In the 1520s, the Spanish explorer Cortes and his armies carried the virus that causes smallpox to NorthAmerica and South America.
The graphs above illustrate the death rate among both Europeans and American Indians from smallpox at that time. Which of the following statements best explains the difference in death rates?
F. People in Europe were healthier than American Indians.
G. Antibiotics were available in Europe but not in North America.
H. American Indians had never been exposed to the smallpox virus, so resistant individuals had not yet become common.
J. American Indians were exposed to a virus that was different from the virus for smallpox in Europe.
Answer:
I can't see the graph but I believe that the answer is H
Water that is trapped within the Earth is called
Answer:
ringwoodite
Explanation:
smarty
Answer:
I think, its ringwoodite
In a chemical bond between two or more atoms, what creates the bond?
A. Proton pairs
B. Electron pairs
C. Diametric energy force
D. The nucleus
Answer:
I think C diameteic energy may be right ans\
Describe how genes, chromosomes, proteins, mutations, and mutagens are related to each other. PLZ HELP ME!!!!!!!
Answer:
DNA
Explanation:
All these events occur with the golgi apparatus and endoplasmic reticulum. All these terms have to do with genetic coding and how that genetic coding sends directions to the organelles inside the cell.
define the term area opaca and area pellucide
Answer:
Explanatiothe peripheral opaque area that surrounds the area pellucida of a vertebrate embryo (as of a bird) formed by discoidal cleavage.
How does the body protect itself from the majority of pathogens it encounters?
Answer:
In general, your body fights disease by keeping things out of your body that are foreign. Your primary defense against pathogenic germs are physical barriers like your skin. You also produce pathogen-destroying chemicals, like lysozyme, found on parts of your body without skin, including your tears and mucus membranes. In response to infection, your immune system springs into action. White blood cells, antibodies, and other mechanisms go to work to rid your body of the foreign invader. The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins.
Once infected cells have sensed an invading pathogen, they secrete molecules called cytokines and chemokines. These cells are then primed to resist an infection with the invading virus. Cytokines such as interferons activate anti-viral genes in the infected and neighbouring cells.
Microorganisms capable of causing disease—or pathogens—usually enter our bodies through the eyes, mouth, nose, or urogenital openings, or through wounds or bites that breach the skin barrier. Organisms can spread, or be transmitted, by several routes.
The second line of defense is nonspecific resistance that destroys invaders in a generalized way without targeting specific individuals: Phagocytic cells ingest and destroy all microbes that pass into body tissues. For example macrophages are cells derived from monocytes (a type of white blood cell).
If pathogens do manage to enter the body, the body's second line of defense attacks them. The second line of defense includes inflammation, phagocytosis, and fever.
Answer:
your skin protects itself because of all the oils on your glands .. but when you get a cut the while blood cells trap and eat them
Explanation:
Cell specialization is important during the growth and development of a multicellular organism. This process is most directly regulated by _____________.
Answer:
atp
Explanation:
If the color differences were less distinct (ex. all butterflies were only shades of reds and oranges), would you expect similar results? Explain what you would expect and why.
Answer:
If the color differences were less distinct (ex. all butterflies were only shades of reds and oranges), would you expect similar results? ... That the predator has the ability to associate the prey to the sickness, and that the predator can distinguish the color difference.
Explanation:
The predator has the ability to associate the prey to the sickness, and that the predator can distinguish the color difference.
What the Viceroy's color pattern evolved?The Viceroy's color pattern has been evolved because the natural selection favoured them. The viceroy butterfly camouflage as the monarch butterfly as well as the exhibit Mullerian mimicry where as these two toxic species has the mimic each other for their benefit and by time natural selection has been favoured these.
Natural selection has been the process by which the reproductively fitest has the populations of the living organisms survive, adapt and change. The viceroy butterfly has the brush-footed butterfly having the dark orange colour with the black veins and row of the white spots on the border of its wings.
Monarch butterfly has the same as that of the viceroy except that it has the black horizontal stripes that has cross the bottom of its back wings. Species has refers to the group of the organisms which have the similar features and which are able to be interbreed to produce the viable and the fertile offspring.
