Answer:
Owing to variations in solubility, molecular mass, and hydrogen bonding with the surface, the molecules migrate, or travel up the paper, at various
Question:What three factors affect the rate at which pigments migrate?
HELP HELP HELP HELP HELP
Which best describes the relationship between DNA, geans, and chromosomes?
Answer: Genes are segments of DNA which form tight coils called chromosomes.
please please help ! The results of gel electrophoresis are shown below, with four different
strands of DNA labeled.
electrode
II
Il kolle
The
Which strand of DNA is the shortest?
O A. 1
O B. 3
C. 2
O D. 4
Answer:
1
Explanation:
<3
The strand of DNA which is the shortest is 1 and is denoted as option A in this scenario.
What is DNA?This is referred to as deoxyribonucleic acid and contains the genetic components in organisms.
From the chart we can deduce that the shortest strand and most appropriate choice is 1.
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Which happens during crossing over?
A. Two sex cells join together and combine DNA.
B. Genes are exchanged between two alleles.
C. Genes are exchanged between two egg cells.
D. Chromosomes line up randomly during metaphase I.
1. How are the colors of the rainbow related to white light from the sun?
White light contains only the four secondary colors of the rainbow.
White light does not contain any of the colors of the rainbow.
White light contains only the three primary colors of the rainbow.
White light is made up of all the colors of the rainbow.
Answer:
And? What is the questIon??
Explanation:
Which forensic scientist's work involves knowing how a body decomposes?
Forensic sociologist
Forensic psychiatrist
Digital forensics expert
Forensic entomologist
Answer:
Forensic anthropology or forensic entomologist.
Explanation:
Name the organism that is both a secondary and tertiary consumer.
Answer:
The hawk is both a tertiary and secondary consumer.
Explanation:
HELP ME PLEASEEE I WILL GIVE BRAINLIESTttttttt
Answer:
h
Explanation:
h
What is photosystem 1 and photosystem 2 and what do they do? What are the steps ?
P I and PII are proteic compounds present in the thylakoid membrane that contain about 300 chlorophyll molecules each.
Step IFirst of all light with a wavelength of 690nm is absorbed by P II. The light excites an electron that leads to the photolysis of water(H2O--->2H+ +2e- + 1/2O2). The two electrons released go into the electron transport chain. The second compound in electron transport chain is plastoquinone that is reduced when it accepts electrons then oxidised when it loses them to P I. The next two compounds are cytocromes that make hydrogen protons go inside the thylakoid when they recieve the electrons.(I will mention what happens to the H+ in the second step). The next compound in the electron transport chain is a compound that contains Fe and S. The electrons finally reach the last step: Reduction of NADP+ to NADPH+H+.
Step IIIn the second step is ATP synthesis. Hydrogen protons accumulate inside the thylakoid membrane. An electrochemical gradient is formed. The protons can leave the thylakoid according to this gradient through an enzyme.
When the protons flow through , it turns ADP into ATP.
To sumarize: the role of P II is O2 production through photolysis and ATP synthesis(indirectly) The role of P I is NADPH+H+ synthesis.
Please help, if question is right I will give brainliest.
Answer:
Flagella
Explanation:
The flagella or flagellum has a long, tail-like extension.
2. ich part of the plant takes in carbon dioxide
form the air for Photosynthesis ?
a) root hair
b)stomato
c)Leaf veins
d)petals
What are the limits to natural selection?
Answer:
1.a change in environmental conditions , which can lead to such an adaption only for genetic trials already present in a populations genepool , or for traits resulting from mutations
2.heredity
3.Reproduction
variations in physical characters
Cells used a molecule called what to store and release energy
Answer:
ATP
Explanation:
big brain pls give brainliest
After pollen grows a tube down the style
A egg cells unite with an embryo
B chromosomes split in half
C the pollen sticks to the stigma
D sperm cells travel to the ovary
Answer:
D
Explanation:
sperm cells travel to the ovary for fertilization
Which of the following traits could be passed
down (inherited) from parents?
Having blue eyes
O knowing how to ride a bicycle
O Knowing how to read
Having short fingernails
Answer:
Have blue eyes
Explain how bacteria can be genetically engineered to produce a human protein.
Answer:
Recombinant DNA is a technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. ... There, the recombinant bacteria use the gene to begin producing human insulin.
Explanation:
Hopefully this helped!
Genetic engineering involves modifying the genetic material of an organism, such as bacteria, to introduce new characteristics or functions. One application of genetic engineering is to use bacteria to produce human proteins, which can be used for various medical purposes such as in vaccines or as therapeutic agents.
What is the first step for the process ?Isolate the gene for the human protein: The first step in genetically engineering bacteria to produce a human protein is to identify and isolate the gene that codes for the protein. This can be done using various techniques, such as polymerase chain reaction (PCR) or DNA sequencing.
Insert the gene into a bacterial vector: Once the gene for the human protein has been isolated, it is inserted into a bacterial vector, which is a small circular piece of DNA that can replicate independently within the bacterium. The vector is usually a plasmid, which is a type of DNA that can be easily manipulated and introduced into bacterial cells.
Introduce the vector into bacteria: The next step is to introduce the vector carrying the human gene into the bacteria. This can be done using various techniques such as electroporation, heat shock, or transformation.
Allow the bacteria to produce the protein: Once the vector carrying the human gene is inside the bacterial cell, the cell can begin to produce the human protein. The bacterial machinery reads the genetic code in the gene and synthesizes the protein.
Extract and purify the protein: After the bacteria have produced the protein, it can be extracted and purified. This involves breaking open the bacterial cells to release the protein, and then using various purification techniques to isolate and purify the protein.
Test the protein for activity and safety: Finally, the purified protein is tested to ensure that it is active and safe for use in humans. This can involve various assays and tests to confirm the protein's function and purity.
In summary, genetic engineering can be used to introduce the gene for a human protein into bacteria, allowing the bacteria to produce the protein, which can then be extracted, purified, and tested for medical use. This process can be used to produce a wide variety of human proteins, including hormones, enzymes, and antibodies.
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Which crop is preferably harvested by hand?
A. Wheat
B. Rice
C. Potato
D. Grapes
The Gulf of Mexico dead zone that forms each summer at the mouth of the Mississippi River is caused largely by the input of agricultural fertilizers that stimulate phytoplankton blooms, which die, and are subsequently consumed through bacterial decomposition. Decomposition consumes oxygen, leading to very low dissolved oxygen levels and subsequent death or emigration (i.e. leaving the area) of fish and other marine life. Many scientists advocate creating wetlands (as well as restoring them) as a strategy to reduce the severity and extent of the dead zone. The idea is that the plants in the wetlands will remove these nutrients from the water (during growth) and prevent their washing into the river and the Gulf of Mexico. Would the use of created wetlands be considered biotechnology
Answer:
Yes; the use of created wetlands would be considered biotechnology.
Explanation:
The created wetlands will employ the use of scientific tools and techniques, which will largely modify the plants, animals, and microorganisms in the Gulf of Mexico's dead zone. Generally, it has been established that biotechnology allows farmers to grow more food with environmentally sustainable farming techniques, which also improve soil conservation.
Answer:
Yes, the use of created wetlands would be considered biotechnology.
Explanation:
Biotechnology uses biological systems and living organisms to develop and create different products. The new wetland that they create will be made with the usage of scientific tools and techniques in order to replicate an already existing biological system. It will have very modified plants, animals and other organisms in the Gulf of Mexico's dead zone.
When a cold air mass replaces a warm air mass, it's called an)
front.
A. Stationary
B. Warm
C. Occluded
D. Cold
When a cold air mass replaces a warm air mass, it's called a Cold front (Option D).
What is a Cold front?A cold front is a limit between two masses of air (one mass that is cool and the other that is warm).
This cold front may be very unstable and thus may be associated with the presence of storms.
In mid-higher latitudes, cold fronts generally advance the Equator by pushing the warm air up.
In conclusion, when a cold air mass replaces a warm air mass, it's called a Cold front (Option D).
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Which parts of the water cycle the water molecules to give away heat energy?
Answer:
evaporation i think but im not sure
Explanation:
Answer:
condensation
Explanation:
Precipitation, runoff, infiltration, and ground water. Is the source of energy that drives earths water cycle. The sun. As heat energy was added to the water, it changed states from. A liquid to a gas. This gas is called water vapor. As more energy is added to the water, the water molecules move.
Your labmate's ligation reaction didn't work. The regular ATP had run out, so he fueled the reaction with dATP from the PCR kit. What advice can you give him
Answer: adding heat to the ligation reaction to provide energy to the system, instead of ATP.
Explanation:
Ligation is referred to as an act of joining, and the term refers in biology to an enzymatic reaction that joins a covalent bond between two biomolecules. The application of DNA ligation in research in molecular biology is defined in this video.
This table shows how the levels of classification have changed with each major scientist.
Which number belongs in the space labeled X?
A. 5
B. 7
C. 8
D. 10
Answer:
Woese increased the number of levels of Hierarchy from 7 to 10, therefore the answer is D. 10
Explanation:
Carl Woese classified the three domains of life so 10 belongs in the space labelled X.
Who was Carl Woese?Carl Richard Woese was a microbiologist and biophysicist from the United States.
Woese is best known for identifying the Archaea (a new category of life) in 1977 through the phylogenetic taxonomy of 16S ribosomal RNA, a technique he pioneered and which revolutionized microbiology.
In 1967, he also proposed the RNA world idea, though not under that name.
Woese was a professor of microbiology at the University of Illinois in Urbana–Champaign and held the Stanley O. Ikenberry Chair.
Woese classified the various living forms into three categories:
Eubacteria, Archaebacteria, and Eukaryotes.
The three-domain classification is also useful for determining the evolutionary relationships between organisms.
Hence, the correct answer is D i.e. 10
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QUESTION GUIDE 3 EXIT TEST
COLOR THEME
Q ZOOM
3. In a particular species of squirrel, red hair is dominant
over white hair. What is the expected phenotypic result
of the offspring produced by two parents, HH x Hh?
O
50% red hair, 50% white hair
100% white hair
0 0 0 0
100% red hair
75% red hair, 25% white hair
CLEAR ALL
O 10
NEXT >
REVIEW & SUBMIT
(PREVIOUS
Answer:
100% red hair.
Explanation:
All of the offspring will inherit the dominant trait for red hair, and since the dominant trait is always shown over the recessive, they will all have red hair.
how is the top layer of the ocean different from the deepest layer
Answer:
It gets colder and denser as you go deeper
Explanation:
Answer:
There is way less warmth, and sunlight, And way more pressure.
Explanation:
What is a stomata?
A. the little mouths on the leaf of a plant where they take in CO2,and release 02
B. Where the plant takes in water
A. the little mouths on the leaf of a plant where they take in CO2,and release 02
stoma=mouth
Those structures are located on the backside of the leaf
What may happen if tectonic plates stopped moving?
A) Ocean water will freeze.
B) There will be no new mountain formations.
C) Volcanic activity will increase.
D) Continents will move towards the poles.
Answer:
b
Explanation:
b
Answer:
c
Explanation:
According to the visual, which three continents, as of 2004, are the largest consumers or energy per capita?
Answer:
the first largest consumer is china,then next united state and the third is canada
Read Changes on Earth and Changes in Life. Explain how changes in Earth’s systems affect the growth of life on Earth. Use evidence from the text to support your answer.
Any changes on earth has a big effect on life in general like for instance rock reformation volcanoes eruption and global warming has made a huge impact on our environment as earthquake or volcanoes occur it has changes the formation of our earth causing ocean water to reach high tides that can even cause tsunami's that cause a lot of trouble in rare cases due to the intensity of the movement A another example is Australia wild fires in this phenomenon caused a lot of people to evacuate their home and animals losing their habitat and making our air quality worse and it affects a lot more people aspects in life and people in so many ways like now there home where burned down they might be homeless and that is my explaining on how earth systems affects the growth in our life, earth.
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Which of the following human actions could have a positive impact on local ecosystems?
Choose 1 answer:
A) Clearing forests to make way for new farms
B) Using renewable resources
C) Producing waste during technology development
D) Increasing the use of pesticides to protect crops

pls don’t answer if you don’t know, i need to pass this test.
Answer:using renewable sources
Explanation:
All the others are bad for the environment
Is e.coli similar to or different to animal cells
Answer:
I'm going to say that the e.coli is different from the animal cell.