Answers
Answer:
When the rule of 70 applies to population, dividing 70 by the percentage of population growth should equal the time (in years) that the population needs to be double (option A)
Explanation:
The rule of 70 is useful to calculate the time in which a variable of any type can be duplicated. The calculation is done by dividing the number 70 by the percentage of growth of the variable.
If the rule of 70 is applied to the population, it is possible to calculate, based on its growth rate, the time that population would need to double.
If, for example, the growth rate of a population is 3 percent:
70 / 3 = 23,33
This indicates that a population, with a growth rate of 3% would need about 23,33 years to double.
Related Questions
Which of the following BEST describes a cell using passive transport to maintain homeostasis?
A. oxygen moving from a high concentration in the lungs to a low concentration in the blood
B. ATP is used to pump K+ ions out of the cell and Na+ ions into the cell to resting potential
C. a white blood cell uses a vesicle to engulf bacteria to help fight an infection
D. a transport protein moves amino acids from a low concentration in the blood to a high concentration in the small intestines.
Answers
Answer:
Diffusion: the Simple and the Facilitated
Diffusion is the movement of particles down their gradient. A gradient is any imbalance in concentration, and moving down a gradient just means that the particle is trying to be evenly distributed everywhere, like dropping food coloring in water. This is what happened when we made our granola - a bunch of separate ingredients came together and spread out across the whole mixture. We call this evening-out moving “downhill”, and it doesn’t require energy. The molecule most likely to be involved in simple diffusion is water - it can easily pass through cell membranes. When water undergoes simple diffusion, it is known as osmosis.
Movement Across a Membrane and Energy
There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
Cartoon representing passive transport as rolling a boulder down a hill and active transport as rolling a boulder up a hill.
Explanation:
i hope this helps
Diffusion of the Facilitated and Simple best describes a cell that uses passive transport to maintain homeostasis.
What is passive transportation?Passive transport is a type of membrane transport in which substances are moved across cell membranes without the use of energy. Unlike active transport, which uses cellular energy to move substances across cell membranes, passive transport uses the second law of thermodynamics to move substances across cell membranes. Passive transport is defined as the movement of a solute from one side of the cell membrane with a high electrochemical potential to the opposite side with a lower electrochemical potential. Passive transport requires no energy input. Diffusion, the movement of molecules from a high concentration area to a low concentration area, is an example of passive transport. Facilitated diffusion is mediated by carrier proteins and channel proteins.To learn more about passive transportation refer to:
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Which two organisms have a placenta?
A. camel and hawk
B. shark and hawk
C. human and koala
D. human and camel
Answers
Answer:
D.human and camel
Explanation:
because they are both placentar mammals
What type of atmospheric conditions does weather describe?
O Average
Current
Globa
Long term
Answers
Answer:
It is Average
Explanation:
NATURAL SELECTION is defined as, individuals that have certain inherited traits tend to survive and reproduce at higher rates because of these traits.
a. True
b. False
Answers
Answer:
True.
Explanation:
It is defined as, individuals that have certain inherited traits tend to survive and reproduce at higher rates because of these traits
Natural selection is defined as organisms developing inherited traits that better help them survive in their environment.
Hope this is correct, have a great day!
Ecology focuses on
O A. ways to address environmental pollution and overpopulation.
O B. how organisms relate to each other and their environment.
O
C. how human activities affect the environment.
the relationship between economics and biology.
Answers
Please help me please
Answers
Answer:
..... Paracites....
Explanation:
im pretty sure it would be parasites because those factors are really harmful to other animal populations. They do not benifit in any cause but do impact. Thefore the answer would be parasites
hope it helped :P
During typical urination, a man releases about 400 mL of urine in about 30 seconds through the urethra, which we can model as a tube 4 mm in diameter and 20 cm long. Assume that urine has the same density as water, and that viscosity can be ignored for this flow. a. What is the flow speed in the urethra
Answers
Answer:
The flow speed in the urethra is 3.77 m/s
Explanation:
The flow rate or speed of a liquid is a measure of the volume of liquid that flows in a given amount of time.
