Answer:
they use carbon 14 which has a half life of 5730 years
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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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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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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what happens if an organelle stops working
if an organelle stops working the cell will no longer be able to excrete proteins or other molecules.
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.
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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A virus isn’t technically classified as a living thing.
Answer:
It's true cause it got no nucleus
Explanation:
[tex].[/tex]
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:
What are proteins made of? *
sugars
glycerol and fatty acids
amino acids
nucleotides
Answer: Amino acids
Explanation:
The building blocks of proteins are amino acids. They are small naturally-grown molecules that include an alpha carbon atom connected to an amino group, a carboxyl group, a hydrogen atom, and a variable component.
Side Chain
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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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
Which of these correctly demonstrates the biomolecule with its function?
A)
steroids; separate the cytoplasm from the environment
B)
waxes, prevents water loss and repels water
c)
triglycerides; make up sex hormones
D)
phospholipids, store energy
Answer:
B) Waxes, prevents water loss and repels water
Explanation:
Waxes, steroids, phospholipids, and triglycerides are types of lipids. All of them are made of Hydrocarbon chains that are hydrophobic.
Triglycerides (fats) - Storage molecules for the body's energy
Steroids - Sex hormones and cholesterol
Phospholipids - Cell membrane (Separates cytoplasm from the environment)
Therefore, Answer choice B) Waxes, prevents water loss, and repels water, is the only answer that correctly matches with the provided answers.
1. Write the order of the steps in the scientific method (you should have 7
steps):
Answer:
Ask a question
preform research
establish your hypothesis
test your hypothesis
make an observation
analyze results and draw a conclusion
present the findings
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:
HELP PLEASE!!!!!
Compare a virus to a unicellular organism. (1 point)
O Viruses need energy, unicellular organisms do not need energy.
O Unicellular organisms have a cell membrane made from a lipid bilayer, viruses have a protein coat
O Viruses reproduce through asexual reproduction; unicellular organisms need a host cell,
O Neither unicellular organisms nor viruses respond to stimuli.
Answer:
differences : Viruses need energy while unicellular organisms donot need energy
Unicellular organism has cell membrane but virus has protein coat.
Unicellular organisms have a cell membrane that is made from a lipid bilayer whereas viruses have a protein coat which is called capsid. Unicellular organisms reproduce through asexual reproduction whereas virus need a host cell for their survival because virus use the cell engine to extract food for their survival so it is conclude that unicellular organisms have cell membrane but virus has protein coat.
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Although we think of land when we hear the word biome, there are also aquatic biomes. The abiotic factors that
influence life forms vary with location within ocean systems. Oceanographers divide the ocean into five broad
vertical zones as seen in the chart above. Compare the abiotic characteristics of the five zones.
Although we think of land when we hear the word biome, there are also aquatic biomes. The abiotic factors that
influence life forms vary with location in the ocean. Oceanographers divide the ocean into five broad vertical zones as
seen in the chart. Compare the abiotic characteristics of the five ocean zones. Which of these conclusions about life
forms found in the zones is supported by the information in the chart?
)
A)
Because of the severe abiotic conditions, there are no life forms found in
the hadalpelagic zone.
B)
The epipelagic zone is the only zone of the five zones where visible light
and algae can be found.
The mesopelagic zone hosts a diverse zooplankton community instead of a
phytoplankton or algae community and virtually no fish species.
Because there is no light in the abyssal zone, organisms feed on each other
or the dead organic material, detritus, that falls into the abyssal zone from
above.
D)
Answer:
B) The epipelagic zone is the only zone of the five zones where visible light and algae can be found.
Explanation:
A mesopelagic region has many different types of fish inhabit this twilight zone.
There are several organisms in the hadalpelagic zone.
The "abyssal zone" issue is meaningless because fish feed in all zones.
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
trying to turn this in. Could use the help ASAP!❤️
1.) Which statement correctly describes the relationship between the volume of a gas and it’s temperature, in Kelvin, assuming pressure is held constant?
A.) The relationship is directly proportional; as temperature increases, volume decreases in the same way.
B.) The relationship is inversely proportional,
As temperature increases, volume decreases in the same way.
C.) The relationship is directly proportional, as temperature increases, volume increases in the same way.
D.) The relationship is inversely proportional, as temperature increases, volume increases in the same way.
2.) which statement explains the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant
A.) an increase in pressure causes particles to move farther apart, decreasing the volume
B.) an increase in pressure causes particles to move farther apart, increasing the volume
C.) an increase in pressure causes particles move closer together, decreasing the volume.
D.) an increase in pressure causes particles to move closer together, increasing the volume.
3.) The ideal gas law is represented by PV = nRT. as volume is held constant and the temperature increases, how would the pressure be expected to change
A.) it will remain constant.
B.) it would decrease.
C.) it would increase
D.) it would become zero
4.) when the pressure of gas decreases, which quantity will increase, assuming all other variables are held constant?
A.) R
B.) n
C.) T
D.) V
5.) two balloons hold two different gases. The gases are held at the same pressure, volume, and temperature. Which quality can difference between the two gases?
A.) The molar volume of each gas
B.) The mass of each gas.
C.) The gas constant of each gas.
D.) The number of moles of each gas
Answer:
1. The relationship is directly proportional; as temperature increases, volume increases in the same way.
2. An increase in pressure causes particles to move closer together, decreasing the volume.
3. It would increase.
4. V
5. The mass of each gas.
Just took it
Remember that the equation for the ideal gas is:
P*V = n*R*T
Where:
P = pressure
V = volume
n = number of moles
R = constant of the ideal gases.
T = temperature.
1) If the pressure is held constant (we also assume n is constant, because usually, the number of moles does not change).
Then we can write
V = (n*R/P)*T
and (n*R/P) is a constant.
Then the above relation is a proportional relation.
So the correct option is C: The relationship is directly proportional, as temperature increases, volume increases in the same way.
2) If the pressure increases and the temperature is held constant, then the equation:
V = (n*R/P)*T
can be used.
Now the temperature is constant, so we can write this as
V = (n*R*T)/P
Where now (n*R*T) is a constant.
So now we have an inversely proportional relation, when P increases, the volume should decreases. And a decrease in volume happens because the molecules move closer together, so the correct option is C:
"an increase in pressure causes particles move closer together, decreasing the volume."
3) Now the volume is constant, then we can write:
P = (n*R/V)*T
Exact same thing as in the first case, this is a proportional relation, so if the temperature increases, also does the pressure.
The correct option is C again.
4) If the pressure decreases then temperature also decreases, as we saw above.
And as the temperature decreases, the volume increases, as we saw in point (2), then the correct option is D, i the pressure decreases, the volume increases.
5) We have two different gases with the same values of T, V, and P.
By the equation:
P*V = n*R*T
And knowing that R is a constant, we can see that n should also be the same value for both gases.
Then the molar volume of each gas, V/n, is also the same.
Finally, the only thing that can be different in the gases is the thing that does not appear in the equation, and that is density/mass. So we can conclude that the gasses have different masses (thus different density, as they have the same volume)
Then the correct option is B; the mass of each gas.
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Are male butterflies and moths the same species?
Answer:
Explanation: No they are not.
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
What are the rules for writing a hypothesis?
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....HELP!!! TIMED TEST!!! The chart shows four articles read by the students in a science class. Which claim has the greatest support?
A The Journal of Health: smoking can cause adverse effects on the lungs
B The Daily News: Vitamin supplements help increase food absorption
C and D look untrustworthy.
Answer:
this is the answer
Explanation:
B The Daily News: Los suplementos vitamínicos ayudan a aumentar la absorción de alimentos
Although we think of land when we hear the word biome, there are also aquatic biomes. The abiotic factors that
influence life forms vary with location within ocean systems. Oceanographers divide the ocean into five broad vertical
zones as seen in the chart above. Compare the characteristics of the five zones. The giant tube worms, Riftia
pachyptila, pictured here, have a red "plume at the tip of their free end which is an organ for exchanging compounds
with the environment. The tube worm does not have many predators. If threatened, the plume may be retracted into
the worm's protective tube. The plume provides essential nutrients to bacteria living inside the worm. Tube worms
have no digestive tract, but the bacteria, which may make up half of a worm's body weight, convert the oxygen,
hydrogen sulfide, carbon dioxide, taken in by the plume, into organic molecules on which their host worms feed.
Compare this information with the information in the chart. Where could these worms live?
A)
The tube worms can only live where there is no light: zones 3, 4, and 5.
B)
C)
Only in the top-most two zones so the bacteria can use the light for
photosynthesis.
In any zone in the ocean, provided it was not too cold and there is enough
oxygen in the water
They tube worms are suited to live in the halad zone only, where there is
no light and it is extremely cold.
D)
Answer:
D) They tube worms are suited to live in the halad zone only, where there is no light and it is extremely cold.
Explanation:
Although these tube worms reside in the trenches of the Halad zone at the lowest layer, they survive in darkness and freezing temperatures. Additionally, there are other species of starfish that inhabit this area, thus the starfish are also companions.
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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Plz help for brainliest .
Answer:
0.24
2.7
1.3
Explanation:
Density equals mass divided by volume. the mass of the cork is 5.7 and its volume(the amount of water it displaced) is 23.5 so [tex]\frac{5.7}{23.5} = 0.24[/tex]
the mass of the granite block is 2700. the formula to get the volume of a rectangular prism is Volume = length × width × height so 20 × 5 × 10 = 1000
Density equals mass divided by volume so [tex]\frac{2700}{1000} = 2.7[/tex]
Density equals mass divided by volume. the pipes mass is 78 and its volume is 60(amount of water displaced) so [tex]\frac{78}{60} = 1.3[/tex]
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]
Which of the following is objective ?
(select all that apply)
A. Opinion
B. Data
C. Fact
Answer:
Hi Friend! The Answer Is Option C
Objective means someone or something that is without bias
Explanation:
the difference between these two important ideas is the difference between fact and opinion. Facts are objective and opinions are subjective ideas held by individuals and so are always biased. ... This is presented as an objective fact but is clearly a subjective opinion.
How are biomes related to ecosystems?
Answer:
Biomes are large regions of the world with similar plants, animals, and other living things that are adapted to the climate and other conditions
Answer:
Biomes are large regions of the world with similar plants, animals, and other living things that are adapted to the climate and other conditions. An ecosystem is often much smaller than a biome, although the size varies. Ecosystems are the interactions between the living things and the nonliving things in a place.
Explanation:
hope this helps
How would the loss of predators contribute to deforestation in the
jungle?
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.
hope this is a decent answer :)
