What part of the scientific method is this: Because human subjects are difficult to study, laboratory rats were used. One group of laboratory rats was given the artificial sweetener, and another group was not. All of the rats were given an identical diet and living conditions.
For a single-gene trait with alleles A and a, a certain mating produces offspring that are 1/4 AA : 1/2 Aa : 1/4 aa. What is the mating?
Answer:
Random mating
Explanation:
Random mating is a type of mating that allows individual to have equal chance of been mated to.
AA genotye is mated with aa from a population and they produce
Four individuals with Aa
AA × aa
!
F1: Aa Aa Aa Aa
This individuals then intermate in the next generation to produce an offspring with three difference genotype AA, Aa, aa in ratio 1:2:1 this is called segregation of genes. This allow to see the variation and hidden features of the individual mated.
Aa × Aa
!
AA Aa Aa aa
F2: 1/4 AA, 1/2 Aa, 1/4 aa
The presence or absence of
a. cells
b. atoms
c. molecules
provide evidence that a specimen is a living thing.
Answer:
I know it
Explanation:
cells because an humane body is made up of cells
compare endocytosis and exocytosis. ( one similarity and one difference)
Answer:
Similarities include: Both are involved in transporting big molecules across the membrane. ... formed from the cell membrane which then gets into the cytoplasm. Exocytosis increases the size of the cell membrane while endo does the opposite.
What were the ancestors of mitochondria according to the endosymbiotic theory?
20 points
A. Aerobic eukaryotes
B. Aerobic bacteria
C. Anaerobic bacteria
D. Chloroplasts
Answer:
d is your answer
Explanation:
Ancestors of Mitochondria were aerobic bacteria, according to endosymbiotic theory.
What is endosymbiotic theory ?According to Lynn Margulis' endosymbiotic theory, mitochondria in eukaryotes are thought to have originated via an endosymbiotic connection with purple photosynthetic bacteria around 1.5 109 years ago. The endosymbiont, which had been captured, was subsequently transformed into a useful organelle bound by two membranes. Supporting data for the endosymbiont theory.
Prokaryotic cells and mitochondria are the same size. The DNA found in mitochondria is structurally identical to bacterial DNA. Similar to bacteria, mitochondria are self-replicating cells divide by binary fission Two membranes enclose mitochondria, and the inner membrane is structurally very similar to that of bacteria.
Therefore, aerobic bacteria are the ancestors of mitochondria.
Learn more about endosymbiotic theory here:
brainly.com/question/20493359
#SPJ6
Describe the resting state of a neuron.
What is directly related to the function of a cell?
Answer:
Cells have many structures inside of them called organelles. These organelles are like the organs in a human and they help the cell stay alive. Each organelle has it's own specific function to help the cell survive. The nucleus of a eukaryotic cell directs the cell's activities and stores DNA.
Explanation:
How are the processes of the water cycle essential to an unpolluted biosphere?
Answer:
Explanation:
if things on earth like dead animals or polluted chemicals in the air can affect the biosphere so keeping the stages of the water cycle safe and clean are essential to keeping the biosphere unpolluted. because Evaporation & transpiration distill water naturally, it filters out minerals and pollutants.
Histones are small proteins with a strong positive charge at physiological pH. They are found in the nuclei of eukaryotic cells and package DNA into nucleosomes, the fundamental structural units of chromatin. Based only on this description, what two forms of chromatography could you use, one after the other, to separate histones from other cellular proteins? Explain your reasoning.
Answer:
Two modes of chromatography that could be used over and over, based on characteristics of histones throughout the issue, are:
Size-exclusion Chromatography Ion exchange chromatographyExplanation:
Using size exclusion chromatography:A stationary step, consisting of such a polymeric material with numerous pores of various sizes. The larger proteins would travel further as the solvent system comprising the analytes flows through the paper chromatography and therefore will be separated first. That was because their greater size does not in itself allow the pores found in the polymer to get trapped. Tiny proteins such as histones, and on the other hand, can pass slowly across the process to have been eluted later.
Using Ion exchange chromatography:As even the histone properties at biological pH are strongly positively charged, through the use of highly reactive particles as when the stationary step will allow histones to connect to themselves and now all the proteins, as well as favorable proteins that are poorly absorbed, would be eluted. Many positively charged molecules, that aren't as highly charged at around the same pH as histones, will stay throughout the stationary step, however, based on whose net charge, should flow independently of histones.
The two classes of chromatography techniques include size-exclusion and ion exchange chromatography.
What are size-exclusion and ion-exchange chromatography?Chromatography is a technique used in molecular biology laboratories to separate biomolecules.
