It is estimated that the world human population reached 3 billion people in 1959 and 6 billion in 1999. Assuming a carrying capacity of 16 billion humans, write and solve the differential equation for Gompertz growth, and determine what year the population reached 7 billion. Was logistic growth or Gompertz growth more accurate, considering world population reached 7 billion on October 31,2011
Answers
Answer:
i ) Gompertz equation :
[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]
ii) The year that population reaches 7 billion is 2013
iii) The logistic growth was more accurate
Explanation:
i) write and solve the differential equation for Gompertz growth
Gompertz equation :
[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]
∝ = growth rate
k ( carrying capacity ) = 16 * 10^9
P(t) = population at time t
ii) Determine what year the population reached 7 billion
The year that population reaches 7 billion is 2013
solution attached below
iii) Determine if logistic growth or Gompertz growth was more accurate considering world population reached 7 billion on October 31,2011
The logistic growth was more accurate because the when Logistic growth model was used, the year in which the population reached 7 billion was 2010 and this value is more closer to 7 billion on October 31 2011 ( given value )
Related Questions
Which of the following is needed for cellular respiration?
carbon dioxide, water, and sunlight
water, oxygen, and glucose
water, glucose, and carbon dioxide
oxygen and glucose
Answers
Answer:
The answer is oxygen and glucose
Which of the following is true of the composition of all materials?
A.
All materials are made up of large parts that can only be seen by the human eye.
B.
All materials are made up of smaller parts that cannot be seen without magnification.
C.
All materials are made up of living cells.
D.
All materials are made up of only one part.
Answers
Answer:
Option B.
Explanation:
All materials are made up of smaller parts that cannot be seen without magnification.
What is parturtion and lactation???
Answers
Answer:
It is the process of production of milk by the mammary glands at the end of pregnancy. The milk produced initially by the glands is called colostrum. This milk is crucial for the baby as it provides the child with the initial immunity. This was a brief explanation of pregnancy, parturition, and lactation.
Explanation:
i hope this helps.... I found these
Viruses cause which of the following human diseases?
O the flu, AIDS and Bubonic Plague
O the flu, AIDS and athlete's foot
AIDS, cold sores and athlete's foot
the flu, AIDS, and cold sores
Answers
Answer:
the flu, AIDS and Bubonic Plague
We have 13 different clotting factor proteins in our blood. Do you think hemophilia is controlled by one or multiple genes?
Answers
Hemophilia A and hemophilia B are inherited in an X-linked recessive pattern . The genes associated with these conditions are located on the X chromosome, which is one of the two sex chromosomes . In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. Basically it's whatever you believe it is.
how does the structure of simple cuboidal connect to its function
Answers
Answer:
Simple cuboidal epithelial tissue is specialized for diffusion and absorption. The reason our kidneys function the way they do is because of the movement of water and salts in and out of the kidney tubules.Likewise, the cuboidal shape of the cells allows greater surface area for absorption to take place.
In cellular reproduction, ___ ALWAYS occurs in 5’ to 3’ direction
Answers
Answer:
DNA replication
Explanation:
DNA replication is the process whereby the genetic material (DNA) duplicates itself into two identical copies. This process must occur prior to any cellular division (meiosis or mitosis) in order to ascertain that each daughter cell gets an even and correct amount of DNA.
The process of DNA replication begins with the unwinding of the double stranded DNA molecule into two single strands of DNA. One strand called leading strand runs from 3'-5' while the other strand runs from 5'-3'. However, DNA replication proceeds in the 5'-3' direction.
In the fantastic Jillalope, the offspring of a true-breeding black parent and a true-breeding white parent all appear gray. When these gray offspring are crossed among themselves, their offspring always appear in a ratio of 1 black : 2 gray : 1 white. Upon close examination of the coats with a magnifier, each hair of a gray animal has closely-spaced alternating black spots and white spots, but no gray spots. What is the mode of inheritance
Answers
Answer:
Co-dominance
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Which of the following occurs first in meiosis?
1. Homologous chromosomes line up in the center of the cell.
2. Chromosomes line up in the middle of each cell.
3. Crossing over between segments of homologous chromosomes.
4. Chromosomes are pulled to opposite poles of the cell.
Answers
Answer:
Crossing over between segments of homologous chromosomes.
Explanation:
Crossing over happens during prophase I of meiosis I
The stage of mitosis where the chromosomes line up
Answers
Answer:
Metaphase
Explanation:
Chromosomes line up at the metaphase plate, under strain from the mitotic shaft. The two sister chromatids of every chromosome are caught by microtubules from inverse shaft posts. In metaphase, the shaft has caught every one of the chromosomes and arranged them at the center of the cell, prepared to separate.
Answer:
It is metaphase.
Explanation:
In metaphase (a), the microtubules of the spindle (white) have attached and the chromosomes have lined up on the metaphase plate. During anaphase (b), the sister chromatids are pulled apart and move toward opposite poles of the cell.
In people-eaters, purple is dominant to white. A true-breeding white mutant is mated with a different true-breeding white mutant. All of the F1 are purple. When the purple F1 offspring mate with each other, their offspring occur in the ratio of 9 purple : 7 white. Which phenomenon explains the purple F1 offspring
Answers
Answer:
The correct answer is - Complementation.
Explanation:
In this pattern of inheritance, there are two same type mutants that are crossed that are true-breeding white with another true-breeding white mutant. Let these mutants are CCpp and the other be ccPP.
All the f1 offspring produced are found to be purple in color as offspring will be CcPp. The products of both gene C and P required for the purple pigment to be expressed these genes complement each other and the absence of any of gene results in lack of the dominant phenotype.
how does the anti tetanus serum prevent tetanus
Answers
Answer: It is used to prevent tetanus in those who have a wound that is at high risk and have not been fully vaccinated with tetanus toxoid. It is also used to treat tetanus along with antibiotics and muscle relaxants. It is given by injection into a muscle.
