A student is planning an investigation of the effect of population size on an ecosystem. She plans to use a five-gallon fish tank with ten goldfish for her investigation. How should the student perform her investigation? A. She should limit the amount of food given and observe the results. B. She should add a predator fish to the tank and observe the results C. She should continue to add more goldfish to the tank and observe the results D. She should change the temperature of the water in the tank and observe the results.
Answer:
C
Explanation:
Because the student is observing the effects on the population, so it would make more sense to add more fish to the tanks to see how they would get effected.
A student is planning an investigation of the effect of population size on an ecosystem, so she should continue to add more goldfish to the tank and observe the results, as in Option C.
What is the population size of an ecosystem?In the student's investigation, the goal is to observe the effect of population size on an ecosystem using a fish tank with goldfish. The student has already decided to use a five-gallon fish tank with ten goldfish for the experiment, so by adding more goldfish to the tank, the student can observe the effect of population size on the ecosystem. As the population of goldfish increases, the competition for resources such as food, oxygen, and space will also increase. This can lead to changes in behavior.
Hence, she should continue to add more goldfish to the tank and observe the results, as in Option C.
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what is the role of microorganisms in food preservation?
Answer:
Preservation usually involves preventing the growth of bacteria, fungi (such as yeasts), and other microorganisms.
Explanation:
Nature uses microorganisms to carry out fermentation processes, and for thousands of years mankind has used yeasts, molds and bacteria to make food products such as bread, beer, wine, vinegar, yogurt and cheese, as well as fermented fish, meat and vegetables reduce food spoilage.
^Hope it helps, Hazel^1. Some individuals of a population or species are better suited to
a. evolve than other individuals.
b. survive and reproduce.
c. become extinct.
d. achieve punctuated equilibrium.
Answer:
I believe it's b. survive and reproduce.
AB blood type illustrates the principle of
The AB blood type has both A and B alleles.This illustrates principle of co-dominance
You eat at chips and salsa at Qdoba. All that salt causes your cells to lose water through
osmosis. Your hypothalamus senses that your cells are shrinking
and sends a message to the
pituitary to release antidiuretic hormone. ADH sends a message to the kidneys to stop
releasing water in the urine. You also start to feel thirsty. The result is that your cell's water
level increases back to normal. This is an example of
A: Negative feedback
B: Positive feedback
Answer:
B
Explanation:
this is going to cause your body cells to hold water
In guinea pigs, the short hair trait is dominant. If two heterozygous guinea pigs were crossed, what would be the phenotypes of the offspring? *
A. 100percent short hair
B. 75 percent short and 25 percent long.
C. 50percent short and 50 percent long
D. 25 percent short and 75 percent long
In a separate location, take notes from the sources you've identified. The notes will provide details for your presentation
While taking notes, you may want to use these reading strategies C. Write down one or two pieces of information per
topic that you intend to use in your presentation.
Topic
Chemical reactions of fossil fuels
Difference between biomass and fossil fuels
Comparing biomass with other renewable
energy sources
Making energy choices locally
Answer:
CH4 + 2O2 -----> CO2 + 2H2O.
Explanation:
CH4 + 2O2 -----> CO2 + 2H2O is the chemical reaction of burning of fossil fuels. The main difference between biomass and fossil fuels is that biomass is biological material which can be derived from living whereas Fossil fuel such as coal, oil and gas are derived from biological material. Biomass is renewable because a new crop can be grown after each harvest, and biomass is a low carbon fuel. Biomass is renewable just like other renewable energy sources because both can be used again and again. The energy choices locally occurs according to the availability of energy resources in that locality.
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(a) troposphere
The atmosphere has five different layers that are determined by the changes in temperature that happen with increasing altitude. Living at the surface of the Earth, we are usually only aware of the events happening in the lowest layer, the troposphere, where all weather occurs
The thyroid gland produces a substance
containing iodine that helps regulate growth.
Goiter is an enlargement of the thyroid gland
caused by a lack of iodine in the diet. Goiter
is uncommon in coastal areas where people
eat seafood that contains a form of iodine.
It is more common inland, where people
eat food that has been grown in soil
lacking iodine.
Which phrase restates the cause of the
disease goiter, as given in the passage?
(1) eating too much fish
(2) eating too little of foods high in iodine
(3) exposure to a bacterium found in iodine
(4) fertilizing the soil with iodine
(5) inheriting a defective thyroid gene
Answer:
eating too little of foods high in iodine
Explanation:
Iodine deficiency lead to goiter that is why it is necessary to consume food rich in iodine like taking iodized salt or sea foods which prevent this. This lead to goiter because, your thyroid gland need iodine to repair tissues, produce thyroid hormones, aid metabolism and for proper growth,therefore deficiency of it will result in non of the following functions.
