1) Why is embryonic stem cell research controversial?
2) What is a potential source of stem cells that is not controversial?
Answer:
1.) It is controversial because in order to take embryonic stem cells, the embryo must die. This is killing a baby.
2.) Stem cells can be taken from your own body from your blood stem cells. This kind of transplant would be considered an autologous stem cell transplant and could help heal diseased or damaged bone tissue.
Hope this helps!
Crossing over occurs when (4 points)
Answer:
Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes during meiosis, which results in new allelic combinations in the daughter cells.
When chromosomal homologs communicate with one another during Meiosis I's metaphase, crossing over takes place.
What is Crossing over?When chromosomes of the same type are paired together during meiosis, a biological event called crossing over takes place.
Parts of the chromosome can be exchanged when two chromosomes, one from the mother and one from the father, line up. The same genes may be present on the two chromosomes in different versions.
The exchange of genetic material between non-sister chromatids of homologous chromosomes occurs during crossing over, an enzyme-mediated process. It happens during meiotic prophase I's pachytene stage.
Crossing over occurs during Meiosis I's metaphase when chromosomal homologs interact with one another.
Thus, this way, crossing over takes place during meiosis.
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HELPPPP PLEASEE
Most S-waves from an earthquake disappear at a distance of about 11,500 kilometers from the epicenter of the earthquake. Explain why this occurs in terms of structure of Earth's interion.
Answer:
When an earthquake occurs the seismic waves (P and S waves) spread out in all directions through the Earth's interior. Seismic stations located at increasing distances from the earthquake epicenter will record seismic waves that have traveled through increasing depths in the Earth.
Seismic velocities depend on the material properties such as composition, mineral phase and packing structure, temperature, and pressure of the media through which seismic waves pass. Seismic waves travel more quickly through denser materials and therefore generally travel more quickly with depth. Anomalously hot areas slow down seismic waves. Seismic waves move more slowly through a liquid than a solid. Molten areas within the Earth slow down P waves and stop S waves because their shearing motion cannot be transmitted through a liquid. Partially molten areas may slow down the P waves and attenuate or weaken S waves.
When seismic waves pass between geologic layers with contrasting seismic velocities (when any wave passes through media with distinctly differing velocities) reflections, refraction (bending), and the production of new wave phases (e.g., an S wave produced from a P wave) often result. Sudden jumps in seismic velocities across a boundary are known as seismic discontinuities.
Within the Earth, molten areas slow down P-waves and stop S-waves because shearing motion of the waves cannot be transmitted through a liquid.
Earthquake cause the seismic waves (P and S waves) that spread out in all directions even in the Earth's interior. Seismic waves move more slowly through a liquid than a solid.
Within the Earth, molten areas slow down P-waves and stop S-waves because shearing motion of the waves cannot be transmitted through a liquid.
Therefore, most of the S-waves of an earthquake disappear about a distance of 11,500 km from the epicenter.
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HELP!!
Which factor is a density-independent limiting factor?
Question 4 options:
availability of food
temperature
availability of water
disease
Answer:
The correct answer is temperature.
Explanation:
I took the test.
The density-independent limiting factor is any force that affects the size and population, temperature, hence option b is correct.
What is the density-independent limiting factor?In ecology, a density-independent factor is any force that has an impact on the size of a population of living creatures regardless of the population's density.
This term is also known as a limiting factor (the number of individuals per unit area). These density-independent causes include nutritional or food scarcity, environmental contaminants, and harsh weather.
Natural catastrophes, seasonal patterns, odd weather, and human activities are density-independent influences.
Therefore, in addition, catastrophes like fires, temperatures, and storms can have an effect on population increase, hence option b is correct.
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15. How many carbons are in citric acid?
carbons
16. Where do those carbons come from?
What happen if lynxes go extinct
Answer:
shown below
Explanation:
If they go extinct there would be a change in the food chain.
