Answer:
a. The maternal copy of UBE3A is expressed and the paternal copy is silenced.
Explanation:
When UBE3A chromosome is in neurons, paternal allele is silent and maternal allele is expressed in process of genomic imprinting. In some cases UBE3A is expressed from both paternal and maternal chromosomes. The paternal chromosome is blue whereas maternal chromosome is magenta.
describe the cell membrane, cell wall, nucleus, and cytoplasm. which of these structures are you likely to find in a prokaryotic cell? eukaryotic cell? plant cell? animal cell?
12 points! please answer asap!
Answer:
you can see below
Explanation:
Basic Definitions:
Cell Membrane = the semi-permeable structure that surrounds the cell and keeps all of the cells organelles from exploding everywhere.
Cell Wall = the rigid 'armor' of the cell that surrounds it after the membrane. Usually made up of cellulose and ONLY found in plant cells.
Nucleus = A really dense organelle of the cell usually surrounded by two membranes. They contain and protect your genetic material. Basically everything that makes you, you.
Cytoplasm = The watery, salty, and protein filled 'soup' that fills the cell. All organelles float happily in this.
Now Specific Locations:
Eukaryotic cells
have plasma membranes
please mark me brainliest or mark me thanks at leat
only have cell walls if the cells are plants.
They do have a nucleus.
They have cytoplasm
Prokaryotic cells
have plasma membranes
cell walls are usually chemically complexed.
don't have a nucleus
have cytoplasm
Animal cells
only have the plasma membranes.
No cell wall
have a nucleus
have cytoplasm
Plant cells
have both the cell wall
and have a plasma membrane
have a nucleus
have cytoplasm
What are three structural differences between animal and plant cells
All living things are made up of cells. Cells are the basic unit of a living organism and where all life processes are carried out.
Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane.
Plant cells have three extra components, a vacuole, chloroplast and a cell wall.
define cell and atom
Answer:
Cell: All living organisms are made up of cells, which are the basic building components. Cells also carry the body's genetic material and have the ability to replicate themselves. Cells are made up of several components, each of which serves a particular purpose. Organelles, for example, are specialized structures that perform specific activities within the cell.
----------------
Atom: Protons, neutrons, and electrons are the three subatomic particles that make up an atom. The nucleus, which is made up of protons and neutrons, is at the core of the atom, while electrons float around in a tiny cloud above it.
-------------------------
hope it helps...
have a great day!!
¿ como se producen los cambios de el siglo? porfa es urgente :(
como, Estes todos .........
Select all the correct answers.
The Alps mountain range lies near the boundary of the Eurasian Plate and the African Plate. These mountains are thought to
be the result of two continental plates colliding. Which of these statements would provide evidence for this theory?
Answer:
it would reason that the first sentence is the most evidentiary, since it is fact based verses the second sentence which is theory.
Answer: The mountains are continuously increasing in size. and Periodic earthquakes occur in the region.
Explanation: i literally got my question wrong because i listened to that other guy and he was completely wrong. dont make my mistake and listen to silly people.
What are the functions of leaves? (Select all that apply.) PLEASE ANSWER ASAP AND GET 25 POINTS
release water vapor
absorb water and nutrients
store water and glucose
perform photosynthesis
The main function of a leaf is to produce food for the plant by photosynthesis. Chlorophyll, the substance that gives plants their characteristic green colour, absorbs light energy. The internal structure of the leaf is protected by the leaf epidermis, which is continuous with the stem epidermis.
Conifer Leaf.
Microphyll Leaf.
Megaphyll Leaf.
A leaf is an above-ground plant organ and it is green. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which open and close.
The two main functions performed by the leaf are photosynthesis and transpiration. Photosynthesis is the process by which green plants make their food from carbon dioxide and water in the presence of sunlight.
~Answer~
~Absorb carbon dioxide~
~Perform Photosynthesis~
~Release oxygen~
~Yw~
~and Brainliest are welcome~
~Emmi~
What is the percent yield of the reaction below if 84.0 grams of Al2O3(s) is recovered from a reaction whose theoretical yield of Al2O3(s) is 104 grams?
4 Al(s) + 3 O2(g) → 2 Al2O3(s)
Answer:
is that 23% ..
.. according to my knowledge
which structures are found in typical prokaryotic cells and also in typical plant cells
a) cell walls
b) histones
c) telomeres
d) tonoplasts
Answer:
a. cell wall
pls Mark brainliest
Read the paragraph below to answer the question.
