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Suppose that of a cohort of 200 rats in a rat colony born in January, 160 are still alive at the start of March and 120 are still alive at the start of May. What is the survivorship up to the start of March
Survivorship is the probability that individuals from the original cohort (age 0) get to a certain age (age x). Survivorship up to the start of March is 0.8.
What is a life table?
It is a representation of life and death patterns in a cohort. It includes the probability for different organisms in the population to live, survive, reproduce or die.
It is composed of information provided by parameters like age structure, natality rate, and death rate per age concerning the whole population.
There are two types of life tables:
Horizontal life tableVertical life tableWhat is the horizontal life table?This is a representation of a cohort destiny, from the born moment to the death moment of all individuals, including survival and fecundity per age.
A cohort is a group of individuals of the same age that are incorporated into the population at the same time.
This table is based on different vital statistics. Among them, we can mention,
Number of individuals registered at a certain age, N(x)Number of individuals at initial age (recent born, seeds, propagule), N(0)Specific survivorship per age, l(x)Transition rate from one age to the next one, p(x)The proportion of the original cohort that dies during a certain age x, d(x)Specific mortality per age, q(x)
Specific survivorship per age, l(x), is the proportion of individuals from the original cohort that gets to survive reaching a certain age. It is the probability that a recent born gets to a certain age.
l(x) = N(x) / N(0)
Values must go from 0 to 1. By definition, when l(x) = 1, then X = 0
In the exposed example, we know that
N(0) = 200 rats ⇒ new bornsN(x) = 160 rats ⇒ three months individualsl(x) = N(x) / N(0)
l(x) = 160 / 200 = 0.8
Survivorship specific per age up to the start of March is 0.8 = 80%
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The most common sweat glands that release a watery secretion are _________ sweat glands and modified sweat glands in the ear are called _________ glands.
Answer:
Eccrine and Apocrine
Explanation:
How does differential gene expression control organismal development?.
Epigenic inheritance controls what genetic materials end up in each of the different cells. This determines its fate…
question 11: After conducting research, does your conclusion need revision? why? support your revision with evidence from literature.
Works cited:
Yes, after conducting research, your conclusion needs revision. It is done to diminish the chances of mistakes that unknowingly happens.
What do you mean by Research?Research may be defined as the invention of new understanding and the use of existing knowledge in an unexplored and creative way so as to induce new concepts, methodologies, and understandings.
After the research has been successfully completed, the observations should be discussed with a guide or colleagues to get their assurance.
If they found any issues with the methodology, outcome, and conclusion, they will ask you to modify all the valid corrections.
Do the same and minimize the level of mistakes and corrections as much as possible to obtain better results.
Therefore, after conducting research, your conclusion needs revision.
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Answer:
Research how human activity has affected ocean life. Find reliable sources (.org, .edu, .gov) that provide enough information to determine whether your paragraph requires revision. However, if your answer covers the same points and topics and has no grammatical issues, then it is not required.
Hi, I want to know what tract means in biology. Pls, elaborate on that.
Answer:
Tract is the system of body parts , they perform functions together .
Explanation:
A Scientific tract , designed for instruction and entertainment, and adapted to schools, lyceums and families.
Discuss the importance of a balanced diet.
Answer:
u need a healthy diet cause it gives u the nutrients and energy u need to survive. ur body is more prone to disease n infections if u dont have a balanced diet. immune system weakens if u eat nutrient-poor foods. also here's something i copy-pasted from a random website:
revents diseases and infections. When you eat the full range of vitamins, minerals and other nutrients you improve your immune system and your healthy diet may even help prevent diseases like cancer, heart disease, diabetes, and stroke.
Helps you control your weight. Most people at some point want to lose weight or gain weight – eating a balanced diet helps you control your weight and maintain it over time. It is not feasible to be on a weight-loss diet forever – a balanced diet is the only way to healthily control your weight in the long term.
