Explanation:
Dorsal is posterior(back). Ventral is anterior(Front)
After an organism dies, it stops taking in radioactive carbon-14 from the environment. If the carbon-14:carbon-12 ratio ( / ) in a piece of petrified wood is one sixteenth of the ratio in living matter, how old is the rock
Answer:
Age of rock= 22920 years
Explanation:
Carbon-12 isotope is a stable isotope whereas carbon-14 isotope undergoes radioactive decay. The half-life of carbon-14 isotope = 5730 years
Since the ratio of carbon-14 to carbon-12 = 1/16 : 1; number of times carbon-14 isotope decayed n
(1/2)ⁿ = 1/16
(1/2)ⁿ = (1/2)⁴
n = 4 times
time(age) for decay = n * half-life
Therefore, age of fossil = 4 * 5730 years
Age of rock = 22920 years
You have been looking at meiosis beginning with a diploid cell that has the genotype AaSs. The alleles in the haploid gametes produced by meiosis are
Answer:
AS, As, aS, as
Explanation:
Meiosis is the cell division that involves the production of daughter cells or gametes with a reduced number of chromosomes. i.e. diploid (2n) - haploid (n).
According to Gregor Mendel in his law of Segregation, the alleles of a gene will separate into gametes in such a way that only one allele will be present in each sex cell. Hence, in this diploid cell with genotype AaSs, the alleles will separate into the haploid cell in the following genotype proportion:
AS, As, aS, and as
difference between a molecule and a cell.
Answer:A cell is made of molecules and a molecule is made of atoms. That's the simplest way of putting it. More complicated is that a cell is made up of macromolecules, such as proteins, lipids , etc. A molecule is a particular configuration of atoms.
Explanation:
it called google
5.
What can scientists measure to provide evidence that electrons can move from one energy level to another?
1.the angle of deflection of alpha particles
2.the number of electrons deflected by a thin sheet of gold foil
3.the energy absorbed or released by atoms
Answer:
2.the number of electrons deflected by a thin sheet of gold foil
Explanation:
the three basic skills needed for effective communication are
Answer:
Listening. One of the most important aspects of effective communication is being a good listener. ...
Non-Verbal Communication. ...
Be Clear and Be Concise. ...
Explanation:
Which statement best describes a solid?
D. Its particles are very far apart.
A. Its particles do not move at all.
C. Its particles can flow past each other.
B. Its particles vibrate in place.
Answer:
it's particles vibrate in place
Explanation:
They have a fixed volume and shape
identify the type of cell that does not contain a nucleus
Answer:
A bacteria cell
Explanation:
Define “isotope” using mass number, atomic number, number of protons, neutrons and electrons. (PLEASE HURRY!)
Isotopes have different mass numbers due to different number of neutrons but same atomic number due to same number of electrons and protons.
What are isotopes?
Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.
Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.
They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable
Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .
Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.
Learn more about isotopes,here:
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Answer:
Length is not a derived quantity as it measures fundamental quantity length.
Explanation:
Derived quantities cannot be measured directly. They can only be computed. Many derived quantities are calculated in physical science. Three examples are area, volume, and density.
When salt is dissolved in water, the water is the
solute
solvent
solution
Answer:
solution
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Mining companies bring workers from different places. This increases business in the town nearest to the mine.
Which type of impact is being described in this scenario?
A)
atmospheric impact
B)
biological impact
C)
ecosystem impact
D)
social impact
E)
topographic impact
Answer:
I believe this is C) ecosystem impact
Explanation:
The interactions between human population dynamics and the environment have often been viewed mechanistically. This review elucidates the complexities and contextual specificities of population-environment relationships in a number of domains. It explores the ways in which demographers and other social scientists have sought to understand the relationships among a full range of population dynamics (e.g., population size, growth, density, age and sex composition, migration, urbanization, vital rates) and environmental changes. The chapter briefly reviews a number of the theories for understanding population and the environment and then proceeds to provide a state-of-the-art review of studies that have examined population dynamics and their relationship to five environmental issue areas. The review concludes by relating population-environment research to emerging work on human-environment systems.
Which stage of the cell cycle results in two identical cells?
mitosis
cytokinesis
interphase
metaphase
Answer:
Cytokinesis
Explanation:
The stage in mitosis in which the cell divides. Took it on E2020
Answer:
B.Cytokinesis
Explanation:
If certain ocean species were to die out from ocean acidification, what would the impact be on the oceanic ecosystem and the remaining species?
Make a claim. Support your claim with relevant data or evidence from the article. Then, justify why the data or evidence supports your claim
Answer:27 negative
Explanation:
One ounce is equivalent to
10 grams
20 grams
30 grams
40 grams
Answer:
30 grams
Explanation:
1 ounce= 28.3495 grams
If you round it, it will be the closest to 30 grams.
Hope this helps!
If the mass of Earth were increased by a factor of 8.00 , by how many times would the force between Earth and the Sun increase?
Answer:They would increased a lot and cause problems.
Explanation:
Which products do not have scientific studies supporting their claims to be beneficial when used?
A. Cofactors and coenzymes to support enzyme function
B. Lactase enzymes used in milk sugar digestion
C. Enzyme that aids in the digestion of oligosaccharides
D. Enzymes to promote immune system function
A diagram of the human digestive system is shown below removing which organ would have the smallest impact on the digestion absorption and elimination
Answer:
Esophagus
Explanation:
esophagus provides a passway between the mouth and stomach otherwise it has no other major function in digestion, absorption and elimination.
What happends if a cell were to have an interphase 1 and 2 when doibg meiosis
Animals store most of their excess energy reserves as ____.
Answer:
Lipids (Fats)
3. What are the different science processes demonstrated in the activities
performed?
Why do thermos bottle keep cold beverages contained inside them from getting warm?
Does this model represent a compound? Explain your answer.
Answer:
uhm i don't want to rush into answers
Explanation:
can you kindly show me the model
Pick one of the body parts shown in Sammi's model. How would a disease or injury to this organ affect the process modeled? How would it affect the body as a whole
Answer:
the heart is what makes every moving part working inside our body even though the brain is the one who tells them or gives them signals to work. the heart is what keeps them alive and if the heart takes any kind of negative damage the would not take care of everything it's supposed to.
Explanation:
Hope this helps
The body part picked is ; The Heart
An injury or disease to the heart will stop the whole body functioning and the process modeled will be distorted
The heart in the body is equivalent to the engine of a car, The heart pumps oxygen carrying blood cells into all the organs and without this oxygen carrying blood cells the whole body will stop functioning ( i.e. The organs will be dead ).
An injury or disease to the Heart will negatively affect the distribution rate of blood to all parts of the body and this will negatively affect the overall wellbeing of the body and this will also negatively affect the process been modeled as well.
Hence we can conclude that The body part picked is ; The Heart , and An injury or disease to the heart will stop the whole body functioning and the process modeled will be distorted
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state at least 3 uses of bacteria
Answer:
eat sleep repeat
Explanation:
Answer:
1- Digestive Bacteria, bacteria is used by the body to digest and break down foods
2-Pest Control, specifically Bacillus thuringiensis is used for pest control
3- Fermentation, fermenting foods like yogurt, beer, and most alcohols use bacteria in the fermenting processes.
:)
You are curious about the effects of different watering schedules on your favorite fruit, strawberries. You set up plants, all the same age and size, and plant them in identical pots with the same potting soil. You water them once a week, every day, or every other day. Every day, you check the plants for strawberries, and record the number and size of the berries produced by each plant.
The complete question is as follows:
What is the independent variable in this strawberry experiment?
O the type of pots
O the number and weight of strawberries produced
the potting soil
O the water schedule
O size and age of plants
Answer:
The correct answer is - the watering schedule.
Explanation:
Independent variable is the variable or the factor which is changed or manipulated during a study or experiment to find the effect on the dependent variable.
The variable that is manipulated in this experiment is the watering schedule and the aim of the experiment is also finding the role of the effect of the watering schedule on fruit production. In this study, the watering schedule is manipulated for different pots of plants to see the effect on the production of fruit.
what happens to the temperature of water as time elapses?
Why subject bio is named as multidimensional subject
Answer:
Explanation:These studies generally explore how insights gained from traditional unidimensional biodiversity research differ from those derived when multidimensional approaches are taken
Explain the contribution of antigenic determinant in false negative and false positive test
Answer:
The contribution of the antigenic determinant is given below:
Explanation:
Antigenic determinant or epitope is the part of the antigen that is recognized by the immune cells or antibodies such as the B- cells by binding to these cells and evokes the response in the host. The antibodies bind to the epitope segments only not to the entire antigen protein.
A false-positive test is a test where the result suggests that an individual has a specific condition but in reality not having such condition. opposite in the false-negative So, the antigenic determinant binds to the specific antibodies and shows wide significance to reduce the false-negative or false-positive.
When ATP is hydrolyzed, are you adding water or removing it? Explain 20 points I’ll do brainlest too
Answer:
Are there answers
Explanation:
Answer:
adding water
Explanation:
hydrolysis means adding water to it
How can two organisms have the same phenotype but different genotype
Answer:
Same phenotype but different genotype is possible due to presence of dominant allele. A person can have a dominant allele on both the homologous chromosomes (i.e. in double dose) while another person may have single dominant allele and a corresponding recessive allele
Explanation:
Answer:
Same phenotype but different genotype is possible due to presence of dominant allele.
Hope this helps!
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