This event was of great significance to modern Chinese history. The monarchial system was
discarded with the founding of the provincial government of the Republic of China. The
victory was soon compromised by concessions on the part of the Chinese bourgeoisie, and
the country entered a period dominated by the Northern Warlords, headed by Yuan Shikai.
(1 mark)
What event is described above and in which year did it happen?
(2 marks)
Answer: 2
Explanation:
make slogan about showing care of environment and natures
plant trees at least every year and keep atmosphere clear
Please help!! Need the Correct Answer ASAP!!
Which statement is true?
A.Peat is a fossil fuel because rewetting it takes only 3–5 years.
B.Peat is a fossil fuel because the total time for restoration is lengthy.
C.Peat is not a fossil fuel because it has biologic origins, making it a biofuel.
D.Peat is not a fossil fuel because humans can promote the replenishment of peat.
Answer:
c) peat is not a fossil fuel because it has biologic origins, making it biofuel
Explanation:
Peat is soil/ turf
The ABO locus for blood typing consists of three alleles, A, B and i. An analysis the ABO blood types in the population of the Pingelap atoll of Micronesia is being planned. A Chi-Square analysis is being planned as part of the data analysis. How many degrees of freedom are there in the experiment
Answer:
1/8(12.5) if the answer is correct plz mark me as brainliest.
imagine that you are conducting tests shortly after a nuclear accident.Using potted moss plants as you experimental organisms,design a experiment to test the hypothesis that the frequency of mutations decreases with the organisms distance from the source of radiation
Answer:
Take two potted plants and provide equal conditions to both.
Explanation:
Two potted plants i.e. one is placed near the nuclear accident site while on the other hand, the other is placed far away from the nuclear accident. Provide equal conditions to both plants so that we can find out the hypothesis that the frequency of mutations decreases with the organisms distance from the source of radiation. The result shows that the potted plant that is located near to the nuclear accident site having high frequency of mutation as compared to other plant due to the radiation present at that location.
define cell and atom
In the respiratory system certain structures allow air to pass from the trachea to the lungs. They are lined with thin
muscles and coated with epithelial cells.These structures are called
O bronchial tubes.
O alveoli.
O bronchioles.
O lobules.
Answer:
bronchioles are the structure
Individuals with premutation length repeats in FMR1 may have some of the phenotypes of Fragile X but not others, which is _____________; for example, some individuals may have cognitive deficiencies, while others might have late onset ataxia. In addition, some individuals will have no phenotypes of the condition at all, due to ____________.
Answer:
variable expressivity; incomplete penetrance
Explanation:
In genetics, variable expressivity refers to the fact that individuals having the same alleles/genes/genotype associated with a particular genetic condition may exhibit different clinical features of this condition. In general, variable expressivity is due to the combination of both genetic and environmental factors. An example of variable expressivity is the Marfan syndrome, where all individuals with this disorder have a dominant mutation in the FBN1 (fibrillin 1) gene and show different degrees of the same phenotype. Moreover, incomplete penetrance (also known as reduced penetrance) refers to the complete absence of a genetic trait or disease in individuals having alleles/genes/genotype associated with the condition. In consequence, individuals with incomplete penetrance do not develop features of the disease. An example of incomplete penetrance is given by those individuals with mutations in BRCA1/BRCA2 genes (associated with an increased risk of developing breast cancer) that do not develop cancer.
1. A biologist studying interactions between an
animal species and its environment is studying
biology at which level?
b. biosphere
c. organism
d. ecosystem
a. cell
Answer:
ecosystem
Explanation:
That is the definition of ecology.
which molecules in your body do not contain carbon atoms
it is usually measured in m/s
Explanation:
The speed of light in vacuum is 299 792 458 meters per second. unit of acceleration is the meter per second per second (m/s2). unit of area is the square meter (m2).
...
Units of Length
10 millimeters (mm) = 1 centimeter (cm)
10 centimeters = 1 decimeter (dm)
10 centimeters = 100 millimeters
10 decimeters = 1 meter (m)
Antennae development in ants is thought to be a trait controlled by maternal effect. In ants, zig-zag coils are dominant to curly coils. Assume that a female develops zig-zag coils. What can be determined about inheritance of this trait in her family?
a. Her mother has zig-zag antennae.
b. Her brother has zig-zag antennae.
c. This female carries the zig-zag allele
d. This female's offspring will have zig-zag antennae.
Answer:
a. Her mother has zig-zag antennae.
b. Her brother has zig-zag antennae.