Just like the dinosaurs
Answer:
Then I will probably cry. No I'm kidding, well, not kidding. Whatever. If lynxes went extinct there would probably be a large gap in the food chain, resulting in several other extinction events, and possibly overpopulation. Rabbits would likely thrive, seeing as they are the lynxes main food source, and the rabbits would eat too many plants, causing there to be no plants for the other animals in that environment. Many issues would be caused, and I will probably have a mental episode, because lynxes are my FAVORITE animal. Beautiful, cunning, and an apex predator. By far the most amazing animal on earth.
A theory is very different from a law. Which of the following best describes a theory and NOT a law?
True or False: Metals have a higher melting point than water.
The process in which organisms maintain a stable internal environment while living in a changing
environment is called
A osmosis
B. equilibrium
c. transport
D. homeostasis
Answer:
homeostasis is the answer
Answer this will mark brainliest
Answer:
D. 0 K (kelvin)
This is absolute zero, and nothing can go below this.
0 K is equal to -523 degrees Fahrenheit
how do changes in a species population affect other organisms living in the same ecosystem?
Answer:
Explanation:
There are four main types of species interactions that occur between organisms in an ecosystem: Predation, parasitism and herbivory - In these interactions, one organism benefits while the other is negatively affected. * Competition - Both organisms are negatively affected in some way due to their interactions.
A major reason that humans have negatively affected the environment in the past is that humans have
Answer:
Explanation:
attempted to control their population growth
The fact that people have historically prioritized short-term benefits above long-term sustainability is a significant factor in how severely humans have impacted the ecosystem.
Thus, human actions like deforestation, pollution, overfishing, and the burning of fossil fuels have historically been motivated by short-term economic or resource requirements without taking the long-term effects on the environment into account.
The stress on ecosystems and natural resources has grown due to population expansion and rising demand. Unsustainable practises, insufficient regulation, and a lack of awareness have all contributed. To solve these problems, we need to adopt more environmentally conscious behaviors by raising public knowledge of environmental issues.
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Tay Sachs is a disease caused by a mutation in a gene that codes for an enzyme used to break down complex molecules. Patients that have Tay Sachs accumulate excessive fat in brain cells and nerve cells. Normal functioning of this cell structure results in the digestion and removal of harmful fat accumulations, old cell parts, and invaders. Due to a mutation, the enzyme needed to remove fat accumulations does not function. Based on this information, what cellular structure is not functioning properly?
Answer:
Based on the given information , the cellular structure , which don not function properly in Tay Sachs disease is Lysosomes
Explanation:
LYSOSOMES -: In many animal cells, a lysosome is a membrane-bound organelle. These are spherical vesicles containing hydrolytic enzymes that can break down many types of biomolecules. A lysosome, with both its membrane proteins and its lumenal proteins, has a particular composition. There are a number of enzymes in lysosomes, helping the cell to break down different biomolecules that it swallows, including peptides, nucleic acids, carbohydrates , and lipids (lysosomal lipase). For optimal function, the enzymes responsible for this hydrolysis need an acidic environment.
TAY SACHS DISEASE -: The autosomal recessive disorder Tay-Sachs is caused by mutations in both gene alleles (HEXA) on chromosome 15. HEXA codes for the enzyme β-hexosaminidase A alpha subunit. This enzyme is contained in organelles, lysosomes, which break down large molecules for the cell to recycle.
Normally, β-hexosaminidase A helps to degrade a lipid called ganglioside GM2, but the enzyme is absent or present only in very small amounts in Tay-Sachs individuals, enabling excessive accumulation of ganglioside GM2 in neurons. In the different types of Tay-Sachs, the progressive neurodegeneration seen depends on the speed and degree of accumulation of GM2 ganglioside, which in turn depends on the amount of functional β-hexosaminidase A present in the body.
Hence , the answer is lysosomes .
what is an organism that must eat other organisms to obtain energy called?
Answer:
Heterotrophs
Explanation:
Answer:
consumer because animals and humans eat other animals to survive
I’m confused and I need the answer
Answer:
What is the question? What do you need help with?
