In humans, if a non-disjunction event led to an individual with a genotype of XXY, they would be male because they have a Y chromosome.
What are X and Y chromosomes?The X chromosome and Y chromosome are homo-logous chromosomes that determine the se_x in mammals.
The presence of the Y chromosome is indicative of the males, whereas two X chromosomes are females in normal conditions.
Non-disjuntion refers to the faulty separation of homo-logous chromosomes during meiosis.
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Identify other land resources found on earth. Describe one use for each resource.
1.__
2.__
3.__
4.__
5.__
what energy does burning a match put off
18 The size of a mouse population in a natural
ecosystem tends to remain relatively constant due to
A. the cycling of energy.
B. the lack of natural predators.
C. the increased numbers of decomposers.
D. the carrying capacity of the environment.
Answer:
D- the carrying capacity of the environment.
Explanation:
The limiting factors also called as the carrying capacity of the environment keeps the size of a mouse population in a natural ecosystem constant. Therefore, option (D) is correct.
What is a limiting factor in a ecosystem?Limiting factors are physical, biological, and ecological conditions that:
(1) Limit the ecosystem's ability to sustain native plant and animal populations and to accommodate natural disturbances like floods;
(2) Limit the quality or availability of habitat that supports all life stages of native species; and
(3) Limit the ecosystem's ability to sustain the local tribal culture.
The only natural factor limiting the number of mice in the home is a scarcity of resources such as food. Therefore, The limiting factors also called as the carrying capacity of the environment keeps the size of a mouse population in a natural ecosystem constant.
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what is a DNA structure
Answer:
DNA is a two-stranded molecule that appears twisted, giving it a unique shape referred to as the double helix. Each of the two strands is a long sequence of nucleotides or individual units made of: a phosphate molecule. a sugar molecule called deoxyribose, containing five carbons.
ATP is a nucleotide which stores energy, true or false
Answer:
False
Explanation:
Will earth run out of water?
While our globe may never run out of water as a whole, it's crucial to realize that pure freshwater isn't always available where and when humans require it. In fact, only six countries contain half of the world's freshwater. Over a billion people do not have access to adequate safe, clean water. Water scarcity will afflict the entire planet by 2040 unless water use is significantly decreased. "If we keep doing what we're doing now, there will be no water by 2040."
Under what circumstances would a food pyramid be a more useful model than a food chain?
Answer:
A food chain represents the linear relationship between organisms for food. On the other hand, a food pyramid represents the optimal number of servings to be eaten each day from each of the basic food groups.
Food pyramid represents the total number of food to be eaten each day from each of the basic food groups .A food chain represents the linear relationship between organisms for food.
What is food chain?
Food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.
What is food pyramid?Food pyramid is a depiction of the optimal number of servings to be eaten each day from each of the basic food groups.
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The united nations defines a megacity as having at least how many inhabitants?.
Answer: 10 million people
Explanation:
A megacity is defined as a city with a population of at least 10 million.
Ex: New York, US; Tokyo, Japan; Shanghai; China
Why is less atp obtained from the average carbon in a sugar molecule than from a carbon in a fat molecule?.
Answer:
Why is less ATP obtained from the average carbon in a sugar molecule than from carbon in a fat molecule? The correct answer is not given. The sugar carbons require more water weight during cellular storage. The carbons in fatty acids are a more oxidized form of carbon than those in sugars.
During _____, the homologous chromosome pairs independently align themselves at the equator of the cell.
Answer:
Prophase I
Explanation:
During prophase I, homologous chromosomes pair up and exchange sections of DNA.
During prophase I, the homologous chromosome pairs independently align themselves at the equator of the cell.
What happens in prophase I?DNA replication precedes the start of meiosis I. During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent.
Moreover, during prophase I, the complex of DNA and protein known as chromatin condenses to form chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at a central point called the centromere.
Therefore, during prophase, the chromosomes in a cell's nucleus condense to the point that they can be viewed using a light microscope. Prophase is the first phase of mitosis. During this phase, the chromosomes inside the cell's nucleus condense and form tight structures.
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27.
Scientists believe that Earth's early atmosphere
changed in composition as a result of
A. the appearance of oxygen-producing organisms
B.
the drifting of the continents
C.
the changes in Earth's magnetic field
D.
a transfer of gases from the Sun
Answer:
The answer is A
Explanation:
The appearance of oxygen-producing organisms.
The appearance of free oxygen in Earth's atmosphere led to the Great Oxidation Event. This was triggered by cyanobacteria producing oxygen that was used by multicellular forms as early as 2.3 billion years ago.What are cyanobacteria?Cyanobacteria are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see.Cyanobacteria are responsible for the Earth's transition from a carbon dioxide-rich atmosphere to the present relatively oxygen rich atmosphere as a consequence of oxygenic photosynthesis.To know more about multicellular here
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Canopus is 313 light years from Earth. How old is the light that we are currently seeing?
Answer:
313 years old because ye4s im smart a enginner i know how to spoll cause i ahave all as
Explanation:
what causes blue whales to grow so large
Answer:
Stronger upwelling created the right conditions for baleen whale prey, such as krill and forage fish, to become concentrated in dense patches along coastlines. Whales that fed on these prey resources could forage efficiently and predictably, allowing them to grow larger.
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What are the two divsions of the peripheral nervous system?
Answer:
The answer will be somatic nervous system and autonomic nervous system.
Explanation:
Nervous system contain many interconnecting nerves that helps brain to respond according to stimuli. The nervous system is divided into central and peripheral nervous system. Peripheral nervous system again divided into the somatic nervous system and the autonomic nervous system.
What is nervous system?The peripheral nervous system consists of nerves that comes out from brain and spinal cord.
These nerves helps to form a network for communication between central nervous system.
Peripheral nervous system is divided into:
Autonomic nervous system: It is visceral efferent system as it sends motor impulse to visceral organs.Somatic nervous system: It contain sensory and motor neurons that sends and receive sensory information from motor neurons.Thus, there are two divisions of peripheral nervous system, these are autonomic and somatic nervous system.
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Protozoa are often found in what kind of environment?.
What is the period of time that elapses between the generation.
Answer: should be:
The latent period.
Explanation:
:)
Which type of circulatory system is most likely present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells?
A closed circulatory system is present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells.
What is the circulatory system?
The circulatory system is an organs system that works to carry out blood cells to all cells in the body.
The circulatory system is fundamental for transporting oxygen and nutrients to all cells of the body.
A closed circulatory system is a special organ system where the blood cells are not circulating in body cavities.
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The type of circulatory system is most likely present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells is closed circulatory system.
What are the types of circulatory system ?
Almost all multicellular organisms want a circulatory system to move oxygen and vitamins thru the body. Evolution has brought about the lifestyles of styles of circulatory structures namely: open circulatory system and closed circulatory system.
Closed circulatory system is located in vertebrates and some invertebrates like earthworms. This system has vessels that behavior blood at some point of the body.: is located in vertebrates and some invertebrates like earthworms. Blood and interstitial fluid are distinct and it has the nlood flowing inside the capillary.
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Which of these does NOT greatly affect climate?
Note: Answer using the exact words from one of the answers so it is less confusing
Earth's Tilt
Angle of Sunlight
Seasonal Changes
Location on Earth
Answer:
angle of sunlight
Explanation:
im pretty sure its this bc all the other answers greatly affect climate
Based on the diagram, what would happen if Earth had no atmosphere?
Diagram of greenhouse effect showing the sun, atmosphere, and human activities that release greenhouse gases. The diagram shows that sunlight is reflected back to space by the atmosphere, absorbed at the surface, and reflected by the surface. Greenhouse gases trap heat from the sun. Examples of human activities include CFCs and haloalkane from refrigerators and aerosols, nitrous oxide from gasoline and agriculture, methane from cattle and fertilizer, and carbon dioxide from oil and coal.
Human activities would not release greenhouse gases.
Greenhouse gases would not trap heat from the sun.