Fluid flow rate, Q = area of the pipe or channel × velocity of the liquid
Q = A × v ; where Q is in m³/s or L/s; A is in m²; velocity, v = is in m/s
Also flow rate, Q = volume/time
volume, V, is in m³ and time is in seconds
therefore, V/t = A × v
v = At / V
Volume, V = 400 mL = 0.4 L = 4 × 10⁻⁴ m³
Area, A, of tube = πr², where r is radius in meters
r = 4 mm = 4 × 10⁻³ m
A = 22/7 × (4 × 10⁻³ m)²
therefore, v = {22/7 × (4 × 10⁻³ m)² × 30}/4 × 10⁻⁴ m³
v = 3.77 m/s
Therefore, the flow speed in the urethra is 3.77 m/s
Cells are open systems that exchange matter and energy with their surroundings. Which of the following best explains why plant cells require sunlight to make organic compounds, according to Gibbs’s theory of free energy? The energy input required for making organic compounds equals the usable energy output of respiration. The energy required from sunlight to start photosynthesis is less than the energy needed from another energy source. The energy required to make organic compounds is always greater than the potential energy stored in these compounds. The energy that a plant absorbs from sunlight is spontaneously transformed into chemical energy because the outputs are more stable.
Answers
Answer:
The energy input required for making organic compounds equals the usable energy output of respiration.
Explanation:
A reaction is endergonic (energy-consuming) process if the change in free energy is positive.
A positive change in free energy implies that energy is required to enter into the system. Let us recall that free energy is a state function. Hence, change free energy =free energy of products - free energy of reactants.
If free energy of products > free energy of reactants then the reaction is an endergonic (energy-consuming) process..
But The energy input required for making organic compounds equals the usable energy output of respiration, hence making the process spontaneous.
The following best explains why plant cells require sunlight to make organic compounds, according to Gibbs’s theory of free energy - The energy that a plant absorbs from sunlight is spontaneously transformed into chemical energy because the outputs are more stable.
photosynthesis
is a process that occurs in the presence of sunlight in order to derive energy.
These organisms by doing work release energy into the environment.The energy released into the environment is in form of heat.Plants release energy into the atmosphere when they do any work. they also release energy in the surrounding.It is an open system where energy can be transferred from one part of the system to another part of the system.Plant cells require sunlight to make organic compounds, according to Gibb's theory of free energy because, the energy that a plant absorbs from sunlight is spontaneously transformed into chemical energy because the outputs are more stableThus, The following best explains why plant cells require sunlight to make organic compounds, according to Gibbs’s theory of free energy - The energy that a plant absorbs from sunlight is spontaneously transformed into chemical energy because the outputs are more stable.
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Which statement correctly describes how a sound wave travels through air? A. The wave carries molecules of air away from the source of the sound. B. The wave carries energy that causes molecules to move back snd forth. C. The wave carries a molecule in one direction until it collides with another molecule. D. The wave move through air and gains energy from the moving molecules that it touches.
Answers
Answer: A. The wave carries molecules of air away from the source of the sound .
Explanation:
The wave carries molecules of air away from the source of the sound describes a sound wave travels through air. So, the correct option is (A).
What are Waves?
When a disturbance in a medium occurs while carrying energy without a net movement of particles, this phenomenon is known as Wave. It can take the form of elastic deformation, a variation of pressure, electric or magnetic intensity, etc. There are some important parts in the Wave, they are- disturbance or variation which travelled through a medium.
There are three types of waves which is based on the orientation of particle motion and direction
Mechanical wavesElectromagnetic wavesMatter wavesWaves come in many shapes and forms which share some basic characteristic properties and behaviors can be distinguished from others based on several characteristics.
Thus, the wave carries molecules of air away from the source of the sound describes a sound wave travels through air. So, the correct option is (A).
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A train is comparable to a ________________________. A train car is comparable to a _______________________. What are the building blocks of macromolecules
Answers
Answer:
The correct answer is - Polymer (macromolecules), monomer (building blocks
Explanation:
Polymers are comparable to the train as polymers are made up of several monomers linked together to carry more but can be removed from the polymer if required similarly the train cars that are comparable to the monomers or building block are joined together but can be taken off.
Macromolecules are polymers that are made up of joining monomers together and makes large molecules. Macromolecules like carbohydrates are made up of monosaccharides as monomers, proteins are made up of amino acids as monomer or building block, lipids are made up of fatty acids and nucleic acid are made up of nucleotides.
