PLZ HELLLP TONS OF POINTS (this is on a FINAL)
two students are comparing scientific experiments to investigations. They came up with the following ideas.
Student A: Testing plant growth in different types of soils
Student B: Comparing the water level in a lake during different times of the year
Which student gave an example of a scientific experiment?
Student A because it requires experimental and control groups
Student B because it requires a hypothesis
Student A because it is preferably done in natural settings
Student B because it is preferably done across a long period of time
Answer:A
Explanation:
Your skin is an example of a nonspecific defense mechanism. Why is it called a nonspecific defense mechanism?
A. becuase it protects against any invader regardless of type
B. because it has to be 'alerted' that a foreign invader has been spotted
C. because it alerts the immune system when a foreign invader is spotted
D. because it protects against a specific type of pathogen
Answer:
A is the answer
Explanation:
This is what skin does, it blocks outside material from getting into the body regardless of what it is.
What the answer for this pls
Answer:
A. Help from bystanders can mean the difference between life and death.
Explanation:
The article is talking about saving someone's life by using CPR or the Heimlich maneuver, and how to do it.
Study the energy pyramid.
In this pyramid, what level is the frog?
Answer:
Tertiary consumers i think
Extensive damage to oligodendrocytes in the CNS could result in reduced speed of nerve impulses. a breakdown of the blood-brain barrier. loss of the structural framework of the brain. inability to produce scar tissue at the site of an injury. decreased production of cerebrospinal fluid.
Answer:
Loss of the structural framework of the brain.
Explanation:
Damage to oligodendrocytes in the central nervous system leads to the loss of the structural framework of the brain. oligodendrocytes produce the insulating sheath of axons and we know that axons are the nerve fiber that conducts electrical impulses away from the neuron's cell body. Axons are the primary transmission lines of the nervous system that carries impulse throughout the body so if the oligodendrocytes are damaged then our brain did not work properly.
If oligodendrocytes are damaged, the myelin sheaths around axons can be destroyed. This can lead to a loss of the structural framework of the brain, as the axons will no longer be properly insulated. Hence option C is correct.
Oligodendrocytes are glial cells in the central nervous system (CNS) that are responsible for myelinating axons. Myelin is a fatty sheath that surrounds axons and helps to speed up the conduction of nerve impulses.
The loss of the structural framework of the brain can cause a variety of neurological problems, including:
Reduced speed of nerve impulses. As mentioned above, myelin sheaths help to speed up the conduction of nerve impulses. Without myelin sheaths, nerve impulses will travel more slowly, which can cause problems with coordination, movement, and sensation.
Increased risk of seizures. Seizures are caused by abnormal electrical activity in the brain. When the myelin sheaths around axons are damaged, it can increase the risk of seizures.
Cognitive impairment refers to a decline in thinking and memory skills. Damage to oligodendrocytes can lead to cognitive impairment, as the axons will no longer be able to function properly.
Therefore, option C) loss of the structural framework of the brain is correct.
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Please help!! I'll give brainlist!!!
Answer:
C. The Bluegill population would increase, but the other organisms would not be affected.
Explanation:
Bluegill are eaten by bass. Bass would be what keeps the Bluegill population under control, but with the bass population decreasing, Bluegill would eventually overpopulate.
A prospective groom, who is healthy, has a sister with cystic fibrosis (CF), an autosomal recessive disease. Their parents are normal. The brother plans to marry a woman who has no history of CF in her family. What is the probability that they will produce a CF child? They are both Caucasian, and the overall frequency of CF in the Caucasian population is 1/2500—that is, 1 affected child per 2500. (Assume the population meets the Hardy-Weinberg assumptions.)
Answer:
Explanation:
From the given information:
Since the parent are normal; Let assume that their trait is Pp
The affected sister will be recessive in nature, so the trait will be pp
Now, the husband who is the groom will be a carrier with a probability of 2/3 since her sister is affected.
Also, the wife will be carrying a heterozygous trait since she is normal as well.
However, using Hardy-Weinberg assumption:
[tex]q^2 = \dfrac{1}{2500}= 0.0004[/tex]
[tex]q = \sqrt{0.0004}[/tex]
q = 0.02
Recall that:
[tex]p+q =1 \\ p = 1 - q \\p = 1 - 0.02 \\p = 0.98\\[/tex]
Thus, [tex]p^2 = (0.98)^2[/tex]
[tex]p^2 = 0.9604[/tex]
[tex]2pq = 2 \times 0.98 \times 0.022[/tex]
2pq = 0.0392
Finally, the required probability that there will be an affected offspring amongst the family is:
[tex]= \dfrac{1}{4} \times \dfrac{2}{3} \times 0.0392[/tex]
[tex]= \dfrac{1}{153}[/tex]
Briefly explain the nature of scientific inquiry. Include discussion of the role that evidence and falsifiability play in the process. Is this a strength or a weakness of the scientific mode of
thinking?
Answer:
Science is a process that involves proof and error. Scientific hypotheses are used to find evidence supporting scientific statements, but new evidence can be used to reject previously accepted ones in order to get closer to the truth.
