Answer:The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
Explanation:
Outline the history of epidemic disease in the new world including the carriers and types explain how diseases were spread to the new world
Answer:
Epidemic diseases in the New World started when Cortez went to conquer the Aztecs and the Inca and he ended up spreading disease killing thousands. They were spread by the rise of agriculture and through trade. The carriers of these diseases were bird, humans, and animals. Diseases included syphilis, tuberculosis, flu, and typhoid fever.
Explanation: I got a 100% on Edge.
Sorry I'm late :(
Brainliest Maybe?
HELP ASAP!!!
Type the correct answer in the box. Spell all words correctly.
Which ocean current determines weather changes?
_______circulation occurs due to the difference in the temperatures, densities, and salinities of the waters, and determines
climate changes
Reset
Next
Answer:
water
Explanation:
Which of the following would most likely slow down erosion?
O Plant life
O Groundwater
O Agriculture activity (farming)
O Soil type
Answer:
Agricultural activity
Explanation:
Answer:
I think that plant life would most likely slow down erosion. Plants can limit the impact of mass wasting events such as landslides and other natural hazards.
There are no known motor proteins that move on intermediate filaments (IFs).
What property of intermediate filaments would most likely explain the lack of motor proteins?
a) Tissue specific expression of IFs prevent a single type of motor protein to evolve over time.
b) Lateral bundling of IFs prevent motor movement.
c) IFs do not bind a nucleotide.
d) IFs are less dynamic than microtubules and actin filaments.
e) IFs are unpolarized.
Answer: The correct option is E ( Intermediate filaments are unpolarized).
Explanation:
Intermediate Filaments are usually associated with cells that can withstand mechanical stress which includes claws of animals, hair and makes up the dead remnants of the epidermal cell of the skin. Therefore without the supporting network of intermediate filaments, an epithelium remains intact but the cells are prone to damage by abrasive forces.
Intermediate filaments are so named because they are thicker than actin filaments and thinner than microtubules or muscle myosin filaments
The properties or characteristics of an intermediate filaments that explains the lack of motor proteins is as a result of its subunits which are elongated, not globular and are associated in an anti-polar manner. Therefore, the overall filament has no polarity, and therefore no motor proteins move along intermediate filaments
Describe the effect that increasing the potassium ions initially had on the heart in this activity. Relate this to the resting membrane potential of the cardiac muscle cell. How well did the results compare with your prediction?
Answer:
When there is an increase in potassium within the cell, depolarization is generated
Explanation:
Depolarization is the intracellular increase of potassium in the cardiac cell, this is how the resting potential is reached, this state of the cell refers to the fact that the cell does not execute or transmit any signal, it is in a refractory state of signals, since it does not capture any, this is how it prepares and recovers for future action potential.
The O allele is unusually frequent in the Americas. What does this pattern suggest about the evolutionary history of these populations?
Answer:
Populations from the Americas started from a founding population with a high frequency of the O allele
Explanation:
Human blood type is determined by three different codominant alleles: IA, IB, and, which are named A (IA), B (IB), and O (i). Each person has two blood type alleles, i.e., one allele inherited from the mother and one from the father. The frequency of the O blood allele is very high in indigenous populations, and in Central and South American populations this allele may reach a frequency of 1 (100%). In consequence, the predominance of the O blood allele in Native American populations suggests that these populations descended from a founding population that had a high frequency of the O blood allele. A founder effect may even cause the fixation of one allele within a population, and this phenomenon is known to be associated with the loss of genetic variation.
Alleles are the variant of a gene, which codes for the different traits of an organism. It could be due to mutations or evolutionary adaptations. The presence of the O allele in Americans has a high frequency.
The evolutionary patterns of the Americans suggest that:
The human blood type is coded by A, B, and O alleles. The individual has two alleles, which are inherited from the father and mother. The frequency of the O allele in the allele in the Americans is higher, which can reach up to the frequency of 100%.
The evolutionary pattern suggests that these populations might have descendent from the population having O-blood type. The phenomenon is often explained as the result of the founder effect, which results in the loss of genetic variation.
Thus, the Americans might have descendent from the population having higher frequency for the O alleles.
To know more about evolution, refer to the following link:
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In what ways do compounds differ from elements
Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds.
Explanation:
Hope this helps :)
Which of the following contributes to the growth of a population
Answer:
B
Explanation:
I think is B
Note: ...Make me brainliest Please!..
How is the carbon-14 made
Answer:
by the interaction of neutrons with nitrogen 14.
