1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
liubo4ka [24]
3 years ago
7

Consider the following hypothetical population and compute the statistical measures below: #births = 50,000; #deaths = 10,000; #

immigrants = 5,000; #emigrants = 20,000; mid-year population = 1,000,000. Show formulas and all relevant work.
BR =
DR =
APGR =
DT =
Adjusted (True) Growth Rate =
Adjusted (True) Doubling Time =
Biology
1 answer:
777dan777 [17]3 years ago
5 0

Answer:

The birth rate refers to an average number of births in one year per thousand individuals in the population at mid-year.  

BR = (total birth in an annum / total population in mid year) * 1000

BR = (50000 / 1000000) * 1000 = 50

Death rate refers to an average number of death in an annum per thousand individuals in a population at mid year. Thus,  

DR = (total death / total population in mid year) * 1000

DR = (10000 / 1000000) * 1000 = 10

Annual population growth rate or APGR is calculated as:  

APGR = (Birth rate - Death rate) / Death rate

APGR = (50 - 10) / 10 = 4.0 %

Doubling time is the whole sum time needed for a population to get double in size. It is calculated as DT = ln (2) / growth rate

70 / 4.0 = 17.5 years

Thus, population will get double in 17.5 years.  

Adjusted (true) growth rate is equal to APGR + (NMR / Death rate)

And NMR = [(immigrants -emigrants) / total population] * 1000

NMR = [(5000 - 20000) / 1000000] * 1000 = -15

Thus, Adjusted (True) growth rate = 4.0 + (-15 /10) = -6%

The adjusted (true) doubling time = ln (2) / Adjusted growth rate  

= 70 / -6 = -11.66

This negative sign shows that it will never get double in such situation.  

You might be interested in
What is the ultimate measure of evolutionary success?
vfiekz [6]

There is only one measure of "evolutionary success": having more offspring. A "useful" trait gets conserved and propagated by the simple virtue of there being more next-generation individuals carrying it and particular genetic feature "encoding" it. That's all there is to it.

One can view this as genes "wishing" to create phenotypic features that would propagate them (as in "Selfish Gene"), or as competition between individuals, or groups, or populations. But those are all metaphors making it easier to understand the same underlying phenomenon: random change and environmental pressure which makes the carrier more or less successful at reproduction.

You will sometimes hear the term "evolutionary successful species" applied to one that spread out of its original niche, or "evolutionary successful adaptation" for one that spread quickly through population (like us or our lactase persistence mutation), but, again, that's the same thing.


6 0
3 years ago
Which of the following is a behavioral adaptation of the Venus fly trap?
blsea [12.9K]
The answer to the question is (A.)
3 0
3 years ago
Read 2 more answers
At what stage of erythropoiesis is the developing red blood cell released into the circulation
Lisa [10]
Erythropoiesis is the formation of the red blood cells a process which takes place in the bone marrow. All blood cells are formed in the bone marrow, a soft, highly cellular tissue that fills the internal cavities of the long bones. It takes place in 8 stages where the first seven steps takes place within the bone marrow and after the 7th step the red blood cell is released into the blood stream as reticulocyte which then matures to erythrocyte after 1-2 days.
3 0
3 years ago
Will mark the brainliest for who answer my questions!!!!
ycow [4]

Answer:

where is the question

Explanation:

5 0
2 years ago
What class of organic compounds stores energy as fat
mestny [16]

Answer:

Lipids

Explanation:

Fats are in the class of organic compounds known as lipids. Lipids are organic molecules that can store energy as fat.

3 0
3 years ago
Other questions:
  • A bike travels 4 miles in half an hour (0.5), what is its speed
    9·1 answer
  • During photosynthesis, plants capture light energy from the Sun to break weak bonds in reactants, such as carbon dioxide and wat
    6·1 answer
  • What is Nuc short for?
    11·1 answer
  • Give an example of a this characteristic of life for an animal and for a plant.
    5·1 answer
  • What name is given to a discrete packet of light?
    14·1 answer
  • The- - - - - is the area of a tooth the cervix to the apex
    13·1 answer
  • The gravitational potential energy of an object depends on its_____
    6·1 answer
  • What happened to water if it is being used faster than aquifers
    14·1 answer
  • Hii! Please help me on this question!
    7·2 answers
  • What plant tissue located at the tips of roots and shoots will differentiate into different plant cells?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!