Explanation:
How does the property of cohesion make farming possible?
Answer:
cohesion refers to the attraction of molecules for other molecules of the same kind, and water molecules have strong cohesive forces to make the crops grow faster
Explanation:
Answer:
Cohesion is the forces holding water molecules together. This concept was covered when talking about properties of water and capillary action. You may remember capillary action is like when you have a little bit of water in the bottom of your cup but the water in the straw is a little bit higher than the water in the cup. Because water is polar - meaning it has a somewhat negative end and a somewhat positive end - it is attracted to other water molecules and other substances, such as the straw.
Cohesion
Now, you may be asking yourself: what does a straw have to do with xylem? Well, just like the water moving up the straw, water moves up xylem. The movement of water in plants is from the roots up through the shoot and out the leaves. Part of the reason for this movement of water is cohesion. The water molecules within the xylem tend to stick together, which allows them to help pull other water molecules up through the xylem - even against the flow of gravity.
When water is moving through the xylem, it is moving between different vessels or tracheids. It is very important that these elements are tightly held together because if there are air bubbles, the effects of cohesion are diminished. That is, if air bubbles get into the xylem, the water will no longer move up through these tubes. We can relate this idea back to our straw. If you have ever had a straw that has even a tiny hole in it, you know that it is very hard - even with the aid of suction - to get the water through the straw and up to you. This is what happens if air bubbles get into the tubes of the xylem.
So , indirectly cohesion helps in farming through xylem....
4 ways land is used in north carolina
Answer:
1) Farming
2) Space to Build Shelter
3) Soil (farming)
4) Water
Let me know if this helps
:)
Answer:
Cropland, Range, Pasture, and Forestry. ;)
Explanation:
Which cellular structure in an animal cell helps maintain homeostasis by controlling the transportation of substances into and out of the cell?
Answer:
Cell membrane
Explanation:
Cell membrane is the cellular structure in an animal cell helps maintain homeostasis by controlling the transportation of substances into and out of the cell
what is homeostasis ?
Homeostasis is a self regulating process that maintain a stability of internal body with respect to the changing external environment which ultimately maintain a steady state of the living system.
It maintain body homeostasis by regulating body temperature, blood pH, blood glucose level, sodium, potassium and calcium ion concentrations.
Three mechanisms are involved in homeostasis such as Effector, Receptor, Control Center.
The homeostasis can be failed due to two factors such as due to an internal environment or other factors like Genetics, Physical condition, diet, nutrition, toxins, Psychological health etc.
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Please help the picture is above I’ll mark as brainliest.
Answer:bro this is beyond lazy
Explanation:
Answer:fungi is a eukaryotic
Bacteria is a prokaryotes
Protist is a Eukaryotic
Animal is a Eukaryotic
Plant is a Eukaryotic
Explanation:
Could someone help me please
22 Carbohydrates perform many metabolic and structural jobs inside the living organisms. An
example of a carbohydrate that provides structural support to cells is –
F chitin, a carbohydrate that strengthens the exoskeletons of insects and other arthropods
Gstarch, a carbohydrate that is used by some plants as a way to store glucose
H cellulose, a carbohydrate that is used by plants to construct the cell wall
J glucose, a carbohydrate that is utilized by all life forms in the construction of nucleotides
Answer:
The answer is J
Explanation:
what happen to the solar radiation that is absorbed?
Answer:
Explanation:
Once the sun's energy reaches earth, it is intercepted first by the atmosphere. A small part of the sun's energy is directly absorbed, particularly by certain gases such as ozone and water vapor. Some of the sun's energy is reflected back to space by clouds and the earth's surface.
Hey I'm Kailey and i need help plzzz asap Based on your study of viruses which of the following is(are) a reason scientists give for saying that viruses are not living organisms?
Question 2 options:
They cannot reproduce without the aid of a host
They use energy but cannot metabolize food into energy
They do not have organized cells
All of the above WILL MARK BRAINLIEST!!!!
Answer:
The answer is that they cannot reproduce without a host or a living organism because by themselves they are virtually harmless
The first answer
Explanation:
Which of the following is a way ATP is used in cellular processes? Select all that apply.
A) detoxification
B) polyatomic ions
C) muscle contraction
D) biosynthesis
E) oxygen production
Which of the following is NOT a limiting factor for coyotes?
A. The amount of competition for fresh water
B. The biodiversity if the population
C. The population of mice
D. The availability of safe places to rest
Answer:
D. Thr availability of safe places to rest
Explanation:
Thats like saying people could die because they don't have a place to sleep
B. The biodiversity of the population is not a limiting factor for coyotes.
What are coyotes?Coyotes are medium-sized mammals belonging to the Canidae family, which also includes wolves, foxes, and dogs. They are native to North America and can be found in a variety of habitats, including deserts, forests, and grasslands.
Coyotes are highly adaptable and opportunistic, making use of a wide range of food sources, from small mammals such as rabbits and rodents, to fruits, insects, and even carrion. They are known for their distinctive howl, which they use to communicate with each other over long distances. Despite their reputation as pests, coyotes play an important role in maintaining the balance of ecosystems, and they are considered a valuable species in many regions.
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Planets that have not cleared the clutter from their neighborhood.
Class: earth and space science
Answer:
A planet that has not cleared the clutter from its neighborhood but meets all other criteria for a planet is called/classified as a dwarf planet.
Explanation:
Raul wants to study how pot size affects the growth of plants. To do this, he intends to purchase three different pots of varying diameter. Then, he will fill each pot with the same amount of soil and plant different kinds of flowers in each pot. Finally, he will place the pots side by side in a sunny location and water each pot daily with the same amount of water.
Answer:
No
Explanation:
Based on the exact methodology that Raul is using he will never produce valid results. This is mainly due to the fact that there are too many changing variables in his experiment. In order to produce valid results, the experiment can only have one changing variable (independent variable) at a time, while all of the other variables need to be controlled/constant. This would allow Raul to isolate which change is actually causing the desired effect in the plants. The way that Raul has his experiment set-up he will not be able to pinpoint exactly what variable or aspect is actually causing the growth of the plants.
what is the energy that is released from glucose by cellular respiration
Answer:
ATP
Explanation:
glucose splits into two pyruvic acid molecules, which in turn, release ATP (Adenosine triphosphate).
What do each of these organelles do in a cell? (A plant or animal cell.)
Cell membrane:
Cell wall:
Nucleus:
Nuclear membrane:
Ribosome:
Endoplasmic reticulum:
Mitochondria:
Chloroplasts:
Golgi Apparatus:
Vacuole:
Lysosomes:
Cell Membrane: Semi-permeable layer which controls what enters and exits the cell.
Cell Wall: (are not present in animal cells) Is for structural support for the cell
Nucleus: Controls activities and regulates the cell, known as the control center of a cell
Nuclear Membrane/Nuclear Envelope: Double membrane layer that is mainly for separation of the contents present in the nucleus from the outside.
Ribosome: Forms protein from amino acids sent through the cell
ER: Protein synthesis and protein transport
Mitochondria: Powerhouses of cells, responsible for cellular respiration and producing energy in the form of ATP
Chloroplasts (not present in animal cells): Mainly for the process of photosynthesis
Golgi Apparatus: Lysosome support, transports proteins and lipids through vesicles
Vacuole : Balances pH (stores water for structural support as well)
Lysosomes: Breaks down waste, helps the cell's metabolism
This took a while, sorry for the wait, I really hope this helps!
50 PTS!! PLEASE: Characteristics of plant cells include which of the following? Select ALL that apply.
cell plate in cell division
cleavage furrow
large hypertonic vacuole
no chlorophyll or chloroplasts
no cell wall, only plasma membrane
Answer:
large hypertonic vacuole
cell plate in cell division
Explanation: