Answer:
Scientists do not fully understand how stem cells proliferate and differentiate.
There are ethical concerns debated when using embryonic stem cells for research.
Scientists do not know the signals used by stem cells and if they are similar when forming specialized cells; they are unable to grow specialized and unspecialized cells in the lab.
It is a newer technology with many questions left to answer.
Explanation: For Edge 2020
How would you now describe how the Sun provides energy?
Please help me put it in your own words
The sun undergoes nuclear fusion, which generates solar energy. The protons of colliding hydrogen atoms fuse to generate helium atoms during fusion in the sun's core. This technique produces a huge quantity of energy because of a PP (proton-proton) chain reaction.
Solar energy is the general term for all solar energy. The sun undergoes nuclear fusion, which generates solar energy. The protons of colliding hydrogen atoms fuse to generate helium atoms during fusion in the sun's core.
Solar energy may be used to make energy, heat water, and cook meals. Additionally, it is possible to store the electrical energy produced by solar energy. The sole constraint on solar energy as a renewable resource is our capacity to efficiently and economically convert it to electricity.
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The bee's hairy thorax (middle section) is covered in pollen. Pollen is produced by male
reproductive organs in the flower. Each grain of pollen contains a sperm cell.
B. What happens to the flowers?
Answer:
1
Explanation:
What’s this? First answer get brainliest
Answer:
a i think
Explanation:
hope this helps
taphonomy is the study of a. the processes that affect a living organism through life. b. human cultural remains. c. the processes that affect an organism’s remains after death. d. human genetics.
Taphonomy is the study of the processes that affect an organism’s remains after death. Even when an organism dies, its affecting activities continue.
The study of taphonomy examines the mechanisms by which organic remnants go from the ecosystem to the lithosphere. Taphonomy includes events that take place after an organism dies (or sheds its components), including decay, burying, and retention as mineralization of fossils or other stable biomaterials.
Necrolysis, biostratinomy, and diagensis are examples of taphonomic processes. Necrolysis is the breakdown of living things after death (the post-burial transformation of the organic material).
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One Fitness magazine suggested that the food that you eat is like a battery because it has energy. Do you think that the banana that mila ate had energy?
how many atoms are in a grapefruit
Answer:
Im pretty sure its: 6,200,000,000 atoms
which bases are found in a strand of DNA
Answer:
Nitrogen Bases: Adenine, Thymine, Cytosine, Guanine
Explanation:
Adenine and Thymine pair together (Apples on the Trees)
Cytosine and Guanine pair together (Cars in the Garage)
all you need is in the photo
Answer:
primary
Explanation:
Primary succession occurs when new land is formed or bare rock is exposed, providing a habitat that can be colonized for the first time. For example, primary succession may take place following the eruption of volcanoes, such as those on the Big Island of Hawaii. As lava flows into the ocean, new rock is formed.
what must be added to water in order to change state from liquid to a gas?
A) energy or heat is correct
163lin jl, br coolman: atlantoaxial subluxation in two dogs with cervical block vertebrae. j am anim hosp assoc. 45:305 2009 19887390
Dogs who suffer from atlantoaxial (AA) subluxation may experience varying degrees of neurological impairments. A block vertebra is a congenital deformity in which two or more vertebrae fuse together.
Two canines with cervical block vertebrae from C(2) to C(5) and C(2) to C(4), respectively, are described. Our theory is that these canines were more susceptible to traumatic AA subluxation because the fused cervical vertebrae caused a "fulcrum effect" at the AA joint.
What signs would point to atlantoaxial subluxation?Although atlantoaxial subluxation is typically asymptomatic, it can occasionally result in intermittent cervical spinal cord compression, occipital headaches, and vague neck pain.
How is atlantoaxial subluxation corrected?In addition to symptomatic relief, cervical immobilization is used in treatment, typically starting with a hard cervical collar. Treatment urgency is typically determined by symptoms or the appearance of aberrant cord tissue on an MRI in susceptible people.Atlantoaxial subluxation is how frequent?They discovered that 2% of patients additionally exhibited vertical atlantoaxial subluxation in addition to the 21% of patients who had anterior displacement of the atlas on the axis (atlantoaxial subluxation).