If u and y are two variables such that
du
= 4v - 3. and u = 5 when v = 2,
du/dv
find u in terms of v.
Answer:
5
Explanation:
The value of u is 5 in term of v by putting the value o v which is 2 in the formula that is du = 4v - 3. Putting the value of v = 2 we get, du = 4(2) - 3. --- du = 8 - 3. ---- du = 5. we are able to solve the question due to the presence of v value. If the v value is not present then we can't find the value of u in term of v. So we can conclude that the value of u in term of v is 5 if we put the value of v in the formula.
If the birth rate and death rate are balanced in a population, how might a population increase in size?
I
Answer:
Population change is governed by the balance between birth rates and death rates. If the birth rate stays the same and the death rate decreases, then population numbers will grow. If the birth rate increases and the death rate stays the same, then population will also grow
Explanation:
Natural increase in a population occurs where Birth rate is greater than death rate. ... Natural decrease occurs when death rate is greater than birth rate. This means that more deaths occur in a population than babies are born so population numbers decline
The population will be doubled by immigration. The correct option is C.
What is immigration?When an animal settles down in a habitat because it has resources nearby or because it is a good fit for them, this is referred to as immigration.
When an animal emigrates, it's because its habitat is no longer perfect for it and it needs to move to a new location with a better habitat.
It is the quantity of members of the same species that have entered the habitat during the time period under examination from outside the habitat.
To immigrate means to move permanently to another country. To migrate is to move, much like wintertime birds. Depending on the viewpoint, one can either migrate, immigrate, or emigrate.
Immigration can increase the size of a population if the birth and death rates are equal.
Thus, the correct option is C.
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A young woman was going on a walk through the woods when she felt a mosquito bite her. She has a history of large local reactions to mosquito bites in the past. The reactions have been so severe she has even been skin tested, but the test came out negative. After the most recent bite, she went back to the doctor complaining of swelling at the site, dizziness, headache, and nausea. Benadryl is able to help relieve some symptoms. The doctor decides to try a blood test (i.e. ELISA based test) instead to test for allergies.
Required:
a. What is an ELISA test and how is it done?
b. Which antibody would they be looking for specific in this case?
c. The doctors also ran an SDS-PAGE test using the patient's serum mixed with two different antigens: lane 1 - bee venom; lane 2 - mosquito venom. What do the results show regarding the patient’s allergies?
d. Why are there two dark blue bands in lane 2?
e. Describe what happens during this specific type of allergic reaction.
Answer: uhh
Explanation: i need points
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Hi can you help please please thank you
Answer:
10 N
Explanation:
in all honesty I'm unsure but I think it is 10N because 20N of force is pulling on way but 10N is pulling the other way so 20-10 is 10N and that's the answ
Describe the different types of traits that exist.What factors can affect these traits?
Answer:
Cardinal traits, central traits, and secondary traits.
Explanation:
There are three types of traits according to the Gordon Allport which organized traits into three levels that is cardinal traits, central traits, and secondary traits. Factors that affect these traits are the environmental factors as well as genetic factors. Some of these traits acquire by an individual through inheritance while on the other hand, other traits can get by the people through the exposure to environment that leads to the presence of that traits.
A student must complete the column on the table that list the dates of the full
moons. What are the most likely dates of the full moons? *
Dates of New Moons Dates of Full Moons
February 10
March 11
April 10
May 9
February 5, March 7, April 5, May 4
0
February 15, March 17, April 15, May 14
February 25, March 27April 25, May 24
February 29, March 31, April 29, May 28
Other:
Answer:
February 25, March 27, April 25, May 24
Explanation:
I did the science moon phases for this! I would explain if it showed the graph and everything.
Good luck with it!
The Moon's orbit, which completes one full spin in 27 days, 7 hours, and 43 minutes, is the source of this motion. It compels the Moon to move 12–13 degrees east every day. February 25, March 27, April 25, May 24 Thus option C is correct.
What is Full Moons?When the Moon fills the sky in a perfect circle, it is said to be full.
We can only view the portions of the Moon that are illuminated by other objects because the Moon doesn't create any visible light on its own.
This change causes Moonrise to occur every day around 50 minutes later and necessitates a slightly longer Earth rotation to bring the Moon into view.
Technically, the Moon's “fullness” lasts only a brief period of time.
Therefore, the Moon can appear to be full to the unaided eye for as long as three days.
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Which of the following best describes a parasite?
a. An organism that hunts and kills other organisms
b. An organism that lives in or on another organism and uses it in some way
C. An organism that helps other organisms by providing them with nutrients
d. None of the above
The oxygen cycle is closely related to which other cycle?
