Answer:
A
Explanation:
new combinations of alleles from both parents
Crossing-over results in new combinations of alleles in our cells. The correct option is a.
What is crossing over?Crossing over is a process of meiosis in which the chromosomes of similar types line up. One chromosome is from the father and the other is from the mother. The exchange of genetic material across homologous chromosomes is known as crossing-over. It results in new gene combinations on each chromosome.
When cells divide during meiosis, homologous chromosomes are dispersed randomly to daughter cells, while distinct chromosomes segregate independently of one another.
A new combination of alleles results due to crossing over, and it causes variation in offspring.
Therefore, the correct option is a. New combinations of alleles.
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Does sound travel faster in a warm room or a cold room?
Edplain your answer.
Answer:
Answer and Explanation: Sound travels faster in a warm room because the molecules are moving faster.
During ovulation, the ________ ruptures and the oocyte enters the uterine tube; later, the empty follicle undergoes structural and biochemical changes and a __________ is formed.
The follicle ruptures which releases the ovum into the fallopian tubes. The follicle then turns into a corpus luteum.
Which of the following is something you should do after severe weather occurs?
Clean up flood waters.
Cleaning up will always be the step after the storm. Assuming they're talking about a hurricane, then the flood waters would need to be cleaned up. Besides for the last choice (which is utterly ridiculous!), those should be before and during the storm.
Depending on where you live and what kind of sever weather you encounter, a safety plan for you and your family is a must. You should always know where you can go to be safe from the elements and what to do during severe weather.
During the storm, stay away from windows. This pertains to all weather, including those with wind and lightning. Wind could blow debris that could possibly shatter glass and hurt you or others. With lightning, if it strikes the window, it will shatter it, merely from the heat of the contact.
HURRY
Oxygen and carbon combine to form different compounds. What type bond is formed between these two atoms?
options:
hydrogen
ionic
covalent
Answer:
C.) Covalent
Explanation:
Oxygen and carbon are both nonmetals.
A.) is incorrect because hydrogen bonds are only formed between hydrogen and either oxygen, nitrogen, or fluorine.
B.) is incorrect because ionic bonds form between nonmetals and metals. In this situation, you have two nonmetals.
C.) is correct because covalent bonds are formed between two nonmetals. A covalent bond will form because oxygen and carbon are nonmetals.
Answer:
Covalent
Explanation:
A covalent bond is formed when two non metals form, which means that's the answer. For the record, for hydrogen bonding Hydrogen obviously has to be present, and an ionic bond occurs between a metal and a nonmetal
Can anyone help me with this question again? Thanks so much
Food is prevented from entering the trachea because:
A. Trachea will constrict during swallowing
B. Oesophagus will dilate during swallowing
C. Glottis will constrict during swallowing
D. Larynx will be raised during swallowing
A, B, C, D are the options pls choose one
give useful and solid answers pls
which of the following statements related to chemical bonds is false? Atoms are the most reactive when they have a full outer energy level. Atoms form chemical bonds to achieve a full outer energy level. Atoms can bond together to form entirely different substances. Chemical bonds make an atoms arrangement of electrons more stable.
Answer:
Atoms are the most reactive when they have a full outer energy level.
Explanation:
Atoms are the least reactive and most stable when their outermost electron shell is full.
Which bond type shares electrons
between the atoms?
A. ionic bond
B. covalent bond
C. proton bond
D. neutron bond
True or False In addition to earth, many of the other planets in the solar system have atmospheres.
Answer:
true
Explanation:
however this is true the atmosphere cannot support any human life because of its content
Answer: True, some others planets too have an atmosphere.
Explanation:
Yes, it is true. Some other planets such as Mars, Jupiter, Saturn have atmospheres.
What trait separates a platypus from a brown bear on this cladogram?
hair, mammary glands, lays eggs
placenta
retractable claws
ability to purr
Explanation:
a platypus is the only mammal to lay eggs
Answer:
hair, mammary glands, lays eggs
Explanation:
it is what it is
HURRY
Look at this diagram of sulfur. What is the most likely thing that will happen to complete the outer shell?
options:
donate 2 electrons
donate 6 electrons
accept 6 electrons
accept 2 electrons
Answer:
Accept 2 electrons
Explanation:
Elements are most stable when their valence shells are filled. Since sulflur lies within the third row in the p-block, it wants 8 valence electrons. However, according to the diagram, it only has 6 valence electrons. The simplest way to having a filled outermost shell is the one which involves the least amount of electrons being added or donated to the element. In this case, the fastest way to a stable element is by adding 2 valence electrons (6 + 2 = 8).
If 10 typica moth and 90 carbonaria moth were released into a polluted forest what would happen over several generations?.
What would happen over the several generations when typica moth and carbonaria moth are released into a pooluted forest are :
The typica moth population would decrease The carbonaria moth will have a reproductive advantage in the polluted forest Industrial melanismThe concept in this question is indutrial melanism because the carbonaria moth ( dark colored ) will have an advantage over the typica moth because it can easily camouflage itself from predators. While the typica moth ( brown colored ) can be easily spotted by predators and this will leed to a population decreas in the typica moth.
Hence we can conclude that What would happen over the several generations when typica moth and carbonaria moth are released into a pooluted forest are :The typica moth population would decrease The carbonaria moth will have a reproductive advantage in the polluted forest.
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When you use electricity in your home, which resources are powering it? Research the energy resources used to power your state’s electrical grid (that’s what supplies your home with electricity). In the space below or on a separate sheet of paper, create an informative handout to provide to the people of your state.
Include the following information in your handout:
• Which state do you live in?
• What is the population of your state?
• What percent of the electricity in your state comes from
nonrenewable resources?
• What percent of the electricity in your state comes from
renewable resources?
• What percent of the electricity in your state comes from
nuclear energy?
• Which renewable resource is used the most in your state?
• What is an interesting fact about energy usage in your state?
Answer:
Comment which state you live in an I'll be able to help
Explanation:
Why was Aristarchus’s model not accepted? Select two options.
Aristotle had better data than Aristarchus.
Aristarchus was not as famous as Aristotle.
Aristotle’s model was more accurate.
Aristarchus could not answer some important questions about the model.
Aristarchus had fallen out of favor with Alexander the Great.
Aristarchus’s model not accepted because at that time it was believed that the earth was at the center of the universe.
What is Aristarchus’s model?Aristarchus make a model by placing the place of the Sun in the middle of the solar system and placed the planets around the Sun.
So we can conclude that Aristarchus’s model not accepted because of the believed that the earth was at the center of the universe.
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The Answer is
B - Aristarchus was not as famous as Aristotle.
D - Aristarchus could not answer some important questions about the model.
Which represents the cross between parent plants if one is heterozygous and has yellow-colored pods and the other is homozygous and has green-colored pods? yy ´ yy yy ´ yy yy ´ yy yy ´ yy
The cross between parent plants if one is heterozygous and has yellow-colored pods and the other is purebred and has green-colored pods is Yy×yy.
What is Heterozygous?Heterozygous may be defined as the existence of two distinguishable alleles at a distinct gene locus.
In this condition, Yellow is dominant over green i.e. Y>y. Heterozygous means the existence of two distinguishable alleles at a distinct gene locus. So, the genotype of one parent is Yy, while the other parent is purebred and has green-colored pods. Hence, the genotype is yy.
Therefore, the cross between parent plants if one is heterozygous and has yellow-colored pods and the other is purebred and has green-colored pods is Yy×yy.
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Answer:Yy yy
Explanation:
How do flowers help other organisms in our environment?
Explanation:
they beatify our environment ,with their attractive scent and and colour
Sayid listed some characteristics of waves in a chart. Part of his chart is shown.
A 1-column table with titled Characteristics of Waves. The column labeled Electromagnetic Waves has entries travel in straight lines, move only through matter, involve interactions with magnetic fields.
Which of these would correct Sayid's error?
Change the heading of the chart to “Mechanical.”
Replace “travel in straight lines” with “move in curved paths.”
Add “move due to particles bumping into each other” to the chart.
Change “move only through matter” to “move through space and matter.”
Answer:
Change “move only through matter” to “move through space and matter.”
Explanation:
Electromagnetic wave like light can travel thru both space and matter. Ever tried to shine a flash light thru a water bottle? The light passes thru the water and the bottle (both are types of matter: liquid and solid) and reaches the other side.
Ever see Suns ray enter your eyes? The light travels thru the vast empty space (our solar system) to reach earth.
Thus, electromagnetic waves can move thru both space and matter.
Electromagnetic waves have the ability to move through matter as well as through space. So the correct option is Option D.
What are the characteristics of Electromagnetic waves?An electromagnetic wave is a type of radiation that travels through space. Electromagnetic waves form when an electric field meets a magnetic field.
Electromagnetic waves do not require molecules to travel. Unlike sound waves, which travel through matter by smashing molecules together, electromagnetic waves cannot travel through a vacuum such as space. Instead, they can travel through the air, solid matter, and even space. This makes electromagnetic waves very useful for many technologies.
There are many different types of waves in the electromagnetic spectrum, ranging from radio waves that are as long as a building to gamma rays that are smaller than a nucleus of an atom.
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Order the steps of the hydropower plant below.
Answer:
water flows through a pipe, or penstock, then pushes against and turns blades in a turbine to spin a generator to produce electricity.
Answer:
Explanation:
ANSWER: water flows through a pipe, or A penstock, then pushes against and turns blades in a turbine to spin a generator to produce electricity.
Answer the q for the love of god
Answer:
The student is testing "Do plants need air to grow?"
Explanation:
Each plant is given soil, a pot, and water. These are constant throughout the entire experiment, meaning they are not being testing. Therefore, the only possible answer is "Do plants need air to grow?". And looking at the growing conditions, it is likely since putting a closed plastic bag closes off air from the plant.
Answer:
plants need air to grow
Explanation:
because it is out in a fresh air environment it will thrive
without air it would not survive just like we need oxygen without it we will
die. hope this answered your question.
Explain how parts of a whole system contribute to the function of a whole system?
Every organ system is made up of parts that contribute to the functions of the whole system.
How do parts of the system contribute to the function of a whole system?The human body is made up of many parts that have specific functions that come together to make up the whole organ system. Scientists divide them into different parts and different organ systems to better understand the individual functioning of the specific parts.
A body system is made up of body parts that work together to carry out a particular function. For example, the integumentary system that consists of skin, hair and nails that integrate together to carry out the function of protecting the body.
Another example is that of the immune system that is made up of complex organs, tissues and cells like the WBCs that form a network among each other to carry out the function of recognizing antigens and destroying them to keep infections at bay.
Two or more body systems also work together to carry out a certain function. For example the respiratory system and circulatory system come together to provide oxygen to the cells of the body and remove carbon dioxide.
This is how parts of the whole system contribute to the function of the whole system.
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Which piece of evidence, if discovered, would most directly contradict the current model for how Earth’s oceans and atmosphere formed?
Answer:Water covers about 70 percent of the Earth's surface, but where did it come ... These two pieces of evidence would favor an asteroid origin.
Explanation:
Answer:
B. Comets meteoroids, and asteroids in the solar system contains no ice.
Explanation:
Was right for me
which aquatic biomes is characterized by its extreme fluctuations in temperature and salinity?
Answer:
Estuaries
Explanation:
Estuaries are often categorized by their mix of fresh and salt water communities, leading to differences in temperature and salinity.
The circulatory system helps maintian homeostasis by interacting with the
Answer:
Blood vessels
Explanation:
The carbon cycle is a process that involves:
A) The creation of carbon atoms
B) Physical Changes for carbon molecules
C) Both B & C
D) All of the above
Answer:
All of the above
Explanation:
Carbon atoms are created during the process of photosynthesis. During this process, plants will absorb carbon dioxide and sunlight to create energy, glucose, and other sugars. And for the physical changes of carbon molecules, carbon can undertake multiple changes overtime. Even though this element can be stored in the Earth for millions of years, it can be transferred in seconds from one object to another
if a hypothetical Colony of 100 humans isolated themselves on an island their genetic make up after several generations would be determined by?
Answer:
The founder effect.
Founder Effect: What is it?The founder effect is the lasting, reduced genetic-diversity that comes whenever a population is descended from small numbers of colonized ancestors.
What is a enzyme and how does it work in the body
Answer:
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems. Enzymes in our blood can also help healthcare providers check for injuries and diseases.
Why is the concentration of urea in urine much higher than its concentration in the glomerular filtrate
Answer:
This is caused by osmosis and re-absorption.
what is the reason mountains exist
Answer:
Mountains are produced by forces in the earth that cause parts of the earth's crust to rise while others sink.
Explanation:
Uplift of the crust, combined with chemical and physical erosion by air, water, and ice over millions of years, produces the spectacular scenery found in mountains
Where on the chromosome is the “purple eye” gene located?
Answer:
Chromosome 2
Explanation: Have any amazing day!
HELP! Me!
Peppered moths live on lightly colored trees, lay around 100 eggs and don’t live longer than a year. How does that help them adapt and survive?
Answer:
They camouflage
Explanation:
The peppered moths adapt to their surroundings. They blend in with their surroundings to avoid being eaten by their predators. Blending in with their surrounding also helps them to sneak up on and catch their prey.
I'm not too sure why they lay 100 eggs at a time but i think it's because the parents want to increase the survival of their eggs. Eggs sometimes are eaten by other animals and the parents want at least a few to survive.
How the dorsal/ventral pattern is initially established in drosophila development
The dorsal/ventral pattern is initially established in drosophila development by the gradient of a transcription factor called dorsal protein.
What do you mean by Dorsal protein?Dorsal proteins are synthesized after fertilization, when dorsal is translated, it forms a complex with a protein known as cactus in the cytoplasm.
The dorsal/ventral axis in the Drosophila is determined by morphogenesis which is established by 12 maternal effect genes along with the dorsal and cactus.
Therefore, the dorsal/ventral pattern is initially established in drosophila development by the gradient of a transcription factor called dorsal protein.
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