this is true, but where is the problem? or do i just not see it?
A scientist claims that he has protected animal test subjects from a newly mutated virus using an experimental vaccine. The experimental vaccine was injected into five animal test subjects. The scientist also injected a placebo vaccine into five other animal test subjects. One month later, all of the test subjects were exposed to the mutated virus. The subjects that received the vaccination showed no sign of the disease and blood tests confirmed the presence of antibodies against the disease, but the subjects given the placebo developed symptoms of this condition. Why did one group have a placebo injected before being exposed to the virus? Choose 1 answer: Choose 1 answer: (Choice A) A They were part of the control group (Choice B) B They would be exposed to a weakened form of the virus (Choice C) C They would be protected from the disease (Choice D) D They were part of the experimental group
Answer:
A. They were part of the control group
Explanation:
In a scientific experiment, the CONTROL GROUP as opposed to the experimental group is the group that does not receive the experimental treatment. This acts as a standard for comparison.
In this question, the EXPERIMENTAL VACCINE is the experimental treatment or independent variable that was added. The five animal test subjects that was injected with this vaccine are called the EXPERIMENTAL GROUP while the other five test subjects that were rather injected with a PLACEBO are called CONTROL GROUPS.
Wolves are predators of deer. What is most likely to happen to the deer population if the wolf population increased? 0 stay the same increase decrease Obecome extinct
Since wolves are indeed the main predator of deer, if wolves were to increase in their population, the population of the deer will inevitably decrease dramatically.
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If the wolf population were to increase, it is most likely that the deer population would decrease.
What is predator?A predator is an organism that hunts and consumes another (the prey). This is known as predation.
Predators, in general, share the following characteristics: They are usually larger than their prey or, like ants, overwhelm them by attacking in large numbers.
If the wolf population increases, the deer population will most likely decrease.
This is because wolves are deer predators, and an increase in the number of wolves means more deer will be hunted and killed by wolves.
The deer population is unlikely to become extinct as a result of an increase in the wolf population because other factors such as disease, habitat loss, or human hunting can also have an impact on the deer population.
Thus, the population will decrease.
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mass extinction definition
Answer:
The extinction of a large number of species within a relatively short period of geological time, thought to be due to factors such as a catastrophic global event or widespread environmental change that occurs too rapidly for most species to adapt.
Explanation:
Hope this is helpful.
Which of the following is a true statement regarding phytoplankton?
they are most commonly found near deep-sea thermal vents
they are responsible for 80% of all global warming
they are the only cause of green ocean water
they are the primary photosynthetic plants in the ocean
Answer:
(D) I think
Explanation:
can anyone tell me hypothesis for eye disease...
Answer:
Mostly radiations or dangerous products that come in contact with the eye For example, maybe harmful makeup product but there are many reasons for eye disease, you should elaborate more on dangerous product put on skin and harmful chemical
Explanation:
The pathophysiology of primary open-angle glaucoma is still largely unknown, although a joint contribution of vascular, biomechanical, and biochemical factors is widely acknowledged. Since glaucoma is a leading cause of irreversible blindness worldwide, exploring its underlying pathophysiological mechanisms is extremely important and challenging. Evidence from recent studies appears supportive of the hypothesis that a “glymphatic system” exists in the eye and optic nerve, analogous to the described “glymphatic system” in the brain. As discussed in the present paper, elucidation of a glymphatic clearance pathway in the eye could provide a new unifying hypothesis of glaucoma that can incorporate many aspects of the vascular, biomechanical, and biochemical theories of the disease. It should be stressed, however, that the few research data currently available cannot be considered as proof of the existence of an “ocular glymphatic system” and that much more studies are needed to validate this possibility. Even though nothing conclusive can yet be said, the recent reports suggesting a paravascular transport system in the eye and optic nerve are encouraging and, if confirmed, may offer new perspectives for the development of novel diagnostic and therapeutic strategies for this devastating disorder.
What are fossil fuels? Why do you think they are used if they cause climate change?
Answer:
fossil fuels are natural fuels like coal.
When fossil fuels are burnt they release large amounts of carbon dioxide ( a greenhouse gas ) that traps heat in our atmosphere causing global warming which is also a factor of climate change
Explanation:
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En cuáles de estos Cuerpos hay Células? Corcho, botella de plástico, pera, roca, sangre, vaso de agua.
the table lists the solutions added to the oil and water mixture
Answer:The table lists the solutions added to the oil and water mixture. Complete the ... The small intestine contains many structures that absorb glucose. Name this ...