Improves your mental health. Getting the right mix of nutrients can help to ease symptoms of depression and anxiety – looking after yourself by eating well is essential as you take steps to good mental health.
Good for growth. A balanced diet is crucial for children and adolescents. As the body grows it is important to receive the right nutrients so that cells are built and maintained and the body grows at the right pace.
Better skin and hair. A healthy balanced diet also improves your looks. Eating well contributes to healthy skin and hair and a “glow” that makes you look younger.
this isnt very science-y but i tried to help the best i could so this should give u starting off point. have a great day/night
Explanation:
The main purpose of cell division is
A. to produce more cells.
B. to produce cellular energy.
C. to remove cellular waste.
D. to absorb nutrients.
Answer:
Of the options available I would say that the correct answer is A. To produce more cells
Which of the following determined that the conduct need not seriously affect an employee's psychological well-being or lead the employee to suffer injury to be considered harassment?
Bill of Fair Treatment
U.S. Supreme Court
Anti-Harassment Policy of 1999
U.S. Congress
Answer:
Anti-Harassment Policy of 1999
Which of the following statements is not true?
a. The human body contains trillions of cells,
b. The cells that make up an organism must compete to survive.
c. Each human being began as a single cell,
d.cells inside your body are living, reproducing, and dying all the time.
Answer:
Explanation:
c each human being began as a single cells
Which combining form means plaque or fatty substance?.
Answer:
Ather/o is the combined form means Plaque or Fatty Substances.
in reference to carbon (IV) oxide, explain the concept of limiting factors in relation to photosynthesis
Answer:
As carbon dioxide concentrations increase, so too does the rate of photosynthesis until a certain point where the graph levels off. At lower carbon dioxide concentrations carbon dioxide is the limiting factor because an increase in carbon dioxide causes an increase in photosynthesis
Explanation:
brain leist bhe:)
Ischemic cell damage is caused by a lack of blood flow, which deprives cells of Multiple choice question. A) sodium ions. B) potassium ions. C) oxygen. D) carbon dioxide. E) chloride ions.
Ischemic cell damage is caused usually due to blockage in the blood vessels and causes a lack of blood flow. It causes a shortage of oxygen which is needed for cellular reactions.
What is Ischemic cell damage?Usually, Ischemic cell damage is caused due to any blockage in the artery generally due to atherosclerosis.
Atherosclerosis causes the accumulation of plaque in the artery which is a hard and sticky substance made up of fat.
This plaque causes blockage and restricts the blood flow. It also causes the deprivation of oxygen to the cells.
Thus, the correct option is C.
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______ began to fuse to form helium.
Answer:
The answer is Two Protons.
Explanation:
Two Protons Began to fuse two form helium.
Neurospora (bread mold) and Saccharomycetes (bakers yeast) are both fungi. Chickens and turkeys are both birds. What can you say about the inferred evolutionary relationships between the two birds compared to the relationship between the two fungi
By the comparison of nucleotide/amino acid sequences, it is possible to infer a lesser number of differences between birds and fungi.
What is sequence homo-logy?The term 'sequence homo-logy' makes reference to the similarity degree between nucleotide/amino acid sequences.
Sequence homo-logy is a feature strongly associated with a common evolutionary origin (ancestry).
The sequence homo-logy can be used to determine evolutionary relationships between species.
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How much energy goes to the next trophic level in an energy pyramid?.
Answer:
10%
Explanation:
It is not a lot of energy but it is said to be at least 10% because the rest is lost through heat.
Which energy producing process takes place in this organelle
Answer: chemical energy
Explanation:
Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).
3. What is the process of collecting insect samples? What challenges are
there in collecting samples of insects from human remains?
Answer:
1. Entomological evidence collection is the process of collecting evidence based on insect clues used in criminal investigations.
2.They look to get the temperature of the body. air and also look for the maggots.
Insects are used in forensic medico-legal purpose and study of this is called entomology.
When person dies the body starts to decompose by microorganism like bacteria and fungi followed by action of insects.