Explanation:
Carbon 14 is continuely made by the interaction of neutrons with nitrogen 14 in the earths atomsphere; the neutrons required for this reaction are produced by cosmic rays interacting with the earths atmosphere.
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Leukopenia is a condition characterized by a decrease in white blood cells. What effect does leukopenia have on the body's ability to fight infection?
Leukopenia increases the body's ability to fight infection.
Leukopenia decreases the body's ability to fight infection.
Leukopenia has no effect on the body's ability to fight infection.
Leukopenia increases the body's ability to fight infection at certain times and decreases it at other times.
Answer:
Leukopenia decreases the body ability to fight infection
Explanation:
There are three major types of cells in the blood namely: platelets, red blood cells (erythrocytes) and white blood cells (leucocytes). These cells perform individual functions in the blood tissue, however, the cell saddled with the responsibility of fighting against foreign bodies and preventing the body against infection is the WHITE BLOOD CELL (LEUCOCYTES).
According to this question, Leukopenia is a condition characterized by a decrease in the number of white blood cells in the blood. The effect of this decrease in number of white blood cells caused by Leukopenia is a DECREASE IN THE BODY ABILITY TO FIGHT INFECTION.
Answer:
b
Explanation:
HELP ME PLEASE!!!!!!!!!!
What happens to a rock formation that undergoes a repeated and frequent freeze and thaw cycle of water?
A: Sinkholes form which is part of the chemical weathering process.
B: Deposition occurs which is part of the chemical weathering process.
C: Abrasion occurs which is part of the mechanical weathering process.
D: Ice wedging occurs which is a part of the mechanical weathering process.
Answer:
its A (Sinkholes form Which is a part of the Chemical weathering process)
Explanation:
How do I know you may ask well I've done the test yesterday and that's what I picked and I got it right:)
Weathering is a process of disintegration of the rock by atmospheric exposure. Repeated and frequent freeze and thaw cycles of water cause ice wedging. Thus, option D is correct.
What is mechanical weathering?Weathering can be physical, mechanical, or chemical. Mechanical weathering involves the erosion or the disintegration of the parent larger rocks into smaller sediments of the small rocks. It involves either solidified or liquid water as a key agent to deteriorate the rock.
Ice wedging is a mechanical weathering that involves seeping and falling of the cold water or precipitation over an area that repetitively and frequently gets frozen and thawed over and again.
This water gets deposited and causes wedges to form in the parent rock. The cracks are formed that erode and disintegrate the rocks into smaller pieces.
Therefore, option D. ice wedge is formed by mechanical weathering.
Learn more about mechanical weathering, here:
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If coal is not a 21st century fuel, then what is?
Answer:
Hydrogen
Explanation:
We may start using hydrogen as the newest type of fuel due to its cleanliness.
Hope this helped you out today! :)
What role did Marco Polo serve in the Mongol Empire?
Marco Polo provided military tactics to Genghis Khan.
sm
Marco Polo worked as an adminisator for 17 years.
Marco Polo ran one of the khanates in the region.
Marco Polo wrote a book about Kublai Khan,
Answer:
Marco polo worked as an administrator for 17 years.
Explanation:
Upon reaching China, Marco Polo entered the court of powerful Mongol ruler Kublai Khan, who dispatched him on trips to help administer the realm. Marco Polo remained abroad for 24 years
Answer:
b
Explanation:
Sperm and egg need _______ the normal number of chromosomes.
Answer:
Stabalize
Explanation:
Answer:
Haploid
Explanation:
From each parent In humans, cells other than human sex cells, are diploid and 23 pairs of chromosomes. Human sex cells (egg and sperm cells) contain a single set of chromosomes and are known as haploid.
Hi! I’m on a test and I have to submit it in about 25 minutes. Please help!
Which of these cannot be grown for biofuel?
Sawgrass
Corn
Soybeans
Rock salt crystals
Answer:
Rock Salt crystals
Explanation:
Which of the following is the reason fossil fuels are used so much?
OA) They release a large amount of energy when burned.
OB) They are renewable resources.
C) They are good for the environment.
D) They are easy to obtain. Please help
Answer:Additionally, the methods used to access these fuel sources (think fracking, ... For this reason fossil fuels are incredibly “energy dense“, meaning a little bit of a ... to abandon is the fact that they have been the main source energy in much of the
Explanation:
ASAP I NEED IT LIKE RN
The final stage of the cell cycle is called
Group of answer choices
telophase
metaphase
cytokinesis
anaphase
Answer:
its C
Explanation:
The energy in food molecules, such as glucose, is converted into__
Answer:
ATP
Explanation:
Which best describes ecosystem homeostasis?
a. Ecosystem homeostasis is an ecosystem in equilibrium is said to be in a relatively stable state. The
populations of various animals in the ecosystem are generally staying within a similar range.
b. Ecosystem homeostasis is an ecosystem in which the keystone species has the greatest population.
