In a process called crossing over, genetic material is exchanged between homologous chromosomes. This occurs during the prophase stage of cell division.
What is crossing over?Crossing over is the unique process by which genetic material is exchanged between the non-sister chromatids of homologous chromosomes.
Crossing over occurs in the prophase stage of meiosis and ultimately results in the formation of genetic combinations in offspring that are not present in the parents.
Therefore, the process called crossing over, genetic material is exchanged between homologous chromosomes and it occurs during the prophase stage of cell division.
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an engine cut-off lanyard helps to reduce the risk of what?
An engine cut-off lanyard helps to reduce the risk of striking a person in the water with a propeller. The correct answer is option 2.
A propeller is a device with rotating blades that is used to propel a vehicle through a fluid, such as air or water. In the context of boating, a propeller is a rotating device that is attached to an engine and used to propel a boat through the water.
An engine cut-off lanyard is a safety device that is attached to the operator of a boat and to the engine's kill switch. If the operator is thrown from the boat, the lanyard will pull the kill switch, stopping the engine and preventing the propeller from causing injury to the operator or others in the water.
Therefore, an engine cut-off lanyard is an important safety feature that can help prevent accidents and injuries on the water. Option 2 is the correct answer.
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The given question is incomplete. The complete question is:
An engine cut-off lanyard helps to reduce the risk of what?
1. Stopping the engine if the oil level gets low·
2. Striking a person in the water with a propeller·
3. Starting the engine without proper choke applied·
4. Over-revving an outboard engine at idle
Analyze the pyramid representing the energy flow through an ecosystem. Select the phrases that accurately describe the flow of energy in this ecosystem according to the image here. Select all that are correct.
A) Top carnivores obtain the maximum energy from the ecosystem.
B) Herbivores have more energy available to them than carnivores.
C) There should be fewer tertiary consumers than secondary consumers.
D) Soil organisms recycle nutrients but not energy back into the ecosystem.
E) Of the energy that is available to the producer level, only ten percent is available to the tertiary consumers.
In a typical energy pyramid, herbivores have more energy available to them than carnivores, tertiary consumers are fewer than secondary consumers, and soil organisms recycle nutrients.
Energy pyramid in the ecosystemThe producer forms the bases of the energy pyramid of any ecosystem. this is followed by the primary consumers, secondary consumers, tertiary consumers, and quaternary consumers respectively.
The population at each trophic level decreases as we move up, resulting in a form of a pyramid. Also, the amount of energy obtained at each trophic level decreases as we move upward.
Thus, one can effectively conclude that:
Herbivores have more energy available to them than carnivores.There are fewer tertiary consumers than secondary consumers.Soil organisms recycle nutrients but not energy back into the ecosystem.More on the energy pyramid can be found here: https://brainly.com/question/2515928
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Identify a pattern that you observe in the bodies of the three animals shown here. The pattern could involve the shapes and locations of the eyes, mouth, or limbs. Construct an explanation for this pattern. Include either the term homologous structure or the term analogous structure in your response.
The morphology of the extremities is a pattern shared by the bodies of these three animals, which is due to evolutionary homo-logy.
What are homo-logous structures?Homo-logous structures are body structures that may or not may have the same function but share an evolutionary origin.
Conversely, analogous structures have the same functions but they are not found in a common ancestor.
In conclusion, the morphology of the extremities is a pattern shared by the bodies of these three animals, which is due to evolutionary homo-logy.
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Can u name one plant whose no part goes waste?
Answer:
mushroom
Explanation:
mushroom
Explain the DNA Replication diagram above with all the great terms from this chapter. This is a BIG ANSWER.
DNA replication or duplication is the process of making copies of DNA by the cell. It involves a series of steps and various enzymes required for the completion of the process.
What is the process of DNA replication?DNA replication has several steps along with some proteins called replication enzymes as well as RNA.
The process of replication is as follows:
Replication fork: It is made by unzipping DNA into two strands. It is done by break of the purine and pyrimidine bond accomplished by an enzyme called DNA helicase.Primer binding: After this unzipping, a short piece of RNA which is called as a primer binds to the 3' end of the DNA strand. The primer bound is the starting point for replication. Primers are generated by the enzyme referred to as DNA primase.Elongation: DNA polymerase aids in the elongation process in DNA replication. As the replication moves in the 5' to 3' direction on the leading strand, the newly formed strand will be continuous. But in the case of the lagging strand replication starts by binding with multiple primers which involve DNA polymerase and then adds pieces of DNA, called Okazaki fragments, to the strand between primers. Termination: On the formation of both the strands, Exonuclease removes all RNA primers followed by proofreading and then the adhesion of the Okazaki fragments by enzyme DNA ligase.Thus, these were the steps involved in the process of DNA replication.