Therefore, reproductive isolation prevents interbreeding between members of different species. It includes a collection of behavioral, evolutionary, and physiological processes.
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Please help meeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
1.) The two gametes found in humans are the sperm and the ova.
2.) Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).
3.) Because the alleles that the mother and the father carry are mixed together in the offspring.
4.) Because it only introduces genetic variation into the population if a random mutation in the organism's DNA is passed on to the offspring.
Please this is all I can answer
DIRECTIONS: Indicate whether each statement is TRUE (T) or FALSE (F):
1. _____ Carbon dioxide (CO2) is a greenhouse gas
2. _____ Methane is a greenhouse gas
3. ______ As icebergs melt, they cool off the earth, slowing climate change
4. ______ Ocean pollution from trash and oil spills is making climate change worse
5. ______ Factories that burn coal to produce electricity emit (give off) CO2
6. ______ Our increased appetite for meat has increased climate change
7. ______ Climate change can happen naturally, without human activity
8. ______ Wind, solar, and hydroelectric power do not cause climate change
9. ______ Alternative forms of energy tend to be more expensive than burning fossil fuels
Please do not use an answer that doesn't make sense! I put 25 points because this is a long question
Answer:None PLEASE MAKE MORE SENSE MY GOSH
Explanation:NONE
Carbon dioxide (CO2) is a greenhouse gas. It is true
Methane is a greenhouse gas. It is true.
As icebergs melt, they cool off the earth, slowing climate change. It is true.
Ocean pollution from trash and oil spills is making climate change worse.It is true.
Factories that burn coal to produce electricity emit (give off) CO2. It is true.
Our increased appetite for meat has increased climate change. It is true.
Climate change can happen naturally, without human activity. It is false.
Wind, solar, and hydroelectric power do not cause climate change. It is false.
Alternative forms of energy tend to be more expensive than burning fossil fuels. It is true.
What is fossil fuel?
Fossil fuels has been result of the biological processes as heat and pressure from the Earth's crust that decomposed these organisms into one of the three main kinds of fuel and these are oil which is also called petroleum, natural gas, or coal.
The origin of the fossil fuels has the anaerobic decomposition of the buried lifeless organisms, that containing natural molecules is created through photosynthesis. The conversion from those materials to excessive-carbon fossil fuels commonly require a geological method of millions of years.
Biological methods are defined as the processes that are very crucial for an organism to live, as well as that shape its capacities for interacting with its surroundings. The organic processes has been made of many chemical reactions or the different events that use to concerned within the persistence as well as the transformation of lifestyles forms.
Therefore, Biological approaches either aerobic or the anaerobic which is based upon the environmental necessities of the microbial consortia.
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If RNA strand reads AUG CGU AAU UAU, what did its source DNA read?
Answer:
TAC GCA TTA ATA
and apparently my answer needs to be 20 charcters long
Which action is harmful to organisms living in water ecosystems
____is a teratogen
BPA
Formaldehyde
Ultraviolet radiation
Alcohol
Answer:
Alcohol is a treatogen.
Certain chemicals, social drugs and some medicine are also some examples of treatogen.
What is the source of the carbon dioxide that is used in photosynthesis?
A. sunlight
B. the soil
C. the atmosphere
D. the plant
Answer:
A
Explanation:
Sunlight provides the energy needed for photosynthesis to take place.
what’s the chemical reaction for the digestion of fats.
Answer: The chemical reaction for the digestion of fats is when A triester is produced through the chemical reaction of three fatty acid molecules with glycerol, a molecule that contains three hydroxyl groups. When fats are broken down these fatty acid chains and glycerol are free for the body to use.
Explanation:
Lipids (fats and oils)
Lipase enzymes break down fat into fatty acids and glycerol. Digestion of fat in the small intestine is helped by bile, made in the liver. Bile breaks the fat into small droplets that are easier for the lipase enzymes to work on. Bile is not an enzyme.
List the cell organelles involved in energy generation for the cell.
Answer:
Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.
The cohesion-tension theory proposes that the physical properties of water allow the rise of water through a plant. Sketch and describe cohesion and adhesion of water molecules. Don't do the sketch part only do just the description part.
Answer:
Cohesion: the attraction force between the same type of molecules.