Explanation:
Scientific inquiries refer to the processes by which scientists study phenomena of the natural world and propose alternative explanations (hypotheses) useful for understanding such mechanisms. When hypotheses are supported by many evidence and studies from different sources, scientific theories associated with these hypotheses become accepted by the scientific community. In science, a scientific statement may become falsifiable when it is contradicted by new lines of evidence and/or new observations.
The word root infect means which of the following?
Answer:
late 14c., "fill with disease, render pestilential; pollute, contaminate; to corrupt morally," from Latin infectus, past participle of inficere "to stain, tinge, dye," also "to corrupt, stain, spoil," literally "to put in to, dip into," from in- "in" (from PIE root *en "in") + facere "to make, do, perform" (from PIE root *dhe- "to set, put").
Explanation:
34:58
What is the source of energy that drives photosynthesis?
O sunlight
hydrogen ions
o electrons
O oxygen
"pe here to search
O
Desktop
Answer:
Sunlight
Explanation:
Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct. Therefore, it is sunlight.
What are the important plants in agriscience?
Answer: Major grain crops are corn, wheat, barley, oats, rye, rice, sorghum, and soybeans. Less than 10 percent of the corn grown in the U.S. is for human consumption. Legume plants such as dry beans and peas are important foods in the diet of many Americans and people around the world.
Explanation:
CCG GAT TTT AAT TAG CTA CTA TCG TAC TAC GTT GGT GCT
make complementary dna
Answer:
CCG GAT TTT AAT TAG CTA CTA TCG TAC TAC GTT GGT GCT.
Explanation:
I have no idea what you are trying to do.
sorry
Before 1896, many scientists concluded that light could not pass through black paper. In 1896, Henri Becquerel observed that uranium salts could cause a plate covered by black paper to react as if light had reached it. How did this observation affect conclusions about light passing through black paper?
A- Scientists ignored Becquerel’s evidence because uranium is dangerous to use, so his study was not valid.
B- Scientists repeated Becquerel’s experiment until it no longer worked and reported that his conclusions were not valid.
C- Scientists had to revise their earlier conclusion because evidence from Becquerel did not support the original conclusion.
D- Scientists stood behind the earlier conclusion that black paper blocks light because it was already an accepted conclusion.
Answer:
D
Explanation:
So, I mean it’s kinda hard to explain given that it just makes sense and I took the test and I was right soooooooo
Yeah
Scientists stood behind the earlier conclusion that black paper blocks light because it was already an accepted conclusion. Therefore, option (D) is correct.
What happens to light on the black paper?A sheet of black construction paper would obstruct light when you tried to shine a flashlight through it. The other side would not be able to see the light, and it would not be reflected. A black item absorbs all light waves and transforms them into heat, which causes the object to warm up.
Uranium, according to Henri Becquerel's theory, would absorb light and reemit it as x-rays. The uranium was placed on photo plates by him. When the plates were developed, he saw that the uranium had in fact been generating radiation resembling x-rays.
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10
Select the correct answer.
Which important biochemical process receives a supply of NAD+ions from the fermentation process during anaerobic respiration?
OA Calvin cycle
OB. .
electron transport system
oc glycolysis
OD. Krebs cycle
OE proton pump mechanism
Reset
Next
Answer:
it is c: glycolysis
Explanation:
its correct on edmentum
Glycolysis is a process of biochemical importance which receives a supply of NAD+ions from the fermentation process during anaerobic respiration. Therefore, option (C) is correct.
Glycolysis occurs in both aerobic and anaerobic respiration and is a metabolic process. During anaerobic respiration, glycolysis is the only process that produces ATP.
In the absence of oxygen, the electron transport chain cannot function, and therefore, the Krebs cycle and electron transport system are not active. Therefore, glycolysis is the correct answer.
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In a food pyramid, what trophic level do decomposers get their food from?
Select one:
All levels of the pyramid.
Producers only.
Producers and primary consumers.
Primary consumers and secondary consumers.
Answer:
They are the “last trophic level” in some hierarchies because they feed on everything (National Geographic). However, according to the strict trophic level definition they would be primary consumers.
Explanation:
Every organism needs energy to survive. A process in which oxygen is combined with the
breakdown of sugar (glucose) molecules, releasing energy and giving off carbon dioxide and
water, is known as which of the following reactions?
a. Transpiration
b. Cellular Respiration
C. Carbon Fixation
d. Photosynthesis
The gastrointestinal tract is absent in
Hypothesize a reason as to why vaccinations were successful in immunizing an individual for the smallpox virus?
Answer:
vaccine make people immune to small pox
Which of the following statements about green exercise is true?
Environmental health
Answer:
we cant see the statement
Explanation:
PLEASE HELP ME OUT KINDA URGENT
Answer:
the first one
Study the image of a plate boundary. The Asthenosphere is being divided by the Lithosphere on the left of the diagram. Oceanic crust is above the Lithosphere and continues until it reaches the Continental crust on the right. The Lithosphere layer on the right is moving left toward the Lithosphere layer on the left that is moving right and down. Two volcanoes are above the area where the lithosphere layers meet. Which feature is forming? mountain rift valley earthquake island chain
Answer:
Sorry about the guy above me lolz, the answer is A :))
Explanation:
Have a great day !! muah
Answer:
It is island chain which on mine is D
Explanation:
Please help me, brainlist will be givin.
Answer: mouth- D, liver- A, salivary glands- B, Stomach- C, Large intestine- E, Intestinal villi-F, Mechanical digestion- G, Small Intestine- H, Gallbladder- I. brainliest?
Explanation:
When the North Pole is tilted closest towards the sun, it is possible for areas within the Artic Circle to experience 24 hours of sunlight.
A. True
B. False
Choose The Correct Answer.
Answer:
true
Explanation:
In the citric acid cycle when an aldol addition occurs in a biological system, how do the amino acids contained in the Citrate Synthase enzyme help facilitate the reaction
Answer:
Citrate Synthase facilitates the formation of citrate by deprotonating Acetyl CoA and by protonating the carbonyl oxygen of oxaloacetate
Explanation:
Citrate synthase is a key enzyme in the citric acid cycle that functions to catalyze the formation of citrate from oxaloacetate and acetyl-CoA: acetyl-CoA + oxaloacetate + H2O >> citrate + CoA-SH (Coenzyme A ). This enzyme contains three amino acids at its active site that work together to catalyze the conversion of acetyl-CoA and oxaloacetate into citrate. This active site acts by abstracting (deprotonating) a proton from the alpha carbon of Acetyl CoA which serves as the nucleophile. Subsequently, the active site of the enzyme also protonates the carbonyl oxygen of oxaloacetate, which then suffers nucleophilic attack and thereby facilitating nucleophilic substitution reaction.
what grow downward into the soil to form roots
please answer fast
Answer:
Explanation:
The primary root, or radicle, is the first organ to appear when a seed germinates. It grows downward into the soil, anchoring the seedling. In gymnosperms and dicotyledons (angiosperms with two seed leaves), the radicle becomes a taproot
The agricultural biotech company you work for has tasked you and your co-worker to genetically engineer a plant that produces more oxygen that at the same time also produces more sugar. Your co-worker states that this is impossible.
Questions: Based on what you've learned how would you respond to your co-worker?
What is your opinion of the ethics of manipulating crop plants in such a way?
Answer:
- The co-worker is wrong, it is indeed possible
- Genetically engineered plants may represent a milestone to alleviate hunger in the world
Explanation:
During photosynthesis, plants use carbon dioxide (CO2) from the air and water (H2O) from soil and rain in order to produce oxygen and glucose, which is a sugar (molecular formula C6H12O6). Subsequently, plants release oxygen into the air and store energy (and carbon compounds) in the form of glucose. In consequence, an increase in the photosynthetic rate is directly associated with an increase in both the production of oxygen and glucose. On the other hand, genetically engineered plants can help to reduce hunger in developing countries. In consequence, it is acceptable to develop genetically modified plants as long as contemplating regulatory measures aimed at producing safe products (for example, by avoiding the introduction of genetically engineered genes into wild crop populations).
Introduction : Scientists who study earth's layers are called geologists. Since they cannot see inside the earth, they use geological clues to help them. These clues are gathered from activities such as volcanoes and earthquakes. From these clues , geologists make inferences about what the inside of Earth actually looks like.
Question: Name the main layers of the Earth from the inside to the surface.
Answer:
Inner core, the outer core, the mantle, and the crust.
A corn plant has been genetically engineered. It produces pollen that can make its own toxins. These talks and protect the corn plant against pests. What is the likely impact on the environment around the corn plant?
A. Bird and butterfly populations around the area may increase.
B. The carbon dioxide level would increase in the area.
C. The concentration of pesticides in a nearby lake would increase.
D. Newer strains of pesticide-resistant pests may develop.
A corn plant has been genetically engineered. It produces pollen that can make its own toxins. These talks and protect the corn plant against pests.Newer strains of pesticide-resistant pests may develop. Option D is correct answer.
What are pesticides ?These are the chemicals that kill the pests and these are given to the crops so that they can be saved from pests.
Bird and butterfly populations around the area may increase. It is possible if the flowers and the pollen grains number and the production is increased. The carbon dioxide level would increase in the area. In this situation the plants number gets increased.
The concentration of pesticides in a nearby lake would increase. In this situation the pest use is increased on the plants and in this situation the use of chemicals in the surrounding water resources will be increased.
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**100 POINTS** DNA is an organic molecule that is the code of life. DNA is made up of smaller molecules that form together into two chains. Those chains spiral around each other to form the DNA molecule. Which dichotomous key best describes DNA?
Answer:
Each step is based on genetic traits
Explanation:
so I think u can choose which one it is based on wht i said
I need help on this plzzz
Answer:
they all stay but move 1 and 5 .. 1 goes to 4 and 5 goes to 1
All organisms in the kingdoms Priotista, Plantae, Fungi, and Animalia are
Answer:
Eukaryots.
They have a well defined nucleus and memebrane bound organelles.