Help please djdndnndndndb
Answers
Answer:
the first is circulatory
the second one I think is the third answer
HELPPPPPPPPPPPPPPPPPPPP
Answers
Answer:
25
Explanation:
Which of the following best describes the role of photosynthesis and cellular respiration in the cycling of carbon through the atmosphere?
A. Photosynthesis in plants puts carbon back in the atmosphere and cellular respiration in animals removes carbon from the atmosphere.
B. Photosynthesis and cellular respiration remove carbon dioxide from the only geosphere atmosphere.
C. During photosynthesis and cellular respiration, carbon becomes a part of glucose and is used as a nutrient to both plants and animals.
D. Cellular respiration in animals plus carbon dioxide in the atmosphere for plants to use during photosynthesis.
Answers
Answer:
A
Explanation:
I got the question right
What might happen if there were no controls on the cell cycle?
Answers
Answer: When cell cycle is not controlled, it leads to still alive older cells and newly formed younger cells growing along with each other resulting in a tumor which is malignant, that is cancer. This can happen due to many factors as a result of genetic mutations.
Explanation:
A lack of control on cell cycle would cause older living cells to grow alongside younger living cells (newly formed), thereby, resulting in the formation of malignant cells (tumors) such as cancerous cells.
A cell cycle refers to an ordered sequence of events that takes place within a living cell as it grows and divide into two new daughter cells.
Basically, there are four (4) main stages in a cell cycle and these are:
Gap 1 (G1).Synthesis (S).Gap 2 (G2).Mitosis (M).The cell cycle is usually controlled and regulated so as to ensure living cells only divide as and when required by the body system of a living organism.
Hence, at each stage of a cell cycle, a set of conditions and control system determines whether or not a particular cell will continue into the next stage.
Generally, the cell cycle is controlled by cyclin-dependent protein kinases (Cdks) and regulated by subunits referred to as cyclins.
In conclusion, lack of control on cell cycle would cause older living cells to grow alongside younger living cells (newly formed), thereby, resulting in the formation of malignant cells (tumors) such as cancerous cells.
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In order for a single-celled organism to reproduce, it may undergo
a.
binary fission
b.
sexual reproduction
C.
fertilization
d.
pollination
Answers
Answer:
Binary Fission
Explanation:
Single-celled organisms reproduce using binary fission. For example, bacteria are single-celled organisms. They reproduce using binary fission. Binary fission is the process of an organism splitting itself into two parts, with the parent's DNA in the new part.
Good Luck!
does energy from Earth’s interior affect surface changes?
Answers
Yes Energy produced deep inside Earth heats rock in the mantle. ... As it becomes less dense, the heated rock rises toward Earth's surface. The cooler, denser rock surrounding the heated rock sinks, as Figure 5 shows. In this way, heat inside Earth moves toward the cooler crust.
Which crop is preferably harvested by hand?
A. Wheat
B. Rice
C. Potato
D. Grapes
Answers
Hope this helps you
Which of the following variables in an experiment is the one thing is being tested and can be manipulated by the scientist
Answers
Answer:
the dependent variable
Explanation:
this is the variable that can be manipulated
2.) 19. Which of these processes is important in increasing genetic diversity in
organisms?
♡
Answers
Answer:
its either meiosis or mitosis i cannot remember which though
Explanation:
The process that is important in increasing genetic diversity in organisms is meiosis, and in this process, the genetic diversity is seen due to the genetic crossing over and the recombination.
What makes meiosis important for the organism?Meiosis is the process in which the parent cell makes the gametes that are haploid in nature; the male makes the sperm and the female makes the ovum in this process, and each of these gametes contains half of the genetic materials of the parent. Because meiosis results in genetic diversity in nature, it is important for the organism that produces offspring through sexual reproduction, and genetic diversity is seen in animals due to this process.
As a result, meiosis is an important process for increasing genetic diversity in organisms, and genetic diversity is visible during this process.