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what is the cell type of a Blue-breasted bee-eater
Answer:
cells
Explanation:
blue brasted 55 his car was od
Describe animal interactions that affect populations in the tundra ecosystem. (Please help please... I have already had a mental breakdown over school today because its getting harder and harder so please help!)
Answer:
Herbivorous animals are unable to feed and end up migrating to other regions in search of food.
Explanation:
The tundra is a type of vegetation composed almost exclusively of mosses and lichens. This type of vegetation is found in regions with a polar climate. It is important to note that the tundra has a very fast vegetative cycle. That's because it freezes quickly and can be covered with ice all winter. This ends up modifying the lives of some animals that feed on this vegetation. These animals end up with unavailability of food and need to migrate to others in search of food.
Kara thinks that she and the gorilla are going to be friends. Why might she think this? Support your answer with evidence from the text.
Answer:
Well since we dont have the text ill just try and do this the best as possible
Explanation:
Gorillas and humans are extremely similar. We are both primates and we have similar features. However, we evolved from a different kind of primate than gorillas.
I hoped this helped a little bit
Susan lives in a city where the days are usually very warm. However, yesterday was very cold. Which statement is true about the city yesterday?
a. The city had cold weather and climate
b. The city had warm weather and climate
c. The city had warm weather but cold climate
Answer:
c makes the most sense I believe
plz help asap i’ll give brainlest
(only one answer)
Answer:
Nucleic Acids.
Explanation:
quorum sensing in bacteria: the luxr-luxi family of cell density-responsive transcriptional regulators
Bacterial quorum sensing, a technique that controls bacterial gene expression, is dependent on the adaptable chemical signaling molecules known as autoinducers.
How quorum sensing works?Individual bacteria produce autoinducers as part of their reproduction process. Acyl-homoserine lactone autoinducers are made by gram-negative bacteria, and they can passively diffuse through their fragile cell walls. In contrast, the ATP-binding cassette (ABC) transporter system is required for the active transport of gram-positive bacterial autoinducers through their peptidoglycan cell wall. In both situations, autoinducers leave individual cells as they develop. Since the bacteria continue multiplying, a "critical mass" of autoinducers eventually reaches an extracellular concentration due to an increase in the number of individual cells producing them.Learn more about the Quorum sensing with the help of the given link:
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write down the sources and deficiency symptom of calcium
Answer:
Explanation:
Causes of hypocalcemia (calcium deficiency):
- Menopause
- Low levels of vitamin D
- hormonal imbalances (removal/overactivation of parathyroid)
- renal failures
Symptoms of hypocalcemia:
- Memory loss or confusion
- muscle spasms
- numbness/tingling in the extremities (hands, feet, face)
- brittle nails
- more prone to fractures
In the picture below ions, or charged particles, are being pumped through the cell membrane.
Why do they require energy to transport across the membrane?
Answer: well if i had a picture it wouldve helped more but typically if a particle is moving into the cell, it doesnt require any energy, however moving particles outside of a cell requires a large amount of atp.
Explanation:
Rephrase the process of diffusion in your own words, and give an
example.
Answer:
Diffusion is defined as a spontaneous net movement of particles down their concentration gradient or in other words from an area with greater concentration to the area with lower concentration without using any energy (e.g. diffusion of oxygen and carbon dioxide across the alveolar-capillary membrane of the human lungs ...
Spanish moss hangs on the branch of a live oak tree where it receives greater access to sunlight and distance from herbivores on the ground; the live oak tree is unaffected by the Spanish moss. What kind of symbiosis is this?
Commensalism, as only one side benefits
The relationship between the Spanish moss and the live oak tree is an example of commensalism.
What is commensalism?Commensalism is a sort of symbiotic interaction in which one organism gains advantages from the association while the other organism experiences neither negative effects nor positive effects. In this instance, the Spanish moss benefits from its elevated location on the live oak tree, which gives it better access to sunshine and puts it further away from ground-dwelling animals.
The living oak tree, meanwhile, is unaffected by the Spanish moss' existence and neither gains nor loses from the connection. As a result, the relationship is advantageous to the Spanish moss while having no effect on the live oak tree. This kind of connection is a prime illustration of commensalism.
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Please help me!!!!!!!!!!!!!!!!!!!!!!
Answer:
The Calvin cycle has four main steps: carbon fixation, reduction phase, carbohydrate formation, and regeneration phase. Energy to fuel chemical reactions in this sugar-generating process is provided by ATP and NADPH, chemical compounds which contain the energy plants have captured from sunlight.
Explanation:
Define specialization as it relates to four-year college majors.
Explanation:
A specialization is a focused area of study of attached to a specific major, with specific coursework beyond major requirements. A specialization is a focused area of study attached to a specific major, and is in addition to course requirements for the major.
What does mRNA do in protein synthesis?
Answer:
It carries the message on DNA.
Explanation:
Which of the following do you see at a divergent plate boundary?
Answer:
Effects that are found at a divergent boundary between oceanic plates include: a submarine mountain range such as the Mid-Atlantic Ridge; volcanic activity in the form of fissure eruptions; shallow earthquake activity; creation of new seafloor and a widening ocean basin.
13. TEKS: Bio.5(A) The model below represents the change in the amount of DNA in a cell during the cell cycle. DNA Content During the Cell Cycle Complete Sets of DNA in Nucleus I III IV Cell Cycle Phase
Answer:
please post the model i cant see it
I will mark brainest if you get it right.
What is the best "pro" about renewable resources?
A. They are very expensive
B. They are very inexpensive
C. They create pollution
D. They are always available
In otters, the allele for brown fur (B) is dominant over the allele for silver fur (b). Two brown otters mated and a silver pup (baby otter) was born. What were the genotypes of the parents?
Answer:
Bb, Bb
Explanation:
since silver was recessive, both parents had to carry the gene to affect the nest generation but since they were both brown they also needed to have the brown gene present.
The genotype of the parents who produce a silver pup will be heterozygous dominant i.e., Bb. The ratio of the offspring produced from this cross will be 3:1.
What is Genotype?
The genotype of an organism is the complete set of genetic material which is present in the nucleus of the cell. Genotype can also be used to refer to the alleles an individual carries in a particular gene or genetic location in the genome.
In otters, the allele for brown fur (B) is dominant over the allele for silver fur (b). When the two brown fur otters were mated, a silver pup was born.
In this case, brown fur phenotype can be expressed in two cases, homozygous (BB) and heterozygous (Bb).
When both the parents are heterozygous for the character i.e., Bb. Then, the offspring produced will be in the phenotypic ratio of 3:1 i.e., three offspring will have brown fur and one will have silver fur.
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How does the ocean affect the amount of CO2 in the atmosphere?
The ocean significantly absorbs approximately 30% of the carbon dioxide that is liberated in the atmosphere. The concentration of carbon dioxide in the ocean is directly related to that of the atmosphere.
What is Atmosphere?An Atmosphere may be defined as a type of envelope that remarkably surrounds numerous gases across the earth planet or any other celestial body. The atmosphere of the earth consists of 78% nitrogen, 21% oxygen, and one percent other gases.
If the level of atmospheric carbon dioxide increases due to numerous human activities like the combustion of fossil fuels, deforestation, etc. the level of carbon dioxide in the ocean also increases.
This is how the concentration of carbon dioxide in the ocean is directly related to that of the level of carbon dioxide in the atmosphere. The ocean without any intervention directly absorbs carbon dioxide from the atmosphere.
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Which of the following statements about the structure and function of each cell organelle is correct?
A) The mitochondria directs all cellular activities
B) The nucleus gives the cell structure
C) The cytoplasm helps hold the cell's organelles in place
D) Cell walls are found in the cells of all organisms
help asap:)
Answer:
i think it's d but im not sure. i did this in like grade 8
There are twenty amino acids in living organisms. Ten of these are referred to as essential amino acids.
Why are they called essential amino acids?
These amino acids are the only ones that are important for the body to function properly.
These amino acids cannot be made by the human body and must be consumed in one's diet.
These amino acids are the only ones that are made by the human body.
O
DONEV
Answer:
It is “These amino acids cannot be made by the human body and must be consumed by one’s diet.”
Explanation:
A healthy body can produce non-essential amino acids by itself, while we need to acquire the essential amino acids via our diet to be healthy.