A. The carbon cycle
B. The nitrogen cycle
C. The phosphorus cycle
Answer:
A
Explanation:
that what i think
i don't know if I'm right
Question 9
O Mark this question
Being left-handed (represented as I) is a recessive trait. Jim and Suzie are both left-handed.
If they have a child, which of the following could be his/her genotype?
O LL
O Either Ll or II
OLI
II
SAVE AND CONTINUE
The correct option is (2) either LI or II .
The term genotype refers to the genetic component of a trait.
The phenotype is the genotype's visible manifestation.Due to the fact that an existing DNA strand is used to make a new strand, DNA replication is known as semiconservative.What does the term genotype mean?The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolize it.There are three different genotype types: hetrozygous, homozygous recessive, and homozygous dominant.Learn more about genotype brainly.com/question/20730322#SPJ2
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Which of the following are seen when the solar winds collide with Earth's atmosphere?
Auroras
Lunar eclipses
Solar eclipses
Tides
Answer:
Auroras
Explanation:
Hope this helped :)
Answer:
Auroras
Explanation:
Auroras often form near Earth's north and south magnetic poles, but sometimes they can also occur near the equator. Their position all depends on solar winds. The stronger the solar wind is, the bigger and brighter the aurora is.
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Answer: 15. Oxygen. 16. Cortex. 17. epiglottis
Explanation:
Which of the following is a disadvantage of hydrogen fuel?
Answer:
The answer is A. It is expensive to produce and transport
Explanation:
Which of the following thrive in tropical areas and absorb light?
Greener Air Plants
Grayer Air Plants
Answer: Greener air Plants
Which of the karyotypes shown is from a normal female?
Answer:
Karyotype C is from a normal female
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Answer:
B) 113
Explanation:
Answer:
If we convert 45 degrees Celcius to Farenheit, we will get 113 degrees Farenheit
Which process illustrates a feedback mechanism in plants?*
(1) Chloroplasts take in more nitrogen, which increases the rate of photosynthesis.
O
(2) Chloroplasts release more oxygen in response to a decreased rate of
photosynthesis
(3) Guard cells change the size of leaf openings, regulating the exchange of gases.
(4) Guard cells release oxygen from the leaf at night.
Antibody molecules and receptor molecules
Answer:
The first one is your answer
Chloroplasts take in more nitrogen, which increases the rate of photosynthesis illustrates feedback mechanisms in plants.
feedback mechanism is a form of system regulation that occur in living organs which help to return or restore the body to it's original normal internal condition for sustainability of living. It is also called homeostasis.
Chloroplasts take in more nitrogen, which increases the rate of photosynthesis illustrates feedback mechanisms in plants because nitrogen helps to increase the concentration of chlorophyll which is the green pigment house in chloroplast that aid the increase of photosynthesis rate in plants.
Therefore,Chloroplasts take in more nitrogen, which increases the rate of photosynthesis illustrates feedback mechanisms in plants.
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Rocks that are formed from sediment that has been compressed over time and becomes solid are called ______________ rocks *
1 point
igneous
metamorphic
sedimentary
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Answer:
Metamorphic, :b
Explanation:
Lol, hope this helps ;B
A certain lake has a volume of about 480 m³. If the total population of freshwater shrimp in the lake is 600 million, what is the population density of the shrimp in that lake?
Answer:
1,250,000 shrimps per m³
Explanation:
Population density refers to how dense an area is per unit area/volume, and it is calculated by dividing the number of individuals in that area (population) by the area/volume of that area. That is;
Population density = population (N)/volume
According to this question, a certain lake has a volume of about 480 m³ that harbors a 600 million of freshwater shrimp. This means that;
Population density of the lake = population of shrimps ÷ volume of lake
Population density = 600,000,000 ÷ 480
Population density = 1,250,000 shrimps per m³
PLEASE HELP I HAVE AN EXAM !!!
With the aid of a diagram, show how secretion of cortisol is regulated at the primary, secondary, and tertiary levels
P.S. If you do not know the answer, could you please provide the link for the site where there is an answer. Appreciate your help !!!
Explanation:
Cortisol secretion is regulated by the hypothalamic hormone, CRH, and the pituitary hormone, ACTH, in the hypothalamus-pituitary-adrenal axis. Cortisol is known as a stress hormone involved in the response to physical and/or emotional stress.
13) On Earth, water vapor occurs in the state of matter. a.) Solid Ob.) Liquid C.) Gas d.) Plasma
Answer:
Gas
Explanation:
Because when we heat water water vapour will come in the gas form
Answer:
The answer is gas
Explanation:
Sorry I don't really know how to explain, when water vapor occurs, the water rise up to the sky in the form of gas.
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