Answer:
c
Explanation:
who cares
19. What macromolecule is common to surface markers, receptors,
carriers and channels? *
protein
carbohydrate
lipid
nucleic acid
Suppose we stock a pond with 100 fish and note that the population doubles in the first year (with no harvesting), but after a number of years, the population stabilizes at what we think must be the carrying capacity of the pond: 2,000 fish. Growth seems to have followed a logistic curve. a. What population size should be maintained to achieve maximum yield, and what would be the maximum sustainable fish yield? b. If the population is maintained at 1,500 fish, what would be the sustainable yield?
Answer:
Explanation:
From the given information,
The first process is to determine the initial growth rate by using the formula:
[tex]R_o = \dfrac{In(2)}{t_d}[/tex]
where;
The initial growth rate(constant) = [tex]R_o[/tex] ; &
the doubling time = [tex]t_d[/tex] = 1 year
[tex]R_o = \dfrac{In(2)}{1 \ year}[/tex]
[tex]R_o[/tex] = 0.693 / year
Now, we move up to the net stage to find the growth constant by using the formula:
[tex]r = \dfrac{R_o}{(1 - \dfrac{N_o}{K})}[/tex]
where;
[tex]N_o[/tex] = population of fish in the pond = 100
[tex]R_o[/tex] = The initial growth rate(constant) = 0.693 /year
K = carrying capacity = 2000
Then;
[tex]r = \dfrac{0.693 \ /year }{(1 - \dfrac{100}{2000})}[/tex]
[tex]r = \dfrac{0.693 \ /year }{(1 - 0.05)}[/tex]
[tex]r = \dfrac{0.693 \ /year }{(0.95)}[/tex]
r = 0.730 / year
a)
Now, the maximum yield can be evaluated by using the expression:
[tex]= \dfrac{rk}{4}[/tex]
[tex]= \dfrac{0.730 \times 2000}{4}[/tex]
= 365 fish per year
Also, the maximum sustainable yield is said to be half of the carrying capacity suppose that the population growth obeys logistic curve;
i.e.
[tex]N' = \dfrac{1}{2} \times 2000[/tex]
N' = 1000 fish
b)
If the population is maintained at 1500 fish;
The sustainable yield can be calculated by using the formula:
The Sustainable yield = [tex]r\times N (1 - \dfrac{N}{K})[/tex]
The Sustainable yield = [tex](0.730/ year ) (1500) (1 - \dfrac{1500}{2000})[/tex]
The Sustainable yield = 1095 × 0.25
The Sustainable yield = 273.75 fish per year
The Sustainable yield ≅ 274 fish per year
Population size should be maintained to achieve maximum yield and Sustainable yield if population is maintained at 1,500 fish are 364.7 , 273.525 fish per year
Sustainable yield:Given that;
Stock in start = 100 fish
Double in 1 year
Capacity of pond = 2000 fish
Find:
Population size should be maintained to achieve maximum yield
Sustainable yield if population is maintained at 1,500 fish
Computation:
Growth rate = ln₂ / 1
Growth rate = 0.693 per year
With no growth constraint r = [tex]\frac{0.693}{1-\frac{100}{2000} }[/tex]
With no growth constraint r = 0.7294 per year
A. Population size should be maintained to achieve maximum yield = [tex]\frac{0.7294 \times 2000}{4}[/tex]
Population size should be maintained to achieve maximum yield = 364.7 fish per year
B. Sustainable yield if population is maintained at 1,500 fish = [tex][(0.7294))(1500)][1-\frac{1500}{2000} ][/tex]
Sustainable yield if population is maintained at 1,500 fish = 273.525 fish per year
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Covalent bonds can be best described as neutral atoms coming together to share electrons. neutral atoms coming together to create electrons. ionized atoms coming together to trade electrons. ionized atoms coming together to destroy electrons.
Answer:
neutral atoms coming together to share electrons.
Explanation:
Answer:
The answer is neutral atoms coming together to share electrons.
Explanation:
Bc covalent compounds are compound whose atoms form bonds by sharing electrons
Have a great day!!
Why do you think ANIMAL CELLS are able to survive without the types of cell walls that are present in nearly every other group of organisms? Provide 3 answers.
Answer:
They survive because these cells need a high permeability to be able to maintain the internal cellular balance in relation to the external environment that surrounds them, and this is due to their high energy demand, their multi-complex and multiple functions, and the capacity for constant homeostasis with the environment. that surrounds them.
Explanation:
In addition, some cells need to transmit signals, second messengers or even to fulfill a function to exchange compounds for their transmembrane, this is what makes the human system together with other systems of other animals is extremely open and is in constant energetic exchange, in addition to Unlike plant cells, plant cells are under an autonomous regime, they do not need to take energy from the environment but they manufacture it themselves, and it fulfills a great function that is to provide structure and support, the wall they have is what gives it the ability to fulfill these two functions.
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION THANK YOU!!
Answer:
A.Negative Growth
Explanation:
Which valve allows for the blood to be pumped into the aorta?
Answer:
Aortic Valve
Explanation:
I just know it
Which is the best description of photophosphorylation?
Rough ER is mostly responsible for
making -__-, whereas smooth ER is
mostly responsible for making
Explanation:
The rough ER, studded with millions of membrane bound ribosomes, is involved with the production, folding, quality control and despatch of some proteins. Smooth ER is largely associated with lipid (fat) manufacture and metabolism and steroid production hormone production.
Based on your knowledge of reproduction in bryophytes and ferns, is the presence of flagellated sperm in cycads surprising? Why or why not?
Answer:
The correct answer is - All plants share a similar life cycle
Explanation:
The sperms that the bryophytes are biflagellated whereas in ferns these are multi-flagellated that helps in the swimming to the archegonia or female part to perform the fertilization, due to the presence of water.
The sperms in cycads also have flagella for the same purpose of swimming in the pollen tube. The ferns and the bryophytes both require the same or similar life cycle that includes the flagella and water for the formation of the zygote.
2. Which of the following statements best describes exocytosis ? *
(1/1 Point)
The way cells grow and become adult cells
The way cells get rid of waste products
The way cell communicate with each other
The way cells take in food and other materials
O
large balen whales, and even whale sharks feed primarily on plankton communities. How can such samll organism provide food for such large animals?
Answer:
plankton my look small but if you have a micoscope they are pretty big and no not because it is zoomed on them
Explanation:
do not question me smarts i am smart tho lot smarter then you think i am
Succession Interactive!
What is the difference between primary succession and
secondary succession?
Primary succession occurs in an area that is disrupted by a
fire or other natural disaster but secondary succession does
not.
Primary succession occurs after secondary succession.
Primary succession involves only plants but secondary
succession involves animals too.
Primary succession occurs in an area with no life and no soil
but secondary succession happens in an area where an
existing community was disrupted.
Answer:
Primary succession occurs in an area with no life and no soil but secondary succession happens in an area where an existing community was disrupted.
Explanation:
Ecological succession, which is the series of changes that occurs in an ecosystem over a period of time, can be divided into two types namely: primary succession and secondary succession.
- Primary succession is a kind of succession in which a bare surface or rock is colonized by certain organisms called PIONEERS. Primary succession occurs in an area with no life and no previous soil.
- On the contrary, secondary succession occurs in an area that has been previously colonized but disturbed as a result of natural occurrences e.g earthquake, wildfire, flooding etc.
Purple petal color in pea plants is dominant to white petal color. Two heterozygous pea plants are crossed.
Answer:
what do you need to know?
Explanation:
Answer:
use a punnett square if you need help u can ask me
Which is a component of cell theory?
a.All living things grow into cells.
b.All living things are made of cells.
c.Cells come from nonliving matter.
d.Cells come from non-cells.
Answer:
B.
Explanation:
That's true without cells we wouldn't live.
What effect does studying with music have on student test scores hypothesis?
Answer:
It helps them to focus
Explanation:
some people focus better when listening to music
Answer:
For some students it can help and for some it cant
Explanation:
The Ebola virus can often have symptoms similar to bacterial pneumonia, an infection of the lungs. These symptoms include chest pains, shortness of breath, and fever. Which statement best summarizes the differences between these two diseases? (SC.6.L.14.6)a.Viruses can replicate because they are living organisms, while bacteria cannot. b.Viruses are not living organisms, but bacteria are living. c.Viruses can be beneficial to live organisms but bacteria are often infectious. d.Viruses are living organisms, while bacteria are not.
Answer:
Eblow is a terrible thing.
Explanation:
Answer:
I think its, option b) Viruses are not living organisms, but bacteria are living.
Explanation:
The other options don't fit "summarize the differences b/w bacteria and virus", or simply don't make sense...
Bacteria can replicate as well, not only virus, so that cannot be a difference
The virus is often the one being more dangerous, there is something called "good bacteria"
A virus isn't living, (for the sake of this answer), and we all know for sure that bacteria is living
So, that's how option b is correct
I hope this helped you!!
Notice on the graph that the time period between 0 and 3 minutes forms a straight line on the graph.
What does this indicate about the rate of the reaction?
Answer:
The graph is positive.
Explanation:
Straight line on the graph indicates that the rate of reaction is positive which means that reaction intensity increases with the passage of time. OR in other words, the reaction produces more products with the passage of time and no decrease occurs in their rate because the graph is not coming downward or changing so that's why the graph go in the straight line.
Which helps in the production of eggs?
testosterone
estrogen
semen
fallopian tube
Answer:
Semen helps in the production of eggs!
answer:
... semen...
explanation:
i'd be embarrassed to explain that bit
Porcupines have long sharp hairs called quills. What is the main function of the quills on the porcupine?
Answer:protection from other predators.
Explanation: the quills will stick into a predator that attack the porcupine Note: it does NOT shoot its quills
Answer: protection from other predators.
How many hydrogen atoms are present in each water molecule?
A.
1
B.
3
C.
2
D.
4
Answer:
C. 2
Explanation:
Put these steps of solar system formation in order
Answer:
Explanation: I tried to use the answer that was on there and it was wrong so I got that answer wrong luckily it tells the the correct answer
Answer: Answer is explained below.
Explanation:
Solar system formation put in order:
A solar nebula forms. Gravity pulls the solar nebula upon itself.The solar nebula spinsfaster and faster.The solar nebula flattens into a disk. Gas becomes hot and dense and forms a star.Hope this helps someone. Good luck everyone!
*Karma will go after the next person who deletes my answer. How dare you!
What is the role of lay person like you in the mission of the church today?
Explanation:
base on the person opinion
HELP ME ASAP!!!!
Select the correct answer.
Gina is scuba diving when she notices a large fish glide over her. It has a flattened body and she notices gills on its underside. Which taxonomic
group does the fish belong to?
A.
Selachii
B.
Batoidea
C.
Sarcopterygii
D.
Actinopterygii
Answer:
Your answer is B) Batoidea. Batoidea is a superorder of cartilaginous fishes commonly known as rays.
Answer:
b because the guy above me said so
how do unicellular and multicellular organisms differ?
Answer:
Unicellular organisms- Organisms which have only single cell are called unicellular organisms.
Multicellualr organisms- Organisms with many cells are called multicellular organisms.
Answer:
multicellular organisms need organs to function properly
Explanation:
You want to know if black squirrels or brown squirrels have a greater birth rate. Your ALTERNATIVE hypothesis is:_________.
Answer:
Natural selection is a mechanism of evolution proposed by Charles Darwin. It is the differential survival and reproduction of individual due to the difference in the phenotype. Over time, this process results in populations which are better adapted to their environment as they tend to survive and produce new offspring. The brown squirrels with thick coat survive at a higher rate than the brown sqirrels without the thick coat. Thick coat is a adaptation for survival in cold winters which are chosen over the other and allowed to reproduce.
Explanation:
Please select the word from the list that best fits the definition
Brings dry, clear weather
Answer:
conduction?
Explanation:
Answer:
anticyclone/2nd one down
Is thigmotropism is caused by water?
Answer: No. Hydrotropism is caused by water
Explanation:
If you were beamed into the Earth's outer core and you wanted to move to somewhere cooler you would:
I’m stuck with this Encryption Table, if anyone can please help me solve this I would appreciate it very much.
Answer:
hu7gf6dcxyxycjc c.f. c ycyftc Tx tv hcv12345678910112131415161727 8gh
The term semiconservative replication refers to the fact that each new DNA molecule resulting from the replication process is "half-old, half-new." In the diagram, complete the replication required in the
middle of the molecule by adding the required letters representing the missing nucleotide bases. Recall
that ATP energy and the appropriate enzymes are actually required to complete this process.
Answer:
1. A
2. C
3. T
4. G
5. G
6. G
7. T
8. G
9. A
10. C
11. C
12. C
Explanation:
As stated in this question, Semi-conservative model of DNA replication is the acceptable model of replication in which the two synthesized molecules of DNA consists of one new and one old strand each. DNA replication is carried out by an enzyme called DNA polymerase.
In the semi-conservative model, a double stranded DNA separates into two single strands. Each single strand is used as a template for DNA polymerase to synthesize nucleotides based on complementary base pairing i.e. For every Adenine base, Thymine is added and for every Guanine, Cytosine is added and vice versa.
In this question showing an image of a DNA molecule undergoing replication using semiconservative model, the first DNA molecule consists of the following nucleotides on the old strand and its synthesized nucleotides on the new strand:
Old strand - New strand
1. T - A
2. G - C
3. A - T
4. C - G
5. C - G
6. C - G
On the second DNA molecule, we have the following nucleotides on the old strand and its synthesized nucleotides on the new strand.
Old strand - New strand
7. A - T
8. C - G
9. T - A
10. G - C
11. G - C
12. G - C