Explanation:
oxygen transport in humans involves the bonding of oxygen with
A : white blood cells
b :platelets
C :Hormones
D Hemoglobin molecules
Answer:
i think it's d. hemoglobin molecules
Oxygen transport in humans involves the bonding of oxygen with hemoglobin molecules. Therefore, option (D) is correct.
Human oxygen transport is essential for delivering oxygen, a key gas needed for cellular respiration, to all tissues and organs. Haemoglobin molecules in red blood cells deliver oxygen.
Oxygen diffuses into the bloodstream and meets haemoglobin in the lungs. Oxyhemoglobin is formed when haemoglobin binds to oxygen molecules. Oxygen partial pressure and other factors affect reversible binding.
The heart pumps oxygenated blood via the circulatory system to tissues and organs. Oxyhemoglobin releases its oxygen, allowing cells to use it in cellular respiration to make energy. The mechanism efficiently supplies oxygen for metabolic needs. Life and physiological activities depend on this mechanism. Therefore, option (D) is correct.
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Which of the following biological outcomes is not a result of mitosis? *
Maintenance of genetic composition
Introduction of genetic variation
Repair of skin wounds
Growth of organs
Answer:
Metabolism
ayan ang sagot pri..
A principle that states in a sequence of undisturbed rocks, the oldest rocks are on the bottom
and the rocks become progressively younger toward the top
Choose from these answer:
(Superposition)
(Uniformity)
(Fault)
(Overfolding)
super position
Explanation:
because because it is arranged in a sequence
A pack of Ramboulet sheep were imported from Australia to Pakistan in November. After some days, various sheep were suddenly died. Remaining of them were carefully examined by an expert veterinarian who found that sheep were extremely weak with yellowish mucus membrane. Sheep were gasping and it was examined that some of them are anxiously looking at their belly. He prescribed some emergency drugs along with fecal examination. Results showed presence of large quantity of parasite oocytes approximately ranging from 145 -155 um in length and 85-95um in width. How will you proceed with diagnosis as veterinarian? What is differential diagnosis and lifecycle of parasite?
Answer:
Through medication.
Explanation:
First I will apply medication that kills the pathogen that is present in the feces as well as good feel to maintain the health of sheep which was weak due to the pathogens. I have to apply vaccines that kills oocyst that is responsible for this infection. A differential diagnosis refers to a list of possible conditions or diseases that could be causing your symptoms. It can be obtained from your symptoms, medical history, laboratory results, and a physical examination. We can find out the disease through the symptoms that we observe from physical examination.
Mention any four characteristics of warm blooded animals
Answer:
They maintain their body temperature higher than their environment by some metabolic processes like contraction of muscles, friction produced by flow of blood etc. They have a higher basal metabolic rate, and also a greater capacity to increase their metabolic rate.
Which of the following options is true for aerobic and anaerobic respiration? * The answer is between C and D
Answer:
C
Explanation:
Can I get Brainliest? plz?
Answer:
C is the correct answer.
Explanation:
This is because aerobic does in fact release large amounts of energy as opposed to anaerobic, which releases very small amounts of energy. It isn't D because in anaerobic, the products are organic AND inorganic.
Please help I’ll give brainliest
Answer:
53
Explanation: You do 36 + 17 = 53 neutrons
Answer: The answer is 19
What is the function of the organelles that are labeled F?
The organelle labeled 'F' in the given diagram is Endoplasmic reticulum. The main function ER is to move proteins and other substances through the
What environmental factor was important for the
Cambrian "explosion of life”?
Answer: the earth was just starting to develop really well and well enough for life.
Explanation: atmospheric oxygen and oceanic calcium levels went up, but nobody needs to know that much facts about how earth developed, But the group called phyla started growing because of these conditions
Answer:
Explanation:
Tôi nghĩ rằng nếu quan trọng thời điểm đó phải là hình thành tầng ozon tạo tiền đề thiết lập hệ sinh thái
Select all the correct answers.
.
Which three statements provide reasons that scientists are considering renewable sources of energy?
re...
Most renewable resources are clean and nonpolluting.
Renewable resources can be replenished.
ооооо
O Renewable sources are conventional resources.
Most renewable resources are easily available in nature.
All renewable resources are cost effective.
Reset
Reset
Next
Answer:
C&D
Explanation:
I JUST DID THE TEST
The three statements which provide reasons that scientists are considering renewable sources of energy are as follows:
Most renewable resources are clean and nonpolluting.Renewable resources can be replenished.Most renewable resources are easily available in nature.Thus, the correct options are A, B, and C.
What are Renewable sources of energy?Energy sources that are renewable are defined as those that miraculously come from natural sources and are replenished or recharged more quickly than they are actually consumed.
These energy sources are based on the idea of sources which are continuously replenished more quickly. Most of the time, this energy is produced in a clean, non-polluting manner. Since renewable energy comes from natural resources, it is substantially cheaper or free to get renewable energy in nature.
Therefore, the correct options are A, B, and C.
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Depletion of nonrenewable resources is often a result of?
strenuous exercise leads to muscle cramp give reason
Explanation:
Cramps can have causes that aren't due to underlying disease. Examples include dehydration, strenuous exercise or lack of muscle use.
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Answer: Lactic acid
Explanation: The acid is caused by anaerobic respiration, which you do when you do not get enough oxygen
The products of cellular respiration are
Answer:
ATP, carbon dioxide, and water.
Explanation:
ATP, carbon dioxide, and water are all products of this process because they are what is created.
A slab of bare rock is covered with lichens. In time, mosses cover the rock, followed by grasses, and finally by small shrubs and tree saplings. In this example, the lichens represent
a. pioneer organisms
b. secondary consumers
c. a climax community
d. a dominant species
Answer: pioneer organisms
Explanation: they were present as the environment developed
In 2011 and 2012, scientists working on the Banana River in Florida recorded a dramatic increase in the number of manatee deaths. Over the past 50 years, this area has also seen the human population increase by more than 500,000 people. It is believed that pollution from numerous sewage tanks leaked into the water, eliminating the manatees' food source, replacing it with an alga that is toxic to the manatee. This is an example of A) a natural cycle in an ecosystem B) the effect of increased biodiversity on an ecosystem C) human actions altering ecosystems with serious consequences D) direct harvesting in an ecosystem
Answer:
C) human actions altering ecosystems with serious consequences
Explanation:
The increase in the manatee´s death during 2011-2012 might be directly related to human actions.
The increase in the number of people during the last 50 years to more than 500,000 individuals, and probably the lack of policies and regulation, lead to an enhance in water pollution by sewage tank leaks.
Pollution probably caused a gradual decrease in the manatee´s principal source of food, which also caused an increase in the toxic algae population.
Algae caused the death of manatees as a consequence of human action that altered the natural ecosystem by polluting water.
Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. Some biologists urge the collection of the few remaining individuals of some of the most threatened amphibian species, to preserve them if they become extinct in the wild. If such captive breeding programs could produce thousands of individuals from just a few of the remaining survivors, the species will still be threatened because of ______.
Answer:
a bottleneck effect
Explanation:
Genetic drift refers to the change in the allele frequencies in a population due to chance (random) events. The bottleneck effect, also known as population bottleneck, can be defined as a severe case of genetic drift caused by a drastic reduction in the population size. The bottleneck effect is well known to cause the loss of important genetic variation since alleles that were present in the original population are lost, thereby limiting its genetic diversity. One of the most common causes that may lead to a population bottleneck in a natural population is environmental disasters (e.g., earthquakes, floods, etc).
What are the by products of Light Reaction ?
Answer:
There are two end products of the light reaction of photosynthesis, ATP and NADPH. These molecules are produced during the cyclic and the non-cyclic photophosphorylation reactions.
The radiometer is designed to be placed in a sunny window and as the sun's rays strike the blades, they spin. Which kind of energy powers this device?
Answer:
Solar energy.
Explanation:
Solar energy is the kind of energy that powers the devices when the solar radiations strike on the blades of the radiometer. The device has the ability to change or convert solar energy into mechanical energy. Solar radiation is a natural resource from which clean energy can be formed that can be used for different activities in our daily life. There are certain cells that are present on the body of radiometer that produces energy needed for its running.
Where does the exchange of oxygen (from the air) with carbon dioxide (from the cells) take place?
A. Where are the bronchi meet the bronchioles
B. Where the blood meets the cells
C. Where the nasal passages meet the air
D. Where are the alveoli meet capillaries
Answer:
The Answer is Option D.
Exchange of respiratory gases, oxygen and carbon dioxide take place in the alveoli of the lungs. Oxygen which is inhaled from the atmosphere diffuses through the walls of the alveoli and reaches to the adjacent capillaries into the red blood cells.
Answer:
D. Where are the alveoli meet capillaries
Transpiration is evaporation from plants.
TrueFalse
Answer:
true
Explanation:
it's the output of plant leaves
What are water and carbon dioxide in the cellular respiration reaction?
CU
They are reactants because they are present before the reaction.
They are reactants because they are present after the reaction.
They are products because they are present before the reaction
They are products because they are present after the reaction
Save and Exit
Answer:
They are products because they are present after the reaction.
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can dna replication occur without proteins
