Answer: (A)
Explanation:
An infectious disease is a disease that is caused by the invasion of a host by agents. Some pathogens then spread between host cells or inside of body fluids, while harm (damage) is usually due to the production of toxins or devastating enzymes.
Which of the following is NOT likely to become a fossil?
A. a footprint in a rock
B. A price of bone buried in sand
C. A piece of cement
D. A preserved tooth
Answer:
The first one is right, its B
Explanation:
Yes the footprint may be in the rock for that moment but many things can happen to the rock. It can freeze and go through changes, or the footprint could cause it to break apart.
Therefore the answer is A
Answer:
B
Explanation:
for something to become a fossil, it needs to be safe from water or air otherwise it will decompose, weather, or erode away.
for A the footprint is a solidified impression, and it is safe from the elements
C will not go away since it will not blow and is not very susceptible to the elements
D has preserved in the name, that means it safe.
for B water and air can get to it. making it susceptible
I hope this helps u
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How are hookworms transmitted?
A.by ticks and fleas
B. by contaminated water
C.by air dispersal
D. by skin contact
E. by mosquitoes
Final answer:
Hookworms are transmitted to humans through skin contact with soil contaminated by feces of infected animals, making the correct answer D. by skin contact.
Explanation:
Hookworms are transmitted primarily through skin contact with soil that is contaminated by infected dog or cat feces. The larvae present in contaminated soil can penetrate the skin of a human host. This can often occur through bare feet, which is why wearing shoes in areas where hookworms may be present is an important preventative measure. This kind of transmission allows the larvae to enter the bloodstream and be carried to the lungs. From the lungs, they are coughed up and then swallowed, ultimately reaching the intestines where they mature into adult worms.
Therefore, the correct answer to how hookworms are transmitted is D. by skin contact. This transmission route is different from fecal-oral transmission, vector transmission by insects such as mosquitoes, ticks, and fleas, or air dispersal mechanisms whereby infectious agents spread through airborne particles or droplets.
Which major contribution did Carolus Linnaeus to scientific study?
A classifying plants and proposing the theory of evolution
B classifying organisms and devising a system of scientific names
C studying animal remains and developing methods for experimental design
D using Greek names to identify every living thing
I am pretty sure that the answer is B.
What is NOT true about the evidence that fossils provide?
A. Some fossil organisms are transitional forms between groups of organisms.
B. Fossil organisms often share physical similarities with living organisms.
C. All fossils contain intact DNA that can be sequenced.
D. Fossil ages can often be determined by testing nearby rocks.
Answer:
C. All fossils contain intact DNA that can be sequenced.
Explanation:
Fossils are the impression, trace or preserved remains of once-living thing from past thousands of years such as bones, exoskeletons, objects preserved in amber, and stone imprints of animals or microbes.
Fossils provide evidence about seevral characteristics and features of extinct organism such as evolutionary relationship between organisms and transitional forms between groups of organisms. but all the fossil do not provide evidence about the intact DNA that can be sequenced because some fossils carry DNA rumnants which do not have the ability to get sequenced.
Hence, the correct option is C.
The statement 'all fossils contain intact DNA that can be sequenced' is NOT TRUE about the evidence that fossils provide (Option C).
Fossils are preserved remains or traces of remains (e.g., bones) of past life forms such as, for example, plants and animals, which lived on the Earth a long time ago.Fossil remains do not contain preserved DNA, because this molecule is degraded at room temperature and therefore it cannot be sequenced.DNA is a molecule that shows signs of degradation at only 3 months of storage at room temperature.In conclusion, the statement 'all fossils contain intact DNA that can be sequenced' is NOT TRUE about the evidence that fossils provide (Option C).
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What is the discriminat of the quadratic equation 3-4x=-6x^2
Answer:
-56
Explanation:
ax^2 + bx + c = 0 is the discriminant of the quadratic equation
3 - 4x= -6x^2
to
-6x^2 + 4x -3 = 0
We know that:
a = -6
b = 4
c = -3
Substitute in the formula of discriminant (b^2 - 4ac):
= 4^2 - 4 * (-6) * (-3)
= 16 - 4 * 18
= -56
What happens to this carbon once it ends up in this reservoir? Does it cause any adverse changes to ecosystems there?
Answer:The carbon cycle plays a key role in regulating Earth's global temperature and climate by controlling the amount of carbon dioxide in the atmosphere. The greenhouse effect itself is a naturally occurring phenomenon that makes Earth warm enough for life to exist.
Explanation:
Carbon can be stored in various reservoirs for long periods as part of the carbon cycle, including the atmosphere, oceans, sediment, soil, rocks, and Earth's interior. It can potentially have adverse effects on ecosystems when it enters the atmosphere as CO2.
Explanation:The carbon once it ends up in a reservoir can be stored for long periods as part of the carbon cycle. Carbon reservoirs include the atmosphere, bodies of liquid water (mostly oceans), ocean sediment, soil, rocks (including fossil fuels), and Earth's interior. Carbon can enter the atmosphere again as CO2, which can potentially have adverse effects on ecosystems.
What is the effect of population increase on poverty?
People living in impoverished conditions tend to have 1.______
children. Increase in population may 2._______
poverty because of the need for more resources.
Answer:
1. MORE
2. LEAD TO
Explanation:
Hope this help
Answer:
the answers are more and increase
Explanation:
I need help with this
Answer:
don't know what do
Explanation:
Cells in the thyroid have much higher concentrations of iodide ions than the extracellular fluid that surrounds them, which is delivered by the
blood. Are iodide ions transported into the thyroid cells by active transport or passive transport?
A active transport, because the cell must pump ions from regions of low concentration to high concentration
B. active transport, because charged ions cannot diffuse through the lipid bilayer of the cell membrane
C passive transport, because iodide ions diffuse into the cell from the surrounding fluids
D. passive transport, because charged ions are able to diffuse through the lipid bilayer of the cell membrane
Answer:
A.
Explanation:
Passive transport is defined as the movement of ion and other molecules through cell membrane without any energy input while active transport is the movement of ions and other molecular substances across cell membranes with an energy input which allows, molecules to move from a region of lower concentration to a region of higher concentration.
Uptake of iodide ions by thyroid cell is an active transport which is mediated by sodium/iodide symporter (NIS) protein, found in basolateral membrane of thyroid follicular cells. As the concentration of iodide ions is higher in thyroid cells, active transport make movement of iodide ions form extracellular fluid (lower concentration) to thyroids cells (higher concentration).
Hence, the correct option is A.
Answer:
A.active transport, because the cell must pump ions from regions of low concentration to high concentration
Explanation:
how could knowing that giraffes are four distinct species change the approach of conservationists or zookeepers who work with giraffes?
Answer:
It would help the zookeeper in their breeding program so as not to interbreed the four different species, but rather to breed each species seperately, so as to keep the giraffe as a whole from population pollution by producing hybrids that do not have much conservation values.
Knowing that giraffes are four distinct species could change the approach of conservationists and zookeepers who work with giraffes by requiring different conservation strategies and breeding programs for each species.
Explanation:Giraffes are now recognized as four distinct species: the southern giraffe, the Masai giraffe, the reticulated giraffe, and the northern giraffe.
This new understanding of giraffes as separate species could change the approach of conservationists and zookeepers who work with giraffes by requiring different conservation strategies and breeding programs for each species.
Conservationists and zookeepers would need to consider the specific habitat requirements, feeding preferences, and social behaviors of each species in order to effectively protect and care for them.
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Jill is studying the temperature output of an ammonium chloride hand warmer. What apparatus will best help her monitor the temperature change of the reaction?
Answer:
a thermometer
Explanation:
The apparatus that will help Jill to monitor the temperature change of the reaction would be a thermometer.
A thermometer is an instrument used in the measurement of temperature or temperature gradients across two regions.
A typical thermometer consists of 2 elements, namely;
A sensor that responds to temperature changes, andA scale or graduation that is used to measure the temperature changes.As the sensor responds to changes in temperature, the magnitude of change is indicated on the scale and this magnitude is what is recorded as the temperature of a body of a system.
2 Points
Match the layer of Earth with its characteristic.
Crust
Upper section of the
lithosphere
Inner core
Makes up the
asthenosphere
Outer core
Creates Earth's magnetic
field
Mantle
Hottest part of Earth
Answer:
Crust = upper section of the lithosphere
Mantle = makes up the asthenosphere
Outer = creates earth’s magnetic field
Inner core = hottest part of earth
Explanation:
Following are the correct matches:
Crust - Upper section of the lithosphereInner core - Hottest part of EarthOuter core - Creates Earth's magnetic fieldMantle - Makes up the asthenosphereWhat are the layers of earth?The Earth is made up of four main layers: the crust, the mantle, the outer core, and the inner core.
The crust is the outermost layer of the Earth and is made up of solid rock. It is the thinnest layer of the Earth, only about 3-5 miles (8-12 kilometers) thick.The mantle is the layer of the Earth beneath the crust and is made up of hot, solid rock. It is about 1,800 miles (2,900 kilometers) thick.The outer core is the layer of the Earth beneath the mantle and is made up of hot, liquid metal. It is about 1,400 miles (2,300 kilometers) thick.The inner core is the center of the Earth and is made up of solid metal. It is about 745 miles (1,200 kilometers) in diameter.Learn more about Earth layers, here:
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explain the factors that would influence how fast echinoderms grow and how big they become
Answer:
Environmental factors and climate conditions affect the growth and how fast they grow.
Explanation:
An echinoderm is an organism (all marine) that has a spiny skin. The word "echinoderm" means "spiny skin." Starfish, sea cucumbers, brittle stars, and sea urchins are examples.
Most echinoderms develop from larvae to adolescent echinoderms by direct, or indirect development. In direct development, the fertilized egg is able to enter juvenile stage without becoming a larva. The juveniles stay close to the parent, and are cared for and looked after.
Echinoderms evolved from animals with bilateral symmetry. Although adult echinoderms possess pentaradial, or five-sided, symmetry, echinoderm larvae are ciliated, free-swimming organisms that organize in bilateral symmetry which makes them look like embryonic chordates.
Echinoderms have adapted to match the colour of their surroundings. Also, to protect and structure their bodies, Echinoderms such as sea urchins have interlocking plates of Calcium Carbonate which form a very hard internal skeleton.
How is the reproductive system different from
other body systems?
I
The reproductive system is distinct from other body systems due to its sexual dimorphism, hormonal regulation, and function of producing offspring, with significant anatomical differences between males and females.
The reproductive system is unique among human body systems in that it shows substantial differences between males and females. Unlike systems like the digestive or immune systems, which perform their functions similarly in all individuals, the reproductive system involves different anatomies between the two sexes. From embryonic development to adulthood, the components of the male and female reproductive systems diverge due to the influence of hormones, such as testosterone, and the embryo's genetic makeup.
Components like the testes in males and ovaries in females have different structures and functions related to the production of gametes. Moreover, the reproductive system's primary function is to produce new individuals, unlike other systems which are oriented towards sustaining the life of the organism itself. The complexities of this system are regulated by a network of hormones and behaviors that are intricately linked to both the brain and the endocrine system.
Plants require moisture, oxygen, carbon dioxide,light, and minerals for growth. These requirements are best described as *
I'd say these requirements are best described as reactants.
Plants require moisture, oxygen, carbon dioxide, light, and minerals for growth. These requirements are best described as Abiotic components.
What is Abiotic components?An abiotic factor is defined as the non-living part of an ecosystem that shapes its environment whereas in a terrestrial ecosystem, examples may include temperature, light and water and in a marine ecosystem, abiotic factors would include salinity and ocean currents.
A certain plant needs moisture, oxygen, carbon dioxide, light and minerals to survive which are abiotic components. Abiotic and biotic factors work together to create a unique ecosystem.
Thus, Plants require moisture, oxygen, carbon dioxide, light, and minerals for growth. These requirements are best described as Abiotic components.
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Which climate favors mechanical weathering?
dry dinale
cold climate
warm climate
desert cmate
Name three natural sources of calcium carbonate?
Answer: Calcite, aragonite, vaterite
Explanation:
Identify the functions of the brain. passes information to and from the cerebrum is responsible for higher-level thinking skills helps maintain homeostasis; regulates body temperature
Answer:
Explanation:
Thalamus passes information to and from the cerebrum
Cerebrum is responsible for higher-level thinking skills
Hypothalamus helps maintain homeostasis; regulates body temperature
Final answer:
The brain has various functions including transmitting information, higher-level thinking, maintaining homeostasis, and temperature regulation, involving different parts like the cerebrum, diencephalon, and brainstem.
Explanation:
The functions of the brain include numerous tasks such as controlling thought processes, regulating autonomic functions, and maintaining homeostasis.
