Answer:
involuntary muscles can be defined as the muscles that functions or contracts without conscious control and are controlled by the autonomic nervous system.
Answer:
involuntary: A muscle movement not under conscious control e.g. the beating of the heart.
What is the purpose of crossing-over in meiosis?
A.to create mutations in gametes to increase variation
B.to randomly separate homologous chromosome pairs
C.to reduce the number of chromosomes in gametes by one half
D.to create new combinations of DNA on homologous chromosomes
Answer:
A
Explanation:
During prophase I of meiosis, crossing over that occurs between non-sister chromatids of homologous chromosomes pairs occurs at chiasma results in the exchange of genetic material. This produces new genetic combinations in gametes leading to variation.
Most leopards are golden in color with large, circular black spots to provide camouflage. There is one gene that controls the amount of pigments produced by a cell in order to create that color. A mutation on that gene can have any of the following effects. Which is the most likely result of a mutation if the leopard lives in a dense forest?
a white leopard, with albinism
a normal colored leopard
a black leopard, with melanism
no leopard, it would not survive the mutation
what is the relation between cell cycle disruption and cancer?
I need help!!!?
mportant vocabulary continued:what is the difference between a unicellular organism and a multicellular organism?
Answer:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. ... Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions.
Explanation:
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Only a few natural elements have a greater density than gold. They are: ??
15 POINTS AND BRAINLIEST FOR CORRECT ANSWERS!!!
Plutonium
Neptunium
osmium
let me know if it's correct or not, these were the only ones I could think of.
Few natural elements have a greater density than gold are plutonium, neptunium, and osmium.
What is an element?
An element is define as a type of substance that is impossible to break into smaller pieces by the help of chemical process. There are several rules that should be followed at the time of assinging name of the elements. The first rule is name of the element is not a proper noun. The second rule is the symbols of the element that must be of one or more than one symbol.
Density is define as the mass per unit volume it means that 1 kg mass present in 1 meter cube is called density, density is also states that the how compact an material.
Mathematically
Density = mass/volume
S.I unit of density is kg/m^3
Density is higher in solid as compare to liquid and density of liquid is higher than gas so density is in order of SOLID>LIQUID>GAS. So we know that solid is compact in nature as compare to liquid and gas.
Therefore, Few natural elements have a greater density than gold are plutonium, neptunium, and osmium.
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Arrange the cards to group the correct organelle, function and image together.
This organelle upports and
protects the plant cell
cell Wall
IX
Drects al cell activities. The
*Control center of the cell.
Where DNA Is held
DNA
This orgonelle stores water,
and nutrients of a plant
cell. It can increase of
decrease in se
The assembly workers of
the cell. This orgonelle
makes proteins
The cow genenc normation
Used for making proteine
Determines what goes
n/out of a coll. This
organelle protects and
supports both the animal
and plant colla
The gol-like substance
where most of the cell's
activities take place
Nucleus
Cytoplasm
cell
Membrane
Vacuoje
Ribosome
Answer:
cell wall protects and supports the plant cell
nucleus is the control center of the cell
vacuole stores water
ribosome is the assembly workers
Explanation:
The golden-cheeked warbler and the black-throated green warbler look nearly identical to each other. What type of information could be used to determine if the birds are separate species? Select all that apply. The birds breed with each other where their territories overlap. The birds breed with each other where their territories overlap. The birds show differences in mating songs and behaviors. The birds show differences in mating songs and behaviors. The birds do not breed with each other where their territories overlap. The birds do not breed with each other where their territories overlap. The birds compete for food and nesting sites. The birds compete for food and nesting sites.
Answer:
The birds do not breed with each other where their territories overlap.
Explanation:
The correct answer would be that the birds do not breed with each other where their territories overlap.
A species consists of organisms that are phenotypically similar and are capable of mating to produce fertile progeny.
Hence, the first thing to establish that two organisms are not of the same species is the inability to breed with each other. If an eventuality occurs and they are able to breed, the resulting progeny would be invalid.
Therefore the fact that the golden-cheeked warbler and the black-throated green warbler do not breed with each other where their territories overlap is enough information to determine that the birds are separate species.
What are some factors that can cause observed evolutionary change?
Answer:
There are four such forces: mutation, gene flow, genetic drift, and natural selection.
Explanation:
Answer:
natural selection, random genetic drift, mutation, population mating structure, and culture.
Explanation:
I hope this helps! ^^
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Why does mutation happen regularly? *
Answer:
Explanation:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.
How does color affect light waves?
Answer:
Visible light waves consist of different wavelengths. The colour of visible light depends on its wavelength. These wavelengths range from 700 nm at the red end of the spectrum to 400 nm at the violet end. ... Each colour has a different wavelength.
Explanation:
Describe how new hair fibers are formed
Answer:
Taking nutrients from the dermal papilla, the hair bulb generates new hair cells. As these cells move up through the hair root, they mature through a process called keratinization, fill with fibrous protein and lose their nucleus.
Explanation:
I found this on the internet and don't know if it is correct but if it is can I get a brainliest please?
Which layer of Earth's atmosphere is most strongly affected by conditions on the sun's surface?(1 point)
mesosphere
troposphere
stratosphere
thermosphere
Answer: thermosphere
Explanation:
The layer of Earth's atmosphere most strongly affected by conditions on the sun's surface is the thermosphere.
What is thermosphere?The thermosphere is the highest layer of the Earth's atmosphere, extending from about 90 km to 600 km above the Earth's surface. It is the layer where the majority of ultraviolet and x-ray radiation from the sun is absorbed and where auroras occur. The ionosphere, a part of the thermosphere, is where the sun's solar wind and magnetic fields have the strongest impact on the Earth's atmosphere, creating the Northern and Southern Lights.
In comparison, the mesosphere, stratosphere, and troposphere are lower layers of the Earth's atmosphere that are not as directly affected by conditions on the sun's surface.
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Of the three states of matter -- solid, liquid, and gas -- which one exerts the highest pressure on its container, and why?
Answer:
gas because its going super fast and free
Explanation:
hope someone can help me
i think it's the independent variable
Answer:
I think it would be A or E? possibly, im not so sure ;v;
what information is copied from DNA to mRNA
Answer: transaction
Explanation:
Answer:
Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template.
Explanation:
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Madeleine and jared have a child together. Madeleine has type A blood, Jared has type B blood and their child has type O blood. Jared is questioning the paternity of the child. Determine if Jared could be the father of the child. Can he be the father, Why or why not.
Jared could be the father. Types A and B blood types in parents (in this specific way, that being type A maternally and type B paternally) will result in children with either A, B, AB, or O blood types. The blood types are compatible thus, Jared could absolutely be the father.
The Sun appears to move across the sky each day. What causes this?
Answer:
The earth is turning.
Explanation:
when the earth turns it causes the sun to move from one part of the sky to the other. The earth revolves around the sun. So when it become night time for example, the sun is just on the other side of the earth.
pls help and only answer if you can please
Answer:
A
Explanation:
I got this by process of elimination because I know all those other answers are wrong
1. Shivering when you are cold is an example of your body trying to maintain
homeostasis.
a. True
b. False
Answer:
true
Explanation:
When the core body temperature drops, the shivering reflex is triggered to maintain homeostasis. Skeletal muscles begin to shake in small movements, creating warmth by expending energy. Shivering can also be a response to a fever, as a person may feel cold.
The childhood viral disease associated with skin blisters and mild fever is _____.
polio
rubella
mumps
chicken pox
1. Submit your observations of the chicken leg dissection.
2. Were you able to determine how the chicken moves?
3. What characteristics of muscles help you determine the direction of the movement?
Answer:
1. Submit your observations of the chicken leg dissection.
The first thing that I saw was the skin. This one has bumps on it. Underneath, when I carefully cut it, I could see a yellow layer which is fat. Under the fat, there is a thick pink tissue, the muscles. The muscle is in contact with the bones and attached to them by the tendons. They look thin and white and are at the muscles' ends since they attach them to the bones.
2. Were you able to determine how the chicken moves?
Yes, muscles work in pairs, so when I pull from a specific tendon, the leg bends since the muscle contracts to do this movement. Then this muscle will relax, another muscle will contract itself, and a tendon will pull the bone to return the leg to a straight position.
When one of these muscles contracts, the other relaxes to allow the bone's movement in a specific direction. Then this muscle relaxes and allows the leg's movement in the opposite direction since the muscle that was lax before now is contracting itself to extend the leg. There are a flexor and an extensor muscle.
3. What characteristics of muscles help you determine the direction of the movement?
The characteristics that help me determine the movement's direction were:
The position that the muscles have concerning the joints and the bones. The tendons at the end of the muscles and bones.By following the muscle, the tendon, and where it is in the joint, I could determine the movement's direction.
Explanation:
When we observe a chicken leg dissection, we can determine the components that it has and how all the elements work together to move the leg. Even though the mechanism and structure are not the same as in a human body, we can see how muscles, bones, tendons, and joints work not only in animals but also in humans to allow movement.
What does the brain stem do?
Answer:
It connects the rest of the brain to the spinal cord, which runs down your neck and back. The brain stem is in charge of all the functions your body needs to stay alive, like breathing air, digesting food, and circulating blood.