Sunlight would not be absorbed at the surface.
Surface temperatures would be maintained.
Based on the diagram, we can confirm that if Earth had no atmosphere, Greenhouse gases would not trap heat from the sun.
Why would these gases not trap heat from the sun without the atmosphere?Greenhouse gases are located in the atmosphere, therefore, without it, they would not be able to trap the heat from the sun. Although high concentrations of these gases are a modern problem in global warming, these gases are a natural part of the earth and are necessary to maintain livable temperatures at the surface of the earth.
Therefore, we can confirm that if Earth had no atmosphere, Greenhouse gases would not trap heat from the sun.
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Answer:
Greenhouse gases would not trap heat from the sun.
Got it right. Have a great day!
5which of the following
does not describe
the structue of DNA
Answer:
C. contains adenine-guanine pairs
Explanation:
how does gene flow affect population's genetic variation
Answer:
increase the genetic variation of the population
Explanation:
hope this helps
6. What happens to the energy that does not move up to the next trophic level?
The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat
50 Points
8. Why does Australia have so many genetically distinct organisms?
Answer:
Australia has so many genetically distinct organisms because it has been separated from other bodies of land for a very long time. This has given species in Australia a long time to evolve independently from species in other areas of the world.
HELPPP I AM STUCK WITH THIS PROBLEM !
Answer:
All red boxes should be filled with Hh.
Explanation:
The genotype should 100% be Hh, due to the dominant (H) existing in all boxes (which represents the possibilities of the likelihood of inheriting a family trait). This means the likelihood of inheriting 2 horns is 100%.
give Two differences between monocotylidon and dycotiledon.
Answer:
In the screenshot
Explanation:
Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Have a wonderful day!
11. If you wanted to obtain 100% roan calves, what would the parents' genotypes need to be?
If you wanted to obtain 100% roan calves, then it si required to cross parents who are homo-zygous (pure lines) for the genes associated with this trait.
What is a homo-zygous individual?A homo-zygous is an individual who has the same gene variants or alleles for a given gene locus.
Conversely, a heterozygous is an individual who has different gene variants or alleles for a given gene locus.
In breeding, pure lines (or purebred) are homo-zygous individuals that may be crossed to obtain the desired trait in the descendence.
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Which protist group produces much of the oxygen on earth?.
The minerals hematite and magnetite are sources of
a iron
b. lead.
C. Zinc
d. copper
Which fields would most likely make use of spectroscopy techniques? select 4 options. food production medical research scientific research space research weather forecasting
Spectroscopy refers to the study of color from visible lights to all bands of electromagnetic spectrum. It can be used in fields including medical research and scientific research.
What is spectroscopy?Spectroscopy is done for studying structure of atoms and molecules. It is done by emitting large numbers of wavelength, to make the structure visible.
Scientist use this technique to calculate relative velocities of supernova and galaxies. in medical field it is proven effective to fight cancer.
Thus, options b and c are correct.
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Naomi runs a computer simulation for a population of mice in a meadow ecosystem. The simulation begins with 100 mice, divided equally among brown and white variants. The variants are similar apart from their body color. A mating of a white and brown mouse may produce a speckled mouse, which is mostly brown with some white markings. The table shows the numbers of each mouse variant over 7 reproduction cycles. Only adult mice are reported in the table.
Which of these events did the computer MOST LIKELY include in its simulation?
A. After cycle 2, a disease arrived that affected white mice only.
B. After cycle 2, a predator arrived that saw white mice more easily than brown mice.
C. After cycle 4, brown mice and white mice began living separately, and stopped interbreeding.
D. After cycle 4, a predator arrived that saw white mice more easily than brown mice.
E. After cycle 4, a disease arrived that affected brown mice only.
After cycle 4, a disease arrived that affected brown mice only was most likely included in its simulation.
What is Disease?This is defined as any harmful deviation from the normal structural or functional state of an organism.
This usually leads to death and the table shows a steady decline from cycle 4 which means a disease most likely arrived which affected brown mice only.
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