the activation energy must be reached. Thus, option B is correct.
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