Explanation:
Available data:
Antennae development ⇒ controlled by maternal effectZig-zag coils are dominantCurly coils are recessiveA female develops zig-zag coilsMaternal effect: Refers to the influence of the “environment provided by the mother” on the progeny phenotype. The mother´s genotype directly determines the progeny phenotype. Even though the progeny has a different genotype, it is irrelevant, as well as the father´s genotype or phenotype. This means that no matter what is the genotype of the offspring, all of them will express the same phenotype as their mother. The maternal effect is commonly seen in insects and might be seen in some mammals and plants.
So, if a female has zig-zag coils, this means that the mother also has zig-zag antennae and that all the brothers and sisters of this female ant have zig-zag antennae, independently of their genotype.
a. Her mother has zig-zag antennae ⇒ True. The trait is inherited from the mother.
b. Her brother has zig-zag antennae ⇒ True. The whole progeny will express sig-zag antennae.
c. This female carries the zig-zag allele ⇒ Not necessarily.
d. This female's offspring will have zig-zag antennae ⇒ Depends on it´s genotype
How does the burning of fossil fuels contribute to climate change?
When fossil fuels exist burned, they release large quantities of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, pushing global warming.
What is fossil fuels?Fossil fuels exist created from decomposing plants and animals. These fuels exist found in the Earth's crust and include carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas exist examples of fossil fuels.
A fossil fuel exists as a hydrocarbon-containing material constructed naturally in the earth's crust from the remains of dead plants and animals that exist extracted and burned as a fuel. The primary fossil fuels exist as coal, crude oil, and natural gas.
When fossil fuels exist burned, they release large quantities of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, pushing global warming.
Global warming exists usually directed to human-induced warming of the Earth system, whereas climate change can be direct to natural or anthropogenic change. The two phrases are often used interchangeably.
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explain water cycle with the help of diagram
Explanation:
The water cycle is defined as a natural process of constantly recycling the water in the atmosphere. It is also known as the hydrological cycle or the hydrologic cycle. During the process of the water cycle between the earth and the atmosphere, water changes into three states of matter – solid, liquid and gas.hope it helps.stay safe healthy and happy...Complete each sentence.
a. Cross-bridge binding triggers the release of ATP hydrolysis products from _________, and produces the _______ which generates force.
b. Ca2+ binds to _____________ on the thin filaments, causing tropomyosin to move away from its blocking position, thereby uncovering cross-bridge binding sites on ____________
c. Energized portions of myosin molecules called ________________ bind to actin.
d. __________________ binds to myosin, breaking the linkage between actin and myosin and thereby allowing the cross-bridges to ________from actin.
Answer:
Plzz upload a full picture of ur chapter
how is the oxygen cycle disturbed by deforestation
Answer:
If deforestation is disturbed then the photosynthesis cycle is disturbed, which results in the oxygen cycle being affected. With a decrease in trees, a decrease in photosynthesis occurs, which cause a decline in the oxygen cycle. A decline in the oxygen cycle results in more polluted air.
Explanation:
Without trees, humans would not be able survive because the air would be unsuitable for breathing. Due to deforestation, there would be fewer trees to "clean" the air. Deforestation is the action or process of clearing of forests, or the state of having been cleared of forests.
Trees and plants, in general, produce energy for growth using a process known as photosynthesis. Using light, water and carbon dioxide, a plant produces energy in the form of sugar and releases oxygen into the air.
Deforestation, as well as a rise in the emissions and our global temperature, affects the air that we breathe. This is because all trees take in carbon dioxide and other pollutants which are known to cause a lot of problems in the atmosphere and to humans. This inevitably results in people breathing dirtier and more polluted air that normally wouldn't happen.
Long-term exposure to polluted air can have permanent health effects such as: Accelerated aging of the lungs. Loss of lung capacity and decreased lung function. Development of diseases such as asthma, bronchitis, emphysema, and possibly cancer.
Trees are responsible for taking the carbon from the atmosphere through photosynthesis in order to make energy. This carbon is then either transferred into oxygen and released into the air by respiration or is stored inside the trees until they decompose into the soil. Therefore, the absence of trees would result in significantly higher amounts of carbon dioxide in the air and lower amounts of oxygen. This bad quality air would also be full of airborne particles and pollutants like carbon monoxide, sulfur dioxide and nitrogen dioxide.
In addition to the decrease of oxygen in the atmosphere, it would allow excessive amounts of carbon dioxide to remain. In the short term, since CO2 is one of the major greenhouse gases, it will undoubtedly lead to higher global temperatures which, in turn, would quicken the melting of the polar ice caps.
Quick quick !!
Which problem affects the global economy in addition to a local economy?
A. A citywide power outage
B. Drought on an island
C. Water pollution in a lake
D. Pollution of the atmosphere
Answer:
D. Pollution of the atmosphere
Explanation:
All the other answers would seem to only affect the designated local area. However, option D would affect both the local and global economy.
What is the principle of size exclusion chromatography?
Answer:
The underlying principle of SEC is that particles of different sizes elute (filter) through a stationary phase at different rates. This results in the separation of a solution of particles based on size.
hope it helped
Size exclusion chromatography (SEC) separates molecules based on their size by filtration through a gel.
What is size exclusion chromatography?
Size exclusion chromatography (SEC) splits molecules based on their size by filtration via a gel. The gel consists of spherical beads including pores of specific size distribution. Separation happens when molecules of various sizes exist included or excluded from the pores within the matrix.
Size exclusion chromatography exists named gel filtration chromatography because the gel effectively allows for the filtering of molecules from a sample based on molecular size. However, unlike other methods, the larger molecules elute first.
Size-exclusion chromatography (SEC), also understood as molecular sieve chromatography, exists a chromatographic procedure in which molecules in solution exist separated by their size, and in some cases molecular weight. It exists usually applied to large molecules or macro molecular complexes such as proteins and industrial polymers.
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3a) label the structure of bacterium below i-vi
Answer:
I. Cell capsule
II. Cell wall
III. Plasma membrane
IV. Nucleoid
V. Cytoplasm
Explanation:
In the structure of bacterium, I represent Cell capsule which is the outer covering of bacterium cell, II is the Cell wall that is located after the cell capsule. III is the Plasma membrane which is also called cell membrane which is the second boundary of cell. IV represents Nucleoid which like nucleus having genetic material, V is Cytoplasm that is responsible for the transportation medium for various nutrients..
Scientists think that red pandas and raccoons share a more recent common
ancestor than red pandas and giant pandas do. If this is true, what would you
expect to be true about the genetic sequences in these organisms?
O A. Red pandas and raccoons must have identical DNA sequences.
B. The DNA sequences of giant pandas are likely to be more similar
to the sequences of raccoons than of red pandas.
C. Red pandas must have a different genetic code than giant pandas.
O D. The DNA sequences of red pandas are likely to be more similar to
the sequences of raccoons than of giant pandas.
Answer:
D seems to be best answer if that was my test
Explanation:
makes the most sense
Answer:
D
Explanation:
During the process of DNA replication, the whole molecule gets copied in the [A] phase of the cell cycle. The DNA strands are separated by the enzyme [B] while [C] keeps it from overwinding. The 2 strands are copied differently. The [D] strand is made continuously, while the [E] strand is synthesized in small sequences called Okazaki fragments. The main enzyme involved in DNA replication is [F]. This enzyme can only add nucleotides to an existing strand, so short sequences of [G] made by the enzyme [H] are needed for the process of elongation. In the [U] strand, the enzyme DNA polymerase one removes the short tj sequences and fills the gaps, while [K] joins the fragments.
Answer:
Synthesis, DNA helicase, topoisomerase, leading strand, lagging strand, DNA polymerase, nucleotides, primase, lagging strand, nucleotide, DNA ligase
Explanation:
During the process of DNA replication, the whole molecule gets copied in the synthesis or S phase of the cell cycle. The DNA strands are separated by the enzyme helicase while topoisomerase keeps it from overwinding. The 2 strands are copied differently. The leading strand is made continuously, while the lagging strand is synthesized in small sequences called Okazaki fragments. The main enzyme involved in DNA replication is DNA polymerase. This enzyme can only add nucleotides to an existing strand, so short sequences of nucleotides (primer) made by the enzyme primase are needed for the process of elongation. In the lagging strand, the enzyme DNA polymerase one removes the short tj sequences and fills the gaps, while DNA ligase joins the fragments.
A Synthesis,
B DNA helicase,
C topoisomerase,
D leading
E lagging strand
F DNA polymerase
G nucleotides
H primase
I lagging strand
J nucleotide
K DNA ligase
In a certain population, the allele causing sickle cell anemia has a frequency of 0.2. If the population is in genetic equilibrium for this allele, what fraction of the population would be heterozygous for this gene
Answer:
32% population would be heterozygous for this gene.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