These keystone populations are not able to regulate other species populations.
c. Ecosystem homeostasis is an ecosystem that has populations that change dramatically over time. The
species within the ecosystem are constantly struggling to maintain a high population.
d. All of the above.
Answer:
Individual organisms respond to stimuli to maintain homeostasis. Similarly, populations of organisms respond to external factors for a collective benefit. All populations must have an adequate amount of food, water, shelter, and space. ... Biotic factors like predation and competition for food are also limiting factors
Answer:
#CarryOnLearning
someone already answered your quest correctly so I hope you dont mind me in here :P
What is the texture of an igneous rock formed from magma that cooled slowly deep underground?
A. nonvesicular and coarse
B. nonvesicular and glassy
C. vesicular and fine
D. vesicular and very coarse
Answer:
Phaneritic (phaner = visible) textures are typical of intrusive igneous rocks, these rocks crystallized slowly below Earth's surface. As magma cools slowly the minerals have time to grow and form large crystals.
Explanation:
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The texture of an igneous rock formed from magma that cooled slowly deep underground nonvesicular and coarse.
What is an Igneous Rock ?Igneous rock is a type of rock which is formed when molten magma or Lava cools down an solidify.
This molten Magma or Lava usually erupts from the earth's crust before cooling and solidifying.
Other forms or rocks are the sedimentary rock and the metamorphic rock.
When Igneous rocks form, its texture is usually nonvesicular and coarse.
Learn more about Igneous Rock at https://brainly.com/question/20538428
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what is a natural depression filled with standing freshwater called giving brainliest
Answer:
B:A Pond
Explanation:
Brainliest PLZZZ
a pure substance is just one element, or one or elements that is bonded to another. Which of these is NOT a pure substance
gold- it's an element
oxygen-it's an element
carbon dioxide -it's a compound
koolaid- it's dissolved
Answer:
Sorry for the late answer, I got carried away.
Koolaid is the substance that is not pure.
Explanation:
Koolaid contains water, sugar & coloring, but is not a pure substance because each of the ingredients can differ each time it is made. it is the same throughout and can be separated, therefore it is also a homogeneous mixture.
A raccoon consumes 500 calories of food. 50 of those calories are converted to biomass. In other words ...
Answer:
10 % of the energy (i.e., 50 calories) is converted to biomass. This efficiency of energy transformation is high
Explanation:
Which of the following statements is true?
OA. All changes made by organisms to their environments are beneficial.
B. All organisms cause changes in their environments.
OC. All changes made by organisms to their environments are detrimental.
OD
all of these
Answer:
The correct answer would be D :)
Explanation:
Answer:
B. All organisms cause changes in their environments.
Explanation:
I got it from study island lol
3
Drag each tile to the correct location on the chart.
A population of raccoons lives in a forested area with lots of trees. The raccoons eat insects, eggs, berries, nuts, and small animals such as
rodents and frogs. One of the main predators of the raccoons are coyotes, which also prey on rabbits.
Identify whether the changes to the ecosystem are more likely to increase or decrease the population of raccoons.
Large parts of the forest
are cut down for wood.
Pollution from a nearby farm
decreases the population
of insects in the forest.
Additional rain increases
the population of plants
in the forest
More permits to hunt
coyotes are approved.
A disease decreases
the population of rabbits
in the forest.
Frogs in a pond near
the forest experience
a population surge.
Increases Population
Decreases Population
Answer:
Explanation:
A
What are economic importance of crayfish
How has human activity, such as deforestation and reliance on fossil fuel, augmented the greenhouse effect and contributed to global warming?
Answer:
They lead to increased levels of carbon dioxide and other greenhouse gases in the atmosphere which causes the greenhouse effect.
Explanation:
Answer:
primary cause of human-created carbon emissions - burning fossil fuels
destroys natural carbon sinks, leading to more co2 in the air - deforestation
emits methane from decomposing matter - waste disposal in landfills
Explanation:
Plato
How do organisms X, Y and Z move?
Explanation:
three new organisms ,x,y and z were discovered by a group of zoologists they observed that organisms x and y depend on organisms z for food . organisms z does not depend on oraganisms for food . oraganisms x is the . only one that can move on its own
is oxygen man made or natural
Answer:
Natural
Explanation:
It appears naturally such as in our atmosphere.
Chloroplasts in plant cells carry out the process of cell respiration.
O True
O False