Size exclusion chromatography is a technique capable of separating biomolecules according to size by using filtration in a gel. Size exclusion chromatography is a technique capable of separating biomolecules and ions according to their affinity to a given ion exchanger.In conclusion, the two classes of chromatography techniques include size-exclusion and ion exchange chromatography.
Learn more in:
https://brainly.com/question/26491567
How many times would you expect a restriction enzyme that recognizes a 6 base palindrome to cut a 24000 base piece of DNA?
Answer:
Total number of expected cut = 6 (Approx)
Explanation:
Frequency of 6 base sequence = (1/4)⁶
Frequency of 6 base sequence = 1 / 4,096
Find:
Total number of expected cut
Computation:
Total number of expected cut = 24,000 (1 / 4,096)
Total number of expected cut = 5.8593
Total number of expected cut = 6 (Approx)
In which of the following relationships do both species benefit?
A. Competition
B.Commensalism
C. Parasitism
D. Mutualism
what system gives itself information about itself after change or event this is called
Answer:
The term feedback involves a process wherein the system regulates itself by creating a response or returning an information regarding its productivity.
Explanation:
Hope this was helpful
Answer:
It is feedback
Explanation:
Need help ASAP 48 points
4 questions and map on top ASAP :)
A baseball is tossed into the air, forming an arc. Mark the following points:
1. Kinetic energy is the highest
2. Potential energy is the highest
3. Kinetic energy is converted in potential energy
4. Potential energy is converted into kinetic energy
Answer:
it is number 3 .............
Answer:
Kinetic energy is the highest when the baseball is in the air.Potential energy is the highest when the ball is about to be thrown.Kinetic energy gets converted to potential energy when the ball stops flying in the air and falls on the ground.Potential energy is converted into kinetic energy when the ball is thrown.SOMEONE PLZ HELP!!!!!!!!!
Answer:
the central vacuole.
Explanation:
the vacuole is responsible for discarding waste within the cell.
Answer:
central vacoule because it is just like a vacum :)
Explanation:
An 8 year old girl is brought to your office by her mother, who tells you that the girl has been complaining of a sore throat for 3 days. Thinking that the girl was developing a cold, she kept her daughter home from school with the hope that she would get better. She has become worse in the past day, however, developing a fever of 103 degrees F, a headache, and complaining of abdominal pain. As you examine her throat, you see that in addition to red and enlarged tonsils, that there are white patches on them, and that there are swollen lymph glands on both sides of her neck.
Answer:
she has Strep throat or something like that
Explanation:
the Severity of strep throat can vary from person-to-person. The common symptoms are as follows:
Sudden high fever
Mild soreness in throat
Redness in throat with white patches
Headache
Chills
Loss of appetite
Cervical lymphadenopathy (swollen lymph nodes in the neck)
Swollen tonsils
Difficulty in swallowing food or water
Pain when swallowing
Nausea and vomiting is seen in younger children
Answer: Acute otitis media.
Explanation: This question is based on the opening section of Pirozzo and Del Mar (2001). They specifically say that "Acute otitis media is a disease of infancy and early childhood defined by the presence of inflammation and fluid in the middle ear and accompanied by at least 1 sign of acute illness." You can find more information here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1275975/
What key adaptation allowed the ferns to be successful and populate more areas than the bryophytes?
Answer:
Possession of root, leaves and vascular/conducting tissues
Explanation:
Ferns and bryophytes are regarded as lower plants in botanical studies. Bryophytes have been in existence prior to the appearance of ferns. BRYOPHYTES are a group of non-vascular plants i.e. lack conducting tissues such as xylem, phloem etc. They include misses, liverworts and hornworts. Ferns, on the other hand, belong to a group of vascular plant species called PTERIDOPHYTES.
However, in terms of population and domination of the Earth, ferns are believed to be more successful than their counterparts (bryophytes). This is primarily because of the possession of true roots and vascular tissues like xylem (for conducting water), phloem (for conducting sugars) by FERNS making it easily adapted to life on land.
Tom looks out his window. Which observation includes a biotic factor of the ecosystem he is in.
A. It is raining.
B. There are worms on his sidewalk.
C. The water in his pond is higher than usual.
D. The clouds are darker than they had been a little earlier.
Answer:
B - There are worms on the sidewalk
Explanation:
Why is VRBA (Violet red bile agar) only pasteurized rather than sterilized prior to use?
Answer:
Explanation:
This is because Violet and red bike is only a selective medium that detect and analyse lactose coliform microorganisms that cause fermentation and this is present in diary products like milk. This is milk use for microbiological analysis of milk because of it ability to detect lactose which is a milk sugar. There fore it cannot be use for sterilization.
THERE IS MORE THEN ONE ANSWER ITS ASKING FOR A TOTAL OF TWO. Please help thanks! ILL GIVE BRAINLIEST!
Answer:
B and D
Explanation:
A student builds a model of a DNA strand.
BO
Which of these models of a DNA strand shows bases that are complementary to the ones on
the student's DNA model?
Biology
Answer:
There is no attachment to this question, however, the base sequence on the model built by the student is: CAGCCATC
The options of the bases on the complementary model are:
A) CTACCGAC
B) GUCGGUAG
C) GTCGGAAG
D) GTCGGTAG
The answer is D
Explanation:
A DNA molecule is a polymer biomolecule made up of nucleotide bases. It is a double stranded molecule, with each strand containing nucleotides held together by hydrogen bonds. The pairing of nucleotides in one strand of DNA to another follows the COMPLEMENTARY BASE PAIRING RULE, which states that Adenine binds to Thymine (A-T) while Guanine binds to Cytosine (G-C).
According to this question, a student builds a model containing the base sequence: CAGCCATC, the model that contains bases that are complementary to the ones built by the student is: GTCGGTAG
Answer:
D
Explanation:
CAN SOMEONE HELP!!!!!
Answer:
B and i think D
Explanation:
what are the hetrotypes
Answer: Hetrotypes are organisms (anything that lives) that can make it's own energy without absorbing it from other organisms. Example: Flowers, they get there energy from the sun, not from eating and absorbing other organisms.
Explanation:
ATG AATTCTCAATTACCT
TACTTAA GAGTTAATGGA
How many pieces of DNA would result from this cut
Today we use the word bureaucracy to refer to any organization that has many departments. T F
Today, the word "bureaucracy" is used to refer to any organization that has many departments, which is a false statement as bureaucracy is related to government administration.
What is the significance of the bureaucracy?The importance of bureaucracy includes making sure that governmental tasks are carried out effectively and efficiently by skilled professionals who are authorities in their fields and are capable of handling their tasks with a high degree of competence. They make sure that government policies are applied consistently and fairly. They are tasked with providing information and support to regular individuals who require it since they are a crucial part of public administration and governance.
Hence, today the word "bureaucracy" is used to refer to any organization that has many departments, which is a false statement as bureaucracy is related to government administration.
Learn more about the bureaucracy here.
https://brainly.com/question/2582252
#SPJ2
The long whip-like structure that helps a cell move and gather food is called a
A. flagella
B. cilia
C. false foot
D. whipper
Answer:
flagella
Explanation:
It helps the cell move
Yellowstone National Park there are rocks formed that are both extrusive and intrusive igneous rocks. It is important to note that the main difference between them is _________.
Question 6 options:
How they formed; intrusive rocks formed from lava and extrusive rocks are form from magma
How they formed; extrusive rocks formed from lava and intrusive rocks formed from magma
Where they are found; extrusive rocks are only found above ground
Where they are found; intrusive rocks are only found above ground
Answer:
The correct answer is - Where they are found; extrusive rocks are only found above ground
Explanation:
Intrusive and extrusive rocks are the two formed in Yellowstone natIonal park but there is how and where they formed that makes them different from one another. they both are igneous rocks.
The major difference between extrusive rocks and intrusive rocks is that extrusive rocks are formed on the surface or above the earth's surface from the lava that is magma thurst out from underground. Intrusive rocks are formed within the crust from the magma after cooling down and solidify.
If cells from one part of an embryo are transplanted to another part, and they develop into the tissue they would have made originally, the cells are said to be ____________ .
Answer:
determined
Explanation:
Determined cells are embryonic cells that will generate all the cell types of the adult organism, with this process being independent of environmental inputs. Cell determination is defined by specific gene expression patterns in embryonic cells. In consequence, cell determination is defined as a genetic process where a particular cell fate can be broken down into two different states: specified (committed) or determined. If a cell is in a committed/specified state, the cell's fate can still be reversed or transformed, while if a cell in a determined state, the cell's fate cannot be reversed or transformed.
Which describes an altocumulus cloud?
a.
high, feathery cloud
c.
low storm cloud
b.
puffy mid-level cloud
d.
high cloud made of ice crystals
Please select the best answer from the choices provided
A
B
C
D
Answer:
Puffy mid level-cloud.
Explanation:
So the answer is B. Got it right on edge 2021 Stay safe!!
Answer:
the answer is B.)
Explanation:
i did the quiz a week ago-
f f(x) = 5x + 40, what is f(x) when x = –5?
–9
–8
7
15
Answer:
15
Explanation:
Hope it helps!