Answer:
Predators eat prey. When they do so, they are keeping the population or number of prey in check. Now, a lot of prey are either herbivores or omnivore, meaning plants are in their diet. If there were to be no predators, an absurd overpopulation of prey would arise. This would cripple the growth of young trees by the prey feeding on them, and overall would over-run their habitat, making the food sources scarce. When the food source gets so low they will die out or continue to move on to other surrounding areas and create the same problems.
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The cells of a grasshopper contain DNA. The grasshopper could be alive because it displays which sign of life?
A.response to the environment
B.
information system
C.
complex chemical activities
D.
reproduction
Answer:
B.)information system
i hope it's helpful
Question 2 (Matching Worth 4 points)
(01.02 LC)
2
Match each term with its description
Match
Term
B
Biosphere
Definition
A) A place in an ecosystem where an organism normally lives
D
Ecosystem
B) Includes all living things and the areas in which they live
С
Biome
C) A large geographical area classified by its climate and the plant
and animal life within it
A
Habitat
D) Includes all living things functioning together with the physical
factors of their environment
s Question
Answer:
b
c
d
a
Explanation:
The matching of each term with respect to its description is as follows:
Biosphere: is a place in an ecosystem where an organism normally lives. Ecosystem: includes all living things functioning together with the physical factors of their environmentBiome: is a large geographical area classified by its climate and the plant and animal life within itHabitat: includes all living things and the areas in which they live. What is an Ecosystem?An ecosystem may be defined as a place or an area where members of different species live together and interact with one another for the purpose of food, shelter, and space.
The Ecosystem comprises all biotic and abiotic factors of any geographical location. The Biosphere only includes the living forms where they efficiently live and play their roles. Habitat is the area where a particular type of organism is best adapted due to natural selection.
Therefore, the matching of each term with respect to its description is appropriately described above.
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A scientist sets up an experiment to see how colored lights affect the height of plant growth. He grows one group of plants in full sunlight, one group under red lights, one group under blue lights, and one group under green lights. All the plants are exactly that same type and all receive an equal intensity (brightness) of light. At the end of the experiment he measures all the plants. What is the dependent variable?
A) The intensity of the light
B) The color of the light
C) The height of the plant
D) Sunlight
Answer:
C) The height of the plantExplanation:
Dependent variable - is the variable that can not be manipulated and the one that's being observed.
[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
In the early 1900s toxic substances such as ammonia (NH3) and sulfur dioxide (SO2) were used in
1
refrigerators as
Answer:
propellants
Explanation:
they were used to make aerosols sprays in aluminum spray cans
4. Estimate the size of the outlined (yellow) onion cell under high power (40x). Use the dFOV values calculated from question no. 3. 10 points
The following formula is useful to determine the size of the cell ⇒ Size of the object = FOV / Fit number = dFOV / Fit number. If you have this data, you can estimate the size of the onion cell. According to the values we used, the estimated size of this onion cell is 112 μm.
-----------------------------------------------
Cells are too small to measure their sizes, so to know their actual size, we can make mathematical estimations to know their sizes, or we can use software programs. In this case, we are estimating their size using the following formula,
Size of the object = FOV / Fit number = dFOV / Fit number
Size of the object = size of the cellFOV = eyepiece (mm)/objective magnification Fit number = The number of times the object -cell- fits in the field of viewTo answer this question, we will replace the terms in the given formula.
→ First, we will get the FOV value. From references, we can assume that
under 4X ⇒ FOV = 4.5 mmunder 10X ⇒ FOV = 1.8 mmunder 40X ⇒ FOV = 0.45 mmYou can also calculate the FOV by using a millimeter paper or rule.
Note: We will use these values to replace terms in the formula, but you can use the dFOV value calculated in question no. 3.
→ Second, we will count the number of cells that fit the field. We can see about four cells across the field of view.
→ Finally, we will replace the terms in the formula.
Size of the object = FOV / Fit number
Size of the object = 0.45 mm / 4
Size of the object = 0.112 mm
Since we generally use μm when referring to cell sizes, we need to multiply 0.112 x 1000 to get the size of the cell expressed in μm.
Size of the cell (μm) = 0.112 mm x 1000 = 112 μm
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hurry50points
Explain the theory of plate tectonics and how they have changed Earth’s surface over time. Include the role of plate tectonics in the creation of landforms. suort awser
Answer:
The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth's mantle below the earth crust...Explanation:
The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth's mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years... please marks me as brainliests for my effort....please help
Why would bacteria, plant and animal cells need to be different?
Answer:
Because each the cells would have different functions on different organisms.
Explanation:
Bacteria cells are usually prokaryotic which means that it is only composed of one cell. The single cell already has everything it needs so therefore, it isn't as complex as plant and animal cells.
Plants are autotrophs and produce their own food through photosynthesis. Plant cells would have a large vacuole, cell wall, chloroplasts, unlike animal cells.
Animal cells have all the cell organs that plant cells except a large vacuole, cell wall, and chloroplasts. Animal cells also have lysosomes in which plant cells don't.
Please help! How does the circulatory system work at the tissue level?
A) The heart pumps the blood.
B (Blood cells carry nutrients.
C) Nutrients are delivered throughout the body.
D) Cardiac muscle contracts.
Answer:
B
Explanation:
The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products.
Answer:
The circulatory system work at tissue level by following points
=nutrients are delivered throughout the body
what is corona virus and its symptoms?
Answer:
fever, cough and shortness of breath. In more severe cases, infection can cause pneumonia, severe acute respiratory syndrome and sometimes death.
Explain how observation, interpretation, and explanation are important to the study of science.
Answer:
Observation is essential in science. Scientists use observation to collect and record data, which enables them to construct and then test hypotheses and theories. Scientists observe in many ways – with their own senses or with tools such as microscopes, scanners or transmitters to extend their vision or hearing.
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differentiate between Angiosperms and gymnosperm
Answer:
Angiosperms are vascular plants bearing the seeds in fruits or mature ovaries whilst gymnosperms are other types of the plant which bears the seeds directly on the sporophylls but without any cover.
Explanation:
Examples of gymnosperms include cypress,pine, redwood, spruce and ginkgo.
Examples of angiosperms include apple, banana,peach, cherry and orange.
Also, angiosperms are seeds producing flowering plants whose seeds are enclosed within an ovary.
Gymnosperms are also seeds producing non flowering plants whose seeds are unenclosed.
Hope it helps.
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From memory List the characteristics of life
Answer:
Explanation:
There's a nice mnemonic: mrs gren
movement
reproduction
sensitivity
nutrition
excretion
respiration
growth
Answer:
have cells
use energy
reproduce
respond to the environment
grow and develop
Explanation:
5. What are two main things that are unique to the Troposphere?
A)people live in this layer and the weather occurs here
B)meteors burn up and it's the coldest layer
C)the International Space Station Orbits in this layer and it has the highest
temperatures
D)none of the above
Answer:
The two main things are:
A) people live in this layer and the weather occurs here
B) meteors burn up and it's the coldest layer
Sign an experiment.
A: John Smith has been hired by the city of Virginia Beach to investigate the recent increase in shark attacks off
the resort's coast. The resort has also heard from its guest recently an increased number of elephant seals that
are seen at the beach. Elephant seals are highly migratory and move with the seasons. He has a budget of
$40,000, a 25 foot boat, and three graduate student assistants to help him. A helicopter has also been donated by
a local television station, should he need one.
1. List 2 hypotheses John and his crew may have come up with for the recent shark attacks.
a. If
then
b. If
then
2. Pick one of the two hypotheses and determine the following:
a. Control Group:
b. Experimental Group:
c. Dependent Variable:
d. Independent Variable:
3. What type of data do you think John will collect (What will be the results of the experiment)?
4. What conclusions will John be able to make from the results of the experiment?
The answers to the questions required for the design experiment above are :
If shark attack are related to the number of elephant seals in an area, then shark attack will increase as the number of elephant seal increases If shark attack are unrelated to number of elephant seal in an area, then shark attack is unaffected by increase or decrease in number of elephant seal. The Control Group : Beaches or areas where elephant seals aren't present or period of the year when there are no elephant seal at the beach. The Experimental group : Beaches where varibale portions of elephant seals are found (area with high, medium or low). The Dependent variable : Number of shark attacks The Independent variable : The different number of elephant seals found. Data to be collected include : The number and type of elephant seals found at various beaches and the number of shark attacks recorded at the various points. John will be able to deduce if the number of elephant seals and number of shark attacks recorded corded are related.The hypothesis of an experiment is a proposition which requires experimental testing in other to establish it's validity.
The Control Group refers to a portion of the subject which aren't given or exposed to the treatment used in an experiment.
The Experimental group are the portion of the subjects which are subjected to the treatment condition.
The Dependent variable is the measured variable is changes as the independent variables are tweaked.
Independent variable is the predictor variable, it causes a change in the output of the dependent variable.
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A truck start to move from rest.If is acceleration by 2m/s/s calculate the final velocity of 20 second.
Explanation:
v2 = v1 + at
v1 = 0
a = 2m/s
t = 20
v2 = 2 ×20 = 40 m/s
Which of the following factors decreases blood flow?
Decrease in blood viscosity
Increase in blood pressure
Increase in the resistance of a blood vessel
Increase in overall blood volume
Answer:
increase in the resistance of a blood vessel
Explanation:
if there's more resistance then it's decreasing. like friction
What are the rules for writing a hypothesis?
Are male butterflies and moths the same species?
Answer:
Explanation: No they are not.
Drag each tile to the correct location. Match each type of plant to the correct image.
Answer:
How is anyone supposed to answer that when there’s no pictures to match so we can answer it
Explanation:
Ph, Acids and Bases Quick Check
Which statement best describes the difference between a substance with a pH of 3.0 and a substance with a pH of 6.0? (1 point)
O The substance with the higher pH has twice as many hydrogen ions per volume of water.
The substance with the lower pH has twice as many hydrogen ions per volume of water.
The substance with the higher pH has 1,000 times as many hydrogen ions per volume of water. O
O The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.
Answer: c
Explanation: 3.0 is 1,000 times as many ions
The statement that best describes the difference is ; The substance with the lower pH has 1000 times as many hydrogen ions per volume of water. ( D )
Given that the substance have pH ; 3 and 6
To prove the statement above we will make use of the pH formula
pH = -log(H⁺)
for substance with pH = 3
3 = - log(H⁺)
H⁺ ( hydrogen ions ) = 10⁻³
for substance with pH = 6
6 = - log(H⁺)
H⁺ ( hydrogen ions ) = 10⁻⁶
Hence we can state that the substance with the lower pH has 1000 times as many hydrogen ions per volume of water
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Visualize It!
6 Identify Name three examples of matter found in
this photo.
Answer:
bag, human beings and bridge
Describe how scientific investigations lead to new scientific questions.
Answer: if new investigations occur, new questions would have to be asked to find out the things that are being researched.
Explanation:
Which change of state is shown in the model?
A. condensation
B. evaporation
C. sublimation
D. deposition