Explanation:
10. Why are algae NOT considered plants?
A. They are not green.
B. They cannot make their own energy.
C. They live in water.
D. They do not have stems, roots, and leaves.
Answer:
D. they do not have stems, roots and leaves
Algae are not considered as plants as they do not have roots, stems, and leaves.
What are algae?They are a group of predominantly photosynthetic, aquatic, and nucleus containing organisms, which are devoid of the following things:
stemstrue rootsleaves andother unique multicellular reproductive compositions of plantsAlgae comprises chloroplasts and generate food by the process of photosynthesis. However, they are not considered as plants, as they are devoid of several other compositions of true plants like roots, leaves, or stems.
Thus, the correct answer is option D.
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Does dna determine your traits
Answer:
yes
Explanation:
because i'm smart
35 POINTS !!!! Part A
An organism’s adaptations are specific to its native environment. An organism that lives in a coniferous forest will have different adaptations compared to an animal that lives in a tropical rain forest. The following graphs show the temperature and precipitation throughout the year for two different forests: a coniferous forest in Canada, and a tropical rain forest in Belize.
Evaluate the graphs, and then explain why plants from these two ecosystems will have different adaptations. In your answer, explain the survival challenges that plants face in these two environments.
Coniferous Forest
graphical representations of the temperature and precipitation in a coniferous forest from January to December
Tropical Rain Forest
a graphical representation of the temperature (top image) and precipitation (bottom image) in a tropical rain forest from January to December
Answer:
Ok so one graph shows the temperature it’s in the negative so the plant can’t survive all you have to say is the plant is struggling in the coniferous forest because of the climate there is not enough sun and not enough water the graph next to it shows the amount of water it’s getting and horizontally it’s showing the months and the plants progress the plant is barley surviving and will most likely die vs in the tropical rainforest as you can see the temperature is sunny all throughout the year it’s getting the warmth it needs and the graph next to it is again showing the amount of water it is receiving at first there’s not a lot but pushing more into spring and summer time going farther into colder whether there a lot more rain and because it’s a tropical forest the rain doesn’t turn into snow due with the warm climate it’s the perfect weather for the plant and it easily adapts to this weather because that is the natural environment plants need to grow no matter the plant they all need sun and water I hope that helped this is supposed to be a written out answer you can put it in your own words if you like or use it that way but I just did it and I got a 90% on the grade
What epigenetic marker changes cause chromatin to open up?
Answer Several lifestyle factors have been identified that might modify epigenetic patterns, such as diet, obesity, physical activity, tobacco smoking, alcohol consumption, environmental pollutants, psychological stress, and working on night shifts.:changes to the histone tails act indirectly on the DNA. For example, lysine acetylation may create a binding site for chromatin-modifying enzymes (or transcription machinery as well). This chromatin remodeler can then cause changes to the state of the chromatin. hope this helps ❤️❤️❤️
Explanation:
The changes with respect to the epigenetic marker should result to the chromatin at the time of opening up because When transcription factors could access the DNA binding sites.
Reasons of chromatin:It is the material that comprises of the chromosome that involved the DNA and protein. The major protein is called as the histones. It should be acted as the packaging elements with respect to the DNA.
Therefore, The changes with respect to the epigenetic marker should result to the chromatin at the time of opening up because When transcription factors could access the DNA binding sites and the gene expression is not be blocked.
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Use your Punnett Square: Child 1 and Child 2 inherited the genotype predicted to be present in 50% of the offspring, which means they will have freckles. What is their genotype?
Note about the question:
I failed to find the complete question, but I am going to give two possible options about the Punnett square that might be useful. In any of the cases, the answer is the same.
Answer:
The children´s genotype is heterozygous for the freckles trait, Ff.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files.
which ecosystem has the greatest biological diversity and therefore the highest sustainability
Answer:
Tropical rain forests on land and coral reefs in marine systems are among the most biologically diverse ecosystems on Earth and have become the focus of popular attention.
Explanation:
definitely D because a rainforest is extremely vast when it comes to different species
Answer:
Species richness is greatest in tropical ecosystems. Tropical rain forests on land and coral reefs in marine systems are among the most biologically diverse ecosystems on Earth and have become the focus of popular attention.
At the zoo, Anya observes that individuals of a certain kangaroo species have slightly different sizes and colors. What characteristic of populations is Anya observing?
O adaptation
O evolution
O selection
O variation
Which statement describes the formation of stars?
I'm pretty sure its heat and gasses
Answer:
c
Explanation:
Stars start out as gas dust and other particles hope this helped and hope its correct have a great day!!
Answer:
The correct answer is 'Dust and Gases Contract'
Explanation:
When Dust and Gases shrink, or become smaller, a star is formed.