Answers
Related Questions
What is the second most abundant element on earth and seems to be very important in biological processes such as oxygen transportation in the body and cellular respiration
Answers
Answer:
iron
Explanation:
Cellular respiration may be defined as the group of metabolic processes as well as reactions which occurs in the cells of the organisms that converts the chemical energy from the oxygen molecules or from nutrients into ATP or adenosine triphosphate and then releases the waste products. Thus it breaks the glucose and produces the ATP. Iron is an important element which are used in many important biological processes in the body like the cellular respiration and oxygen transportation.
which species of protozoan causes the african sleeping sickness?
A . plasmodium vivax
B . entamoeba histolytica
C . balantidium coli
D . trypanosoma brucei gambiense
Answers
The correct answer is D.
this is a protozoan that uses the tse-tse fly as a vector and causes african sleeping sickness. This parasite is usually found in csf
Which of the following is an anthropogenic cause of water pollution?
A. Underwater volcanic activity
B. Riverbank sediment flowing into lakes
C. Farming fertilizers washing into lakes
D. Plate tectonics that cause earthquakes
Answers
Farming fertilizers washing into lakes is an anthropogenic cause of water pollution. Therefore, option (C) is correct.
What is anthropogenic cause of water pollution?According to the theory of anthropogenic climate change, people are primarily responsible for the present climatic shifts via the use of fossil fuels like coal, oil, and natural gas.
There are several sources of water contamination, both natural and man-made. The most frequent anthropogenic sources of water pollution, however, include: Agriculture runoff (which introduces fertilisers, pesticides, insecticides, and herbicides, as well as other pollutants, into bodies of water including lakes, rivers, and ponds). Therefore, option (C) is correct.
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Dihydromyricetin (DHM), a chemical found in the moyeam plant of Asia, has shown the ability to treat certain
cancers.
Which of the following answer choices best describes a possible mechanism of action for this cancer drug?
Choose 1 answer:
А
DHM decreases apoptosis in cancer cells.
DHM decreases apoptosis in normal cells.
DHM promotes apoptosis in cancer cells.
D
DHM promotes apoptosis in normal cells.
Answers
Answer:
(C) DHM promotes apoptosis in cancer cells.
Explanation:
Since some cancers are caused by a lack of apoptosis (programmed cell death), DHM treats cancer by forcing apoptosis to occur in cancer cells, stopping their growth and division.
The choice which best describes a possible mechanism of action for this cancer drug is DHM promotes apoptosis in cancer cells. The correct option is C.
What is Dihydromyricetin (DHM)?DHM is a chemical that is present in the plant, Hovenia Dulcis grow in Japan. It is a raisin plant and has several medicinal values. It is used in East Asia as a hangover medicine.
Apoptosis is a process of cell death, so if DHM promotes apoptosis in the cancerous cells, then it will reduce cancer by killing the cancer cells.
Thus, the correct option is C, DHM promotes apoptosis in cancer cells.
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Help please thank you so much
Answers
Hope it helps :D
During photosynthesis, plants capture light energy and form carbon-containing molecules, such as glucose. Which is not a use for glucose
Answers
Answer:
During photosynthesis, plants capture light energy from the Sun to break weak bonds in reactants, such as carbon dioxide and water, and form carbon containing molecules, such as glucose. The carbon containing molecules can then be used:
✓ to assemble larger molecules, such as DNA, proteins, and fats.
Explanation:
What are two ways that acid rain affects the environment?
Answers
Acid rain can exhibit adverse affects on the environment by leaching aluminium from the soil and by creating nitrogen pollution.
The effects of acid rain:Acid deposition or acid rain is a term, which comprise any kind of precipitation with acidic constituents like nitric acid or sulfuric acid, which fell to the ground from the atmosphere in dry or wet forms.
The ecological effects of acid rain are clearly evident in aquatic environments like lakes, streams, and marshes as it can be harmful to aquatic species and wildlife associated with it. When acid rain flows through the soil it can leach aluminum from the soil, which washes into streams and lakes.
Some kinds of animals and plants are able to withstand acidic waters and some amounts of aluminum. However, some of those which are acid-sensitive will get lost due to decline in pH.
Acid rain also comprise nitrogen, and thus it can result in nitrogen pollution in the coastal waters leading to decline in the populations of shellfish and fish in the regions. Therefore, nitrogen in the acid rain can exhibit deleterious effect on some of the ecosystems.
Thus, acid rain affects the environment by creating nitrogen pollution and by leaching aluminum from the soil components.
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Which of the following is not a structure of the nervous system? A. The brain B. The heart C. The spinal cord D. Cranial nerves
Answers
Answer:
heart
Explanation:
bc i got it right on plato
How are molecules moved across the membrane during active transport? A. They slide through the small spaces in the membrane. B. They are moved using transport proteins and pumps. C. They attach themselves to the membrane and are pulled through
ASAP
Answers
B. They are moved using transport proteins and pumps.
Answer:
B. they are moved using transport protiens and pumps
Explanation:
just took a test on this
are there exits alloted for emergency escape plan? how many?
Answers
Answer:
The correct answer is - yes, multiple exits but a minimum of 2 is a must.
Explanation:
An emergency escape plan is a documented map or plan of a building that is created for the safe evacuation in an emergency such as fire, smoke, natural disaster, or any panic situation.
In an emergency escape plan, there must be easy exits for faster and safe evacuation even in low visibility or smoke condition. Multiple exit routes are allowed to any escape plans, however, two is the minimum number of exits is compulsory.
Yes, there are exits alloted for emergency escape plans. It should be multiple in number but a minimum of 2 must be necessary.
What is an emergency escape plan?An emergency escape plan is the urgent immediate egress or escape of people away from an area that contains an imminent threat of destruction, an ongoing threat, or a hazard to lives or property.
An emergency escape plan provides a path for the people of a particular area to move away from the risky or threatened places immediately. So, emergency exits play a significant role when there is any natural disaster, fire, smoke, etc. has occurred.
Therefore, there are exits alloted for emergency escape plans. It should be multiple in number but a minimum of 2 must be mandatory.
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State, in terms of the number of subatomic particles, one similarity and one difference between the atoms of these isotopes of element X.
Answers
Answer:
The atomic number is determined by the number of protons in the atom.
Neutrons can vary the mass of atoms of the same element; atoms of the same element with the different atomic masses are called isotopes.
Electrons do not contribute a meaningful amount of mass to an atom, and only vary the charge of the atom. A charge atom is an ion.
Explanation:
i hope this is right :)
What is Alzheimer's disease? How does it affect someone?
Answers
Answer:
Alzheimer's disease is a condition that causes dementia. It causes the brain to degenerate and die.
This causes people to decline in their ability to think, socialize, and live independantly.
Answer & Explanation:
Alzheimer's disease is an irreversible, progressive brain disorder that slowly destroys memory and thinking skills and, eventually, the ability to carry out the simplest tasks. It is the most common cause of dementia in older adults. As Alzheimer's disease progresses, people experience greater memory loss and other cognitive difficulties. Problems can include wandering and getting lost, trouble handling money and paying bills, repeating questions, taking longer to complete normal daily tasks, and personality and behavior changes.
What form does the radiation that is used to treat cancer take?
SOS
alpha particles
photons
beta particles
neutrons
Answers
Answer:
Photon radiation
A high-energy photon beam is by far the most common form of radiation used for cancer treatment. It is the same type of radiation that is used in x-ray machines, and comes from a radioactive source such as cobalt, cesium, or a machine called a linear accelerator (linac, for short).
The speed of radioactive particles is also an important factor in medical use. Beta particles travel very fast. This, combined with their small size, gives them significant penetrating power. In cancer treatment, for example, beams of beta particles can be created outside the patient's body and directed at tumors.
Answer:
b
Explanation:
my science teacher gave us this but i’m not sure how to do it
Answers
Which of the following has the greatest effect
on soil's capacity to retain water?
A Soil color
B Soil particle size
C Soil texture
D Soil fragrance
Answers
The water-holding capacity of a soil is the the amount of water that a given soil can hold for plants to utilize
The soil particle size has the greatest effect on soil's capacity to retain water.
Soil particle size and organic matter (the soil's composition) are main determinants of water-holding capacity of a soil. Smaller particles (silt and clay) have a bigger surface area than larger sand particles, allowing the soil to hold more water.Learn more about the water holding capacity of soil: https://brainly.com/question/8464940
Tim has long eyelashes (dominant) and Karen has short eyelashes (recessive). Which statement is true?
O You know Tim's genotype and phenotype.
O You only know Tim & Karen's genotype.
O You know Karen's genotype and phenotype. O You know both Tim & Karen's genotype and phenotype.
Answers
O You know Karen's genotype and phenotype.
because short eyelashes is a recessive gene and that means it's present in two copies
The Chatham Island robin is a small endangered bird found in scrub forests off the coast of New Zealand. The robin is preyed upon by introduced species such as cats and rats. In 1980, the population decreased to only 5 individuals and every individual today is a descendant of a single female. Which of the following is best illustrated in the decline of the Chatham Island robins?
1. Carrying capacity
2. Population bottleneck
3, Population overshoot
4. Type I survivorship
Answers
Answer: 2. Population bottleneck
Explanation:
A Population bottleneck is a term used to refer to an event that causes the population of a species to reduce in very large numbers. Such an event can be environmental disasters like famine, the overhunting of a species or the destruction of its habitat.
In the case of the Cha-tham Island Robin, the bottleneck event must have been the introduction of cats and rats which then went on to hunt the birds to near extinction.
a.
What is the density of a sample of liquid that has a volume of 125mL and a mass of 200 g?
75 g/mL
c. 1.6 g/mL
b. 16 g/mL
d. 0.625 g/mL
Answers
Answer:
C. 1.6
Explanation:
The formula for density is mass/volume, so 200/125 is 1.6g/mL.
A partial DNA sequence for normal hemoglobin and a partial DNA sequence for sickle-cell anemia are shown below. G-G-A-C-T-T-C-T-T Normal hemoglobin G-G-A-C-A-T-C-T-T Sickle-cell anemia Based on the DNA sequences, sickle-cell anemia is caused by A. a sex-linked trait. B. a dominant nucleotide. C. a mutation in the genetic code. D. an incomplete separation of chromosomes.
Answers
Answer:
C. a mutation in the genetic code.
Explanation:
A mutation refers to any change or alteration to the nucleotide sequence of a gene caused by mutagen or mistakes during replication. Depending on the manner of occurrence, mutation can be of different types. In this question, partial DNA sequence for normal hemoglobin is given as: G-G-A-C-T-T-C-T-T while the partial DNA sequence for sickle cell anaemia is given as: G-G-A-C-A-T-C-T-T.
From careful observation of the two two DNA sequences above, it can be realized that a SUBSTITUTION MUTATION from T to A has occurred in the sequence of sickle cell. Note that substitution mutation is the replacement of one base by another in a sequence.
A plant that received external DNA to produce natural insecticides would be an example of a?
Answers
answer: Genetic engineering
Explanation: im just smart
Enzymes can accelerate reactions by:___________.
A) binding a substrate or substrates.
B) promoting the removal or addition of protons.
C) correctly positioning a metal ion for catalysis.
D) lowering the energy for activation.
E) all of the above.
Answers
Answer:
D) lowering the energy for activation.
Explanation:
Just like chemical catalysts that accelerate the rate of chemical reactions, enzymes are biological catalysts that accelerate the rate of biochemical reactions.
Majorly, a catalyst works by lowering the activation energy required for a specific reaction. The lower the activation energy for a reaction, the faster the rate of that particular reaction.
Hence, an enzyme accelerates the rate of reaction by lowering activation energy of the reaction.
Sand blowing against a rock is an example of
erosion
physical weathering
chemical weathering
Answers
Answer:
physical weathering
Explanation:
can someone help me
Answers
since in DNA adenine(A) pairs with thymine(T) and cytosine(C) pairs with guanine(G) the answer is D
The cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for neurons are:_______.
a. dendrite.
b. axon.
c. cell body.
d. neuroglia.
Answers
Answer:
Dendrite
Explanation:
Dendrite with cell body are cytoplasmic projections that are present at the begin of neurons and help increase the cell body surface area through their extensions. The cytoplasm of dendrites and that of cell body have the same number of neurons. Dendrite receive electrical impulses from neurons and send those information to the sons.
Why is it difficult to know the impacts of deep sea mining?
O It has never been tried successfully, so we don't know exactly how it can be done.
Olt is only done in environmentally sensitive areas, where the organisms are being harmed in many ways already, and it is difficult to know the effects of mining.
We know relatively little about deep sea ecosystems, making it harder to assess the impact of mining.
O Most countries have laws against it, so the impacts have not been tested.
Answers
Answer:
I'm pretty sure its...
Explanation:
We know relatively little about deep sea ecosystems, making it harder to assess the impact of mining.
Deep sea mining has never been tried successfully, so we don't know exactly how it can be done so it is difficult to know the impact of deep sea mining.
what is deep sea mining?The process of extracting and often excavating mineral deposits from the deep seafloor is known as deep-sea mining.
The deep bottom spans around two-thirds of the total seafloor and is found at ocean depths greater than 200 meters.
Deep-sea mining has been shown to affect marine biodiversity and ecosystems, but we still lack the knowledge and resources to safeguard them.
There are considerable gaps in our understanding of the deep sea's biodiversity and ecosystems since it is still understudied and poorly understood.
This makes assessing the possible effects of deep-sea mining and putting in place necessary safeguards to protect the marine ecosystem and the three billion people whose livelihoods rely on marine and coastal biodiversity challenging.
Hence , the correct option is A.
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Why is it important to avoid applying too much nitrogen fertilizer?
O A. Too much nitrogen can buffer cells from extremes in pH.
B. Too much nitrogen in surface runoff can poison fish.
C. Too much nitrogen in surface runoff can cause algae to overgrow.
O D. Too much nitrogen can increase the salinity of soil.
Answers
Answer:
too much nitrogen in surface runoff can cause algae to overgrow
Nitrogen fertilizers used in large-scale agriculture could leave a legacy of pollution that would persist for decades in soil and groundwater, scientists in France and Canada warned, which published a study in the National Academy of Sciences magazine, " PNAS ". According to these scientists, the excess of these fertilizers in the environment has been linked to contaminated drinking water and can cause the rapid growth of algae that compromise aquatic ecosystems and coastal marine life.
Explanation:
Brainliest please?
Help please I'll give brainlist
The environment limits population growth by changing birth and death rates. Briefly describe how each environmental factor listed below influences population size. Also, identify each environmental factor as a biotic or abiotic factor
Competitors
Disease
Food
Ph level
Prediction
Soil type
Temperature
Water availability
Answers
Answer:
Soil type
Water availability
Ph level
Competitors
Explanation:
srry if this is not correct im not that smart
Hurry please !
Which of the following explains why gray wolves and killer whales are both in the same class?
O Both gray wolves and killer whales have teeth.
O Both gray wolves and killer whales have live births
O Both gray wolves and killer whales are carnivores
O Both gray wolves and killer whales have lungs.
Answers
Answer:
Both gray wolves and killer whales have live births. And Both gray wolves and killer whales are carnivores
Explanation:
Answer: The correct answer is Both gray wolves and killer whales have live births
Explanation: This answer has been confirmed correct.
Imagine a type of plant that people could eat as food, BUT it was
found to make MORE oil per hectare than microalgae. Would you
recommend using algae OR this new plant for fuel? Why or why not?
(Write at least 3 complete sentences)
Answers
Answer:
Although each of these strategies is being used to produce fuels, they are ... Algae can produce biomass very rapidly, with some species doubling in as few as 6 h, and ... Microalgae have additional advantages over terrestrial plants. ... The terrestrial models use land that is not presently used for food agriculture. One of the fuel sources of the future is algae, small aquatic organisms that convert sunlight into energy and store it in the form of oil. S. ... Algae could potentially produce up to 60 times more oil per acre than land-based plants. ... In the future, anything that runs on gasoline and diesel could also use biofuel from algae.
Explanation:
I need help on this please
Answers
Answer:
A
Explanation: