Answer:
Explanation:
well different kinds of drugs can affect neuron activity an example is if you take pain pills it blocks the neurons that sense pain other drugs can give you high levels of dopamine, dopamine is the hormone that makes you feel good. that is why drug addictions are serious, and many cannot stop the addiction because it makes them feel good. and if you take the same dose over time your body gets a tolerance to the drug and you need a higher dose every time to get the same feeling and that can lead to an overdose or even death.
and no this is not copied :)
How do stem cells know what type of cell to differentiate into?
Through gene expression, transcription and translation of this subset of genes determines how a cell looks and acts—its phenotype. ... | Cell fate means that a stem cell “makes a decision” to differentiate into a more mature cell type.
Moving ions against a concentration gradient requires energy and results 2 points
in uneven concentrations of the ions. ATP powers the pump, allowing it to
create and maintain
of these ions. *
concentration gradients
equilibrium
diffusion
osmosis
Answer:I think osmsis
Explanation:
What is the main function of the smooth and rough Endoplasmic Reticulum in a cell?
Answer:
Smooth endoplasmic reticulum provides vesicles for the Golgi apparatus whereas rough endoplasmic reticulum provides biochemical for the Golgi apparatus. Both smooth and rough endoplasmic reticulum helps in the synthesis and storage of proteins.
Hope this helped!
Color blindness is a X-linked recessive trait. A couple want to predict whether it would be possible for their child to be color blind. The female is an unaffected carrier and the male is red/green color blind. What percentage of offspring would be color blind?
Answer: There is a probability (n.b. NOT certainty) that half of all offspring will be colour blind.
Explanation: The female is XX and as an unaffected carrier we can assign genotype Cc where c is the recessive allele.
The male is XY and colour blind, so genotype cY
Male offspring can be cY or CY so p|colourblind = 50%
Female offspring can be Cc or cc so, again p= 50%
If there is also equal probability of sex of the offspring, there is an overall probability that half the offspring will be colour blind
What happens at the temperature shown?
Answer:
particles would stop moving
Explanation:
Answer:c
Explanation:
if a sample known to be about 11,460 years old and has 400 carbon 14 Adams how many atoms are in the sample when organisms just died
Answer:
There are 1600 atoms when organism just died.
Explanation:
The statement is incorrect. The correct statement is:
If a sample known to be about 11,460 years old and has 400 carbon 14 atoms. How many atoms are in the sample when organisms just died?
The amount of atoms associated with radioactive isotopes decreases exponentially in time by means of the following formula:
[tex]n(t) = n_{o}\cdot e^{-\frac{t}{\tau} }[/tex] (1)
Where:
[tex]n_{o}[/tex] - Initial amount of atoms.
[tex]n(t)[/tex] - Current amount of atoms.
[tex]t[/tex] - Time, measured in years.
[tex]\tau[/tex] - Time constant, measured in years.
In addition, the time constant can be calculated in terms of the half-life of the radioactive isotope ([tex]t_{1/2}[/tex]), measured in years:
[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (2)
If we know that [tex]t_{1/2} = 5,730\,yr[/tex], [tex]t = 11,460\,yr[/tex] and [tex]n(11,460\,yr) = 400[/tex], then the initial amount of atoms is:
[tex]n_{o} = \frac{n(t)}{e^{-\frac{t}{\tau} }}[/tex]
[tex]\tau = \frac{5,730\,yr}{\ln 2}[/tex]
[tex]\tau \approx 8,266.643\,yr[/tex]
[tex]n_{o} = \frac{400}{e^{-\frac{11,460\,yr}{8,266.643\,yr} }}[/tex]
[tex]n_{o} \approx 1600[/tex]
There are 1600 atoms when organism just died.
Explain how PHOTOSYNTHESIS works in plants
Answer:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. ... This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.
Explanation:
identify and explain three environmental impacts of current agricultural methods
Explanation:
It is profit making practice but it causes increased level of pathogens.
It has increased the level of chemicals in our land and water.
It has increased levels of greenhouse gases in air.
lee and Celia are lab partners. While Celia pours a chemical into a graduated cylinder, some of the chemical splashed onto her arm . What should happen next?
Answer:
Celia should tell the teacher and wash her hands and arms twice.
Explanation:
She should tell the teacher because if she is unsure of what to do, the teacher can help her. If there is no teacher present, she should wash her hands and arms twice to remove as much of the chemical as possible. Then she should call a poison help or chemical help center if she is unsure of what to do next.
When humans breed organisms, they are selecting variations that occur naturally in populations.
True or false ?
Answer:
TRUE!!!
Explanation:
Artificial selection, often known as "selective breeding," is when people choose animals or agricultural products based on desirable features, hence it is a true statement.
What is Artificial selection?Different phenotypes can be introduced into an organism via genetic changes that change gene activity or protein function.
Natural selection is the process of identifying advantageous traits in plants and animals and taking actions to improve and perpetuate those traits in subsequent generations.
If a trait is advantageous and aids an individual in surviving and reproducing, the genetic variation is more likely to be passed to the next generation.
Therefore as opposed to letting the species evolve naturally without human intervention, as in the natural selection, hence it is a true statement.
Learn more about selection, here:
https://brainly.com/question/1306974
#SPJ2
Humans and dogs evolved from a common ancestor. Which pieces of evidence would support this? Check all that apply. Both of their adult forms look very similar. They both had a tail as an embryo. Their arm and leg structure is similar, but may have a different function. There are fossils of an organism that is half man, half dog in the fossil record. Both had gill slits when they were born.
Answer:
They both had a tail as an embryo.
Explanation:
Both human and dogs have tail as an embryo. Temporary tail-like structures are present in the human embryo. These tail like structure develop around the fifth or sixth week of gestation, having about 10 to 12 vertebrae and removed when it reached to its full development stage while on the other hand, tail present in dog's embryo also developed with time and we can see when the dog baby is fully formed.
Answer:
They both had a tail as an embryo.
Their arm and leg structure is similar but may have a different function.
Explanation:
They both had a tail as an embryo.Vestigial structures are those body parts that have lost or reduced their original function during the evolution of a species. These vestigial structures might be found in many animals, including human beings. Vestigial structures were plenty functional for common ancestors. But with evolution, they degenerated, stunted, and became rudimentary for some of the new species.
During the first 4 months of embryogenesis, all mammals have a tail at some point in their development. Dogs develop this structure and keep it during their whole lives, but humans lose it with time during embryogenesis. The tail disappears, and its forming vertebras get fussed with each other composing the coccyx, which represents a vestigial structure. This tailbone is the remnant of a missing tail.
In many animals, the function of the tail is to stabilize, equilibrate and mobilize. But in humans, the coccyx, located at the end of the vertebral column, has lost this original function.
Their arm and leg structure is similar but may have a different function.The fact that whales, humans, and dogs all have the same bones in the same order, but they matured differently in later embryological development, is an example of homologous characters.
Homologous characters have the same fundamental structures. They also share the same relations with adjacent structures, and they have the same embryological development.
These structures might show variations between organisms exhibiting them, according to their function and to the environment in which the organism lives.
These homologous characters are common in organisms related and that share a common ancestor.
Sodium chloride can most likely be used successfully to melt ice in which
Canadian city?
A. Regina
B. Winnipeg
C. Toronto
D. Fort McMurray
The curving of Earth's planetary winds is due to:
A)the Coriolis Effect.
B)Earth's tilt on its axis.
C)density differences.
D)gravity.
Answer:
It is due to the coriolis effect
Explanation:
2x+3y=12
x-5y=-7
solve simultaneously
PLEASE HELP ME!
Polar climates normally get ____________ amounts of precipitation.
a.
high
c.
medium to high
b.
little
d.
little to medium
Please select the best answer from the choices provided
Answer:
little
Explanation:
because it is so cold there
3. Gregor Mendel cross-pollinated red and white snapdragon flowers,
What information indicates that incomplete dominance was achieved?"
O the offspring had heterozygous allels
O the offspring had recessive alleles
O the offspring were pink
O the offspring were red
Which two factors are most likely to cause a plant's guard cells to open its stomata?
A. Increased gravitational pull I
B. Increased sunlight
C. Increased rainfall
D. Increased turgor pressure
the correct answers are B and D
the increased sunlight will determine the guard cells to start photosynthesis, this will result in an incresed glucose concentration inside the guard cells .The increased glucose concentration will cause osmotic pressure to build up, so the guard cell will absorb water from neighbouring cells, this will cause increased turgor pressure that will deform the cells in order for the stomata to open
Answer:
D. Increased turgor pressure
B. Increased sunlight
Explanation:
3. What is it called when water vapor is evaporated from plant surfaces? *
Transpiration
Respiration
Photosynthesis
All of the above
A chemical reaction that has the general formula of nA → (A)n is best classified as a
reaction.
Answer:
true
Explanation:
Answer:
Polymerization
Explanation:
What do you call protozoa that you can see with the naked eye?
Answer:
Paramecium protozoa
Explanation:
because of their size (50-300 μ long) and the human eye can see things as small as about 100 µm and P.
I WILL GIVE BRAINLIEST
Use the image to answer the question.
The image shows a food chain. An arrow points from grass to a grasshopper. An arrow points from the grasshopper to a lizard. An arrow points from the lizard to a hawk. An arrow points from the hawk to a fox.
What would happen if the number of grasshoppers in this food chain decreased?
A.
The amount of grass would increase.
B.
The number of lizards would increase.
C.
The amount of grass would decrease.
D.
The number of hawks would increase.
Answer:
a, the amount of grass would increase
Explanation:
if the grasshopper is the one in this diagram eating the grass, and suddenly there were fewer grasshoppers to do that, the grass would increase because more of it can grow without being eaten
BIOLOGY QUESTION NOT THAT HARD
NEED THIS ANSWER IN 20 MINS OR LESS PLEASE
Two questions:
1. What are the 2 major functions of proteins?
2. Describe the structure of proteins.
Answer:
1. It helps repair and build your body's tissues and it also provides your body with a structural framework.
2. Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule.
Explanation:
Answer:
1-Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs.
2-The overall structure of the protein includes both alpha helices (green) and beta sheets (red). The primary structure of a protein — its amino acid sequence — drives the folding and intramolecular bonding of the linear amino acid chain, which ultimately determines the protein's unique three-dimensional shape.
What is a claim? (what does it answer?)
Answer:
A claim is mostly used in an Argumentative essay and it answers the topic or the prompt of an essay. For example,you can choose a side if you agree or don't agree.
Hope this helps.
Explanation:
Are axolotl prokaryotic
Answer:
The axolotl, Ambystoma mexicanum, also known as the Mexican walking fish, is a neotenic salamander related to the tiger salamander. Although colloquially known as a "walking fish", the axolotl is not a fish but an amphibian. The species was originally found in several lakes, such as Lake Xochimilco underlying Mexico City. Axolotls are unusual among amphibians in that they reach adulthood without undergoing metamorphosis. Instead of developing lungs and taking to the land, adults remain aquatic and gilled.
Explanation:
Answer:
prokaryotic
Explanation:
I just took the test!
2) A person with hardened arteries will
a) have great blood flow
c)have low elasticity in their blood vessels
b) have a normal blood pressure
d) be a low risk for a heart attack since their blood vessels are strong
Answer:
B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Explanation:
Which of the following areas of science would
allow someone to obtain a job for NASA?
A. Physical Science
B. Life Science
C. Social Science
D. Medical Science
Which accurately describes reproduction in gymnosperms? Select four options. Some require heat for seed dispersal. Female cones produce pollen. Most gymnosperms produce male and female cones. Fertilized ovules grow into seeds. Male and female cones may grow on the same plant.
Answer:
A, C, D, and E are corecct
Explanation:
Some require heat for seed dispersal.Most gymnosperms produce male and female cones. Fertilized ovules grow into seeds. Male and female cones may grow on the same plant.Answer:
A C D E
Explanation:
I just took the quiz and got the question right
Can enzymes work to catalyze another reaction once one is complete?
What is the main feature of frog?
Answer:
In general, frogs have protruding eyes, no tail, and strong, webbed hind feet that are adapted for leaping and swimming. They also possess smooth, moist skins. Many are predominantly aquatic, but some live on land, in burrows, or in trees. A number depart from the typical form.
HELP ASAP
Which statement is true about scientific theories and laws?
A theory can never become a law
If enough evidence is found for theory, it will become a law
Theories have more proof than laws
Only laws are widely accepted by the scientific community
Answer:
A theory can never become a law
Explanation:
The rest are wrong
Theories can change
Laws cannot