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Name 3 abiotic factors found in the Yellowstone ecosystem
Answers
Answer:
rocks, water, geyser
I have to match these can someone help me ASAP thank you
38. Traits that increase fitness become
more prevalent over time: _____
39. Why males of a species may have traits that
seem to decrease their chances of survival: _____
40. The effect of random events,
especially in population of small size: _____
41. When one allele changes
into a different allele: _____
42. The movement of individuals
into or out of a population: _____
A. natural selection
B. sexual selection
C. genetic drift
D. gene flow
E. mutation
Answers
Answer:
38 A
39 B
40 C
41 E
42 D
Explanation:
Ngl the first few answers seem sus but I know these are correct
Tell me about a time when you made a mistake.. How did you find it and what did you do to correct it? (On the job, school work, recipe, etc)
Answers
Answer:
There was a time when I was in high school and I had a Math test. I did all the tasks in the test and was sure I answered everything correctly. However, just before I was about to submit the test, I saw that I forgot to add the minus sign (-) in one of the results. I quickly corrected my mistake and successfully submitted my test. In the end, I got an A as I really answered everything correctly.
What did Schwann contribute to the Cell Theory?
Answers
Answer:
Schwann verified the existence of cells and he traced the development of many adult tissues from early embryo stages.
Which of the following is true of transcription.
Question 4 options:
only mRNA is made through transcription, tRNA is made in translation
transcription translates an entire DNA strand into mRNA
transcription occurs in the cytoplasm ******
only one gene is transcribed at a time
Answers
Answer:
its A
Explanation:
because the RNA is made through transcription
The transcription is the process of an RNA copy of the genes and the sequences of the genes.
The copy know as the RNA enters the molecules and leaves the nucleus of the cell to enter the cytoplasm. It has the ability to direction the synthesis of the protein which is encoded. The Prokaryotic transition takes place in the cytoplasm along with the translation. The process can take place very immediately and can take place along the nucleus of the cytoplasm.Hence the option C is correct.
Learn more about the is true of transcription.
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How do diffusion and osmosis differ?
Diffusion takes place in eukaryotes; osmosis takes place in prokaryotes.
Only water molecules move during diffusion; oxygen and waste move during osmosis.
Only water molecules move during osmosis; oxygen and waste move during diffusion.
Substances move into cells during diffusion; substances move out of cells during osmosis.
Answers
Im answering here to not only agree to the other person answering before me. I am also here to allow you to post brainliest for the other guy
Sedimentary rocks are formed when sediments, smaller pieces of rock, gravel, sand, silt, or clay, are compacted and cemented together O True O False
Answers
Answer:
TRUE
SCJSDCBDSBV
DF
BV
FDS
BV
DFBVBDF
V
DF
Explanation:
What is the function of the nucleolus?
Please hurry it has to be 5-15 words and it can not be exact as what it says online
Answers
Answer:
It controlls and regulates the activities of the cell
It controlls the protien and enzyme synthensis.
It controlls the cell division and cell growth.
It is the storage of DNA,RNA and ribosome.
It controlls the heredity characteristics of the body.
Nitrogen fixing bacteria in soil turns nitrogen gas into
Water
Ammonia
Oxygen
Carbon dioxide
Answers
Answer:
Ammonia
Explanation:
Nitrogen fixing bacteria turn nitrogen into ammonia and plants can absorb it
Hope this helps :)
two of the risk factors for down syndrome include which of the following?
Answers
Answer:
Risk factors include: Advancing maternal age. A woman's chances of giving birth to a child with Down syndrome increase with age because older eggs have a greater risk of improper chromosome division. A woman's risk of conceiving a child with Down syndrome increases after 35 years of age.
Answer:
advancing maternal age.
Explanation:
Which refers specifically to a solution with as much dissolved solute as it can hold at a given temperature?
supersaturated
saturated
heterogeneous
homogeneous
Answers
Answer: Saturated
Explanation: On Edge!!!!!!!!!!!!!!
A solution that has as much dissolved solutes as it can hold at a given temperature is said to be saturated.
What are saturated solutions?Saturated solutions are solutions with maximum dissolvable solute at a specific temperature. Supersaturated solutions are those that contain more than dissolvable solute at a given temperature.Heterogenous solutions are solutions with variable compositions and properties within them.Homogenous solutions are solutions with uniform compositions and properties.More on saturated solutions can be found here; https://brainly.com/question/6796721