Adhesion: the attraction force between different types of molecules.
Amino acid is to protein as
nucleotide is to nucleic acid
fat is to lipid.
DNA is to RNA.
sugar is to fat
Describe the movement of water if cells are in a hypertonic solution, hypotonic solution, and isotonic solution.
Why?
a farmer sprays his crops once a week with pesticides to kill beetles. he noticed that the pesticide he used last year is not killing the beetles this year . the beetles have evolved which strategies would best way to stop the evolution of pesticide resistant beetles?
What is a Metamorphic Rock?
rock that forms when existing rock changes to a new rock because of heat and pressure
⊝
rock that forms by the process of compaction and cementation of sediments
⊝
rock that forms when melted rock (magma, lava) cools and hardens
⊝
pls help
Answer: A) rock that forms when existing rock changes to a new rock because of heat and pressure ..hope this helped!
Explanation:
list the types of infectious agents that may infect the human body
A. fungi, hookworms sore throats bugs
B. immune system diseases viruses fungi
C. infection sickness bacteria attackers
D. viruses bacteria, fungi, and parasites
Answer:
either a or d
Explanation:
ITS A my bad hope it works
Which is not a characteristic of a Prokaryote?
A) Simple
B) Has a nucleus
C) Replicates via cloning
D) Always single cell
Answer:A
Explanation:
which principle did you apply in step 2 in the Investigation
Answer:
Do not pre-judge
Investigation must be trained and experience will be applied in step 2 in the Investigation.
What are the steps of investigation ?Scientific investigation is a continuous process of investigation which involve different steps to get the answer of a question by using scientific method.
The basic steps includes Investigators must be as independent, must be trained and experienced, all relevant issues must be identified, sufficiently resourced.
All relevant physical and digital evidence must be identified, collected , stored and examined during experiment, documentation must be secured and reviewed, witnesses must be identified.
The analysis of all the results must be gathered during the investigation must be objective oriented and based solely on the facts.
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Important vocabulary continued: what is the difference between a unicellular organism and a multicellular organism?
Answer:
unicellular is a organism that is only one cell. most of the time they are your bacteria and viruses. while a multicellular organism is a organism with many cells. can be anything from something you cant to to plants and animals that you can see
Explanation:
Canals such as the one shown in the image are artificial waterways built to allow the
movement of large ships that cannot travel along shallower, natural waterways.
Which of these is an advantage that a system of canals might bring to a city?
Answer:
b
Explanation:
Is glucose more or less complex than the rest of the biomolecules? Explain.
Answer:
Less complex.
Explanation:
Glucose is both a monomer and simple sugar.
Glucose is a monosaccharide. It is a biomolecule. It is less complex than the rest of the biomolecules, such as proteins, lipids, and other complex carbohydrates like glycogen.
What is a biomolecule?
Biomolecules are present inside the cell. Carbohydrates, proteins, and lipids are some examples of biomolecules. Carbohydrates are divided into monosaccharides, disaccharides, and polysaccharides.
A monosaccharide has a single unit. Examples are glucose, fructose, etc. A disaccharide consists of two units. An example is maltose. Maltose is made up of two units of glucose connected by a glycosidic bond. An example of a polysaccharide is glycogen. Multiple sugar units are connected by glycosidic bonds to form glycogen. It is a storage product.
Carbohydrates are present on our cell surface as peptidoglycan. Protein is a biomolecule that is made up of amino acid monomers. They make the different structures of a cell, such as actin fibers, etc. Lipid is made up of hydrogen and carbon. Examples are cholesterol, phospholipids, etc.
Hence, in comparison to all other biomolecules, glucose is the simplest.
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Scientific laws attempt to explain nature...
true or false
how does the nitrogen cycle start from nitrites and end with nitrates? (full answer)
Explanation:
The nitrogen cycle seems to be the nitrogen form of recycling, that requires fixing of nitrogen, Teodoro mamoncillo, nitrogen removal, and deionization. The mechanism whereby the nitrogen and nitrites are subsequently converted to nitrogen fixation is denitrification.
Which mechanism of transport takes place without expending cellular energy?
Active
Hypotonic
Isotonic
Passive
Answer:
c
Explanation: