Why is sodium acetate added during DNA extraction procedure?
A.
to break open the cells
B.
to precipitate DNA
C.
to dissolve lipid membranes
D.
to dissolve DNA
E.
to denature cellular proteins
Answer:
Polar bodies serve to eliminate one half of the diploid chromosome set produced by meiotic division in the egg, leaving behind a haploid cell.
Explanation:
Answer:
E. to denature cellular proteins for plato / edmentum
Explanation:
my notes say -
Protease enzyme, sodium acetate, or a phenol/chloroform mixture is added to cleave cellular proteins.
eukaryotic, multicellular, autotrophic, have a cell wall
Answer:
I think that would be organisms in the Plantae kingdom
Explanation:
1. "For oxygen to enter the blood, how must the concentration of O2 in the alveoli compare to O2 in the blood?" 2. "For carbon dioxide to leave the blood and enter the alveoli, how must the concentration of CO2 in the blood compare to CO2 in the alveoli?" 3. "When diffusion has reached equil- ibrium, we say that the net movement of the molecules is zero. Does movement stop? Explain."
Answer:
1. Concentration of O2 in the alveoli must be more than that of the blood
2. Concentration of CO2 in the blood must be more than that of the alveoli
3. Movement does not stop (find the explanation below).
Explanation:
Gaseous exchange i.e. taking in of O2 and taking out of CO2, takes place in the alveoli/air sac of the lungs. However, the movement in and out of O2 and CO2 from the alveoli into the bloodstream and vice versa follows the principles of SIMPLE DIFFUSION. Diffusion is the process whereby substances move from a region of high concentration to a region of low concentration until they are evenly distributed. Based on this, the following will occur:
1. The concentration of O2 in the alveoli must be more than that in the blood in order for oxygen to enter the blood via diffusion.
2. The concentration of CO2 in the blood must be more than that in the alveoli in order for carbon dioxide to leave the blood and enter the alveoli via diffusion.
3. When the rate of diffusion is at equilibrium i.e. no net movement is occuring die to equal concentration of the substance on both sides, the substances begin to move in the opposite direction at an equal rate. Note that, at equilibrium, MOVEMENT DOES NOT STOP, however, there is an equal rate of movement.
All unicellular organisms are prokaryotic.
True or false
Answer:
TRUE!! All prokaryotic organisms are unicellular.
Explanation:
Earwax can build up in which part of the ear and block the pathway of sound?
Answer:
The pinna
Explanation
The pinna's main job is to gather sounds and funnel them to the eardrum
Answer:
the answer is ear canal
Explanation:
Pls help I’m so confused :(
Answer:
Left is synthesis, right is digestion
Explanation:
Synthesis refers to the creation of a product, whereas digestion refers to the breakup of the reactant or initial substance.
It is important to protect water near the coast from sediment that may enter when land is disturbed for construction. This is because excess sediment may
Answer:
Excess sediment in water may cause a reduce in light penetration decreasing algae's(an important food source) ability to photosynthesize therefore not allowing it to grow. It will stop fish from seeing well enough to move around or feed. Sediment can clog fish gills, reducing resistance to disease and lowering growth rates.Certain chemical pollutants bind to sediment and so if there is excess sediment it can very rapidly change the water quality. These
chemicals that bind to the sediment are dangerous to small animals and plants as well as larger forms of life.
Explanation:
Each characteristic of an organism.
A.
DNA
B.
Trait
C.
Complementary Bases
D.
gene
Answer:
Most living organisms have
A. DNA
Explanation:
DNA Is all the info in our cells makes each organism what they are excet for some organisms like Eubacteria,some protista, and archaebacteria.
archaebacteria(The Bacteria that live in extremem places where no other organisms can live)
Some cells are specialized for
facilitated diffusion, a form of passive
transport. What sorts of structures
would these cells have more of?
Answer:
The cells specialized in passive diffusion have a greater amount of membrane structures called transport proteins.
Explanation:
Facilitated diffusion is a transmembrane transport mechanism, which consists of the passage of substances through the cell membrane by means of a transporter.This process does not require energy, as it is a passive transport, and depends on an ionic gradient or concentration.
The carriers of facilitated diffusion can be integral membrane proteins, so a cell specialized in this type of transport must have abundant transport proteins.
What cellular structure is responsible for the movement that occurs in image 3?
IMAGE ABOVE
O cytoplasm
O nuclear membrane
chromosomes
spindle fibers
Answer:
Spindle fibers because they split the cell
Explanation:
Explain the relationship between biotechnology and reproductive technologies.
Answer: In recent times, reproductive biotechnologies have emerged and started to replace the conventional techniques. It is noteworthy that for sustained livestock productivity, it is imperative to start using these techniques for facing the increasing challenges for productivity, reproduction and health with impending environment conditions. These recent biotechniques, both in male and female, have revolutionized
Explanation:yw
predict what would happen
to the biotic and abiotic factors in Fontanelle Forest and the surrounding
area ecosystem with the increase of deer.
Answer:
With increase of deer, there will be a decrease of producers.
Explanation:
Increasing of deer populations means decreasing of producers. As more and more deers are eating plants, the producer population will decrease. Thus, the producer population are in demand and deers will eventually need to fight for food with other deers–– this is known as competition, which is a biotic factor. An abiotic factor can be lack of oxygen once the producer population has been decreased due to the increase deer population.
Which type of bond is formed in nitrogen gas?
Answer:
Covalent bonds are formed in the nitrogen gas.
Explanation:
"Nitrogen atoms will form three covalent bonds (also called triple covalent) between two atoms of nitrogen because each nitrogen atom needs three electrons to fill its outermost shell (Lumen Learning)."
I hope this helps! Have a great day!
Last one is social issues ... please help asap ❤️
almost all energy comes from?
Answer: the sun
Explanation:
Please help me.
Which of the following describes photosynthesis?
Brainliest to whom ever is first and correct!
Thank youuuuuuuu.
Photosynthesis - the process that takes in matter from the sun and energy from carbon dioxide in the air and water from the soil to make glucose and oxygen.
Fats and oils are usually stored in a plant's
roots
stem
fruit
seeds
Answer:
stem
Explanation:
Answer:
well for me I think
Explanation:
it's in the stems
when you combine two or more substances and something new is created that is an example of
A) MATTER
B) PHYSICAL PROPERTIES
C) CHEMICAL CHANGE
D) PHYSICAL CHANGE
This is C)chemical change
For example combustion where an organic compound is turned into CO2 and water.
PLEASE HELP.. i have a time limit but if you give a correct answer i’ll give that brain thing TYSM
Answer:
#1, #2, and #4 are correct. #3 is incorrect.
Your body is a good conductor of electricity.
A. true
B. false
Answer:
false
Explanation:
PLEASE HELPPPPP!!!!!!!!!!!!!!
Describe how you can use a Punnett square to predict the probability that offspring will inherit a trait
Answer:
punnet squares show an estimated percentage
Explanation:
they determine the probability of an offspring having a particular genotype. u fill in the genotypes with the dominant and ressessive traits then u find the probalility of percentage. if it has moredominant traits as the percantage then it will be dominant if not it would be recessive
SOMEONE PLZ HELP ME Part B: Evaluating Results
Question 1
Explain why your model demonstrates how crossing over is important to genetic variation in a species.
Question 2
Look at the offspring you created in your model. Have any of the offspring inherited a more beneficial genetic combination than the others? How could this affect their survival? Explain your reasoning.
Question 3
Why is it impossible to predict the phenotype of the offspring by observing only the phenotype of the two parents?
Answer:
the last one is:
In the process of meiosis, alleles separate and are added to the gametes in an independent manner. While each gamete (egg or sperm cell) therefore contains one allele for each gene, it's impossible to know which allele, because alleles segregate in a random manner. However, it's possible to calculate probabilities that the offspring will have a given allele using Punnett squares.
Explanation:
Crossing over process results in new combinations of alleles in the gametes (egg or sperm) formed, which ensures genomic variation in any offspring produced.
What do you mean by crossing over process?Chromosomal crossover, or crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes' non-sister chromatids that results in recombinant chromosomes.
This process, also known as crossing over, creates gametes that contain new combinations of genes, which helps maximize the genetic diversity of any offspring that result from the eventual union of two gametes during sexual reproduction.
Crossing over is an enzyme-mediated process, where the exchange of genetic material between non-sister chromatids of homologous chromosomes takes place.
Learn more about crossing over:
https://brainly.com/question/27256451
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how does the sodium atom bond to the chlorine atom ?
Explanation:
It is happening when a sodium atom loses an electron to a chlorine atom and because of that sodium atom is becoming a positive sodium ion and the sodium ions and chloride ions form an ionic lattice.
Sodium - Na
Chloride - Ch
Sodium and Chloride are both elements that cannot be found separately and free in nature but they are found as bonded together.
just a simple multiple choice question. its times, ple help
Answer:
do you remember the questions?
Explanation:
The researchers predicted that for any particular concentration of substrate, the C. Aurantiacus enolase catalyzedreaction is more rapid at 55 C. Than at 37 C. Provide reasoning to justify the researchers prediction.
Answer:
It's justified because an increase in temperature will lead to increase in the enzyme catalyzed reaction
Explanation:
Now, as the temperature is increasing, the kinetic energy of molecules will also be increasing and this implies that the collision between the substrate and enzyme will increase i.e substrate that's attached to its appropriate active site of enzyme that results in an increase in reaction.
However, if the temperature is too high, it can cause the enzymatic activity to denature.
In summary, when talking about catalyzed reactions, an increase in temperature will cause the bond between molecules to loosen and this results in catalyzation.
Meditation is a practice of sitting still and quiet for minutes or even hours. It has been practiced for thousands of years and is even a part of religious practices for some people. Carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that helps people connect with their current surroundings and activities.
Are claims about the effects of meditation most likely scientific or pseudoscientific?
(Answer:) this is most likely to be scientific, (Explanation:) because, if you look at the question it says 'are the effects of medditadion scientific?... ect', and if you look back on your description of meditation, in the third sentence, they certainly state information based on scientific study!
Answer:
scientificExplanation:, because observations of brain growth and chemicals are made carefully and repeatedly
Just took the test.
beautiful clownfish named Bozo, a common salt water fish. Zara already has a tank with goldfish at home. Use your knowledge of diffusion & osmosis to tell Zara how to take care of Bozo.
Answer:
See the answer below
Explanation:
Zara should keep the clownfish and the goldfish in separate tanks - the goldfish in a freshwater tank and the clownfish in a salt water tank.
If the goldfish is kept in a salt water tank instead of freshwater, it may die due to dehydration because the salt water would be hypertonic to the cells of the fish. Water would move osmotically from the cells of the fish into the surrounding water and the fish may eventually die due to dehydration.
If the clownfish is kept in freshwater instead of salt water, it may die due to excessive water. The freshwater would be hypotonic to the cells of the fish and water would move osmotically from the surrounding water into the cells of the fish. Eventually, the cells would become turgid and may start lysing, leading to the death of the fish.
Bats,humans,and chimpanzees have similar structures to their front limbs. what is an example of this?
Answer:
Homologous traits.
Explanation:
I definately do not believe in the idea of homologous OR analogous traits, however, I do want to help you out and I can tell you what your textbook says: A homologous trait is any characteristic which is derived by evolution from a common ancestor.
A cell’s chromosome contains
1.genes
2.chlorophyll
3.sperm
4.eggs
Read the article to learn more about the human
chromosomes. Use chromosomes 11 and 17 to
answer the following questions.
List the genetic disorders found on chromosome
11.
Chromosome Map
Chromosome 11 is made of over
pairs.
million base
What do you know about any of those disorders?
Approximately how many genes are found on
chromosome 112|
Answer:
Down syndrome, Turner syndrome and Klinefelter syndrome.
Explanation:
Down syndrome, Turner syndrome and Klinefelter syndrome are the genetic disorders which are found in chromosome. Down syndrome is a common genetic disorder that occurs when a person has three copies of 21st chromosome. It is also called trisomy 21. Due to this disorder, delays occur in physical and mental developmental and disabilities of human body parts.
Answer:
1. Chromosome 11 is made of over 130 million base pairs.
2. Approximately how many genes are found on
chromosome 11? 2000
3. autism (neurexin 1), acute intermittent porphyria, albinism, ataxia-telangiectasia, Beckwith–Wiedemann syndrome, Best's disease, beta-ketothiolase deficiency, beta thalassemia.
4.Autism is related to some changes in chromosome 11, although it is characterized as a psychological disorder. It is usually identified in childhood, between 1 and a half years and 3 years, although the initial signs sometimes appear in the first months of life. The disorder affects the child's communication and ability to learn and adapt. Chromosome 11 Duplication Syndrome is a chromosomal alteration that interferes with child development, which may trigger motor, cognitive, language and socialization delays, inability to perform simple motor activities, weight and height deficit, facial dimorphisms and congenital malformations. Jacobsen's syndrome is an inherited disorder caused by the deletion of a specific region of the long arm of chromosome 11, which covers the 11q24.1 band. Patients with this disorder have a phenotype characterized by delayed neuropsychomotor development, craniofacial anomalies, diverse heart defects and blood dyscrasias. Signs and symptoms include: Heart defects; mental delay; difficulty feeding in childhood; attention deficit; hyperactivity; skeletal malformation, among others.
Hope this helps!!!