Specifically, A. passes information to and from the cerebrum (the task of diencephalon components like the thalamus and hypothalamus), B. is responsible for higher-level thinking skills (a function of the cerebrum), C. helps maintain homeostasis (a key role especially of the hypothalamus), and D. regulates body temperature (also a role of the hypothalamus).
The cerebellum aids in coordinating voluntary and involuntary motor activities, while structures like the medulla oblongata are crucial for autonomic functions such as heart rate and respiration.
ASAP!! 100 points! Only answer correctly please :)
1Folding is common in areas of thick _____.
igneous rock
metamorphic rock
sedimentary rock
2Eroded materials are called _____.
faults
folds
lava
sediment
3The mechanism which would permit large-scale movement of entire continents _____.
has been conclusively demonstrated
is suggested as theory
4Scientific data have been published to propose that the continents of Europe and North America are a0 at a rate of a1 cm per year.
5 Most of the oxygen available on Earth is produced by _____.
oceanic plankton
the atmosphere
terrestrial plants
the water cycle
Answer:
1) sedimentary
2) sediment
3) Continental Drift
5) Phytoplankton
Explanation:
Answer:
That should be
1) sedimentary
2) sediment
3) Continental Drift
5) Phytoplankton
Good luck
Answer help points a lot
Answer:
I think the answer is F.
Explanation:
F) B and D
*B. the number of them increased D.they consumed smaller things in the water*
Hope this helped ! :)
What are some of the human activities that threaten the world's largest surviving regions of rainforest? (Site 1)
Answer:
Deforestation
Explanation:
Answer:
Almost half of the rainforests have been destroyed due to the human demand of land and wood. Logging interests that involve cutting down rainforests for timber is also a threatening human activity. Mining operations cut down forests completely to dig mines. Hydroelectric projects destroy large stretches of rainforest by flooding. Road building also is a problem
Explanation:
PLEASE HELP :(
how do physical and chemical properties help in the identification of matter
Answer:
Both physical and chemical properties play a crucial role in identifying unknown matter. Here's how they work together:
Physical Properties:
Easy to Observe: These properties can be observed without changing the matter's composition. Examples include color, texture, density, melting point, boiling point, and electrical conductivity.
Initial Screening: By observing physical properties, you can narrow down the possibilities. For instance, a shiny, yellow metal with a high melting point suggests gold, while a white, powdery substance with a low melting point could be sugar.
Chemical Properties:
Deeper Identification: Chemical properties describe how a substance reacts with other materials. Observing these requires a controlled experiment that changes the substance's composition. Examples include flammability, reactivity with acids, and the production of specific gases during a reaction.
Confirmation: By testing a substance's reactivity, you can confirm your initial suspicions based on physical properties. If the unknown metal reacts with sulfur to form a black sulfide, it strengthens the possibility of it being silver.
Together is Better:
Combined Approach: Using both physical and chemical properties provides a more robust identification process. For instance, if an unknown liquid is colorless, boils around 100°C, and extinguishes a flame, these combined properties strongly suggest it's water.
In conclusion, physical properties offer a starting point for identification, while chemical properties provide a more definitive confirmation. By considering both, scientists can effectively identify unknown substances.
Explanation:
Physical properties describe appearance and behavior, while chemical properties detail how substances react, aiding in matter identification.
Identifying matter involves observing and understanding its physical and chemical properties. Here's how these properties aid in identification:
Step 1: Observation:
Begin by observing the characteristics of the substance. Physical properties are those that can be observed or measured without changing the substance's chemical composition. Examples include color, density, melting point, boiling point, odor, and conductivity.
Step 2: Physical Properties:
Physical properties provide clues about the substance's composition and behavior under various conditions. For instance, the color and appearance of a substance can help differentiate it from others. The density helps determine its mass per unit volume, while the melting and boiling points indicate its thermal stability.
Step 3: Chemical Properties:
Chemical properties describe how a substance interacts with other substances and undergoes chemical changes. These properties include reactivity, combustibility, acidity, and the ability to undergo specific reactions. For example, if a substance reacts with acid to produce gas, it indicates a specific chemical property.
Step 4: Comparison and Analysis:
By comparing the observed physical and chemical properties of an unknown substance with known properties of various materials, scientists can narrow down the possibilities and identify the substance. This process involves using databases, reference materials, and experimental data to match the observed properties.
Step 5: Verification:
Once a potential identification is made based on observed properties, further testing and analysis may be conducted to confirm the identification. This may involve performing additional chemical reactions, spectroscopic analysis, or other specialized tests to validate the initial assessment.
Step 6: Conclusion:
Based on the comprehensive analysis of physical and chemical properties, a conclusive identification of the matter can be made. This identification aids in understanding its properties, behavior, and potential uses in various applications.
While watching a recent science fiction movie, one Klingon spaceship blows up a Droid spaceship with a laser gun. The Klingon crew watches out the port window and covers their ears to muffle the noise from the explosion. Scientifically, this scene is inaccurate because
Answer:
Space is a vacuum thus you wouldn't be able to hear any noise.
Where is aggregate generally found? Check all that apply.
floodplains
alluvial fans
mines
beneath the top soil
above the top soil
Answer:
floodplains
alluvial fans
mines
Explanation:
A soil aggregate are groups of primary soil particles which bond to one another more tightly than to surrounding soil particles. Soil aggregates has advantages such as beginners stable against rainfall and water movement thereby reducing erosion and releasing individual soil particles when struck with water that can seal the soil surface and clog pores which helps in soil proper soil aeration.
Soil aggregates are common in floodplains,alluvial fans,mines.
How might the human body be compared to a car bicycle? Need help like now! 15 points <33
Answer:
There are some similarities present between human body and car.
Explanation:
In human body, mechanical work is done with the help of energy while the car moves when energy is present in it. Human body gets energy by eating food while the car gets energy from the burning of fossil fuels such as petrol, diesel and CNG etc. Both human and car used organic compounds for the generation of energy. In human body, movement occurs through legs while in cars wheels used for movement from place to place. In human body, stomach produces energy while in cars, engine generates energy.
hey guys! please help me with my research project thats about how the corona virus is affecting the climate in a positive way
does anyone have facts about how the corona virus is affecting the world. i know this one and i saw it on a post but i forgot what it said but i think it said this, you can now see italys river from far away as its crystel clear. does anyone have facts thats similar to this. thanks! i will award 10 points if you answer
The 33 separate bones of the backbone are called
Answer:
Vertebrae
Explanation:
Your back can't be a solid bone because you wouldn't be able to pick things up off the ground, or twist around to see things.
Answer:
Vertebrae
Explanation:
Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx.
Which is not a type of mechanical wave?
O A. surface wave
O B. earthquake wahy
O c. electromagnetic wave
O D. sound wave
Answer:
c. electromagnetic wave
**Explanation**
electromagnetic waves are waves that have an electric and magnetic nature and are capable of traveling through a vacuum. Electromagnetic waves do not require a medium in order to transport their energy. Mechanical waves are waves that require a medium in order to transport their energy from one location to another.
✌️;)
1. What are 3 personality traits that storm chasers should have?
Answer:
first is narsacisstic
second lovely
3 is boastful
Which statement best describes the climate of a city?
The average annual temperature of Austin, TX is 68.5°F.
The temperature in El Paso, Texas today at dawn was 57°F.
San Antonio, Texas had a high temperature of 102°F today.
Dallas, Texas had 8.6 centimeters of rain today.
Answer:
Austin tx
Explanation:
Climate is an overrall average of the temperature and such recorded over a period of time. The others only talk about the temperature in one day while the austin one talks about the annual temperature. Weather is recorded in one day and climate is over a long period.
The average annual temperature of a city best describes its climate, as climate refers to the long-term averages of the weather conditions. Statements with specific one-time temperature readings describe weather, not climate. Climate understanding also involves considering temperature ranges across seasons. The correct option is: The average annual temperature of Austin, TX is 68.5°F.
Understanding Climate Through Temperature Averages
The statement that best describes the climate of a city is 'The average annual temperature of Austin, TX is 68.5°F.' This is because climate is defined as the average weather conditions of a place over a long period, typically over 30 years, including factors such as temperature, precipitation, and wind. The other statements mention specific temperature measurements at a given time or on a single day, which are more indicative of weather rather than climate.
For a more comprehensive understanding of a location's climate, it's essential to consider both average temperatures and the variations or temperature ranges they experience across different seasons. An area could have the same annual average temperature as another but drastically different climates due to differing ranges between their hottest and coldest temperatures.