Explanation:
a medication made up of antibodies against the tetanus toxin. It is used to prevent tetanus in those who have a wound that is at high risk and have not been fully vaccinated with tetanus toxoid. It is also used to treat tetanus along with antibiotics and muscle relaxants.
Answer the following questions:
1. How does motion help us in our daily life?
2. How would you be able to help those people who cannot move due to
paralysis
Answers
Answer:
1. Lack of motion is death. Movement is a vital nutrient to your body, just as much as food, water, and oxygen.
2. Potassium supplements can prevent attacks of paralysis.
Explanation:
You have isolated a bacterium from a contaminated river but you are unable to culture it in the laboratory. Which method could you use to identify the organism
Answers
Answer:
DNA sequencing
Explanation:
DNA sequencing is the method which can be used in order to identify the bacterium that was isolated from the contaminated river. DNA sequencing is the process in which the sequence of nucleotides is determined that is present within a DNA molecule. For identifying the bacterium, the sample of bacteria is collected. After sample collection is completed, genomic DNA is extracted from the bacteria and DNA sequencing will be done of that bacteria.
Without doing a Punnett square, predict what percentages of
offspring the cross among a heterozygous slipper footed
pigeon and a non-slipper footed would create:
Answers
Answer:
50% slipper footed, 50% non-slipper footed
Please help me with this biology thing.
Answers
Answer:
Answer:
1.
a)dd
b) dd
c) 0%
2.
a) 25%
b) 75%
c) 25%
3.
a) 03
b) 0
c) tt
4.
a) FF x ff OR FF x Ff OR FF x FF
b) Because all the children have freckles
All of these ___ help to block, trap or flush pathogens out of the body.
What are the following 6-
A-e???
Answers
Answer:
natural barriers
Explanation:
skin, mucous membrane, tears, earwax, muscus, stomach acid
10
Obsidian and pumice are extrusive igneous rocks and lack crystals. Why is it that these rocks
do not have crystals? *
(1 Point)
There were no minerals in the magma
The lava cooled slowly deep inside the Earth
The lava cooled too quickly above the Earth
The pressure was too great to make any crystals
Answers
Answer:
Hi to the mountain
Explanation:
How does a single fertilized egg cell develop into so many
different types of specialized cells?
Answers
Answer:
it hatches and the baby comes out
What is a virus and what cause a viruses
Answers
Causes: Viral infections occur when a virus enters the body and invades the inside of the body's cells in order to reproduce. If the body's immune system is unable to fight off the virus, it multiplies and spreads to other cells, repeating the process and leading to a widespread infection.
Which of the following best describes a population?
A. All of the seagulls that live along the coast
B. All of the seagulls that live along the coast, the fish they eat, and the water
C. All of the seagulls that live along the coast and the fish they eat
D. All of the seagulls that live along the coast, as well as the sand and the water
Answers
Answer:
I think that the answer might be C
Answer:
I mean it looks like B to me but I could be wrong. :)
Explanation:
You are trying to determine the mode of inheritance for the mutant curly-winged phenotype in Drosophila. You cross pure-bred wild-type flies with pure-bred mutant (curly-winged) flies and notice that all of F1 has curly wings. You make the scientific hypothesis that the curly-winged phenotype is autosomal dominant to the wild-type wing phenotype. a. If your scientific hypothesis is correct, what ratios would you expect to see in your F2 generation?
Answers
Answer:
The correct answer is - In F2 generation we should get a 3:1 ratio of phenotypes. 3 curly dominant, 1 wild type recessive.
Explanation:
In the given case, the cross between pure-bred wild-type flies with pure-bred mutant (curly-winged) flies and it is found that in F1 generation all offsprings are curly wings which means curly wings are dominant over wild-type.
let assume w gene is responsible for wild type and W gene is responsible for the curly wings which is dominant over wild type
W W
w Ww Ww
w Ww Ww
now on self crossing
W w
W Ww Ww
w Ww ww
In f2 generation there are 75% chances of the curly wing and 25% chances of wild type or the ratio of phenotype would be 3:1
Please help!!!! 20 points
Answers
Answer:
Producers: Leaves and the other plant thing (i don't know the name of it)
First-level consumers: Squirrel, grasshopper, rabbit, rat
Second-level consumers: Frog, rat
Third-level consumers: Fox, owl, snake
Herbivores: Grasshopper, rabbit, squirrel
Carnivores: Frog, fox, snake, owl
Omnivores: Rat
A member of a population of genetically identical organisms that were produced from a single cell.
a
bacteriophage
b
clone
c
transgenic
d
restriction enzyme
Answers
See below, b represents
Options
water
glucose
oxygen
CO2
Answers
Answer:
CO2
Explanation:
CO2 is needed to produce glucose
Can someone help???? Question: In what domain would humans be included?
Answers
Answer:
Eukarya
Explanation:
hope this helps
chloroplast illuminated with strong light will show a large oval white starch formation within chloroplast. Would you expect the plant in which this structure was found to have been illuminated with strong light immediately before it was prepared for electron microscopy
Answers
Answer:
trees
Explanation:
STATE 3 function's of gibberling in biology
Answers
Answer:
Gibberellins (GAs) are plant hormones that regulate various developmental processes, including stem elongation, germination, dormancy, flowering, flower development, and leaf and fruit senescence. GAs are one of the longest-known classes of plant hormone.
Explanation:
In the figure above which fatty acids are most likely to be solid at room tempearture
Answers
Why is it important that tissues are composed of specialized cells?