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What process adds carbon dioxide to the air?
nitrogen cycle
O water cycle
respiration
Ophotosynthesis
Answer:
cellular respiration...that's breathing out of humans
and through human activities like burning of fossil fuels...
The respiration process adds carbon dioxide to the air. Therefore, option "C" is correct.
What is respiration?A metabolic process known as respiration involves an organism's living cells taking in oxygen and releasing carbon dioxide from the oxidation of complex organic substances to obtain energy (ATP). High-impact breath happens in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy. The synthetic condition is C6H12O6 + 6O2 → 6CO2 + 6H2O.
There are two types of respiration that occur in nature that is aerobic respiration and anaerobic respiration. Aerobic respiration involves the use of oxygen for oxidation and later oxygen is not used.
Therefore, respiration is the cellular process that happens in all organisms.
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4. Which of the following are examples of matter?
a. Ideas
b. Mountain
C. Chair
d. Water
e. Book
f. Air
g. Gas
h. Light
Answer:
D, C, F, E, A, B, G, H
Explanation:
These all are matter.how do structures of animals interact perform the function regulation
Answer:
Body systems interact to perform the functions of regulation, nutrient absorption, reproduction, and defense from injury or illness
Explanation:
Which protists are heterotrophs?
(Hint: Heterotrophs cannot make their
own food.)
A. fungus-like and plant-like protists
B. plant-like protists
C. animal-like and fungus-like protists
D. plant-like and animal-like protists
What are Exxon-Valdez and Deepwater Horizon?
A. The new desalination plants in California to fight the drought.
B. The source of massive oil spills.
C. Solar energy companies set to end reliance on oil.
what is the name for a bright red, spicy curry sauce often served with raita?
In the hierarchy of organisms, the ecosystem
level is the first that includes which of the
following?
A. biotic factors
B. abiotic factors
C. niches
Answer:
B
Explanation:
In the hierarchy of organisms, the ecosystem level is the first that includes abiotic factors. The correct option is B.
What is a hierarchy of organisms?
The systemic classification of organisms into levels, such as the Linnaean taxonomy, is referred to as biological hierarchy (a biological classification set up by Carl Linnaeus).
It arranges living things into kingdoms, phyla, classes, orders, families, genus, and species in order of decreasing complexity. The eight levels of the present taxonomic hierarchy, from lowest to highest, are as follows: species, genus, family, order, class, phylum, kingdom, and domain.
A multicellular organism's body is organized at many levels, beginning with the cell. Organs are formed from tissues, which are composed of cells. Organs are arranged into organ systems, and then an organism is formed.
Therefore, the correct option is B. abiotic factors.
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3. What is the difference between saponifiable and nonsaponifiable lipids?
Answer:
the difference is that unsaponifiable lipids do not contain fatty acids at least not as a component of the fundamental structure whereas saponifiable lipids do have fatty acids.
Explanation:
As a further explanation unsaponifiable lipids are lipids that do not contain fatty acids as components of the fundamental structure. On the other hand, complex also known as saponifiable lipids do contain fatty acids, and those fatty acids can be released in a process called saponification which is caused by alkaline hydrolysis.
Imagine a balloon is made from a membrane that's permeable to water but not sucrose molecules. If the balloon is filled with a pure water and then placed in a beaker of 50% sucrose solution, then the balloon will
The size of the balloon would increase.
Describe what happens during interphase
Answer:
the cell grows and the nuclear DNA is duplicated
Answer:
DNA replication takes place during interphase
what type of organisms take in atmospheric carbon dioxide?
Give an example of a negative feedback loop.
me animation on constructing the water cycle. Once you have completed a correct water cycle, include a paragraph of the process, and how certain steps of the process may affect you.
What is resource partitioning?
A. dividing up resources among organisms in an
ecosystem
B. pushing a species out of an ecosystem due to a
lack of resources
C. competing with another species until they
become extinct
D. moving of organisms to find new food
resources
Answer:
A. dividing up resources among organisms in an ecosystem.
The graph below shows the number of radioactive atoms present in four radioactive materials at different time intervals. Graph showing the time in hours on x axis and the number of radioactive atoms present on y axis for four materials A, B, C, and D. Curve A is on the left of the graph with curve B on its right. Curve C is on the right of curve B and curve D is to the right of curve C. The slope of curve A is the greatest, the slope of curve B is lesser than the slope of curve A but greater than the slopes of curve C and curve D. The slope of curve C is lesser than the slopes of curve A and curve B, but greater than the slope of curve D. The slope of curve D is the least.
Answer:
Its not C I think it's B
Explanation:
I took the test and i guessed C and it was wrong but I think B makes the most sense.
Homeostasis is the condition the body is in when all substances or variables in the body are at an ideal state. If necessary, feedback mechanisms kick in to maintain homeostasis by producing hormones. The pancreas is a gland that produces the hormones insulin and glucagon. How do the hormones of the pancreas maintain homeostasis?
Together the insulin and glucagon help maintain a state is known as homeostasis in which conditions inside the body remain steady.
What is homeostasis?Homeostasis refers to the mechanism of the body to maintain a stable internal environment instead of changes taking place in the external environment.
When blood sugar is too high, the pancreas secretes more insulin. When blood sugar levels drop, the pancreas releases glucagon to raise them.
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Can someone please help !
If an aquarium holds 80 l of water and contains 170 guppies, what is the approximate density of the guppy population?
The approximate density of the guppy population is 2 guppy/L.
What is Population?The population may be defined as the number of individuals of the same species living in a particular area at a given time.
The capacity of the Aquarium to hold water = 80L.
The total number of guppies = 170.
Density = 170/80= 2.125.
Therefore, the approximate density of the guppy population is 2 guppy/L.
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Which result would be expected from comparing ATP yield in cellular respiration in plants and animal cells?
There would be no difference
There would be 50% more in plant cells
There would be 25% more in animal cells
O Plant cells make 38 ATP for every 4 ATP made by animal cells
The result that will be expected from comparing ATP yield in cellular respiration in plants and animal cells is : ( B ) There would be 50% more in plants cells
Difference between ATP yield in plant and animal cellsATP is produced in the mitochondria during cellular respiration of plant and animal cells. Given that plants possess chloroplast which performs photosynthesis, this helps with an increase in the ATP yield in plant cells.
Therefore the 50% more of ATP yield will be present in plant cells when compared to ATP yield in animal cells.
Hence we can conclude that there would be 50% more in plants cells
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. Take 400ml milk, curd, four small clean jars with lids labelled A, B, C and D. Pour about 100 ml of lukewarm boiled milk into each jar. Add a teaspoon of curd to jar A and D. Place jar D in a refrigerator. Place jars A, B and C in a warm place. Observe the jars after four to five hours and answer these questions.
i) What do you see in jars A, B and C?
ii) Why did the milk in jars B and C not set into curd?
iii) What happened in D? Can you say why?
1. The milk will be turned into curd in bowl A due to the lactobacillus bacteria and not in other bowls B, C.
What is lactobacillus bacteria?
Lactobacillus is the bacteria required for the formation of curd and it requires an appropriate temperature for its growth. Lukewarm milk not being very much cool and hot provides that appropriate temperature and hence lukewarm milk get converted into milk.
2. Bowl B and C contains hot and cold milk that do not provide required temperature for the growth of bacteria due to which bacteria does not grow in them and they are not converted into curd.
3. Bowl D placed in refrigerator, so the the bacteria unable to divide because they does not get the required temperature and doesn't changed into curd.
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6 The primary function of a plant's roots is to
(1) absorb water
(2) perform photosynthesis
(3) produce seeds
Answer:
1
Explanation: The roots of seed plants have three major functions: anchoring the plant to the soil, absorbing water and minerals and transporting them upwards, and storing the products of photosynthesis.
A hypothesis that girls have better memory than boys
Answer:
If a group made up of 50% boys and 50% girls is asked to read a passage, then the girls will remember more of what they read than the boys because girls have better memories than boys.
Explanation:
A hypothesis is a statement that explains what you think will happen in an experiment and why. It is framed as "if...then...because." The "because" part should be based on research and not personal opinion. A good hypothesis will be more than a single sentence, and will cite research on the subject.
Why is it more difficult to treat a malignant tumor than a benign tumor?
Answer:
Explanation:
Benign tumors also usually don't need treatment. If the tumor is impacting a nearby area or causing other problems, you may need surgery to remove it. Cancerous tumors almost always require treatment with surgical removal, radiation therapy, or chemotherapy.
The texture of a single melodic line without accompaniment is:
Answer:
Monophony
Explanation:
Which animal is native to a different part of the world than the other two?.