There are few stage of decomposition. There are many factors in which this process depend are body size, and weight , place where the body is buried ,clothing etc.
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What feature distinguishes an arteriole from a venule in a systemic capillary network?.
Arteriole carries the oxygenated blood and the venules carry the deoxygenated blood. the deoxygenated blood is given back to heart and the oxygenated blood is taken from the heart as heart is the pumping organ of our human body.
What is arterioles and venules ?Arterioles are the smaller blood vessels coming out from arteries and the capillaries together forming a network that carries the oxygenated blood in the human body.
The venules are the smaller blood vessels and capillaries coming out from veins that carry the deoxygenated blood inside them in the system of human body.
Arterioles are located on the arterial side of the system.
Thus, arterioles carry the oxygenated blood and venules carry the deoxygenated blood.
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A man and a woman have three children, all males. What is the probability that their next child will be a girl?.
Given what we know, we can confirm that the couple in question has a 50% chance that their next child will be a girl.
Why are the odds 1/2 ?This has to do with the fact that each child that the couple has is an independent event. While it is true that it is unlikely for the same event to occur many times in succession, the previous events do not influence the outcome of the next child.
Therefore, given that a child can be either male or female when born, the couple in question has a perfect 50% chance for their next child to be a girl.
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6. RNA receives information from DNA by
1 binding with a double helix as a third strand
2 matching with subunits of a single strand of
DNA
3 making an exact copy of the DNA molecule
4 accepting proteins through pores in the nu-
clear membrane
Answer:
2
Explanation:
because complementary RNA nucleotides bind with the template strand of DNA
PLEASE HELP MEEEEEE!!!!
Answer:
The answer to this question is D.
Explanation:
This is because it was affected by the wind because sand is very light. ALso, I already learned this stuff so I am kind of an expert ngl.
What kind of animals are best suited to life in a desert? A. Animals that estimate during hot weather B. Animals that nest in tall trees C. Animals that hibernate during winter D. Animals that have thick layer of blubber or fu
Answer: A
Explanation: Process of elemination. A would have to be the best option
Help me right now!
What does this mean in your own words?
The amount of carbon dioxide (CO2) in a solution is one of the many factors that determines the pH of water. As pH levels fluctuate during the day due to photosynthesis, respiration, and decomposition; the extremity of these changes depends on the alkalinity of the water which is influenced by CO2 levels. When CO2 levels increase in water, the pH level drops, which makes the water become more acidic.
Answer:
Carbondioxide will Change to carbonate
Sugars manufactured in leaves are distributed to other plants parts through the phloem by a process know as
Sugars produced in leaves which are distributed to various parts through the phloem in a process called translocation.
How sugar is distributed?Sugar which is produced in the leaves during the process of photosynthesis are sent to other parts parts of the plant body in order to promote growth of other parts.
So we can conclude that Sugars produced in leaves which are distributed to various parts through the phloem in a process called translocation.
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What is the smallest unit that can be said to be alive?.
Answer:
cells
All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular).
Explanation:
The graph shows the effect of temperature on the activity of an enzyme.
At what temperature is the enzyme producing the most product?
A 10°C
B 26°C
C 34°C
D 40°C
What can skeletal remains reveal about the identity of a person?.
Answer:
ancestry, stature, age, disease and any fatal injuries.
Explanation:
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What is the main type of weathering in deserts?
a. physical weathering
b. weathering by organic acids
c. chemical weathering
The two main types of weathering which occur in deserts are Mechanical weathering, which is the disintegration of a rock by mechanical forces that do not change the rock's chemical composition and Chemical weathering, which is the decomposition of a rock by the alteration of its chemical composition.
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The structural continuity between the cornea and the sclera is called:.
Explanation:
i think Limbus ..........
Which of the following is an example of non-consumptive water use?
A
water that enters a sewer system
B
water used for irrigation
C
water used in manufacturing processes
D
water used in food preparation
Answer:
A
water that enters a sewer system
Explanation: