In the DNA isolation process, detergent was used to:
--> facilitates homogenization. it allows the precipitate to form and stabilizes the DNA and it binds the negative ends of DNA.
Hope that helps!
True or false? pollen grains are the female gamete in the plant.
Answer:
True
Explanation:
Pollen consists of one or more vegetative cells and a reproductive cell. A pollen grain itself is not the male gamete. In angiosperms and certain gymnosperms, the vegetative cell forms the pollen tube that grows to meet the unfertilized ovules, and the reproductive cell is the source of the sperm.
The type of speciation that results in the formation of separate species as a result of geographic isolation is called ____________ speciation.
Answer:
allopatric speciation.
which abolitionist's life was most at risk? Explain
Answer:
PEOPLE KNOWN FOR: abolitionism. William Lloyd Garrison, American journalistic crusader who published a newspaper, The Liberator (1831–65), and helped lead the successful abolitionist campaign against slavery in the United States.
Explanation:
For white Southerners, Brown was the worst possible nightmare: a fearless, committed abolitionist, armed, accompanied by blacks, and willing to die to end slavery. Indeed, in the minds of Southerners, Brown was the greatest threat to slavery the South had ever witnessed.
Which type of vessels have a pulset A capillaries B lymph vessels C veins Darteries
Answer:
D:Arteries
Explanation:
Arteries carry oxygenated blood away from the heart to the tissues of the body. Veins carry blood depleted of oxygen from the same tissues back to the heart. The arteries are the vessels with the "pulse," a rhythmic pushing of the blood in the heart followed by a refilling of the heart chamber.
Monosaccharides disaccharides and polysaccharides are examples of.
Answer:
Sugars
Explanation:
Saccharide is another term used to describe sugars. The prefixes (mono = one, di = two, poly = more than two) represent how many glucose molecules are present in the overall molecule. Glucose is the base structure of sugars. Furthermore, all saccharides (sugars) are carbohydrates.
What is the function of the structure identified by the arrow?
O Mobility
O Protection
O Reproduction
O DNA transfer
Answer:
A. Mobility
Explanation:
Which of these types of fertilizers is the best for maintaining the long-term health of farm soil? (select all that apply) organic matter compost chemical fertilizers water, i have no idea what subject this is in so i put biology.
Answer:
water, compost , and chemical fertilizer
Water, compost , and chemical fertilizers is the best for maintaining the long-term health of farm soil.
What do you mean by chemical fertilizers?Chemical fertilizers, such as urea, diammonium phosphate (DAP), and single superphosphate (SSP), are used to maintain the shortage of nitrogen, phosphorus, and potassium in the soil.
Most fertilizers that are commonly used in agriculture contain the three basic plant nutrients: nitrogen, phosphorus, and potassium. Some fertilizers also contain certain "micronutrients," such as zinc and other metals, that are necessary for plant growth.
Chemical fertilizers will nourish your plant, but the minerals will not linger in your soil. By creating rich, nutrient-dense soil with organic materials, your lawn will have a better chance of thriving on its own tapping into stored minerals when needed.
Learn more about chemical fertilizers:
https://brainly.com/question/26154665
#SPJ2
What is an enzyme and what is biochemistry and what is enzyme theory?
An enzyme is a protein which acts as a biological catalyst. Biochemistry is the study of chemical processes within or related to living organisms and enzyme theory is the different theories on how enzymes work, either with 'lock and key' method or enzyme-substrate complex theory.
what happens to excess fatty acids and glycerol in the body
Answer:
The fatty acids are absorbed by the adipocytes, but the glycerol and chylomicron remnants remain in the blood plasma, ultimately to be removed from the circulation by the liver.
Explanation:
What are forms the structural and functional
component of cells
Answer:
Cell Structure. The cell structure comprises individual components with specific functions essential to carry out life's processes. These components include- cell wall, cell membrane, cytoplasm, nucleus, and cell organelles.
One mechanism the kidney uses to raise systemic blood pressure is to.
Answer:
increase secretion of renin by the juxtaglomerular complex
Explanation:
Substance A has an LD50 of 3 milligrams per kilogram of body mass for a species of fish. Substance B has an LD50 of 10 milligram per kilogram of body mass. Which substance is considered more deadly?
Substance A
Substance B
They are equally deadly.
This cannot be determined without the ED50.
Answer:
LD50 means a lethal dose of a particular substance or drug is given to a group of animals in a test group. This dose has the ability and capacity to kills 50% of the population of the test group of animals.
If Substance A has an LD50 of 20 mg/kg of body mass, this means that for 1 kg of body mass, 20 mg of substance A can kill 50% of the population that substance A was given to the test group.
If Substance B has an LD50 of 10 mg/kg of body mass, this means that for 1 kg of body mass, 10 mg of substance A can kill 50% of the population that substance B was given to the test group.
Therefore, Substance B is deadlier than Substance A because the quantity of substance B (10mg) is less than the quantity of Substance A (20mg) and it has the same lethal effect on the population.
Explanation:
pls mark me as brainlist
Answer:
B
Explanation:
Substance B is deadlier than Substance A because the quantity of substance B (10mg) is less than the quantity of Substance A (20mg) and it has the same lethal effect on the population.
How is the reproductive rate of marine mammals
related to their status in regards to extinction?
Answer:
The fewer fish the less that can reproduce.
Explanation:
marine mammals with a slower reproductive rate are especially sensitive to disturbance , environmental changes and anthropogenic sources of stress because when populations of these organisms decline, recovery is especially slow . it takes a significant amount of time for these animals to reach reproductive maturity and they are commonly heavily invested in raising only one or two young ones every two to three years on average . therefore , populations of marine mammals with slow reproduction are in imminent danger when multiple sources of envirnmental pressure are acting in tandem over an extended period of time . The fewer fish the less that can reproduce.
More the reproductive rate, lesser the extinction and lesser the reproductive rate, more is the extinction.
What is reproductive rate?
The reproduction rate measures the conditions under which generations are replaced. This calculation can be made taking account of mortality (net reproduction rate) or without mortality (gross reproduction rate).
What is extinction?Extinction is a situation in which something no longer exists.
When the reproductive rate of marine mammals will be less, they will not be able to cover up the loss/death of their species caused by any reason and will ultimately lead to extinction.
To know more about reproductive rate and extinction here
https://brainly.com/question/23546472
#SPJ2
What is the role of guard cells in photosynthesis?.
Answer: To use Osmotic pressure to open and close Stomata, allowing plants to regulate the amount of water and Solutes within them.
Explanation:hope this helps :3 have a nice day xlXCherryColaXlx...(pls mark Me brainliest)
1. *All of the following statements about invasive exotic species are true EXCEPT:
a. They may compete with native species for food.
b. They may prey on native species.
They are generally introduced by human activity.
d. They may be plant or animal species.
e. They tend to have low reproductive rates.
Invasive species are usually competitors, predators, high reproducers, and are mostly introduced by humans activities.
What are invasive species?They are plant or animal species that invade ecosystems.
They are mostly introduced to ecosystems from another ecosystem and once they establish themselves, end up out-competing native species for resources.
Invasive species generally have high reproductive capacity and efficient dispersal mechanisms.
More on invasive species can be found here: https://brainly.com/question/21452505
44) A fishing practice that is commonly used to catch large solitary species of fish and was featured in The Perfect Storm is ________________________.
A fishing practice that is commonly used to catch large solitary species of fish is referred to as Long line fishing.
What is Long line fishing?
This practice involves the use of a long main line attached to several hooks at various intervals.
This helps to catch large solitary species of fish and was featured in The Perfect Storm.
Read more about Long line fishing here https://brainly.com/question/15378610
answer asap!!
------------------------------------------------
identify the structures below
Label A
______
Label B
______
Label C
______
Label D
______
Label A
Rna
Label B
rna becoming dna
Label C
dna
Label D
nucleus
Elisabeth is an oceanographer. On which of the following research expeditions would she travel from the photic zone to the aphotic zone?
A.) A snorkel trip from the intertidal zone to 55 feet off the beach
B.) A scuba trip from the surface down 100 feet
C.) A submersible traveling from the ocean surface to the abyss
D.) A research vessel from the beach to the open ocean
A research expedition traveling from the photic zone to the aphotic zone, is a submersible traveling from the surface of the ocean to the abyss.
What is aphotic zone and photic zone?Depending on the lighting, the waters are divided into:
PHOTIC ZONE → up to 200 m deep. DYSPHOTIC ZONE → between 200 m and 400 m deep. APHOTOTIC ZONE → below 400 m depth.With this information, we can conclude that a research expedition traveling from the photic zone to the aphotic zone, is a submersible traveling from the surface of the ocean to the abyss.
Learn more about aphotic zone and photic zone in brainly.com/question/1350513
#SPJ1
Answer:
A submersible traveling from the ocean surface to the abyss
Explanation:
Which endocrine gland would provide a burst of energy to a person moving out of
the way of a speeding bicycle?
(A) adrenal
(B) parathyroid
(C) pituitary
(D) thyroid
Answer:
the correct answer would be D
Explanation:
The endocrine gland that would provide a burst of energy to a person moving out of the way of a speeding bicycle is the adrenal gland, which is in Option A, as the adrenal glands are located on top of each kidney.
What is the adrenal gland?The adrenal gland is an endocrine gland located on top of each kidney. It is divided into two parts: the adrenal cortex and the adrenal medulla. The adrenal cortex produces hormones such as cortisol, aldosterone, and sex hormones, which are involved in a variety of processes in the body, including metabolism and salt and water balance. The adrenal medulla produces hormones such as adrenaline and noradrenaline, which are involved in the "fight or flight" response.
Hence, the endocrine gland that would provide a burst of energy to a person moving out of the way of a speeding bicycle is the adrenal gland, which is in Option A.
Learn more about the adrenal gland here.
https://brainly.com/question/23487477
#SPJ7
Which statement describes the effects of farming practices such as the overuse of irrigation water?
what did the large prokaryotic cell provide the mitochondria and/or chloroplast ancestors?
Mitochondria and chloroplasts likely evolved from engulfed prokaryotes that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion.
hope this is what your looking for
How do organisms acquire the energy they need to live?
Organisms generate their own energy to live.
Organisms acquire energy from the temperature of the Earth.
Organisms acquire energy from hydrolysis.
Organisms capture energy from the environment
if we have red veins and red blood how do we have blue veins in our bodies FIRST ONE TO ANSWER AND EXPLAIN GETS BRAINILEST PLEASE HELP
Answer:
The colors we see are the result of which wavelengths of light are reflected back to our eyes. Veins appear blue because blue light is reflected back to our eyes.
Blue light does not penetrate human tissue as deeply as red light does. As a result, veins that are close to the surface of the skin will be more likely to reflect blue light back to the eye.”
In short, our veins appear blue because of a trick that light plays on our eyes and how the light interacts with our body and skin. All color works this way as light is a combination of all colors and when it reflects off of certain materials, it absorbs some colors and bounces back others to our eyes.
Explanation:
Have a great day!
Pls Mark me brainliest!
1. Which of the following correctly pairs a cellular structure with its function?
(A) Nucleus .. protein folding
(B) Chloroplast.. photosynthesis
(C) Peroxisome. . glycolysis
(D) Flagellum.. mitosis
(E) Mitochondrion .. secretion
What is the right answer?
Answer:
I believe the correct answer is c
Explain how the generation of electricity by hydroelectric, tidal
and wind sources are similar to each other.
Hydroelectric, tidal and wind sources are similar in the sense that are all renewable sources of electricity generation.
Generation of electricityElectricity is generated in many ways. Some of the ways are renewable while some of the ways are non renewable. The renewable means of generation can be reused while the non renewable can not be reused.
Now, hydroelectric, tidal and wind sources are similar in the sense that are all renewable sources of electricity generation.
Learn more about renewable sources of electricity: https://brainly.com/question/13258110?
Answers are very much needed.
AnswerAnswer:
The answers are 1, 2 and 3
Explanation:
Explain why scientists have classified protists in one kingdom when they are such a diverse group.
Explain why scientists have classified protist in one kingdom when they are such a diverse group? This kingdom is necessary for the classification of all organisms that don't fit into the other kingdom categories.
evidence or data that will prove it will help with deforestation
Answer:First of all, we should afforestation which is growing of trees in the forest
Explanation:
Describe the effect of adding trytophan to a culture of E. coli
Answer: High tryptophan: The tryptophan binds to the trp repressor and causes it to change shape, converting into its active (DNA-binding) form. The trp repressor with the bound tryptophan attaches to the operator, blocking RNA polymerase from binding to the promoter and preventing transcription of the operon.
Explanation:
Question 3
Yeast can perform both anaerobic and aerobic respiration. Does the experiment demonstrate this fact? Explain your reasoning.
Answer:
Yeast can carry out both anaerobic respiration (fermentation) and aerobic respiration.
Explanation:
Both produce carbon dioxide, fermentation produces a much lower amount of ATP. Fermentation produces ethanol.
Answer: Yes.
Explanation:
it do demonstrate the fact because it has 2 different ways of testing whether or not oxygen effects the production of foam in the glasses.
